[Treatment of acromio-clavicular dislocations using coracoacromial ligament plasty].

Purpose: Plasty transfer using the coracoacromial ligament (Cadenat) for the treatment of acromioclavicular separation is usually too weak and too short. The authors used a reinforcement flap, made by a lateral supraclavicular detachment of the superior fibrous-capsular sheath.

Material And Method: Twenty-six acromioclavicular separations were radiographically studied using an axillary view.

[Locked nail plate: a new treatment for unstable pertrochanteric fractures].

Purpose Of The Study: This work is the outcome of a preliminary study on pertrochanteric fractures which showed that impaction with simple nail plates (SNP) was lead by hypercorrection in valgus demineralization and malposition of the nail in the femoral neck. To improve anchoring of the nail in the cervico-cephalic part, the authors propose to use a locked nail-plate (LNP), an innovative device based on the addition to the normal nail plate, of a screw securing neck and nail.

Mechanical Study: Mechanical flexion and compression tests carried out on 8 pairs of femurs of fresh cadavers showed comparable rigidity for the two mounting, SNP and LNP.

[Evaluation of impaction on bone nail and bone plate of the pertrochanteric fracture].

Purpose Of The Study: Impaction in pertrochanteric fracture sites is a well known phenomenon; the screw-plate system is designed to stabilise the fracture. Although easier to use, the risk with the nail-plate system is postoperative penetration of the nail into the joint. The present study was conducted to determine the exact conditions of the impaction, and to identify possible ways to improve the nail-plate system.

[Type II fractures].

Ninety-seven patients type II were in this study. There were 35 male and 53 female patient, whose average age at revision was 74,5 year old. In this group the average time to fracture after arthroplasty was 6,2 (1-20) years.

Locked intramedullary flexible osteosynthesis. A mechanical and clinical study of a new pin fixation device.

We report the use of a new method of locked intramedullary flexible osteosynthesis (LIFO) in the treatment of 118 unstable fractures of the femur and tibia. The implant utilises a set of flexible pins with a separate locking device for their proximal ends. The LIFO system proved capable of stabilising unstable fractures, and most of the complications occurred during the early testing.