Institute Du Mouvement Et Of Lappareil Locomoteur

Sainte-Marguerite, France

Institute Du Mouvement Et Of Lappareil Locomoteur

Sainte-Marguerite, France
SEARCH FILTERS
Time filter
Source Type

Ollivier M.,Aix - Marseille University | Ollivier M.,Institute for Locomotion | Ollivier M.,Laboratoire Danatomie Of La Faculte Of Medecine Of Marseille | Ollivier M.,Institute Du Mouvement Et Of Lappareil Locomoteur | And 12 more authors.
Surgical and Radiologic Anatomy | Year: 2015

This study aimed to determine (1) whether: gender, morphotype, or etiology are correlated with the shape of the proximal femur in patients with advanced hip osteoarthritis and (2) is there any clinical predictive factors of potential abnormal anatomy of the hip at the time of total hip arthroplasty (THA)? We reviewed 689 European hips of patients who underwent THA for primary osteoarthritis (OA) or avascular necrosis (AVN), between 2000 and 2005. The patients were stratified according to their (1) Morphotype, (2) Gender, and (3) Etiology for undergoing THA. Two independent observers measured the following four anatomical parameters on preoperative CT-scans: neck shaft angle (NSA) and femoral neck version, femoral offset and lower-limb torsion. Our results showed that both morphotype and etiology, but not gender or body mass index, were correlated with femoral anatomical parameters. Two types of patients were identified as “at risk” for abnormal hip anatomy: (1) AVN-Endomorphic patients (2) OA-Ectomorphic patients. Etiology of the advanced hip osteoarthritis and patients’ morphotype may predict the proximal femur anatomy at the time of THA. © 2014, Springer-Verlag France.


Galland A.,Institute Du Mouvement Et Of Lappareil Locomoteur | Airaudi S.,Institute Of La Main Et Du Membre Superieur | Gravier R.,Institute Of La Main Et Du Membre Superieur | Le Cann S.,French National Center for Scientific Research | And 2 more authors.
International Orthopaedics | Year: 2013

Purpose: We evaluated the biomechanical strength of two all suture anchors (ASA) of reduced diameter (1.4 mm) and compared them with the standard screw anchor (SA) with larger diameter (5.5 mm) used in rotator cuff tears. Methods: We conducted 30 uniaxial vertical pullout tests using Material Testing System Instron 5566A until failure of the anchorage defined as rupture of the threads or anchor or detachment of the anchor. Anchor fixation was on tuberosities of fresh bovine humerus bone. ASAs were spaced four millimetres apart and were compared with a control SA implanted on the same greater tubercle at two centimetres. The tests were all performed at room temperature in a dry environment. Tensile loads (10 mm/min) were applied parallel to the axis of insertion. A preloading of 10 N was used to overcome loading artifacts of the test sample at the beginning of the test. Results: Student's t test showed no statistically significant difference between anchors in terms of load to failure (ASA: force 265.06 ± 87.25 N versus SA: 325.35 ± 113.46 N; p = 0.09) and mean elongation at rupture (ASA: 23 ± 7 mm versus SA: 21 ± 6 mm; p = 0.46). Conclusions: In vitro, this experimental study showed no statistically significant difference in pullout strength and displacement between ASA and SA at a chosen level of significance (p < 0.05). © 2013 Springer-Verlag Berlin Heidelberg.


Maurel B.,Service de Radiologie Interventionnelle Non Vasculaire | Maurel B.,Institute Du Mouvement Et Of Lappareil Locomoteur | Le Corroller T.,Institute Du Mouvement Et Of Lappareil Locomoteur | Bierry G.,Service de Radiologie Interventionnelle Non Vasculaire | And 3 more authors.
Skeletal Radiology | Year: 2013

Purpose: To describe the technique and clinical outcome of percutaneous injection of bone cement in the treatment of symptomatic para-articular intraosseous cysts. Materials and methods: Five patients (three men, two women; mean age 35 years) with painful para-articular intraosseous cysts were treated by percutaneous injection of bone cement under combined fluoroscopic and computed tomography (CT) guidance. The lesions were all located in weight-bearing bones, involving the acetabulum, proximal tibia, distal tibia, talus, and calcaneus, respectively. Results: The average amount of bone cement injected was 2.1 ml (range, 0.6-3.5 ml). Calcium phosphate cement was used in four cases and acrylic cement in one case. There were no immediate or delayed complications. Full pain relief was obtained between 1 and 4 weeks after treatment. All patients made a complete recovery and were pain-free at their last visit. Conclusions: Percutaneous injection of bone cement was a safe and efficient technique in the management of symptomatic para-articular intraosseous cysts in our population. © 2012 ISS.


PubMed | University of Lausanne, Institute Du Mouvement Et Of Lappareil Locomoteur, Service Route and Institut Universitaire de France
Type: Journal Article | Journal: Orthopaedics & traumatology, surgery & research : OTSR | Year: 2015

Periprosthetic femur fracture (PFF) is a serious complication after total hip arthroplasty that can be treated using different internal fixation devices. However, the outcomes with curved non-locking plates with eccentric holes in this indication have not been reported previously. The objectives of this study were to determine: (1) the union rate; (2) the complication rate; (3) autonomy in a group of patients with a Vancouver type B PFF who were treated with this plate.Use of this plate results in a high union rate with minimal mechanical complications.Forty-three patients with a mean age of 79 years 13 (41-98) who had undergone fixation of Vancouver type B PFF with this plate between 2002 and 2007 were included in the study. The time to union and Parker Mobility Score were evaluated. The revision-free survival (all causes) was calculated using Kaplan-Meier analysis. The average follow-up was 42 months 20 (16-90).Union was obtained in all patients in a mean of 2.4 months 0.6 (2-4). One patient had varus malunion of the femur. The Parker Mobility Score decreased from 5.93 1.94 (2-9) to 4.93 1.8 (1-9) (P = 0.01). Two patients required a surgical revision: one for an infection after 4.5 years and one for stem loosening. The survival of the femoral stem 5 years after fracture fixation was 83.3% 12.6%.Use of a curved plate with eccentric holes for treating type B PFF led to a high union rate and a low number of fixation-related complications. However, PFF remains a serious complication of hip arthroplasty that is accompanied by high morbidity and mortality rates.


Le Cann S.,Aix - Marseille University | Le Cann S.,Institute Du Mouvement Et Of Lappareil Locomoteur | Galland A.,Aix - Marseille University | Galland A.,Institute Du Mouvement Et Of Lappareil Locomoteur | And 11 more authors.
Medical Engineering and Physics | Year: 2014

Most acetabular cups implanted today are press-fit impacted cementless. Anchorage begins with the primary stability given by insertion of a slightly oversized cup. This primary stability is key to obtaining bone ingrowth and secondary stability. We tested the hypothesis that primary stability of the cup is related to surface roughness of the implant, using both an experimental and a numerical models to analyze how three levels of surface roughness (micro, macro and combined) affect the primary stability of the cup. We also investigated the effect of differences in diameter between the cup and its substrate, and of insertion force, on the cups' primary stability. The results of our study show that primary stability depends on the surface roughness of the cup. The presence of macro-roughness on the peripheral ring is found to decrease primary stability; there was excessive abrasion of the substrate, damaging it and leading to poor primary stability. Numerical modeling indicates that oversizing the cup compared to its substrate has an impact on primary stability, as has insertion force. © 2014 IPEM.


Lunebourg A.,University of Lausanne | Lunebourg A.,Institute Du Mouvement Et Of Lappareil Locomoteur | Mouhsine E.,University of Lausanne | Cherix S.,University of Lausanne | And 3 more authors.
Orthopaedics and Traumatology: Surgery and Research | Year: 2015

Introduction: Periprosthetic femur fracture (PFF) is a serious complication after total hip arthroplasty that can be treated using different internal fixation devices. However, the outcomes with curved non-locking plates with eccentric holes in this indication have not been reported previously. The objectives of this study were to determine: (1) the union rate; (2) the complication rate; (3) autonomy in a group of patients with a Vancouver type B PFF who were treated with this plate. Hypothesis: Use of this plate results in a high union rate with minimal mechanical complications. Materials and methods: Forty-three patients with a mean age of 79 years. ±. 13 (41-98) who had undergone fixation of Vancouver type B PFF with this plate between 2002 and 2007 were included in the study. The time to union and Parker Mobility Score were evaluated. The revision-free survival (all causes) was calculated using Kaplan-Meier analysis. The average follow-up was 42 months. ±. 20 (16-90). Results: Union was obtained in all patients in a mean of 2.4 months. ±. 0.6 (2-4). One patient had varus malunion of the femur. The Parker Mobility Score decreased from 5.93. ±. 1.94 (2-9) to 4.93. ±. 1.8 (1-9) (P= 0.01). Two patients required a surgical revision: one for an infection after 4.5 years and one for stem loosening. The survival of the femoral stem 5 years after fracture fixation was 83.3%. ±. 12.6%. Conclusion: Use of a curved plate with eccentric holes for treating type B PFF led to a high union rate and a low number of fixation-related complications. However, PFF remains a serious complication of hip arthroplasty that is accompanied by high morbidity and mortality rates. Level of evidence: Retrospective study, level IV. © 2015 Elsevier Masson SAS.


PubMed | Institute Du Mouvement Et Of Lappareil Locomoteur
Type: Comparative Study | Journal: International orthopaedics | Year: 2013

We evaluated the biomechanical strength of two all suture anchors (ASA) of reduced diameter (1.4 mm) and compared them with the standard screw anchor (SA) with larger diameter (5.5 mm) used in rotator cuff tears.We conducted 30 uniaxial vertical pullout tests using Material Testing System Instron 5566A until failure of the anchorage defined as rupture of the threads or anchor or detachment of the anchor. Anchor fixation was on tuberosities of fresh bovine humerus bone. ASAs were spaced four millimetres apart and were compared with a control SA implanted on the same greater tubercle at two centimetres. The tests were all performed at room temperature in a dry environment. Tensile loads (10 mm/min) were applied parallel to the axis of insertion. A preloading of 10 N was used to overcome loading artifacts of the test sample at the beginning of the test.Students t test showed no statistically significant difference between anchors in terms of load to failure (ASA: force 265.06 87.25 N versus SA : 325.35 113.46 N; p = 0.09) and mean elongation at rupture (ASA : 23 7 mm versus SA : 21 6 mm; p = 0.46).In vitro, this experimental study showed no statistically significant difference in pullout strength and displacement between ASA and SA at a chosen level of significance (p < 0.05).

Loading Institute Du Mouvement Et Of Lappareil Locomoteur collaborators
Loading Institute Du Mouvement Et Of Lappareil Locomoteur collaborators