[Fibrous dysplasia of the proximal femur in children and teenagers: surgical results in 22 cases].

Purpose Of The Study: Fibrous dysplasia is a rare benign bone tumor which occurs preferentially in the proximal femur. In children, there is a risk of repeated fractures and coxa vara deformity, particularly in the polyostotic form. The most common orthopedic problem is fibrous dysplasia of the proximal femur which generally requires surgical treatment.

[Scarf osteotomy for the treatment of hallux valgus: a review of 123 cases with 4.8 years follow-up].

Purpose Of The Study: Many different osteotomies can be used for the treatment of hallux valgus. The purpose of this study was to evaluate the Scarf osteotomy associated or not with phalangeal osteotomy and to search for deformation cutoff points beyond which corrections appear to be difficult to achieve.

Material And Methods: This retrospective analysis included 87 patients (123 feet) among 130 who underwent hallux valgus surgery between October 1993 and November 2000.

Biomechanical study and digital modeling of traction resistance in posterior thoracic implants.

Study Design: Posterior implants were used to test the resistance of seven human thoracic spines to traction, and results were compared with those of a digital study.

Objectives: To compare the use of hook and screw fixation methods for posterior thoracic surgery in a study supplemented by a digital analysis using the finite-element method.

Summary Of Background Data: The maximum break strength of pedicular screws on bone has already been studied several times.

[Biomechanical study and digital modeling of traction resistance in posterior thoracic implants].

Purpose Of The Study: The purpose of this experimental study was to compare posterior fixation systems using hooks and screws implanted in the thoracic spine. This study was completed by a digital analysis using the finished element method.

Material And Methods: For the experimental study, we used 7 human thoracic spines.