Purpose of study

Internal rotation (IR) contracture of the shoulder is a frequent complication of obstetric brachial plexus injury, even in the face of full neurological recovery. Surgical procedures to treat this complication include tendon transfers, capsular release and osteotomies. We compared the outcomes in patients who had arthroscopic release only and those who also underwent a tendon transfer.

Methods

We retrospectively reviewed the clinical records of all patients with OBPI presenting to our unit in the years 2002–2012 who underwent surgical procedures for the treatment of an IR contracture of the shoulder. Increase in range of external rotation (ER) in adduction and abduction intra-operatively was recorded. At follow-up, active ER, the Mallet score, presence of an ER contracture and the “drop-arm” sign was recorded.

Aims of study

To assess and compare the functional, radiological and cosmetic results as well as patient satisfaction in patients treated with the IMN Device Vs Volar Locking Plate

Method

All patients who presented to our institution with extra articular distal radius fractures and met the inclusion criteria were invited to take part in the study. The patients were randomly allocated to two groups, those who underwent intramedullary (IMN) distal radius fixation using the Sanoma Wrx Distal radius nail and those who underwent fixation using a volar locking plate. The patients were then followed up at 2 weeks, 6 weeks, 3 months, 6 months and 1 year. The radiological parameters, ie radial height, inclination and tilt were compared as well as the functional outcomes by means of DASH score. The range of motion of the wrist was compared as well as the scar size. Complications were reviewed.

Purpose of Study

To determine the clinical presentation and management of patients with traumatic finger amputations.

Methods

Patients who presented to the emergency unit of a major tertiary academic hospital were reviewed prospectively. A data collection form indicating the mechanism of injury and the treatment given among other parameters was completed for each patient. Data was entered into Microsoft Excel spread sheets and was then imported into Statistica software version 11.0. Parametric, continuous variables were described using means and standard deviations. Medians and interquartile ranges were used for non-parametric data. Categorical variables were described using frequencies and percentages

Aim

To compare radiological and clinical outcomes between triceps-detaching and triceps-sparing approaches in total elbow arthroplasty, with specific focus on cementing technique and post-operative range of motion.

Methods

A retrospective review was completed of medical records and radiographs of 56 consecutively managed patients who underwent a primary total elbow arthroplasty between 2000 and 2012 at a tertiary hospital. Rheumatoid Arthritis was the predominant pathology (47/56). Data analysed included patient demographics, range of motion pre-operatively and at various stages post-operatively, approach utilized, operative time and complications. Cementing technique was graded as adequate, marginal or inadequate according to Morrey's criteria.

Introduction

Resurfacing of the glenohumeral joint has gained popularity since its first introduction in 1958. Advantages of resurfacing over conventional shoulder arthroplasty include preservation of humeral bone stock, closer replication of individual anatomy, reduction of periprosthetic fracture risk, non-violation of medullary canal, and ease of revision to a stemmed component if needed.

Materials and Methods

We reviewed a group of patients with arthrosis of the glenohumeral joint who underwent humeral resurfacing, and who were at a minimum of two years post surgery. From January 2000 to March 2011, 51 humeral resurfacing procedures were performed in 49 patients. Patients were contacted for review, and assessed using patient reported outcome measures. An Oxford Shoulder score as well as a subjective satisfaction and outcome questionnaire was completed, as well as details regarding further surgery or revision. 2 patients had died, 11 patients were not contactable, and in 4 the medical files had been lost. In the remaining 32 shoulders, the average follow-up was 5.9 years. The mean age at time of surgery was 62.3 years (range 36 to 84).

Introduction

Hypoplasia of the glenoid is a rare condition caused by incomplete ossification of the postero-inferior aspect of the developing glenoid. It may be isolated or associated with a more generalised condition. The clinical symptomatology is variable depending on the age at time of presentation.

Materials and Methods

We performed a retrospective chart review of patients who presented with shoulder complaints, and in whom a radiographic diagnosis of glenoid hypoplasia had been made. From January 2002 to December 2012, 8 patients (9 shoulders) with radiological signs of glenoid hypoplasia were identified. The mean age at presentation was 39 years (range 23 to 77) and the mean symptom duration was 12.5 months (range 1 to 48).

Methods

45 patients with complex fractures of the calcaneus were included in this prospective study, which was undertaken from July 2003 to December 2005. The fracture classification of Essex-Lopresti was used. We also observed the extent of secondary fracture lines extending from the primary shear line (on axial and external oblique plain radiographs) to establish comminution. The external oblique view for subtalar joint was performed with the patient supine, the knee at about 60 degree of flexion and the limb rotated externally 45 degree with a vertical X ray beam. All of these patients were managed by an external fixator using the principle of ligamentotaxis. Patients were evaluated by AOFAS.

Results

We identified two broad patterns of secondary lines on plain X-rays:

There were 20 cases of tongue type and 25 of joint depression type fracture pattern by the Essex-Lopresti classification. Forty two (93.4%) patients had fractures with posterior secondary fracture line and 3 (6.7%) patients had anterior secondary lines.

The calcaneo-cuboid type of anterior secondary line pattern was present in 2 (4.5%) cases, and the plantar type in only 1 (2.5%) case.

We observed posterior secondary line Type A pattern in 2 (4.5%) cases, depression / central depression type B in 20 (44.5%) cases, tongue shaped Type C pattern in 16 (36.5%) cases and Type D severely comminuted fracture line pattern in 4 (8.7%) cases.

Background

Lateral ligament injuries of the ankle are common. They account for up to 50% of all sporting injuries. Recovery times vary, leading to time away from sport and training for the professional athlete. Predicting this time is important for the treating surgeon, the athlete and the rehabilitation team. This can be difficult as associated ankle injuries occurring at the time of the trauma may alter recovery and rehabilitation.

Aim

To compare the time to return to training and sports of isolated lateral ligament injuries with more complex injuries of the ankle treated surgically and to evaluate if lateral ligament repair is safe and effective in the professional athlete.

Study design: Case series; level of evidence 4

Introduction

Fixation of the distal fibula in conjunction with ankle fractures has not changed over the last 50 years. The complication rate of these fixation techniques is as high as 30%. The fibula nail is an alternative method of fixation and uses a minimal invasive technique. This technique preserves soft tissue compared to previous techniques used, and fewer soft tissue complications.

Method

We reviewed the preliminary results of 178 patients with unstable Weber B and C ankle fractures that were operated on in our unit between January 2012 and February 2013. We used the Acumed fibular nail for reduction and fixation of the lateral malleolus. Using the nail we had significant reduction in our operating time. Patients were discharged one day post operation without any POP and partial weight bearing on crutches. Various parameters were measured on all the follow- up x-rays and assessed for incongruencies compared with the normal ankle. These parameters were medial clearspace, talo-crural angle, talar tilt and fibular length. No patients thus far have had any loss of fixation. The Olerud and Molander score was used at three month and six month follow up.

Purpose of study

Computerised Tomographic Angiography (CTA) is less invasive than conventional angiography. It is our perception that CTAs are being requested and performed too frequently at our institution without correct indications. We assessed the number of CTAs that were done, the percentage of vascular injuries sustained and whether correct indications were followed when requesting CTAs.

Methodology

A review of records of the radiology department to determine the number of CTAs done for suspected extremity vascular injuries from January to December 2012. Inclusion criteria were CTAs performed during this period for suspected vascular injuries in fractures and dislocations and extremity gunshot wounds.

A retrospective chart review was performed to determine the mechanism of injury, clinical picture (pulses, temperature, capillary refill and neurology), indications for and results of the CTA.

Aims

Comparison of the outcome between the supine or prone positioned child with a supracondylar humerus fracture by measuring anaesthetic and operating time, functional outcomes and complications.

Methods

All children with isolated Gartland 2 and 3 supracondylar humerus fractures were who were admitted to our institute, were asked to participate in the the study. For surgery, the participating children were either operated on in a ‘supine’ or ‘prone’ position. The children were randomly allocated to either the ‘supine’ or ‘prone’ position. The fractures were preferably treated by closed reduction and percutaneous pinning with k-wires. However, if the fracture proved difficult to reduce, we proceeded to open reduction via medial and lateral approach. All fractures were stabilized with one medial and one lateral k-wire. The children were immobilized in a reinforced above elbow back-slab. Total anaesthetic and surgical time were meticulously recorded. Patients were followed up in our outpatient clinic at one week, four weeks (at which time the k-wires were removed). Three months post operatively, elbow extension, flexion and total range of movement was assessed in all children. Results Twenty children with isolated Gartland 2 and 3 supracondylar humerus fractures were included in this study. Nine children (5 ± 1 years, 7 boys and 2 girls) were operated on in a prone position, while 11 children (6 ± 2 years, 10 boys and 1 girls) were operated on in a supine position.

Purpose of study

Pin tract infection is a common complication with the use of circular external fixators. HIV infection itself is frequently quoted as a relative contra-indication for the use of circular external fixators for complex trauma and limb reconstruction in HIV seropositive individuals.

Methods

Between July 2008 and December 2012, 286 patients were treated with circular external fixators at our tertiary level government hospital. A retrospective review was undertaken to compare the rate and severity of pin tract sepsis in HIV seropositive and seronegative patients.

Purpose

We aim to determine the amputation rate and identify predictors of outcome in patients with tibial fractures and associated popliteal artery injuries at a level 1 trauma unit draining a large geographical region.

Material and methods

All patients with popliteal artery injuries and tibial fractures treated at a level 1 trauma unit between 1999 and 2010 were assessed retrospectively regarding amputation rates and prognostic factors and tested for significance with a Z-test of proportions.

Purpose of Study

Bicondylar tibial plateau fractures are serious injuries to a major weight bearing joint. These injuries are often associated with severe soft tissue injuries that complicate the surgical management. This retrospective study evaluates the management of these high-energy injuries with the use of limited open reduction and fine wire circular external fixation.

Methods

Between July 2008 and June 2012, 54 consecutive patients (19 females and 35 males) with high-energy tibial plateau fractures were treated at our tertiary level government hospital. All patients were treated with limited open reduction, and cannulated screw fixation combined with fine wire circular external fixators as the definitive management. The records of these patients were reviewed.

Introduction

We conducted a retrospective study of 61 patients, suffering from osteosarcoma, who presented to the CMJAH tumour Unit between 2007 and 2011.

Results

The average time to presentation to the unit, post-onset of symptoms, was 4.5 months. Most patients, 43/61 (70%), presented initially to a hospital or clinic; only 3/61patients (5%) presented first to traditional healers and 15/61 (25%) to a GP. 16 patients (26%) came from other South African provinces and 3 patients (5%) were international. 3 Patients (5%) presented with a pathological fracture. 3/61 (5%) patients were HIV positive, 8 unknown and the rest were HIV negative.

A standard osteosarcoma work-up was performed. 4 patients (7%) were Enneking Stage 2A, 41 patients (67%) were Stage 2B and 16 patients (26%) presented with metastases (Stage 3). Biopsy was performed on average of 3 weeks post-presentation (delay largely due to MRI).

Surgery was undertaken in 46 patients (75%), with the aim of achieving wide local resection margins: 13 (21%) limb salvage procedures and 33 (79%) limb ablations were performed. 4 patients refused further treatment. 54/57 patients (95%) underwent chemotherapy and, of these, 44 (81%) underwent a neo-adjuvant chemotherapy protocol and 2 patients (4%) received post-adjuvant chemotherapy only. 19/61 patients (31%) defaulted follow-up: of these 19 patients, 15 (79%) were amputees, 1 (5%) was a limb salvage patient and 4 (16%) were un-operated.

Two patients developed local recurrence: 1 was treated with amputation & the other with further excision. Palliative Radiotherapy was administered to 2 patients.

In March 2013, 41 patients were contactable. Of these, 17/41 (41%) were alive and of the surviving 17 patients, 9 (81%) were limb salvage patients and 6 (38%) were amputees. Of the 12 patients, who had initially presented with metastases, only I patient (8%) was alive. Only 1 of the 3 patients, who initially presented with pathological fracture, was traceable and alive.

NO DISCLOSURES

Introduction

A previous study in South Africa showed the prevalence of HIV related osteo-articular sepsis in children to be around 20% with a high prevalence of Streptococcus pneumoniae (38%) in HIV positive patients. This initial study was conducted at the same time that the polyvalent S pneumoniae vaccine was introduced to the EPI in South Africa (2009). The aim of the current study was to review the epidemiology of osteo-articular infections at two hospitals after the introduction of this vaccine.

Methods

A retrospective review of patients presenting to two hospitals, between July 2009 and January 2013, with acute osteo-articular sepsis and pus at arthrotomy. The NHLS laboratory results were reviewed for microscopy, culture and sensitivity as well as white cell count (WCC), C reactive protein (CRP) and erythrocyte sedimentation rate (ESR).

Purpose of the study

To evaluate the outcome of the Modified French osteotomy for the correction of cubitus varus resulting from a supracondylar distal humerus fracture in children.

Description of methods

A retrospective review of 90 children, aged 3 to 14, who underwent a modified French osteotomy between 1986 and 2012 for the correction of cubitus varus as a result of a supracondylar distal humerus fracture. Case notes and radiographs were reviewed. The carrying angle was measured clinically and radiologically pre-operatively, post-operatively and at latest follow up. Comparison was made with the unaffected side. The outcome was graded as good if the correction of the carrying angle was within 5 degrees of the unaffected side, satisfactory if the correction was more than 5 degrees of the unaffected side but cubitus valgus was restored and poor if there was persistence of cubitus varus post correction. Any intra-operative and post-operative complications were documented.

Aim

To determine the preferable treatment for congenital pseudarthrosis of the tibia, we retrospectively reviewed 19 patients (20 limbs) treated consecutively over a 22 year period (1988–2007). Fifteen were followed up to maturity. The patients were assessed for union, leg length discrepancy (LLD), ankle valgus, range of ankle movement and distal tibial physeal injury.

Results

The median age at surgery was 3 years. At surgery nineteen of the tibiae had a dysplastic constriction with a fracture (Crawford II-C or Boyd II) lesion.

To obtain union in the 20 tibiae, 29 procedures were done. Nine failed primarily and required a second procedure to obtain union. Older patients (≥ 5 years) had a significantly higher success rate.

Excision, intramedullary rodding and bone graft (IMR) was done in 14 tibiae: 10 (71.4%) were successful. Six of 10 primary operations and all 4 secondary operations after a previous failed procedure were successful.

Ipsilateral vascularized fibula transfer (IVFT) was successful in 5 tibiae (3 primary and 2 secondary). Ilizarov with bone transport only, failed in two patients. Ilizarov with excision, intramedullary rodding and bone graft with lengthening was successful in 2 of 5 cases (40%); two sustained fractures at the proximal lengthening site.

A median leg length discrepancy (LLD) of 3 cms occurred post surgery which was treated with contralateral epiphysiodesis. At maturity 3 patients had a LLD of ≥ 2cms. Six limbs had ankle valgus and were treated with stapling and tibio-fibular syndesmosis. Decreased range of movement of the ankle (< 50%) occurred in 7 patients. Distal tibial physeal injury occurred in 4 patients and was associated with repeated rodding.

Aim

In an earlier study we identified severe Vitamin D deficiency as a problem in institutionalised children with cerebral palsy (CP), which resulted in rickets and a high incidence of fractures. The purpose of this study was to establish whether a cohort of non-ambulatory children with CP, living at home, presented with Vitamin D deficiency.

Method

The participants were a consecutive sample (N=100) of non-ambulatory children with CP attending a CP outpatient clinic. Their ages ranged from 2 to 15 years (mean 5.8, SD 3.3 years). There were 57 males and 43 females. Nineteen were on Level IV of the Gross Motor Function Classification System (GMFCS), and 81 were on Level V. 66% were on anticonvulsant therapy (ACT). Basic demographic data was collected, and measurements included blood sample analysis and wrist radiographs. There was radiographic evidence of osteopenia and delayed ossification of the carpal bones.

Introduction

Coxa vara is an uncommon orthopaedic condition. Problems associated with the definition, radiological appearance, classification and surgical treatment are discussed.

Methods

A clinical and radiological review of 11 patients (14 hips) treated with a LCP plate (Synthes) in our paediatric orthopaedic unit from 2010 to 2013 was performed. These hips were classified as congenital (6), developmental (3) and acquired (5).

The Hilgenreiner Epiphyseal (HE) angle, the head/shaft angle and the neck/shaft angle were all assessed and examples shown why one measurement does not address every case.

Background

The gold standard of care of clubfoot is the Ponseti method of serial manipulation and casting, followed by percutaneous tendo-achilles tenotomy. In our setting, registrars work in district hospitals where they run Ponseti clubfoot clinics with little or no specialist supervision. They use the Pirani score to serially assess improvement of the deformity during casting and to determine whether the foot is ready for tenotomy.

Purpose of Study

To test the inter-observer reliability of the Pirani score, and whether it can be used by non-specialist doctors running Ponseti clubfoot clinics.

Introduction

Non accidental injury is an under diagnosed problem worldwide. It is for this reason that all healthcare workers should be equipped in making the diagnosis and be aware of their obligation according to the Children's Act.

Purpose

The aim of the study was to determine if child abuse is adequately diagnosed at our institution and to identify areas of weakness in our current management protocol.

Introduction

Management of the sequelae of arthritis of the hip joint has changed over time. Total joint replacement has gained popularity due to retained mobility and stability. In the high demand paediatric and adolescent population problems are encountered with longevity of the procedure. Hip arthrodesis is a useful alternative procedure that sacrifices mobility of the joint to achieve pain relief and restores function. Several surgical techniques have been described to achieve hip fusion. We describe a technique that achieves concentric bone surfaces with hip resurfacing reamers. Maximum bone is preserved to maintain leg length. Trans-articular compression is achieved with cannulated screw fixation. Subtrochanteric de-functioning osteotomy completes the procedure to protect the fusion site and control the position of the limb. Our optimal position of fusion was 30 degrees of flexion, neutral to 5 degrees of abduction and neutral to 10 degrees of external rotation.

Methods

Fourteen patients (8 female) treated by hip arthrodesis over a two-year period are reviewed in terms of clinical and radiological outcome in the short term. Their mean age at hip fusion was 11 years (6–18). The etiology included TB (6 cases), staphylococcal infection (2), non-specific arthritis (3), Perthe's (1), chondrolysis (1) and avascular necrosis following trauma (1).

Introduction

The femoral neck in children is a common site for bone lesions. The majority are benign. However these lesions can cause diagnostic problems

Aim

To present a spectrum of chronic lesions of the femoral neck in children and emphasize the importance of tissue diagnosis

Introduction

The Ponseti method for the treatment of idiopathic club foot is the gold standard of treatment in South Africa. A study in New York reviewed attainment of gross motor milestones (GMM) in these children and found that independent ambulation was delayed on average by 2 months compared to unaffected children.

Methods

A retrospective review of gross motor milestones was performed in patients treated at a South African clubfoot clinic. All patients were walking independently at review. Ages at attainment of motor milestones were recorded (sitting, crawling and walking independently). The World Health Organisation (WHO) published the normal range for achievement of these milestones in six regions across the world. We compared the results of our patients to the 50th percentile in that study.

Purpose and Introduction

The burden of Tuberculosis (TB) in South Africa is significant with recent reports showing an increase in the incidence of multi-drug resistant (MDR) TB. Little is known of the incidence and epidemiology, especially of MDR Tuberculous arthritis in children in the South African setting. The purpose of this study is to identify the number of TB cases identified with positive histology, culture and sensitivity.

Methods

A retrospective review of laboratory results of children under the age of 14 years with Tuberculous arthritis at a South African Hospital between January 2008 and December 2012 was performed. The data was extracted from the NHLS data base for all synovium, bone or joint fluid collected for TB culture, sensitivity and histology.

Introduction and Purpose of Study

Osteogenesis imperfecta (OI) is a bone metabolic disorder that results in multiple fractures and deformities in children. The management of these patients should be in highly specialised units were multi-disciplinary management is mandatory. The aims of this study were twofold: 1. To determine the incidence and pattern of fractures in this population. 2. To determine the type, outcomes and complications of surgical treatment in the same population.

Methods

A retrospective audit of patients treated for OI at a tertiary academic Hospital, from January 2002 to December 2011 was done.

Purpose of study

The primary treatment of congenital talipes equinus varus with the Ponsetti method remains the gold standard of treatment. Relapsed, neglected and/or teratogenic clubfeet pose a significant treatment challenge as the long term outcome of posteromedial release surgery is poor. Advances in circular fixation offer predictable deformity correction without the need for extensive soft tissue release. The Taylor Spatial Frame utilizes the correction principles of the “Ponsetti Method”, but little literature exists describing the correction of relapsed clubfeet with these fixators. This study assesses the outcome of relapsed clubfeet treated with the Taylor Spatial Frame Circular fixator.

Methods

Ethics approval was obtained for a prospective descriptive study (N10-10-338). Patients with clubfeet who met inclusion criteria were treated with a Taylor Spatial Frame. The International Clubfoot Study Group Score was used to assess the feet preoperatively and six months postoperative. This scoring system scores the morphology, functionality and radiographic parameters of the clubfoot. Quality of life was assessed by means of the Child Health Questionnaire.

Method

Surgical dislocations were created and pressure monitors inserted into the canal. Pressures on the cord from the posterior-superior edge of the caudal body as well as that from the cranial body were assessed at the level of the dislocation. The effects of the presence of a disc and its size, reduction angles and level of dislocation before and during closed reduction were evaluated.

Results

The average dislocated spinal cord pressures were measured at 3.81 kPa and increased to 20.22 kPa under traction. This decreased to 1.295 kPa after cervical spine reduction. Average cord pressures as well as peak loading pressures were shown to increase with the increasing size of the prolapsed disc and diminished once the spine was reduced.

Purpose of the study

To review the primary bone tumours of the spine treated at our unit.

Description of methods

Retrospective review of folders and x-rays of all the patients with primary bone tumours of the spine treated at our unit between 2005 and 2012. All haematological tumours were excluded.

Purpose of Study

Debate exists in the literature about the surgical management of sub-axial cervical burst fractures regarding the approach and types of fixation of these injuries. Our Acute Spinal Injury (ASCI) unit prefers anterior only cervical corpectomy and plate fixation in the management of these injuries. The objective of this study was to radiologically assess the long term outcomes (minimum 2 yrs) of our series.

Patients and Methods

Patients were identified using the Acute Spinal Injury Unit (ASCI) database that had had anterior only corpectomy and plate fixation for trauma as a standardised procedure between 2006 and 2009. Initial post-op radiological review included the sagittal alignment, hardware characteristics and surgical technique. Radiological review after a minimum of 24 months involved the union, sagittal alignment, hardware characteristics, graft incorporation and adjacent level degeneration at the site of injury.

Aim

To evaluate efficacy of a one stage posterior approach in decompression and eradication of infection in TB spine.

Background

The classic operation for TB spine is anterior spine debridement. This involves a trans-thoracic, or retroperitoneal approach, thus increasing morbidity in an already compromised patient. The anterior procedure in the form of the Hong Kong operation is aimed at decompressing the spine, and debridement of necrotic tissue. If kyphosis is a major problem, its correction requires a posterior procedure, often not at the same sitting.

Purpose

To review the outcome of multilevel (≥4) instrumented lumbar fusion to sacrum / pelvis performed for degenerative conditions

Methods

Clinical data of 47 consecutive patients from 2002 to 2012 were reviewed retrospectively. Inclusion criteria included fusion from at least L2 to S1 / pelvis, i.e. minimum of 4 levels. Imaging was assessed for restoration of normal sagittal profile as well as subsequent fusion. EQ5D, OSD and VAS scores pre-op and at 6 months post op were analysed. Average age at surgery was 64 years (50–78). Thirteen cases were primary and 34 revisions. Indications were axial back pain either associated with sagittal imbalance (40%) or leg pain (36%) and leg pain alone in 10%.

Purpose Of Study

The study was started in 2004 to determine the best bearing surface in the long term, and to measure the metal ion levels generated by each of the bearing surfaces. We present the latest updated results.

Material and methods

A prospective randomised study was started in 2004 to compare the wear characteristics of Ceramic on X linked Polyethylene (C.O.P.), Ceramic on Ceramic (C.O.C), Ceramic on Metal (C.O.M.) and Metal on Metal (M.O.M) bearings. The level of Cobalt and Chrome ions in red blood cells have been documented at serial intervals, using the ICP – MS method. Aside from the bearing surfaces the rest of the implant is standard, using a Pinnacle Cup, Corail Stem and 28mm heads.

256 Cases were enrolled on the study. To date 71 cases have been lost due to death (26), revision (9) and lost to follow up (36), leaving us with 185 for follow-up. An even spread of cases in each bearing surface are still available for follow up, viz. 46 C.O.P, 48 C.O.C., 44 C.O.M. and 47 M.O.M. Average follow up is currently 4.8 years, ranging up to 9 years.

Background

Cup inclination is a major factor in the success of a total hip replacement. An open cup position can lead to dislocation or increased wear from rim loading and a closed cup position lead to impingement against the femoral neck or psoas. Although the ideal inclination for cup position is recommended as between 40 and 45 degrees, accurate positioning of the implant might be influenced by pelvic flexion and movement of the patient's pelvis during the procedure. We wanted to examine if the transvers acetabular ligament (TAL) could be used to determine cup inclination intra-operatively.

Methods

16 hips from 9 cadaveric specimens were used for the study. A computer navigation system (Brain lab) was used to measure and document the exact inclination and version of the acetabular trial component in three positions: flush with the transvers acetabular ligament (TAL), with the rim of the cup 5 mm from the TAL in a cranial direction and with the rim of the cup 5 mm caudally displaced. Statistical analysis of the results was performed by the Department of Biostatistics.

Background

Rapid mobilisation programs, or “fast track” protocols, are aimed at shorter hospital stays. We found a limited local experience with these programs in total hip arthroplasty in South Africa, and decided to introduce a pilot study at our institution.

Purpose

This pilot study is aimed at the feasibility and safety of a RM program in the private sector setting, as well as a review of the pertinent literature.

Introduction

Antibiotic loaded polymethyle methacrylate spacers are commonly used in the management of septic hip replacements.

Aim

The aim of this study was to determine wear patterns on the articulating surfaces of these spacers, as well as to determine the extent of PMMA particulate debris generation.

Introduction

Dislocation is one of the most common orthopaedic complications after primary total hip replacement (THR). The reported dislocation rate in elective THR is 5–8%. This number increases up to 22% for THR done for neck of femur fractures. Due to the reported increase in dislocation for trauma, some surgeons prefer to do a hemi-arthroplasty or open reduction and internal fixation (ORIF). Hemi-arthroplasty is known to have poorer functional outcomes. Failure of ORIF is as high as 43%, and revision of failed ORIF to THR has reported dislocation rates of up to 42%.

Materials and methods

A retrospective review of all THR done for neck of femur fractures during 2006–2011 was undertaken. The patients in our institution who are considered for a THR must have an active life-style. Records were reviewed for delay to surgery, surgical approaches, articulations, bearing surfaces, follow up periods and cemented versus uncemented implants. We excluded all pathological fractures, extra-capsular fractures, failed ORIF, patients with incomplete data and patients with a follow-up period less than 3 months.

Hip dislocation was the end-point of the review and we did not study other causes of revision e.g. loosening of components or infection.

Aim

The purpose of the study was to assess the safety of Intra-articular steroid hip injections (IASHI), prior to ipsilateral total hip arthroplasty (THA).

Method

We investigated whether there was an excess of infection in such a group 7–10 years after total hip arthroplasty. A database of 49 patients who had undergone IASHI followed by ipsilateral THA was reviewed.

Purpose Of Study

The in vivo evaluation of patellofemoral contact pressures in a posterior stabilized compared to posterior cruciate sacrificing total knee arthroplasty (TKA).

Methods

A prospective descriptive non randomized study was performed on 8 patients. A standard approach to a TKA was performed using a balanced gap technique, while the patella was prepared for a resurfacing. The trial components for the posterior stabilized (PS) TKA where inserted including the gas sterilized pressure transducer (a patella button). Soft tissue was approximated and the knee was taken through full range of movement. Patellofemoral pressure was measured and captured continuously through the full range of movement. The posterior cruciate sacrificing (CS) components were inserted into the same patient and the procedure repeated. In addition, anterior translation of the tibia relative to the femur was measured at 90 degrees. The transducer was removed and final components, including a patella resurfacing were inserted.

Background and Purpose of Study

The Valgus knee in total knee Arthroplasty, is considered a more demanding procedure, often with ligament balance a greater challenge than seen with neutral or Varus knees. It has also frequently been suggested that prostheses with higher levels of constraint be used to avoid late-onset instability. Various lateral release techniques have also been suggested in the literature.

This study is aimed at assessing the outcomes of an unconstrained, rotating platform designed prosthesis, the LCS, using our technique, in the management of severe valgus deformity.

Methods

44 knees in 42 patients with a pre-operative valgus deformity of more than 10 degrees were included in our retrospective series. We analyzed the radiographs for the degree of correction, the angle of tibial tray implantation, and femoral implantation angle, tibial slope, as well as the presence (or degree) of lift off and any complications were noted.

In this group, 7 had a Valgus deformity of greater than 25 degrees, with a mean Valgus deformity of 17,36 degrees. The mean age at operation was 65. Clinical and radiological analysis was done Pre-hospital discharge and again post-operatively 6 weeks.

Introduction

Meniscal tears in middle-aged patients are common. There is a lack of consensus regarding the optimum management of these injuries. Although arthroscopic partial meniscectomy (APM) is a frequently performed surgical option, literature has failed to prove its effectiveness over conservative approaches.

Materials and Methods

We retrospectively reviewed 102 middle-aged (age > 40 years) patients who had been treated for meniscal tears between January 2010 and December 2012. We followed these patients up telephonically to assess knee outcome satisfaction rates, any early (6 weeks) improvements in pain and knee function and their pre-morbid and post-treatment activity levels (Tegner Activity Scale).

Purpose of the study

We reviewed one hundred and twenty patients who had primary total hip replacement using Corail/Pinnacle Metal on metal bearing surfaces between 2006 and 2009.

We were interested in the metal ion levels of the whole cohort, the incidence of unexplained pain, pseudo tumour lesions (ALVAL) and early loosening and failure. We were particularly interested in the relationship of the acetabular cup position in relation to the pelvis and lumbar spine.

Material and methods

We reviewed 120 charts and 104 patients in total.

All patients had metal ion assays (cobalt and chromium)

All patients had standardised radiographic evaluation using a special technique to assess acetabular cup position and the relationship to the pelvis and lumbar spine.

Methods

All explanted stems were analysed in respect of the reasons for failure. The patient's serial radiographs and clinical records were also analysed.

Results

All stems demonstrated some fixation distally. They all showed little proximal osteo-integration. A biomechanical analysis confirmed the vulnerability of these long stemmed modular prostheses in respect of mechanical failure. The resultant unprotected lever-arms led to local stresses in the prosthesis constructs which were above the failure threshold resulting in prosthesis fractures. These fractures all occurred at points where the prostheses were structurally most vulnerable.

Abstract Detail

Interim results on a prospective, randomised, single-blinded pilot study to compare implant alignment using a patient-matched cutting guide versus a computer-assisted navigation system following total knee arthroplasty.

Purpose of Study

To compare implant alignment using a patient-matched cutting guide (Visionaire) versus a computer-assisted navigation system (CAS) following total knee arthroplasty (TKA).

Introduction

Early rehabilitation of hip and knee replacement patients has been advocated with the recent minimally invasive approaches to lower limb replacement allowing earlier mobilization and earlier discharge. Rehabilitation has been progressively shortened from the time of Charnley in such a way that patients are now expected to stay in hospital for only a couple of days before going home. New rehabilitation protocols recommend mobilization on day 0, the day of surgery, with earlier discharge possible.

Methods

All primary hip and knee replacement patients were enrolled in a rapid rehabilitation protocol. All patients had standard incisions performed: a posterior approach for THR and a standard Insall para-patellar approach for TKR. The protocol included pre-emptive analgesia, post-op oral analgesia with high dose NSAIDs, pregabolin, neuro-axial anaesthesia, avoidance of opiates and colloid fluid replacement prior to mobilization. Morning patients were mobilized the day of surgery and afternoon patient the following morning. Duration of hospitalisation was compared to patients treated the previous year where the only difference in protocol was femoral blocks for TKR, no colloid replacement prior to mobilization, and routine day 1 mobilization.

Introduction

Valgus knees are generally more difficult to get acceptable alignment and balance than the varus knee. Most of these are due to anatomical variations in both the diaphysis of the femur, with low valgus angles (angle between the anatomic and mechanical axis of the femur) and the tibial diaphysis. In addition there are those with dysplastic lateral distal femoral condyle s and low external femoral angles (below 84 degrees)

Aim

To assess the clinical results, patient satisfaction and alignment and balance achieved in those with a pre-operative mechanical valgus above 10 degrees.

Background

When positioning and rotating the femoral cutting block (AP) on the femur it can either be done according to bony landmarks (measured resection) or by tensioning the flexion gap and positioning it parallel to the tibia (gap balanced technique.) Accurate rotation of the femoral component is essential to ensure a symmetric flexion gap to ensure optimal tibio-femoral kinematics and patello-femoral tracking.

Methods

74 consecutive total knee replacements were assessed intra-operatively for symmetry of the flexion gap by applying a varus and a valgus stress and digitally recording the opening with a computer assisted navigation system. External rotation of the femoral component according to the bony landmarks was measured radiologically. This was compared to the external rotation suggested by the navigation intra-operatively using a gap balanced workflow.

Introduction

Arthrodesis is usually offered to patients in whom a two stage exchange arthroplasty has already failed or is likely to fail because of local factors (such as soft tissue damage, bone loss or poor perfusion), or because of systemic conditions which categorise the patient as a C-host (e.g. immune deficiency, diabetes and malnutrition). In other words arthrodesis is selected for patients with the worst prognosis.

Method

I use an intramedullary nail extending from trochanter to just above the ankle which is locked distally only. The nail is curved with an arc of a 2 meter radius. This conforms to the shape of the femur and when passed through to the straight tibia it ends against the posterior cortex of the distal tibia where the bone is thickest. It creates an angle of between 9° and 11° of flexion at the knee. The nail is bent into 5° of valgus at the point where the femur and tibia meet. This allows the two bones to coapt, dynamise and unite. The procedure is performed in two stages. At the first every effort is made to eradicate the infection by debridement and appropriate local and systemic antibiotics. The nail is inserted at the second procedure and again every effort is made to deal with infection. If infection persists one can easily remove the nail when the knee has fused, and repeat the attempt to eradicate the infection in better circumstances.

I have devised a scoring system in order to evaluate the eradication of infection based on clinical grounds, laboratory investigations and radiological examination. This allows for the fact that cure of an infection is not based on any one parameter