The accurate assessment of compartmental involvement in degenerative arthritis of the knee is important when planning operative treatment. Standard radiographic techniques often fail to define the degree of involvement of the less affected tibiofemoral compartment. The use of stress radiography in the preoperative assessment of 30 knees with degenerative arthritis is described and the radiographic findings correlated with the changes found at arthrotomy

1. Degenerative arthritis has been produced consistently in adult rabbits by the injection of the proteolytic plant enzyme papain into the hip joint. Arthritic changes were recognisable radiographically after six weeks. 2. A progression of changes occurred, from loss of acid mucopolysaccharide staining in the matrix, fibrillation, fissuring and erosion of articular cartilage with death of chondrocytes in the weight-bearing areas, to secondary bony changes of subchondral sclerosis, occasional cysts and osteophyte formation. 3. Synovial inflammation occurred with accumulation of cartilage and bone debris in the inferior capsule and later capsular thickening. 4. It is suggested that this arthritis is sufficiently similar to human osteoarthritis to be useful as a model for further studies of the pathogenesis of the disease and the effects of different methods of treatment

Degenerative arthritis of the elbow is a poorly recognised condition, usually seen in a middle-aged man with an occupation or activity which involves the repetitive use of his dominant arm. Flexion contracture and pain at terminal extension are common presenting features. Fifteen patients were reviewed at a mean of 33 months after debridement by ulnohumeral arthroplasty. Fourteen had good relief of pain, elbow extension had improved by an average of 11 degrees and elbow flexion by 10 degrees. On an objective scale 12 of the 15 patients had good or excellent results and 13 (87%) felt that they were improved by the operation

This paper presents the first report of a prospective study to assess the outcome of using coregistration localisation and selective arthrodesis in chronic midfoot degenerative arthritis. In a previous report from Cambridge (. J Bone Jt Surg [Br]. 1998. ; . 80B. :. 777. ), a new coregistration imaging technique in the foot was described, using superimposed X-rays and technetium scintigram and showing significantly higher anatomical localisation of active joint disease than either alone. Nineteen consecutive patients over a three-year period (1996–9) with severe midfoot joint pain and disability of over six months’ duration underwent coregistration imaging followed by selective arthrodesis. The procedures involved 17 patients with one-level single or multiple fusions of the metatarsocuneiform, metatarsocuboid or naviculocuneiform joints, and two patients with two-level multiple fusions. Pain and functional assessments were recorded pre-operatively and at one and at two to four years postoperatively using the American Orthopaedic Foot and Ankle Society Midfoot Scoring System. Bone union was determined clinically and with X-rays. Results showed fusions in all 19 patients between 10 and 15 weeks. Three K-wires and one screw required removal for later prominence and there was one delayed wound healing. Pian and functional scores showed significant differences between the pre- and post-operative and one year measurements, and less between the one year and two to four year scores. This preliminary study concludes that there is a high correlation between the coregistration localisation of the midfoot degenerative arthropathies and the successful results of selective fusion of these joints for the one to four year follow-up period

Purpose: The purpose of the study was to evaluate the clinical and radiological results of Copeland cementless surface replacement arthroplasty (CSRA) applied in patients with two main indications. Patients and Methods: The study was conducted on fifty shoulders in fifty patients between 2003 and 2005; 17 patients suffered from rotator cuff pathology. The patients were prospectively followed up clinically and radiologically for a mean of 12.7 months (range, 6–30 months). There were 30 female and 20 male shoulders. The mean age was 66.63 years (range, 21–85). The mean operative time was 44.6 minutes (range, 29–62 minutes). The clinical assessment was performed with the Constant score. Results: The constant score significantly improved from a mean of 15.52 points preoperatively to 57.02 points postoperatively. Of the patients, 96% considered the shoulder to be much better or better as a result of the operation. The Constant-Score improved in the group with degenerative arthritis from 16.32 point pre- to 62.25 postoperatively. In rotator cuff arthropathy the score improved from 14.19 to 53.06. Radiologically, the humeral offset, the lateral gleno-humeral offset (coracoid base to the greater tuberosity) as well as the acromiohumeral distance were significantly increased. No intra-or postoperative complications encountered. Conclusion: We conclude that the shoulder surface replacement arthroplasty allows good conservation of the bone stock and avoiding the complications encountered with the stemmed prostheses. In patients with rotator cuff arthropathy there are two main indications:. - patients below the age of 70, in order to avoid complications of the reverse prosthesis. - patients with still a goof active range of motion

Aims. The aim of this study was to investigate the feasibility of application of a 3D-printed megaprosthesis with hemiarthroplasty design for defects of the distal humerus or proximal ulna following tumour resection. Methods. From June 2018 to January 2020, 13 patients with aggressive or malignant tumours involving the distal humerus (n = 8) or proximal ulna (n = 5) were treated by en bloc resection and reconstruction with a 3D-printed megaprosthesis with hemiarthroplasty, designed in our centre. In this paper, we summarize the baseline and operative data, oncological outcome, complication profiles, and functional status of these patients. Results. Preparation of the prosthesis was a mean of 8.0 days (SD 1.5), during which time no patients experienced tumour progression. The mean operating time and intraoperative blood loss were 158.1 minutes (SD 67.6) and 176.9 ml (SD 187.8), respectively. All of the prostheses were implanted successfully. During a mean follow-up of 25.7 months (SD 7.8), no patients died, but four had complications (two superficial wound problems, one temporary palsy of radial nerve, and one dislocation). No aseptic loosening, structural failure, infection, heterotopic ossification, or degenerative arthritis was seen in this study. The mean flexion of the elbow was 119.6° (SD 15.9°) and the mean extension lag was 11.9° (SD 13.8°). The mean Musculoskeletal Tumor Society 93 score and Mayo Elbow Performance Score were 28.4 (SD 0.9) and 97.7 (SD 4.4), respectively. Conclusion. The custom-made, 3D-printed megaprosthesis with hemiarthroplasty is a feasible option for functional reconstruction after resection of a tumour in the distal humerus or proximal ulna. Cite this article: Bone Joint J 2022;104-B(6):747–757

1. The technique of the intra-articular surgery employed by the late Mr K. H. Pridie for osteoarthritis of the knee is described.

2. The results of sixty-two operations in sixty patients are analysed. The results in forty-eight knees (77 per cent) were pleasing to the patient. Forty knees (64 per cent) were rated as good at review.

3. The operation is most suitable for relatively active healthy people whose disability warrants a comparatively painful operation and lengthy rehabilitation.

4. The operation was most successful for relieving pain and improving stability. Functional improvement was less.

5. Results were remarkably permanent. The knees showed little tendency towards further deterioration.

6. Most of the bad results were associated with removal of the patella. A possible technical reason for this has been discussed.

Introduction

Arthritic knees requiring total knee replacement may present with additional deformities located along the femur or tibia away from the articular region. These deformities may be congenital, developmental, associated with metabolic bone disease, or acquired as a result of malunited fractures or previous advocated for arthritic knee with ipsilateral extra-articular deformity.

Goodfellow & Bullough (1968) first described the pattern of articular cartilage wear in the elbow. More recent post mortem studies have shown that advanced degenerative changes can develop in the radio-capitellar (lateral) compartment of elbow joints of elderly subjects in which the humero-ulnar (medial) compartment remains remarkably well preserved. The significance of this post-mortem findings,in an elderly population, with unknown elbow symptom logy, who died from diverse causes, is unknown. There has been no clinically based,in vivo,study of this subject. Our study would support these observations, but indicates that symptomatic degenerative change occurs at a much earlier age than had previously been thought.

We have reviewed the findings in a consecutive series of 117 elbow arthroscopies performed on patients with elbow pain resistant to conservative treatments (age range 21–80 years: mean age 51 years). We documented established degenerative changes involving articular cartilage in 68 patients (59%). In this group we found that in 60 patients (88%) the degenerative changes were confined to the lateral compartment and contrasted with normal appearances of the articular cartilage of the medial compartment.

The findings presented in this work are in full agreement with previous work on the articular wear and biomechanics of the elbow joint. Previous studies which have been on cadaveric specimens, with findings of uncertain symptomatic relevance. To our knowledge, this finding has not previously been demonstrated in a symptomatic, young population. Unicompartmental lateral degeneration of the elbow is therefore a real clinical entity rather than a interesting post mortem finding. As such, it demands consideration in terms of investigation, diagnosis and treatment. It is likely that in the past, many patients have been misdiagnosed as having chronic lateral epicondylitis.

We consider that lateral compartment degenerative change is a distinct clinical entity. It begins in relatively young patients in whom the x ray appearance may be normal or near normal and is often diagnosed as lateral epicondylitis. Our observations taken together with the reported post mortem studies indicate that primary osteoarthritis of the elbow begins in the lateral compartment of the joint and may remain confined to the lateral compartment throughout life. We believe that new treatment strategies need to be developed specifically for patients with primary osteoarthritis as opposed to degenerative joint disease due to other causes.

Abstract: Although the unconstrained pyrocarbon prosthesis (Ascension®) has been presented as a new alternative in the treatment of idiopathic arthritis of the proximal interphalangeal joint of the hand a few years ago, there is still a lack of studies analyzing the results of this implant.

In this study 10 patients (13 implants), that were tretated with this type of prosthesis between february 2002 and january 2005 were studied. All but one patient were satisfied with the postoperative situation and would agree to another operation.

A significant pain reduction was observed. The average ROM was 58degrees. Five patients demonstrated a free extension, two patients had a swan neck defomity, which could be actively compensated for, and the remaining six patients had an extension deficit of 30–45degrees. The average flexion was 76° (+/−12°).

X-ray examination was unremarkable in eight patients with a regular position of the endoprosthesis. However, in five patients significant radiolucent lines (> = 1mm) were observed. So far, a luxation of the prosthesis has not occurred and all implants are still in-situ. However, a dorsal tenoarthrolysis had to be performed in 3 patients.

The results of this study show a high rate of patient satisfaction with a significant pain reduction. The radiological results have to be closely monitored in the future.

Long-term results with a higher number of patients are necessary. A central registry for finger implants is recommended.

Between 1990 and 1996 we performed 20 consecutive ulnohumeral arthroplasties for primary osteoarthritis of the elbow.

The outcome was assessed using the Disabilities of Arm, Shoulder and Hand Score (DASH) and the Mayo Elbow Performance Score (MEPS) at a mean follow-up of 75 months (58 to 132). There were excellent or good results in 17 elbows (85%) using the DASH score and in 13 (65%) with the MEPS (correlation coefficient 0.79). The mean fixed flexion deformity had improved by 10° and the range of flexion by a mean of 20°.

In 16 elbows (80%) the benefits of surgery had been maintained, and of 16 patients working at the time of operation, 12 (75%) had returned to the same job.

There was no correlation between radiological recurrence of degenerative changes and the amount of fixed flexion deformity, the flexion arc, or the elbow scores.

We reviewed 31 of 33 consecutive patients with intra-articular fractures of the knee at 6 to 22 years (average 14). Of these, 77% had excellent or good results; the others had various degrees of degenerative osteoarthritis. There was no significant difference between the results after surgical or conservative treatment. Secondary degeneration was not related to cause or type of fracture, but its incidence increased with the patient's age at the time of injury, though not with the length of follow-up. Early mobilisation appeared to be beneficial in preventing later degenerative changes.

The long term results of the ulnohumeral arthroplasty have not previously been reported using a recognised elbow scoring system.

Kashiwagi reported his results in 1986 but no validated scoring system was used in the publication. Morrey in 1992 evaluated his results using the Mayo Elbow Performance Score but the mean follow-up interval was only 33 months.

Between 1990 and 1996 twenty consecutive ulnohumeral arthroplasties were performed for primary degenerative disease of the elbow.

Outcome assessment using the DASH questionnaire and the Mayo Elbow Performance Score was taken at a mean follow-up of 75 months (range 58 to 132). Excellent or good results were identified in 85% (17/20) using the DASH questionnaire, and 65% (13/20) on assessment with the Mayo Elbow Performance Score (correlation coefficient 0.79).

Eighty percent (16/20) felt that the benefits of surgery had been maintained, and of those working at the time of surgery, 75% (12/16) were still employed in the same vocation.

There was no correlation between radiographic recurrence and the degree of fixed flexion deformity, flexion arc or elbow scores.

We describe the mid-term clinical results of the surgical treatment of primary degenerative arthritis of the sternoclavicular joint in eight women. They had not responded to conservative treatment and underwent a limited resection arthroplasty. For pre-and postoperative clinical evaluation we used the Rockwood score for the sternoclavicular joint. Postoperatively, the Constant score was also determined. The mean follow-up was 31 months (10 to 82). The median Rockwood score increased from 6 to 12.5 points. The median postoperative Constant score was 87 (65 to 91). Four patients had an excellent, three a good, and one a poor result. All patients were pleased with the cosmetic result. Resection arthroplasty is an effective and safe treatment for chronic, symptomatic degenerative arthritis of the sternoclavicular joint with a high degree of patient satisfaction

Reorientating pelvic osteotomies are performed to improve femoral head coverage and secondary degenerative arthritis. A rectangular triple pelvic innominate osteotomy (3PIO) is performed in symptomatic cases. However, deciding optimal screw fixation type to avoid complications is questionable. Therefore, this study aimed to investigate the biomechanical behavior of two different acetabular screw configurations used for rectangular 3PIO osteosynthesis. It was hypothesized that bi-directional screw fixation would be biomechanically superior to mono-axial screw fixation technique. A rectangular 3PIO was performed in twelve right-side artificial Hemi-pelvises. Group 1 (G1) had two axial and one transversal screw in a bi-directional orientation. Group 2 (G2) had three screws in the axial direction through the iliac crest. Acetabular fragment was reoriented to 10.5° inclination in coronal plane, and 10.0° increased anteversion along axial plane. Specimens were biomechanically tested until failure under progressively increasing cyclic loading at 2Hz, starting at 50N peak compression, increasing 0.05N/cycle. Stiffness was calculated from machine data. Acetabular anteversion, inclination and medialization were evaluated from motion tracking data from 250-2500 at 250 cycle increments. Failure cycles and load were evaluated for 5° change in anteversion. Stiffness was higher in G1 (56.46±19.45N/mm) versus G2 (39.02±10.93N/mm) but not significantly, p=0.31. Acetabular fragment anteversion, inclination and medialization increased significantly each group (p≤0.02) and remained non-significantly different between the groups (p≥0.69). Cycles to failure and failure load were not significantly different between G1 (4406±882, 270.30±44.10N) and G2 (5059±682, 302.95±34.10N), p=0.78. From a biomechanical perspective, the present study demonstrates that a bi-directional screw orientation does not necessarily advantageous versus mono-axial alignment when the latter has all three screws evenly distributed over the osteotomy geometry. Moreover, the 3PIO fixation is susceptible to changes in anteversion, inclination and medialization of the acetabular fragment until the bone is healed. Therefore, cautious rehabilitation with partial weight-bearing is recommended

Introduction. AlloStem/Cellular Bone Allograft and autologous bone graft are accepted methods for managing hindfoot degenerative arthritis. The purpose was to evaluate outcomes of AlloStem and autograft in subtalar arthrodesis and compare overall fusion rates. Methods. This study was conducted in IRB compliance. Patients between 18–80 years who qualified for a subtalar fusion were randomized 1:1 to AlloStem or autologous graft. The AOFAS hindfoot ankle scale, FFI-R and SF-12 were collected pre-operatively, 6 weeks, 3 & 6 months, 1 and 2 year. Weight-bearing 3-view ankle X-rays were done at the same intervals. A CT scan was obtained at 6 months. Results. 140 patients were enrolled; 124 patients had surgery(60-AlloStem and 64-Control). Withdrawals included 14 voluntarily before surgery and 2 intra-operative failures. 19 were lost to follow-up. Mean age for AlloStem was 56.69(20.3–79.6) and Autograft was 54.60(20.74–80.07). 59 AlloStem patients completed their 6 month visit and 45 completed 2 years. AOFAS score improved: 40.02 at pre-op to 72.16(6 mo) to 79.51 at 1 year and 80.38 at 2 year. SF-12 improved 58.29 at pre-op to 65.67 at 6 month and 71.59 at 2 year. FFI-R improved 236.88 at pre-op to 203.53 at 6 month 149.93 at 2 year.60 Autograft patients completed their 6 month visit and 51 patients completed their 2 year. AOFAS score improved 42.89 at pre-op to 75.67 (6 mo) to 79.75 at 1 year and 78.62 at 2 year. Autograft SF-12 improved 60.55 at pre-op to 70.40 at 6 month and 75.26 at 2 year. Autograft FFI-R improved 217.16 at pre-op to 166.77 at 6 month and 145.43 at 2 year. AlloStem patients had a mean posterior fusion rate of 28.9% at 6 months whereas the Autograft had 46.3%(p=.049). Non-union rates were AlloStem(9/57)(15.7%) whereas Autograft was 3/60(5%). Conclusion. AlloStem trended to be inferior to Autologous graft

The rotator cuff tendinopathy is one of the most common shoulder problems leading to full-thickness rotator cuff tendon tear and, eventually, to degenerative arthritis. Recent research on rotator cuff tendon degeneration has focused on its relationship to cell death. The types of cell death known to be associated with rotator cuff tendon degeneration are apoptosis, necrosis, and autophagic cell death. The increased incidence of cell death in degenerative tendon tissue may affect the rates of collagen synthesis and repair, possibly weakening tendon tissue and increasing the risk of tendon rupture. The biomolecular mechanisms of the degenerative changes leading to apoptotic cell death in rotator cuff tenofibroblasts have been identified as oxidative-stress-related cascade mechanisms. Furthermore, apoptosis, necrosis, and autophagic cell death are all known to be mediated by oxidative stress, a condition in which ROS (reactive oxygen species) are overproduced. Lower levels of oxidative stress trigger apoptosis; higher levels mediate necrosis. Although the signaltransduction pathway leading to autophagy has not yet been fully established, ROS are known to be essential to autophagy. A neuronal theory regarding rotator cuff degeneration has been developed from the findings that glutamate, a neural transmitter, is present in increased concentrations in tendon tissues with tendinopathy and that it induces rat supraspinatus tendon cell death. Recent studies have reported that hypoxia involved in rotator cuff tendon degeneration. Because antioxidants are known to scavenge for intracellular ROS, some studies have been conducted to determine whether antioxidants can reduce cell death in rotator cuff tendon-origin fibroblasts. The first study reported that an antioxidant has the ability to reduce apoptosis in oxidative-stressed rotator cuff tenofibroblasts. The second study reported that antioxidants have both antiapoptotic effects and antinecrotic effects on rotator cuff tendon-origin fibroblasts exposed to an oxidative stimulus. The third study reported that an antioxidant has antiautophagic-cell-death effects on rotator cuff tendon-origin fibroblasts exposed to an oxidative stimulus. The fourth study reported that glutamate markedly increases cell death in rotator cuff tendonorigin fibroblasts. The glutamate-induced cytotoxic effects were reduced by an antioxidant, demonstrating its cytoprotective effects against glutamate-induced tenofibroblast cell death. The fifth study reported that hypoxia significantly increases intracellular ROS and apoptosis. The hypoxia-induced cytotoxic effects were markedly attenuated by antioxidants, demonstrating their cytoprotective effects against hypoxia-induced tenofibroblast cell death. In conclusion, antioxidants have cytoprotective effects on tenofibroblasts exposed in vitro to an oxidative stressor, a neurotransmitter, or hypoxia. These cytoprotective effects result from antiapoptotic, antinecrotic, and antiautophagic actions involving the inhibition of ROS formation. These findings suggest that antioxidants may have therapeutic potential for rotator cuff tendinopathy. Further studies must be conducted in order to apply these in vitro findings to clinical situations

Aim: Investigations on human hyaline cartilage of late stage degenerative arthritis showed that the vascular derived endothelian growth factor (VEGF) seems to play a role in the development of degenerative arthritis. The current study was designed to evaluate the expression of VEGF on chondrocytes of hyaline cartilage in the time course of degenerative arthritis. Methods: In twelve white new-zealand-rabbits the anterior cruciate ligament was resected to create an anterior instability of the knee. In twelve control rabbits only a sham operation without resection of the ACL was done. Another four animals have not been operated at all (0 weeks). Four animals of each group were sacrificed at three, six and twelve weeks each. After opening of the knee joint, the degenerative arthritis was macroscopically graded and the hyaline cartilage of the load bearing area was evaluated histologically according to Mankin and by immunostaining for VEGF. Results: The macroscopic and histological grade of degenerative arthritis according to Mankin showed a positive linear correlation to the time after surgery. The scores of the control group were constant in the time course. In the cartilage of the untreated animals (0 weeks) an average of 12 percent (SD 2.6) VEGF-positive chondrocytes were found. After 3 weeks the trial group (17.6%; SD 5.7) as well as the control group showed a significant increase (16.2%; SD 4.7). After 6 weeks the value in the control group dropped to normal (11.5%; SD 5.9) and remained constant after 12 weeks (11.6%; SD 3.3). In the trial group the percentage of VEGF positive chondrocytes rose steadily (19.4%; SD 4.6 after 6 weeks; 21.3%; SD 5.4 after 12 weeks). There was a positive linear correlation between the percentage of VEGF positive cells and the Mankin score (r=0.767; p< 0.01) and the macroscopic score (r=0.518; p=0.02). Conclusion: The current study shows for the first time an in-vivo increase of VEGF expression on chondrocytes in the time course of osteoarthritis, which is dependent on macroscopic and histological grades. Further studies are needed to evaluate whether this pattern applies to human beings and whether new treatment approaches could evolve from this knowledge

Introduction. Leg length discrepancy (LLD) is a common sequalae of limb reconstruction procedures. The subsequent biomechanical compensation can be directly linked to degenerative arthritis, lower back pain, scoliosis and functional impairment. It becomes particularly problematic when >2cm, established as a clinical standard. This two-arm experimental study assesses how reliable an iPhone application is in the measurement of LLD at different distances in control and LLD patients. Materials and Methods. 42 participants were included in the study, divided evenly into 21 control and 21 LLD patients. A standardised measurement technique was used to obtain TMM and iPhone application measurements, taken at a distance of 0.25m, 0.50m and 0.75m. Results. The mean discrepancy of iPhone-based measurements in the control group was 1.57cm, 1.59cm and 2.19cm at 0.25m, 0.50m and 0.75m respectively. This compares to measurements in the LLD cohort with a mean discrepancy of 1.71cm, 1.85cm and 2.19cm. The overall mean discrepancy of iPhone data was 1.78cm in the control cohort compared to 1.92cm in the LLD cohort. Conclusions. Results suggest that the iPhone application can be used to identify clinically significant leg length discrepancies. At 0.75 metres anomalous results become more prevalent and the accuracy of the application appears to decline. The results also suggest the application is slightly more accurate in the control group, nevertheless, in distances up to 0.50 metres the mean discrepancy sits within the 2cm standard of clinically significant LLD

Introduction This study was conducted in order to evaluate the patterns of utilization of arthroscopic knee debridement for the treatment of degenerative arthritis and the five years outcome following an initial arthroscopic procedure at our institution. Methods This is a retrospective study on all patients with degenerative arthritis of the knee who had their first arthroscopic debridement between 1992 and 1995, and had a follow-up of at least five years or ended up with total knee replacement (TKR). Patients with other prior surgery to the knee were excluded. The patients were divided into four groups based on the first arthroscopic finding using the Outerbridge grading system (Stage I: Softening, II: Fibrillation, III: Fragmentation, IV: Eburnation). The clinical status following the first arthroscopy and during the last follow-up were evaluated. The duration between the first arthroscopic debridement and TKR were also taken into account. Two hundred and two cases were included in the study which consists of 114 male and 88 female with mean age of 58.7 years. The mean follow-up was 5.4 years. There were 15 cases in stage I, 96 in stage II, 58 in stage III and 33 in stage IV. Results Following the first arthroscopic debridement, 93.7% of patients in stage I and II became asymptomatic compared to 26.4% in stage III and in IV where 60.4% still presented with recurrent symptoms. On the last follow-up, 18.9% in stage I and II had total knee replacement done compared to 78.0% in stage III and IV. The mean duration between the first arthroscopic debridement and TKR was 8.6 years in stage II, 3.3 years in stage III and 1.5 years in stage IV. Conclusions This study has shown that given the proper selection of patients and the correct stage of degenerative arthritis, arthroscopic debridement can still be a successful palliative, temporizing treatment for the osteoarthritic knee. It is of utmost importance that the patient’s pre-operative expectations have to be clearly objectified