Arpad Konyves - Academia.edu (original) (raw)

Papers by Arpad Konyves

Clinical Orthopaedics and Related Research, Aug 1, 2006

We describe the development of a method using radiostereometric analysis to measure fixation slip... more We describe the development of a method using radiostereometric analysis to measure fixation slippage and graft stretching after anterior cruciate ligament reconstruction. Initial development used a glass phantom object, then a series of laxity measurements of cadaveric knees. After this, we prospectively studied 14 patients after anterior cruciate ligament reconstruction using bone-patellar tendon-bone and hamstrings grafts. Tantalum markers were inserted into the femur, the tibia, and the graft. Radiostereometric analysis was used to measure sagittal laxity, graft stretching, and fixation slippage postoperatively and at intervals up to 1 year after surgery. The cadaveric knee laxity measured by RSA correlated with clinically-accepted KT2000 measurements. A steady increase in total anteroposterior laxity was found in both clinical groups during the year of followup. Migration of the bony fixations and stretching of the grafts tended to be higher in the hamstrings group. This method of anterior cruciate ligament graft analysis provides a new way to ascertain laxity changes in the reconstruction after surgery. Diagnostic Level II. See Guidelines for Authors for a complete description of levels of evidence.

Journal of Pediatric Orthopaedics B, 2004

Musculoskeletal complications following chickenpox are rare among immunologically normal children... more Musculoskeletal complications following chickenpox are rare among immunologically normal children. Septic arthritis after varicella is caused by group A Streptococcus and affects the knee most frequently. We present a case of septic arthritis of the elbow caused by Staphylococcus aureus. We review the English language literature on septic arthritis complicating chickenpox. We conclude that diagnosis and treatment should be carried out according to guidelines on de novo septic arthritis including the early use of magnetic resonance imaging.

Journal of Bone and Joint Surgery - British Volume, 2010

Infection remains a significant and common complication after joint replacement and there is deba... more Infection remains a significant and common complication after joint replacement and there is debate about which contributing factors are important. Few studies have investigated the effect of the operating time on infection. We collected data prospectively from 5277 hip and knee replacements which included the type of procedure, the operating time, the use of drains, the operating theatre, surgeon, age and gender. In a subgroup of 3449 knee replacements further analysis was carried out using the tourniquet time in place of the operating time. These variables were assessed by the use of generalised linear modelling against superficial, deep or joint-space post-operative infection as defined by the Australian Surgical-Site Infection criteria. The overall infection rate was 0.98%. In the replacement data set both male gender (z = 3.097, p = 0.00195) and prolonged operating time (z = 4.325, p &amp;lt; 0.001) were predictive of infection. In the knee subgroup male gender (z = 2.250, p = 0.02447), a longer tourniquet time (z = 2.867, p = 0.00414) and total knee replacement (versus unicompartmental knee replacement) (z = -2.052, p = 0.0420) were predictive of infection. These findings support the view that a prolonged operating time and male gender are associated with an increased incidence of infection. Steps to minimise intra-operative delay should be instigated, and care should be exercised when introducing measures which prolong the duration of joint replacement.

Journal of Bone and Joint Surgery - British Volume, 2005

We assessed leg length discrepancy and hip function in 90 patients undergoing primary total hip a... more We assessed leg length discrepancy and hip function in 90 patients undergoing primary total hip arthroplasty before surgery and at three and 12 months after. Function was measured using the Oxford hip score (OHS). After surgery the mean OHS improved by 26 points after three months and by 30 points after 12.

Clinical Orthopaedics and Related Research, 2006

Archives of Orthopaedic and Trauma Surgery, 2003

We reviewed the outcomes of 30 consecutive primary unicompartmental knee arthroplasties (UKA) per... more We reviewed the outcomes of 30 consecutive primary unicompartmental knee arthroplasties (UKA) performed by a single surgeon for medial compartmental osteoarthritis. Fifteen Allegretto knees were implanted without computer navigation and 15 EIUS knees were implanted with navigation. We compared the survivorship, radiological and clinical outcomes of the two groups at an average of 8.9 years and 6.9 years respectively. The patients were assessed clinically using the Oxford Knee Score (OKS) and radiologically using long-leg weightbearing films and non-weightbearing computed tomography alignment measurements. The overall survivorship was 86.7% at 9 years. A higher proportion of navigated knees were well aligned with a more reproducible position and malaligned knees tended to have a less favourable OKS. However, we found no statistically significant difference in survivorship, clinical outcome and radiological alignment between the two groups.

Journal of orthopaedic surgery (Hong Kong)