Richard Ballas

• Medecine Doctor
• Medical Doctor at Clinique des Orchidées - Le Port

Objectives: Although a million people regularly play beach tennis (BT) through the world there is no published information on BT injuries. The aim of this study was to describe the epidemiology of BT injuries, and to identify differences between injured and non-injured players. Methods: This was a retrospective cross-sectional epidemiology study of...

Shoulder performance and sensorimotor control assessments help to identify shoulder instabilities and document the rehabilitation progress. Testing seated subjects in a position of hand prehension requires less controlled adjustments to maintain body balance in a clinically relevant situation. The objective of this work was to determine the test–re...

Certains traumatismes peuvent aboutir à une amputation. La préservation de l’articulation du genou et la longueur du moignon tibial permettent un appareillage fonctionnellement satisfaisant.

Les auteurs mettent ici entièrement à jour cet ouvrage conçu de façon pragmatique qui aborde les pathologies à la fois sur le plan clinique et sur le plan thérapeutique, tout en précisant les examens complémentaires. En pédiatrie, les recommandations officielles ont été nombreuses ces dernières années, notamment concernant l'antibiothérapie et la...

Background: Between January 2000 and September 2016, there have been 27 documented shark attacks on La Réunion Island. The insular nature of La Réunion has allowed us to carry out an extensive survey of these attacks. The objective was to describe the clinical features of these shark attacks, as only case reports have been published up to now. Me...

Aims The purpose of this study was to analyse the biomechanics of walking, through the ground reaction forces (GRF) measured, after first metatarsal osteotomy or metatarsophalangeal joint (MTP) arthrodesis. Patients and Methods A total of 19 patients underwent a Scarf osteotomy (50.3 years, standard deviation (sd) 12.3) and 18 underwent an arthrod...

Purpose: When the proximal humeral anatomy is altered because of malunion, shoulder arthroplasty is a challenge for the orthopaedic surgeon, and tuberosity osteotomy should be avoided whenever possible. The purpose of this study was to investigate the clinical and radiological outcomes of anatomic stemless shoulder arthroplasty in cases of malunio...

To improve control of the upper limb in high-level tetraplegic patients, the proximal shoulder must be the first consideration. Medialization of the anterior part of the deltoid muscle provides stabilization and is then an antagonist to the posterior deltoid when a pectoralis major palsy exists. It can also be performed in isolation in high-level t...

Hypothesis: A stemless reverse shoulder prosthesis with humeral cup was developed to allow stemless press-fit fixation, to preserve bone stock. Our hypothesis was that a stemless reverse shoulder arthroplasty could produce the same functional results without compromising humeral fixation. Methods: This is a continuous, prospective, single-surgeo...

Introduction: Accuracy of implant positioning in total knee arthroplasty (TKA) has a major impact on postoperative outcomes. We investigate the accuracy of positioning of multiples values simultaneously in TKA navigated, even among novice users. Method: The "novice" group included the first 91 knees operated on by 10 operators new to navigation...

Nous rapportons un cas unique, jamais publié auparavant, de migration d’une broche d’ostéosynthèse sternoclaviculaire vers la région pelvienne chez un patient de 56 ans. Une luxation sternoclaviculaire avait été fixée par trois broches deux années auparavant. Un épisode transitoire de douleur thoracique préchordiale, puis des douleurs abdominales r...

We report a unique case, never before published, of sternoclavicular joint fixation K-wire migration to the pelvic region, in a 56 year-old man. Two years previously, sternoclavicular dislocation had been fixed by three wires. A transitory episode of precordial thoracic pain followed by iterative abdominal pain accompanied the migration. Extraction...

Introduction L’ostéotomie du premier métatarsien (M1) et l’arthrodèse de la première articulation métatarso-phalangienne (MTP1) sont des techniques chirurgicales maitrisées. Les forces de réaction au sol n’avaient jamais été évaluées après ostéotomie, ni comparées avec l’arthrodèse. L’objectif de notre étude était d’étudier les forces de réaction a...

Jules Emile Péan réalisa la première arthroplastie d’épaule en 1893 à Paris en caoutchouc et platine pour une reconstruction après résection pour tuberculose de l’épaule. Bien qu’elle due être explantée 2 ans plus tard, ce fût une réussite en considérant les conditions de l’époque. Les prothèses modernes verront le jour en 1953 par Charles S. Neer1...