Diffuse-type Tenosynovial Giant-Cell Tumour (d-TGCT) of large joints is a rare, locally aggressive, soft tissue tumour affecting predominantly the knee. Previously classified as Pigmented Villonodular Synovitis (PVNS), this monoarticular disease arises from the synovial lining and is more common in younger adults. Given the diffuse and aggressive nature of this tumour, local control is often difficult and recurrence rates are high. Current literature is comprised primarily of small, and a few larger but heterogeneous, observational studies. Both arthroscopic and open synovectomy techniques, or combinations thereof, have been described for the treatment of d-TGCT of the knee. There is, however, no consensus on the best approach to minimize recurrence of d-TGCT of the knee. Some limited evidence would suggest that a staged, open anterior and posterior synovectomy might be of benefit in reducing recurrence. To our knowledge, no case series has specifically looked at the recurrence rate of d-TGCT of the knee following a staged, open, posterior and anterior approach. We hypothesized that this approach may provide better recurrence rates as suggested by larger more heterogeneous series. A retrospective review of the local pathology database was performed to identify all cases of d-TGCT or PVNS of the knee treated surgically at our institution over the past 15 years. All cases were treated by a single fellowship-trained orthopaedic oncology surgeon, using a consistent, staged, open, posterior and anterior approach for synovectomy. All cases were confirmed by histopathology and followed-up with regular repeat MRI to monitor for recurrence. Medical records of these patients were reviewed to extract demographic information, as well as outcomes data, specifically recurrence rate and complications. Any adjuvant treatments or subsequent surgical interventions were noted. Twenty-three patients with a minimum follow-up of two years were identified. Mean age was 36.3 at the time of treatment. There were 10 females and 13 males. Mean follow-up was seven and a half years. Fourteen of 23 (60.9%) had no previous treatment. Five of 23 had a previous arthroscopic synovectomy, one of 23 had a previous combined anterior arthroscopic and posterior open synovectomy, and three of 23 had a previous open synovectomy. Mean time between stages was 87 days (2.9 months). Seven of 23 (30.4%) patients had a recurrence. Of these, three of seven (42.9%) were treated with Imatinib, and four of seven (57.1%) were treated with repeat surgery (three of four arthroscopic and one of four open). Recurrence rates of d-TGCT in the literature vary widely but tend to be high. In our retrospective study, a staged, open, anterior and posterior synovectomy provides recurrence rates that are lower than rates previously reported in the literature. These findings support prior data suggesting this approach may result in better rates of recurrence for this highly recurrent difficult to treat tumour

Diffuse-type Tenosynovial Giant-Cell Tumour (d-TGCT) of large joints is a rare, locally aggressive, soft tissue tumour affecting predominantly the knee. Previously classified as Pigmented Villonodular Synovitis (PVNS), this monoarticular disease arises from the synovial lining and is more common in younger adults. Given the diffuse and aggressive nature of this tumour, local control is often difficult and recurrence rates are high. Current literature is comprised primarily of small, and a few larger but heterogeneous, observational studies. Both arthroscopic and open synovectomy techniques, or combinations thereof, have been described for the treatment of d-TGCT of the knee. There is, however, no consensus on the best approach to minimize recurrence of d-TGCT of the knee. Some limited evidence would suggest that a staged, open anterior and posterior synovectomy might be of benefit in reducing recurrence. To our knowledge, no case series has specifically looked at the recurrence rate of d-TGCT of the knee following a staged, open, posterior and anterior approach. We hypothesized that this approach may provide better recurrence rates as suggested by larger more heterogeneous series. A retrospective review of the local pathology database was performed to identify all cases of d-TGCT or PVNS of the knee treated surgically at our institution over the past 15 years. All cases were treated by a single fellowship-trained orthopaedic oncology surgeon, using a consistent, staged, open, posterior and anterior approach for synovectomy. All cases were confirmed by histopathology and followed-up with regular repeat MRI to monitor for recurrence. Medical records of these patients were reviewed to extract demographic information, as well as outcomes data, specifically recurrence rate and complications. Any adjuvant treatments or subsequent surgical interventions were noted. Twenty-three patients with a minimum follow-up of two years were identified. Mean age was 36.3 at the time of treatment. There were 10 females and 13 males. Mean follow-up was seven and a half years. Fourteen of 23 (60.9%) had no previous treatment. Five of 23 had a previous arthroscopic synovectomy, one of 23 had a previous combined anterior arthroscopic and posterior open synovectomy, and three of 23 had a previous open synovectomy. Mean time between stages was 87 days (2.9 months). Seven of 23 (30.4%) patients had a recurrence. Of these, three of seven (42.9%) were treated with Imatinib, and four of seven (57.1%) were treated with repeat surgery (three of four arthroscopic and one of four open). Recurrence rates of d-TGCT in the literature vary widely but tend to be high. In our retrospective study, a staged, open, anterior and posterior synovectomy provides recurrence rates that are lower than rates previously reported in the literature. These findings support prior data suggesting this approach may result in better rates of recurrence for this highly recurrent difficult to treat tumour

Purpose. There is controversial whether synovectomy must be done in primary total knee arthroplasty (TKA). The objectivity of the study was to compare the effect of synovectomy on inflammation and clinical outcomes after surgical treatment of knee osteoarthritis. Methods. A total of 240 patients who underwent primary unilateral TKR were randomly divided into a group without (Group A) and with synovectomy (Group B). All operations were performed by the same surgeon and follow-up was for 4 year. Clinical outcomes (including American Knee Society score (AKS), SF-36, and HSS scores) serum inflammatory markers (including interleukin-6 (IL-6), CRP and ESR) and the difference in temperature of the affected knee skin, swelling, ROM, patients VAS satisfaction score and VAS pain score were sequentially evaluated until 4 years after surgery. Result. There were no statistically different clinical parameters between the two groups preoperatively. At the 4 years follow-up, both groups had a similarly significantly improved AKS clinical and functional score. Similar changes in serial inflammatory markers were identified in both groups. In addition, no difference was seen regarding drainage-fluid inflammatory markers at any follow-up time. There was no difference in respect to patients satisfaction score from surgery to 1 year, but Group B showed greater patients satisfaction score from 2 year to four year, with less number of patients suffering from anterior pain. There was no difference with regard to other parameters at any follow-up time. Conclusions. Synovectomy in primary TKA does not seem to have any clinical advantage and shorten the duration of the inflammatory response, but it might increase patient satisfaction score and reduce anterior knee pain

Aim. The aim of this systematic review was to assess the existing published data on tuberculous arthritis involving native joints in adults aged 18 years and older. The specific research questions focused on the diagnosis and management of the disease. Method. This study was performed in accordance with the guidelines provided in the Preferred Reporting Items for Systematic reviews and Meta-Analysis extension for Scoping Reviews (PRISMA-ScR). A systematic literature search was undertaken of Pubmed, Web of Science, Scopus and the Cochrane library. Only studies published in English since 1970 were considered. Case series involving less than 10 patients, systematic and narrative reviews, and laboratory or animal studies were excluded. We also excluded reports of TB infections not involving a “native joint” and tuberculosis of the spine. The level of evidence and strength of recommendations was performed in accordance with the GRADE system. Results. The systematic review of the literature yielded 2023 potential sources. Following deduplication, screening and full-text review, 20 data sources involving 573 patients from nine countries, were included. There was considerable variation amongst the studies in terms of the approach to diagnosis and management. The most common method used to confirm the diagnosis was microbiological culture of tissue obtained by biopsy, with positive findings in 93% of cases. Medical management involved a median 12 months of antitubercular treatment (IQR 8–16; range 4–18 months). Duration of pre-operative treatment ranged from two to 12 weeks in duration. Surgery was performed in approximately 87% of patients and varied from arthroscopic debridement to complete synovectomy combined with total joint arthroplasty. When arthroplasty and arthrodesis cases are excluded, 80% of patients received an open or arthroscopic debridement. The mean follow-up time of all studies was 26 months, with most studies demonstrating a minimum follow-up of at least six-months (range 3–112 months). Recurrence rates were reported in most studies, with an overall average recurrence rate of 7,4% (35 of 475). Conclusions. The current literature on TB arthritis highlights the need for the establishment of standardised diagnostic criteria. Further research is needed to define the optimal approach to medical and surgical treatment. The role of early debridement in active tuberculous arthritis needs to be explored further. Specifically, comparative studies are required to address the questions around use of medical treatment alone versus in combination with surgical intervention

Pigmented villonodular synovitis is a monoarticular proliferative process most commonly involving the synovium of the knee joint. There is considerable debate with regards to diagnosis and effective treatment. We present our experience of managing PVNS of the knee joint over a 12 year period. Twenty-eight patients were reviewed. MRI was used to establish recurrence in symptomatic patients rather than routine screening and to identify posterior disease prior to surgery. Eight patients had localised disease and were all treated with open synovectomy and excision of the lesion, with no evidence of recurrence. Twenty patients had diffuse disease, eight treated arthroscopically and twelve with open total synovectomy. Nineteen patients (95%) had recurrence on MRI, however, only five (25%) had evidence of clinical recurrence. There were no significant complications following arthroscopic synovectomy. Open synovectomy, in contrast, was associated with three wound infections and two thrombo-embolisms. Three patients had Complex regional pain syndrome. We believe diffuse disease should be treated with arthroscopic synovectomy which is associated with minimal morbidity and can be repeated to maintain disease control. Radiotherapy is helpful in very aggressive cases. TKR was used when there was associated articular erosion

Improvements in ceramic materials, component design, and surgical technique have made ceramic bearing complications increasingly rare. However, when it happens, a fractured ceramic component can cause significant pain and morbidity following total hip arthroplasty (THA). The hard and sharp particulate debris from fractured ceramic components can cause damage to the existing hip prosthesis and jeopardise subsequent revision THA results due to third body wear. Patients with ceramic fractures can present with sudden onset of pain and dysfunction. Often, the patient will report a noisy hip articulation. Radiographs can range from subtle densities surrounding the hip implant to complete disintegration and loss of sphericity of the femoral head or acetabular liner. Ceramic component fractures should be treated expeditiously. Revision options for failed ceramic components depend on existing component fixation, position, and locking mechanism and femoral trunnion integrity. In order to retain the implants, the components must be well-fixed, in good position, and have tapers and locking mechanisms that can accept new modular components. Additionally, an extensile exposure and complete synovectomy are necessary to remove as much of the sharp particulate debris. Finally, a new ceramic ball head with a titanium inner sleeve should be used in revisions for fractured ceramics due to their hardness and scratch resistance. Early results for revision surgery for fractured ceramic components were inconsistent. Allain et al. reported on a series of 105 revisions performed for ceramic head fractures and found that the survivorship at 5 years was only 63%. The authors reported a high reoperation rate and also worse survivorship when the acetabular component was retained, a metal head was used for revisions, age younger than 50 years, and when a complete synovectomy was not performed at the time of revision. More recently, Sharma and colleagues reported on a series of 8 ceramic fractures revised to a metal-on-polyethylene articulation performed with a complete synovectomy. At 10-year follow-up, the authors reported on failures; increased wear; or lesser function compared to 6 matched patients undergoing revision using similar implants for other diagnoses. Others have also reported catastrophic failures when revising fractured ceramic components using metal ball heads. In summary, ceramic bearing complications in THA are rare but catastrophic events. A systematic approach to evaluation and management is necessary to ensure a safe return

Ceramic bearing complications are rare but can cause significant pain and morbidity following total hip arthroplasty (THA). The hard and sharp particulate debris from fractured ceramic components can cause damage to the existing hip prosthesis and jeopardise subsequent revision THA results due to third body wear. Patients with ceramic fractures can present with sudden onset of pain and dysfunction. Often, the patient will report a noisy hip articulation. Radiographs can range from subtle densities surrounding the hip implant to complete disintegration and loss of sphericity of the femoral head or acetabular liner. Ceramic component fractures should be treated expeditiously. Revision options for failed ceramic components depend on existing component fixation, position, and locking mechanism and femoral trunnion integrity. In order to retain the implants, the components must be well-fixed, in good position, and have tapers and locking mechanisms that can accept new modular components. Additionally, an extensile exposure and complete synovectomy are necessary to remove the sharp particulate debris. Finally, a new ceramic ball head with a titanium inner sleeve should be used in revisions for fractured ceramics due to their hardness and scratch resistance. Early results for revision surgery for fractured ceramic components were inconsistent. Allain et al. reported on a series of 105 revisions performed for ceramic head fractures and found that the survivorship at 5 years was only 63%. The authors reported a high reoperation rate and also worse survivorship when the acetabular component was retained, a metal head was used for revisions, age younger than 50 years, and when a complete synovectomy was not performed at the time of revision. More recently, Sharma and colleagues reported on a series of 8 ceramic fractures revised to a metal-on-polyethylene articulation performed with a complete synovectomy. At 10-year follow up, the authors reported on failures; increased wear; or lesser function compared to 6 matched patients undergoing revision using similar implants for other diagnoses. Others have also reported catastrophic failures when revising fractured ceramic components using metal ball heads. In summary, ceramic bearing complications in THA are rare but catastrophic events. A systematic approach to evaluation and management is necessary to ensure a safe return

Total Knee Arthroplasty (TKA) necessitates disruption of well-vascularised tissue during exposure and soft tissue release as well as from the cutting of bone, and thus bleeding into the joint space routinely occurs to some degree following TKA. Defining a complication from bleeding is not necessarily straightforward, but includes 3 different conditions: hemarthrosis, hematoma, and bloody wound drainage. All of these conditions can be seen in the normal postoperative setting, and when mild, may be simply observed. However, persistent swelling resulting in clinical symptoms should be appropriately treated. A hemarthrosis is defined as blood being contained in the knee capsule. Although some bleeding is expected, “excessive” hemarthrosis results in increased pain limiting or difficulty regaining motion. If high levels of fluid pressure are present, rupture of the arthrotomy may occur. A hematoma occurs when intra-articular blood escapes the arthrotomy and drains into the overlying soft tissues. This may occur following performance of a large lateral release or an insufficient arthrotomy closure or simply secondary to a large hemarthrosis under tension. Symptoms include ecchymosis, soft tissue swelling, and potential skin complications. Increased pain and limited range of motion frequently accompany these symptoms. Wound drainage may present as a knee that continues to have bloody or serous drainage that continues long after the first or second dressing change. It is this continued wound drainage that is most worrisome, with increased wound infection rates when prolonged drainage is allowed to persist. While excessive bleeding during the early postoperative period is most common, isolated or recurrent hemarthrosis may occur long after recovery from surgery. The incidence of postoperative hemarthrosis is not well studied, but the need for surgical treatment is uncommon. Recurrent hemarthrosis is also relatively rare after TKA and has been reported at rates between 0.3% and 1.6%. The etiology of this complication can be systemic or local, and initial workup should include coagulation studies to rule out any underlying systemic coagulopathy. Conservative therapy including rest, cooling, and elevation is the preferred treatment for mild cases. If conservative treatment is not successful, or the acute hemarthrosis is clinically tense, interfering with recovery, or threatening wound healing, drainage may be the preferable option. This can be done by opening the arthrotomy in the operating room or through large bore arthroscopy cannulae. Careful attention to debridement of clotted blood must be followed by a meticulous search for potential sources of bleeding which should be managed appropriately. Recurrent hemarthrosis may occur at any time but is not commonly diagnosed until the patient has left the early recovery period. Repeated bleeding episodes may lead to an inflammatory cascade that propagates bleeding events more readily. If coagulation studies are normal, the most common source is the impingement of proliferative synovium or other retained soft tissue between the articulating components of the knee prosthesis. Other causes may be multifactorial and synergistic but are not well understood, making diagnosis and treatment more difficult. If symptoms persist, classical treatment has consisted of open or arthroscopic synovectomy. Over the past decade angiography and angiographic embolization of the source of bleeding has been successful. In a recent meta-analysis including 99 patients, technical success rates of 99% were noted, though 2 cases became infected and 10 cases suffered recurrent bleeding episodes. Radio-active synovectomy has also been successful

Total Knee Arthroplasty (TKA) necessitates disruption of well vascularised tissue during exposure and soft tissue release as well as from the cutting of bone, and thus bleeding into the joint space routinely occurs to some degree following TKA. Defining a complication from bleeding is not necessarily straightforward, but includes 3 different conditions: hemarthrosis, hematoma, and bloody wound drainage. All of these conditions can be seen in the normal post-operative setting, and when mild may be simply observed. However, persistent swelling resulting in clinical symptoms should be appropriately treated. A hemarthrosis is defined as blood being contained in the knee capsule. Although some bleeding is expected, “excessive” hemarthrosis results in increased pain limiting or difficulty regaining motion. If high levels of fluid pressure are present, rupture of the arthrotomy may occur. A hematoma occurs when intra-articular blood escapes the arthrotomy and drains into the overlying soft tissues. This may occur following performance of a large lateral release or an insufficient arthrotomy closure or simply secondary to a large hemarthrosis under tension. Symptoms include ecchymosis, soft tissue swelling, and potential skin complications. Increased pain and limited range of motion frequently accompany these symptoms. Wound drainage may present as a knee that continues to have bloody or serous drainage that continues long after the first or second dressing change. It is this continued wound drainage that is most worrisome with increased wound infection rates when prolonged drainage is allowed to persist. The incidence of post-operative hemarthrosis as a clinical problem is not well studied, but the need for surgical treatment is uncommon. Recurrent hemarthrosis is also relatively rare after total knee arthroplasty and has been reported at rates between 0.3% and 1.6%. The etiology of this complication can be systemic or local, and initial work-up should include coagulation studies to rule out any underling systemic coagulopathy. Conservative therapy including rest, cooling, and elevation is the preferred treatment for mild cases. If conservative treatment is not successful, or the acute hemarthrosis is clinically tense, interfering with recovery, or threatening wound healing, drainage may be the preferable option. This can be done by opening the arthrotomy in the operating room or through a large bore arthroscopy cannulae. Careful attention to debridement of clotted blood must be followed by a meticulous search for potential sources of bleeding which should be managed appropriately. Recurrent hemarthrosis may occur at any time after surgery. Repeated bleeding episodes may lead to an inflammatory cascade that propagates bleeding events more readily. If coagulation studies are normal, the most common source is the impingement of proliferative synovium or other retained soft tissue between the articulating components of the knee prosthesis. Other causes include damage to the geniculate or popliteal vessels with pseudo aneurysm formation. Mild to moderate clinical knee instability may be associated with bloody synovial effusions but limited clinical complaint specific to instability. Other causes may be multifactorial and synergistic but are not well understood, making diagnosis and treatment more difficult. If symptoms persist, and the resulting disability is sufficient, classical treatment has consisted of open or arthroscopic synovectomy. Over the past decade angiography and angiographic embolization of the source of bleeding has been shown to be successful. Radio-active synovectomy has also been successful

Objective. The aim of this study was to investigate the clinical results of treatment for patients with periprosthetic joint infection (PJI) following total knee arthroplasty (TKA) in our department. Patients and Methods. Between April 2004 and March 2014, 9 patients with rheumatoid arthritis (RA) and 6 patients with osteoarthritis (OA) were identified as PJI following TKA and treated in our hospital. We investigated retrospectively the data of each patient, including the clinical background and the peri-operative data as well as the outcome at final follow-up. Results. The mean duration between the TKA and the onset of PJI was 5.8 years (1–234 months), and 3 cases were PJI within 1 year following TKA. In RA patients, 5 of 9 patients used glucocorticoids and the mean dosage was 4.4 mg per day (2–8 mg) and 4 of 9 patients were treated by using biologics. Intensive irrigation and synovectomy was done in 11 patients, one-stage revision surgery in 2 patients, removal of prosthesis with antibiotic-containing cement spacer in 1 patient, and treated conservatively in 1 patient due to severe renal dysfunction. At the final follow-up, the knee prosthesis was survived in all patients except the removal case. However, continuous usage of oral antibiotics were needed for long period to avoid recurrence of infection. Discussions and Conclusions. PJI is one of the most serious problems following total joint arthroplasty and intensive treatment was usually applied to control infection. This study showed that surgical intervention such as intensive irrigation and synovectomy was useful for treatment PJI. Although it remains controversial whether one-stage or two-stage revision surgery is suitable for treatment of PJI following TKA, one-stage revision surgery was useful in our cases. Because 12 of 15 cases were PJI more than 1 year after TKA, we should consider the risk of late-onset infection, especially in RA patients with usage of glucocorticoids or biologics

Revision of fractured ceramic-on-ceramic total hip replacements with a cobalt-chromium (CoCr) alloy-on-polyethylene articulation can facilitate metallosis and require further expensive revision surgery [1–3]. In the present study, a fifty-two year old male patient suffered from fatal cardiomyopathy after undergoing revision total hip arthroplasty. The patient had received a polyethylene-ceramic acetabular liner and a ceramic femoral head as his primary total hip replacement. The polyethylene-ceramic sandwich acetabular liner fractured in vivo after 58 months and the patient underwent his first revision surgery where he received a Vitamin E stabilized acetabular Polyethylene (PE) liner and a CoCr alloy femoral head with documented synovectomy at that time. After 15 months, the patient was admitted to hospital in cardiogenic shock, with retrieval of the bearing components. Before the second revision surgery, peak serum cobalt levels measured 6,521 μg/L, 78-times greater than serum cobalt levels of 83μg/L associated with cobalt poisoning [4]. Serum titanium levels found in the patient measured 17.5 μg/L) normal, healthy range 0–1.4 μg/L). The retrieved CoCr alloy femoral head had lost a total of 28.3g (24% or an estimated amount of 102 × 10. −9. wear particles (∼2 μm diameter) [1]) within 16 months of in vivo service. Despite initiating a cobalt chelating therapy, the patients' cardiac left ventricular ejection fraction remained reduced at 6%. This was followed by multi-organ failure, and ultimately the patient passed away shortly after being taken off life support. Embedded ceramic particles were found on the backside and articular surfaces of the Vitamin E-stabilized PE acetabular liner. Evidence of fretting wear on the titanium (Ti) alloy acetabular shell was present, possibly explaining the increased serum Ti levels. Scanning electron microscopy and energy dispersive X-ray analyses confirmed Ti alloy transfer on the embedded ceramic particles on the backside PE liner surface and CoCr alloy transfer on the embedded ceramic particles on the articular PE liner surface. A fractured ceramic-on-ceramic total hip replacement should not be revised to a CoCr alloy-on-polyethylene articulation irrespective of concurrent synovectomy [5] as it can cause severe, third-body wear to the CoCr alloy femoral head that can lead to metallosis with fatal, systemic consequences

Aims

As an alternative to external fixators, intramedullary lengthening nails (ILNs) can be employed for distraction osteogenesis. While previous studies have demonstrated that typical complications of external devices, such as soft-tissue tethering, and pin site infection can be avoided with ILNs, there is a lack of studies that exclusively investigated tibial distraction osteogenesis with motorized ILNs inserted via an antegrade approach.

The battle of revision TKA is won or lost with safe, effective, and minimally bony-destructive implant removal, protecting all ligamentous stabilisers of the knee and, most importantly, the extensor mechanism. For exposure, incisions should be long and generous to allow adequate access. A standard medial parapatellar capsular arthrotomy is preferred. A synovectomy is performed followed by debridement of all scar tissue, especially in the medial and lateral gutters. All peripatellar scar tissue is excised followed by release of scar tissue within the patellar tendon, allowing for displacement or everting of the patella. As patellar tendon avulsion at any time of knee surgery yields disastrous results, the surgeon should be continuously evaluating the patellar tendon integrity, especially while displacing/everting the patella and bringing the knee into flexion. If displacement/eversion is difficult, consider rectis-snip, V-Y quadricepsplasty, or tibial tubercle osteotomy. The long-held requisite for patellar eversion prior to component removal is inaccurate. In most cases simple lateral patellar subluxation will provide adequate exposure. If a modular tibial system is involved, removal of the tibial polyethylene will decompress the knee, allowing for easier access to patellar, femoral, and tibial components. For patellar component removal, first identify the border of the patella, then carefully clean and debride the interface, preferably with electrocautery. If the tibial component is cemented all-polyethylene, remove using an oscillating saw at the prosthetic-bone interface. Debride the remaining cement with hand tools, ultrasonic tools, or burrs. Remove the remaining peg using a low-speed burr. If the tibial component is metal-backed, then utilise a thin saw blade or reciprocating saw to negotiate the undersurface of the component between the pegs. If pegs are peripherally located, cut with a diamond disc circular cutting tool. Use a trephine to remove the pegs. For femoral component removal, identify the prosthetic-bone/prosthetic-cement interface then remove soft tissue from the interface, preferably with electrocautery. Disrupt the interface around all aspects of the component, using any of following: Gigli saw for cementless components only, micro saw, standard oscillating saw, reciprocating saw, a series of thin osteotomes, or ultrasonic equipment. If the femoral component is stemmed, remove the component in two segments using an appropriate screwdriver to remove the screw locking the stem to the component. Remove the femoral component with a retrodriver or femoral component extractor. Debride cement with hand tools or burr, using care to avoid bone fracture. If a stem is present, then remove with the appropriate extraction device. If “mismatch” exists, where femoral (or likewise, tibial) boss is smaller in diameter than the stem, creating a cement block prohibiting stem removal, remove the cement with hand tools or burr. If the stem is cemented, use hand tools, ultrasonic tools, or a burr to debride the cement. Curette and clean the canals. For tibial component removal, disrupt the prosthetic-cement/prosthetic-bone interface using an oscillating or reciprocating saw. Gently remove the tibial component with a retrodriver or tibial extractor. If stem extensions are utilised, disengage and debride all proximal cement prior to removing the stem. If stem is present, then remove stem with appropriate extraction device. If stem is grit-blasted and well-fixed, create 8mm burr holes 1.5 to 2.5cm distal to tibial tray on medial aspect and a small divot using burr, then drive implant proximally with Anspach punch. Alternatively, a tibial tubercle osteotomy may be performed. If the stem is cemented, use hand tools, ultrasonic tools or burr to debride cement

We present seven patients with recurrent haemarthroses after total knee arthroplasty, caused by an inherent platelet function defect. These patients developed painful knee swelling, persistent bleeding and/or wound breakdown, a platelet factor 3 availability defect being identified in all cases. Surgical exploration, with joint debridement, lavage and synovectomy, was performed in four patients who did not improve with conservative therapy. Histopathological examination of synovium revealed a focal synovial reaction with histiocytic infiltration, and occasional foreign-body giant cells. One patient required an early revision because of aseptic loosening of their tibial component. The condition was treated by single-donor platelet transfusions with good results. The diagnosis, management, and relevance of this disorder are discussed

Stiffness remains one of the most common, and challenging postoperative complications after TKA. Preoperative motion and diagnosis can influence postoperative motion, and careful patient counseling about expectations is important. Postoperative stiffness should be evaluated by ruling out infections, metal allergy, or too aggressive physical therapy. A careful physical and radiographic examination is required. Manipulation under anesthesia (MUA) in selected cases can be helpful. The best timing to perform MUA is between the 6th and 10th week postoperatively. Careful technique is required to minimise the risk of fracture or soft tissue injury. This requires complete paralysis! For more chronic stiffness, revision may be indicated if an etiology can be identified. An excessively thick patellar resurfacing, an overstuffed tibia insert, an oversized femoral component, or gross malrotation should be corrected. During revision, thorough synovectomy, release of contractures, ligamentous balancing and restoration of the joint line is required. Careful attention to component rotation, and sizing is critical. Downsizing components is helpful to place less volume into the joint space. Patients should be counseled that the results of revision for stiffness are mixed and somewhat unpredictable. More frequent postoperative nurturing is helpful to guide rehabilitation progress. Manipulation after revision at 6 weeks is almost expected

Ceramic bearing complications are rare, but can be a catastrophic complication following total hip arthroplasty (THA). Particulate debris from fractured ceramics can cause damage to the hip prosthesis and jeopardise subsequent revision THA. Patients with ceramic fractures can present with sudden onset of pain and dysfunction. Often, the patient will report a noisy hip articulation. Radiographs can range from subtle densities surrounding the hip implant to complete disintegration and loss of sphericity of the femoral head or acetabular liner. Ceramic component fractures should be treated expeditiously. Revision options for failed ceramic components depend on existing component fixation, position, and type. In order to retain the implants, the components must be well fixed, appropriately positioned, and have tapers that are undamaged and can accept current femoral heads. Additionally, an extensile exposure and complete synovectomy are necessary to remove the sharp ceramic particulate debris. Finally, a ceramic ball head should be used to revise a fractured ceramic THA. Newer, alumina composite ceramic ball heads are harder, reliable, and more scratch resistant compared to metal ball heads. However, when retaining the femoral component, a ceramic ball head with a titanium sleeve should be used to prevent subsequent failures. In summary, ceramic bearing complications are rare but catastrophic events. A systematic approach to evaluation and management is necessary to ensure a safe return

Stiffness remains one of the most common, and challenging post-operative complications after TKA. The exact definition of stiffness varies, and patient expectations of post-operative motion vary as well. Pre-operative motion and diagnosis (such as post-traumatic arthritis) can influence post-operative motion, and careful patient counseling about expectations is important. Post-operative stiffness should be evaluated by ruling out infection, evaluating rehabilitation efforts, and careful physical and radiographic examination. Manipulation under anesthesia (MUA) in selected cases can be helpful. The author generally prefers to perform MUA between the 6- and 8-week mark post-operatively. Careful technique is required to minimised the risk of fracture or soft tissue injury. For more chronic stiffness, revision may be indicated, especially if an etiology is identified pre-operatively (for example, an excessively thick patellar resurfacing, an oversized femoral component, gross malrotation, etc.). CT scanning can be helpful for pre-operative evaluation and planning. During revision, thorough synovectomy and release of contractures and ligamentous balancing is performed as required. Careful attention to gap balancing, component rotation, and sizing is critical. Patients should be counseled that the results of revision for stiffness are mixed and somewhat unpredictable unless a clear etiology was found intra-operatively (for example, a grossly oversized femoral component). More frequent post-operative office visits may be helpful to guide rehabilitation progress in these challenging cases

Surgical exposure during revision total knee arthroplasty is the most essential part of the procedure. An appropriate surgical exposure protects the extensor mechanism, facilitates safe implant removal and allows for accurate reimplantation of components and appropriate soft tissue balancing. The pre-operative plan is critical to achieving appropriate exposure in the revision setting. Evaluating the skin and previous incisions and determining range of motion will aid in deciding which exposure technique is most appropriate. The key to exposure in revision total knee arthroplasty is patience. Approximately 90% of revision total knees can be adequately exposed with a standard medial parapatellar arthrotomy, a proximal medial tibial exposure, complete synovectomy and clearing of the medial and lateral gutters. The patella need not be everted in the revision setting and extreme care must be taken to protect the extensor mechanism. In cases where standard exposure techniques are inadequate or may jeopardise the extensor mechanism, a quadriceps snip may be performed. This takes tension off the stiff knee, is easy to repair and does not require limitation of rehabilitation protocols. The tibial tubercle osteotomy is utilised in patients with extreme stiffness and to aid in removal of well-fixed tibial components. General principles include keeping the osteotomy fragment long (8–10 cm) and leaving a lateral periosteal bridge and soft tissue attachment to aid in repair and healing of the fragment. Other techniques such as the quadricepsplasty or V-Y turndown may be utilised but are rarely needed

Juvenile idiopathic arthritis(JIA) is chronic inflammation commonly occurs in early childhood. Recently, biological therapies are used in JIA at the early stage as same as rheumatoid arthritis, due to retain joint cartilage. However, some of young patients have painful knee problems requiring knee replacement. We experienced 4 cases of JIA treated by knee arthroplasty. The average age at surgery was 33.5 years (range, 26–38 years) with a mean follow-up of 9.5 years (range, 5–18 years). We evaluated the knee range of motion and functional outcomes by the Knee Society Score (KSS), implant selection, postoperative complication, surgery of another joint. Mean range of motion improved from 76.3° (0°–120°) at pre-operation to 110.6° (80°–130°) at post-operation (P<0.05). Mean KSS increased from 47.3 ±20.1 preoperatively to 86.9 ±11.1 (P<0.01) at last follow-up and the mean KSS function from 27.5 ±25.9 to 62.5±20.2 at last follow-up (P<0.05). All of the TKAs were cemented, 5 were cruciate-retaining implant designs, whereas 2 TKAs had constrained posterior stabilized implant designs. Patellar resurfacing was undergone in all knees. Bone graft required in 1 knee within severe knee deformity. Complication were occurred in 5 knees. Medial instability in 2 knees. Skin necrosis, MCL avulsion, recurrence of the synovitis are one in each. All cases had polyarticular type. Previous THA had undergone in 5 hips, synovectomy in 3 knees, foot surgery in 2 feet. At latest follow-up, 1 of 8 TKAs (12.5%) had been revised, and had revision of its polyethylene exchange only. Patients with JIA often have valgus alignment with a flexion contracture and poor bone quality is also frequently compromised. Prescribed immunosuppressive medication or biological agents may cause to infection. In our series there were no infection, but some of these need much more soft tissue release because of severe deformity and flexion contracture. TKA survivorship for JIA is inferior to that typically seen in younger patients with osteoarthritis or rheumatoid arthritis. The knee of conservative therapy were often caused to severe functional limitations. Timimg of TKA may be indicated no matter how young the patient is. Extending timing of TKA may leads to worse outcome and postoperative function. But it may be caution that the surgical exposure can be difficult, because of stiffness, flexion contracture, bony deformity, osteopenia

Two-stage treatment of chronically infected TKA is the most common form of management in North America and most parts of the world. One-stage management has pros and cons which will not be discussed in this lecture. There is great variation of techniques and timing and little data to definitively support one technique or timing approach vs. another. Most methods are based on empirical success and logic. At the time of surgery, the first step is removal of infected implants. All metallic implants and cement should be removed. The most common places to leave cement behind inadvertently include patellar lug holes, femoral lug holes, and the anterior proximal tibia behind the tibial tubercle. Formal synovectomy should be performed. The next step is typically antibiotic-impregnated spacer placement. There are pros and cons of dynamic and static spacers with no clear evidence of superiority of one vs. another. Dynamic spacers work satisfactorily with mild to moderate bone loss, but more severe bone loss is usually better treated with static spacers and a cast. Most antibiotic spacers are made of methyl methacrylate cement with addition of high-dose antibiotics. In most cases, doses of 4–8 gm of antibiotics per pack of cement are preferred. The type of dosing depends on the specific antibiotic and the type of cement used. The most common antibiotics used are vancomycin and gentamycin. When the femoral canals have been instrumented, antibiotic-impregnated cement wands are usually placed in the medullary canal, as the medullary canals have been shown to have high risk of residual bacteria being present. The resection interval may vary and there is no clear evidence of a “best” resection interval. Practically speaking, most surgeons use a resection period of 8–16 weeks depending on the type of spacer utilised. During the resection interval, serum markers (ESR and CRP) are followed periodically. One anticipates a decline or normalization of these parameters prior to second stage reimplantation procedure. There has not been a demonstrated advantage to reaspiration of the knee before reimplantation in most circumstances. At the time of reimplantation, the spacers are removed and the knee is redebrided. The key at the time of reimplantation is to obtain good implant fixation but to also balance this with the potential for manageable extraction of the implants at some later date. Good implant fixation is important because failure rates due to mechanical failure are approximately equal to those of failure due to reinfection by 10 years. It is important to remember that reinfection risk is at least 10% by ten years, and therefore extractability of implants is also important. Post-operative management typically includes IV antibiotics, followed by oral antibiotics until final intra-operative cultures are available. The results of two-stage reimplantation are reported in many series. Most show approximately 85–95% rate of successful eradication of infection in the first five years. Reinfections, often with different organisms, may occur even late after reimplantation. By ten years after surgery survival free of mechanical failure and infection in most series drops to 80% or less due to recurrent infections and mechanical failures