Piers J Yates

Piers J Yates
St John of God Healthcare, Australia · orthopaedics

About

54
Publications
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1,301
Citations
Citations since 2017
5 Research Items
708 Citations
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2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140

Publications

Publications (54)
Article
Full-text available
Method: A prospective study was conducted including 370 patients (mean age: 42, range 18-88 years) undergoing ORIF for ankle fractures. Wound closure was performed according to a standardized protocol (layered with vicryl and nylon), and dressings were applied via randomisation with with chlorhexidine 0.5% in alcohol 70% (n=185), or normal opsite®...
Article
Purpose: The purpose of this study was to evaluate whether the presence of hip osteoarthritis at the time of hip fracture increases treatment failure rates when using either a sliding hip screw (SHS) or proximal femoral nail (PFN) for fracture fixation. Methods: A retrospective study of a consecutive series of 455 women and 148 men (median age,...
Article
Full-text available
Redirective, periacetabular osteotomies (PAO) represent a group of surgical procedures for treatment of developmental dysplasia of the hip (DDH) in skeletally mature and immature patients. The ultimate goal of all procedures is to reduce symptoms, improve function and delay or prevent progression of osteoarthritis. During the last two decades, the...
Article
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Following the recognition of femoroacetabular impingement (FAI) as a clinical entity, diagnostic tools have continuously evolved. While the diagnosis of FAI is primarily made based on the patients’ history and clinical examination, imaging of FAI is indispensable. Routine diagnostic work-up consists of a set of plain radiographs, magnetic resonance...
Article
Full-text available
The incidence of dislocation after primary THR has been quoted up to 2.25%, and between 2% and 20% for revision THR. We report clinical and radiological findings in 76 patients treated with a constrained liner for those considered at high-risk for dislocation, intraoperative instability or recurrent dislocations. Mean follow up was 12 months. Post...
Article
Background: In recent years, new models of health service delivery in orthopaedic outpatient clinics, including physiotherapists working in orthopaedic triage roles, have become increasingly common. Evaluation of patient satisfaction with orthopaedic clinic services is dependent on an understanding of factors influencing patient satisfaction in th...
Article
Introduction: It was the aim of this biomechanical study to test a new extractor with 2 specific multigrip pliers on different stem designs and to compare it to a commonly used prefabricated one (UnMod). Methods: The new extractor comprises 2 specific multigrip pliers, 1 neck-pliers and 1 shoulder-pliers. The tests were performed on a tapered an...
Article
Background: To determine the effect of mobilization on the day of surgery on the readiness for discharge and length of stay after elective total hip arthroplasty (THA). Methods: We devised a randomized control trial with concealed allocation and intention-to-treat analysis. Overall, 126 patients who underwent THA and met the criteria for mobiliz...
Article
Case: We present a case of systemic cobalt toxicity secondary to third-body wear of a cobalt-chromium (CoCr) femoral head following revision of a fractured ceramic bearing. Removal of the CoCr head was followed by resolution of much of the systemic symptoms. Conclusion: This case supports previous reports of cobalt toxicity secondary to catastro...
Article
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Background: The use of local infiltration analgesia in the setting of knee arthroplasty is well established. There are no studies to date which have directly compared differences in infiltration techniques. The purpose of this study is to establish if a difference in patient outcomes exists when the infiltrate is injected into the periarticular ti...
Article
The aim of this study was to biomechanically evaluate the Locking attachment plate (LAP) construct in comparison to a Cable plate construct, for the fixation of periprosthetic femoral fractures after cemented total hip arthroplasty. Each construct incorporated a locking compression plate with bi-cortical locking screws for distal fixation. In the C...
Article
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The Oxford Hip Score (OHS) and Oxford Knee Score (OKS) are validated, reliable and reproducible outcome measures, however their use retrospectively has not been examined. The aim of this prospective cohort study was to examine the accuracy and reliability of patients' ability to recall their OHS and OKS in a retrospective manner. A total of 137 pat...
Article
We prospectively followed 112 hips, undergoing THR with a Spectron EF stem. At mean follow-up of 11.2 years, 21 patients had died. We obtained radiological follow-up in 99% and clinical follow-up in 100% of the surviving 91 hips. 54% demonstrated osteolysis in at least one Gruen zone. 22 hips required revision for all causes, with a further 5 stems...
Article
Background: The fixed-angle sliding hip screw has become a popular method of fixation for pertrochanteric hip fractures. The tip-to-apex distance (TAD) concept was introduced by Baumgaertner et al. in 1995 and has subsequently become a decisive predictor of the successfulness of fixation. The 135-degree plate has become the most popular plate used...
Article
Background Quantitative assessment of postsurgical knee motion provides sensitive measurements, but results are technical and may not be meaningful to patients. Although several knee-specific instruments exist, no patient-reported outcome (PRO) measure correlates function with improved stability, motion, satisfaction, and confidence. Objective To...
Article
Full-text available
Unstable proximal femoral fractures are common and challenging for the orthopaedic surgeon. Often, these are treated with intramedullary nails. The most common mode of failure of any device to treat these fractures is cut-out. The Synthes proximal femoral nail antirotation (PFNA) is unique because it is the only proximal femoral intramedullary nail...
Article
Background: Predictable patterns of periprosthetic fracture have been observed around polished double tapered stems. Finite element studies have suggested that triple-tapered stems cause less cement strain in torsion compared to double-tapered stems. Hence, we hypothesised that the in vitro behaviour of implanted double- and triple-tapered polishe...
Article
Background: Previous studies comparing unipolar and bipolar hemiarthroplasty for treatment of displaced intracapsular femoral neck fractures in elderly patients have often lacked methodological power and yielded conflicting clinical results. The objective of this study was to compare the clinical outcomes from each implant in a randomized cohort o...
Article
Full-text available
The demand for elective joint replacement (EJR) surgery for degenerative joint disease continues to rise in Australia, and relative to earlier practices, patients are discharged back to the care of their general practitioner (GP) and other community-based providers after a shorter hospital stay and potentially greater post-operative acuity. In orde...
Article
We prospectively followed 191 consecutive collarless polished tapered (CPT) femoral stems, implanted in 175 patients who had a mean age at operation of 64.5 years (21 to 85). At a mean follow-up of 15.9 years (14 to 17.5), 86 patients (95 hips) were still alive. The fate of all original stems is known. The 16-year survivorship with re-operation for...
Article
: Screw perforation of the humeral head in locking plate osteosynthesis occurs in up to 30% of cases. The current study compared different fixation possibilities (eg, number and position of screws) to reduce screw perforation in the humeral head. : A humeral head fracture with a missing medial support was created in 30 fresh-frozen cadavers and fix...
Article
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Overlap between the distal tibia and fibula has always been quoted to be positive. If the value is not positive then an injury to the syndesmosis is thought to exist. Our null hypothesis is that it is a normal variant in the adult population. We looked at axial CT scans of the ankle in 325 patients for the presence of overlap between the distal tib...
Article
Rationale, aims and objectives: High demand for orthopaedic specialist consultation has resulted in long waiting lists in public hospital out-patient clinics. This prospective study with a retrospective cohort analysis was conducted to evaluate the impact of a combined orthopaedic surgeon and physiotherapy triage clinic on waiting time and outcome...
Article
The optimal plate location and fixation method for midshaft fractures of the clavicle remains undetermined. The objective of this study was to develop a realistic biomechanical model with which to compare superior with inferior-medial plate placement, and the failure resistance of locked and against non-locked constructs. We estimated implant loads...
Article
Full-text available
To compare early functional outcomes, complications, and mortality in elderly patients treated with the less costly, cemented Thompson prosthesis or the cemented bipolar prosthesis in order to identify factors affecting outcomes. Records of 303 patients with femoral neck fractures treated with the cemented Thompson monoblock prosthesis (n=206) or t...
Article
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The outcome of modern resurfacing remains to be determined. The Australian Orthopaedic Association National Joint Replacement Registry (AOANJRR) started collection of data on hip resurfacing at a time when modern resurfacing was started in Australia. The rate of resurfacing has been higher in Australia than in many other countries. As a result, the...
Article
Intraoperative stress testing is required for the detection of syndesmosis instability following an ankle fracture. The present study compared two stress tests for the detection of syndesmotic injury. A true mortise radiograph of the ankle was made for fourteen cadaver joints. Specimens were randomized into two groups to simulate ligament and synde...
Article
Periprosthetic fractures after cemented hip replacement are a challenging problem to manage. Biomechanical studies have suggested the benefit of using locking screws for plate fixation, but there are concerns whether screws damage the cement mantle and promote crack propagation leading to construct failure. In this biomechanical study, different sc...
Article
We report the outcome of 58 consecutive polished tapered stems in 47 patients younger than 50 years, with a minimum of 10 years of follow-up. No stems were revised for aseptic loosening or osteolysis. The Harris hip scores were good or excellent in 76% of the patients. There was excellent preservation of proximal bone. Despite higher patient weight...
Article
Removal of the acetabular component of a hip resurfacing prosthesis is occasionally necessary for infection, malposition, metal sensitivity, wear, or as a necessary part of a femoral revision. Extraction of a well-fixed acetabular component can be technically demanding as it is often extremely well integrated into host bone and can result in catast...
Article
We retrospectively reviewed 175 patients (191 hips) who had undergone primary cemented total hip replacement between November 1992 and November 1995 using a collarless polished double-tapered femoral component after a minimum of ten years (mean 11.08; 10 to 12.8). All stems were implanted using contemporary cementing techniques with a distal cement...
Article
Patellofemoral problems are relatively common sequelae of total knee arthroplasty (TKA), and many factors contribute to these complications. Vascular compromise has been identified as a possible contributing factor, and was selected for further investigation in the present study. Laser Doppler Flowmetry was used to quantify patella intraosseous blo...
Article
We present the first reported case of a partial thickness burn to the skin from discarded bone cement during a routine total hip replacement (THR). The patient required plastic surgical attention for 5 months before the skin was healed. We summarise the reported incidents of cement burns to various other structures and the circumstances in which th...
Article
Spontaneous osteonecrosis of the knee (SONK) is generally associated with a poor prognosis but the outcome depends on the clinical and radiological stage at which the patients present. The earliest stage of this condition does not necessarily progress in every patient, but discriminatory radiological information is lacking in order to differentiate...
Article
Full-text available
We determined the effect of the surgical approach on perfusion of the femoral head during hip resurfacing arthroplasty by measuring the concentration of cefuroxime in bone samples from the femoral head. A total of 20 operations were performed through either a transgluteal or an extended posterolateral approach. The concentration of cefuroxime in bo...
Article
Full-text available
We reviewed 142 consecutive primary total hip replacements implanted into 123 patients between 1988 and 1993 using the Exeter Universal femoral stem. A total of 74 patients (88 hips) had survived for ten years or more and were reviewed at a mean of 12.7 years (10 to 17). There was no loss to follow-up. The rate of revision of the femoral component...
Article
Revision arthroplasty after infection can often be complicated by both extensive bone loss and a relatively high rate of re-infection. Using allograft to address the bone loss in such patients is controversial because of the perceived risk of bacterial infection from the use of avascular graft material. We describe 12 two-stage revisions for infect...
Article
Iontophoresis is a novel technique which may be used to facilitate the movement of antibiotics into the substance of bone using an electrical potential applied externally. We have examined the rate of early infection in allografts following application of this technique in clinical practice. A total of 31 patients undergoing revision arthroplasty o...
Article
The clinical and radiologic outcome of a cemented, polished, tapered stem (CPT), implanted using contemporary cementing techniques in 108 consecutive operated hips in 100 patients (68 women and 32 men, aged 19 to 83 years at the time of surgery [mean, 65 years]) was assessed after >5 years. The Harris hip scores were good or excellent in 96% of the...
Article
The clinical and radiologic outcome of a cemented, polished, tapered stem (CPT), implanted using contemporary cementing techniques in 108 consecutive operated hips in 100 patients (68 women and 32 men, aged 19 to 83 years at the time of surgery [mean, 65 years]) was assessed after [gt ]5 years. The Harris hip scores were good or excellent in 96% of...

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