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M Perreau

Publications and source records attributed to M Perreau.

13 recordsLinked to original sources
PubMed2005

[Patellar position and lateral approach for total knee arthroplasty in degenerative knees with lateral femoropatellar arthrosis].

PURPOSE OF THE STUDY: Patellar malposition is a well-recognized patellar complication after total knee arthroplasty. Such residual malposition is particularly frequent when the knee presents lateral femoropatellar arthrosis. We compared the radiological position of the patella after total knee arthroplasty in degenerative knees with lateral femoropatellar arthrosis performed via a medial or lateral approach with elevation of the anterior tibial tuberosity. MATERIAL AND METHODS: Twenty-six total knee arthroplasties were reviewed retrospectively. Thirteen prostheses had been inserted via a medial approach and thirteen via a lateral approach. A posterior stabilized implant was used with an original technique for insertion of the patellar implant. The only difference between the groups was the approach. In the "lateral" group, the lateral approach was used to raise the tibial tuberosity and perform lateral marginal patellectomy. The tibial tuberosity was reinserted in all cases without transposition. Preoperative and 3-month postoperative radiographs (weight-bearing, AP, lateral, femoropatellar 30 degrees flexion) were reviewed. Preoperative patellar displacement was at least 5 mm. There was no difference between the two groups for age, gender, weight, height, joint motion, pre- and postoperative mechanical alignment (HKA), or preoperative patellar gliding (7.6 mm in the "medial" group and 9.7 mm in the "lateral" group). RESULTS: Recurrent patellar dislocation occurred in one patient in the "medial" group and one patient in the "lateral" group had an anterior impaction of the tibial plateau following a fall. Patellar gliding was corrected in both groups: 0.7 +/- 1.8 mm in the "medial group" and 0.0 +/- 0 in the lateral group (p > 0.05). Residual patellar tilt was +4.2 +/- 3 degrees in the medial group (lateral tilt) and -3.3 +/- 5.4 degrees in the lateral group (medial tilt) (p = 0.003). DISCUSSION: Pateller gliding was corrected irrespective of the approach. Conversely, the medial approach did not allow effective correction of patellar tilt. The lateral approach with elevation of the anterior tibial tuberosity did not increase morbidity compared with the medial approach. It enabled avoiding residual lateral patellar tilt which can be a source of patellar complications. We prefer this approach for arthroplasty on degenerated knees with lateral femoropatellar arthrosis.

Aged↗
PubMed1995

Were micrometeorites a source of prebiotic molecules on the early Earth?

"Interplanetary Dust Particles" with sizes approximately 10 micrometers collected in the stratosphere (IDPs), as well as much larger "giant" micrometeorites retrieved from Antarctic ice melt water (AMMs), are mostly composed of unequilibrated assemblages of minerals, thus being related to primitive unequilibrated meteorites. Two independent evaluations of the mass flux of micrometeorites measuring approximately 50 micrometers to approximately 200 micrometers, recovered from either the Greenland or the Antarctic ice sheets have been reported (approximately 20,000 tons/a). A comparison with recent evaluation of the flux of meteorites reaching the Earth's surface (up to masses of 10,000 tons), indicates that micrometeorites represent about 99.5% of the extraterrestrial material falling on the Earth's surface each year. As they show carbon concentrations exceeding that of the most C-rich meteorite (Orgueil), they are the major contributors of extraterrestrial C-rich matter accreting to the Earth today. Moreover they are complex microstructured aggregates of grains. They contain not only a variety of C-rich matter, such as a new "dirty" magnetite phase enriched in P, S, and minor elements, but also a diversity of potential catalysts (hydrous silicates, oxides, sulfides and metal grains of Fe/Ni composition, etc.). They could have individually functioned on the early Earth, as "micro-chondritic-reactors" for the processing of prebiotic organic molecules in liquid water. Future progress requires the challenging development of meaningful laboratory simulation experiments, and a better understanding of the partial reprocessing of micrometeorites in the atmosphere.

Antarctic Regions↗
PubMed1995

[Gluteal posterior approach for surgery of the acetabulum].

PURPOSE OF THE STUDY: This approach was developed to avoid gluteus maximus muscle injury which is divided when using the common Langenbeck-Kocher approach. The posterior perigluteal approach also provides better visualization of the posterior aspect of the acetabulum. MATERIAL AND METHODS: A semi-circular incision is made from the fascia lata at the anterior aspect of the greater trochanter and then directed to the posterio-superior iliac spine. The gluteus maxirnus is then simply retracted medially with blunt retractors. Sixty eight acetabular fractures have been operated with this approach including both mixed and complex fractures of the posterior column. Occasionally fractures of both columns have been operated in two procedures, one posterior and then a second anterior approach. RESULTS: The posterior perigluteal approach preserves gluteus maximus muscle tone. It seems to avoid post-operative ossification. CONCLUSION: We propose an approach which, compare to the Langenbeck- Kocher approach, is less traumatic, and as easy to perform.

Acetabulum↗
PubMed1989

[Functional treatment of recent fractures of the humeral shaft using the Sarmiento method].

Functional treatment of humeral shaft recent fractures by A. Sarmiento's method was described in 1977. It is based on fixation with a plaster or plastic sleeve individually molded. This sleeve keeps free the adjacent joints, allowing an early functional rehabilitation and a fast consolidation. A 50 cases serial study from 1983 to 1987, confirms the advantages of a method which allies reasonable means, safety and complete reliability to obtain a good and rapid consolidation (one case of non-union due to a technical failure), and rapidly recovered function. We had frequently resulting axial defects: 16 patients have mal-union with more than 10 degrees of angular deformity but without any functional consequences. The advantage of this method compared to usual orthopaedic, or surgical treatments leads us to propose it to most of our patients.

Adolescent↗
PubMed1983

[Complex injuries of the upper end of the 2 forearm bones].

Thirty-four cases of severe trauma to the proximal ends of both bones of the forearm have been seen. All were treated surgically. A classification is proposed related to the site of the ulnar fracture. Type I is metaphyseal and the displacement is posterior, the reverse of that of a Monteggia fracture, with a posterior dislocation of the superior radio-ulnar joint. Type II is epiphyseal with anterior displacement. The superior radio-ulnar joint is intact. Type III is metaphysio-epiphyseal with anterior displacement. Type IV is the same with posterior displacement. Fractures of the radial head are present in all cases with posterior displacement and in these types, secondary displacements and non-unions are frequent (six cases). These were related to inadequate fixation of the ulna and to resection of the radial head which led to an increased strain on the ulnar fracture. Severe limitation of movements was infrequent (five cases) and was usually seen in fractures with posterior displacement. It was related to the time of cast immobilization and to the fracture of the radial head. Fractures with anterior displacement and an associated fracture of the radial head were rare but had a better prognosis in spite of the intra-articular site of the fracture. The relevance of repair of the radial column is stressed as being as important as stable fixation of the ulnar fracture.

Adolescent↗
PubMed1983

[Brucella osteitis in children].

The authors report a case presenting with a very rare localization of brucellosis: the isolated involvement of a single bone of the metatarsus, in a child in otherwise excellent general condition. The lesions of the diaphysis and epiphyses induced a fragility of the epiphyseal cartilage and a minimal traumatism resulted in a detachment of the epiphysis which was the first clinical sign. The bacteriological examination of a sample of pus led to the early diagnosis of brucellosis, therefore allowing efficient treatment.

Brucella↗