Advertisement for orthosearch.org.uk
Results 1 - 4 of 4
Results per page:
Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_3 | Pages 92 - 92
1 Apr 2018
Babel H Omoumi P Jolles BM Favre J
Full Access

Background

Although knee osteoarthritis (OA) has first been thought to be a wear-and-tear disease of the articular cartilage, it is now established that it is a disease of the entire joint. Unfortunately, its complex physiopathology is still incompletely understood, limiting the design of efficient therapeutic options. Recently, it has been suggested that OA could be related to the breakdown of the relationships among knee tissues rather than to isolated alterations of one or more tissues. However, there is a paucity of data regarding relationships among knee tissues. Better understanding the bone and cartilage relationships is thus of particular interest as both tissues contribute to the transfer of the mechanical loads through the joint and altered loading is known to be a main factor of OA onset and progression. Specifically, there is an interest to determine if cartilage thickness (CTh) and subchondral bone mineral density (sBMD), two properties related to loading, are adapted in healthy femurs.

Method

CT-arthrography of the knee was performed unilaterally on 16 healthy subjects (8 males; 61.8± 2.8 years old). Bone and cartilage boundaries were segmented on the CT images in order to calculate 3D CTh and sBMD maps. sBMD was calculated as the average intensity of the CT-arthrography in the superficial 3mm of bone. The 3D CTh and sBMD maps were transformed into 2D anatomically-standardized maps to allow comparison among individuals. According to literature, relationships between CTh and sBMD were assessed both in terms of magnitude and spatial distribution. The magnitude of CTh and sBMD was quantified using the ratio between the (CTh and sBMD) values in the load-bearing region of the medial and lateral condyles. The spatial distribution was quantified using the location of thickest cartilage or densest bone in the load-bearing region of the medial condyle. Pearson correlations were performed between CTh and sBMD metrics, using an alpha-level at 5%.


The Bone & Joint Journal
Vol. 98-B, Issue 8 | Pages 1027 - 1035
1 Aug 2016
Pereira LC Kerr J Jolles BM

Aims

Using a systematic review, we investigated whether there is an increased risk of post-operative infection in patients who have received an intra-articular corticosteroid injection to the hip for osteoarthritis prior to total hip arthroplasty (THA).

Methods

Studies dealing with an intra-articular corticosteroid injection to the hip and infection following subsequent THA were identified from databases for the period between 1990 to 2013. Retrieved articles were independently assessed for their methodological quality.


The Journal of Bone & Joint Surgery British Volume
Vol. 94-B, Issue 5 | Pages 648 - 655
1 May 2012
Jolles BM Grzesiak A Eudier A Dejnabadi H Voracek C Pichonnaz C Aminian K Martin E

This study compared the outcome of total knee replacement (TKR) in adult patients with fixed- and mobile-bearing prostheses during the first post-operative year and at five years’ follow-up, using gait parameters as a new objective measure. This double-blind randomised controlled clinical trial included 55 patients with mobile-bearing (n = 26) and fixed-bearing (n = 29) prostheses of the same design, evaluated pre-operatively and post-operatively at six weeks, three months, six months, one year and five years. Each participant undertook two walking trials of 30 m and completed the EuroQol questionnaire, Western Ontario and McMaster Universities osteoarthritis index, Knee Society score, and visual analogue scales for pain and stiffness. Gait analysis was performed using five miniature angular rate sensors mounted on the trunk (sacrum), each thigh and calf. The study population was divided into two groups according to age (≤ 70 years versus > 70 years).

Improvements in most gait parameters at five years’ follow-up were greater for fixed-bearing TKRs in older patients (> 70 years), and greater for mobile-bearing TKRs in younger patients (≤ 70 years). These findings should be confirmed by an extended age controlled study, as the ideal choice of prosthesis might depend on the age of the patient at the time of surgery.


The Journal of Bone & Joint Surgery British Volume
Vol. 83-B, Issue 7 | Pages 949 - 953
1 Sep 2001
Jolles BM Porchet F Theumann N

We carried out a retrospective review of 155 patients with lumbar spinal stenosis who had been treated surgically and followed up regularly: 77 were evaluated at a mean of 6.5 years (5 to 8) after surgery by two independent observers. The outcome was assessed using the scoring system of Roland and Morris, and the rating system of Prolo, Oklund and Butcher. Instability was determined according to the criteria described by White and Panjabi.

A significant decrease in low back pain and disability was seen. An excellent or good outcome was noted in 79% of patients; 9% showed secondary radiological instability.

Surgical decompression is a safe and efficient procedure. In the absence of preoperative radiological evidence of instability, fusion is not required.