Biomedical subjects

F Langlais

Publications and source records attributed to F Langlais.

80 records · Page 5Linked to original sources

PubMedDate not supplied

[Reconstruction prosthesis after upper epiphyseal and diaphyseal resection of the femur for tumor. Results of 16 cases and a biomechanical study].

The authors have treated 16 cases of tumours of the upper end of the femur by resection over at least 12 centimetres and insertion of a massive prosthesis. The tumour was secondary in 9 cases and primary in 7. This treatment was used for metastases where conservative surgery was impossible or had failed. In primary tumours, when the excision was very extensive, the main problem was of stability of the prosthesis and its long-term future. A new type of total massive prosthesis, designed by the authors after biomechanical studies, is described.

Biomechanical Phenomena↗

PubMedDate not supplied

[Intertrochanteric osteotomies. A critical study of the clinical radiologic evaluation].

The authors describe the technique that they have used in approximately 500 intertrochanteric osteotomies of the femur. The technique was satisfactory in the production of bony union but in ten per cent of cases there were errors of correction of 5 degrees or more. An analysis of errors related to the radiological technique used showed that a number of conditions (flexion, abduction) modify the angles of inclination and anteversion. A number of instances of degenerative arthritis had been incorrectly attributed to increased coxa valga. An analysis is made of the difficulties encountered when correction is required in two planes, especially when there is fixed flexion or significant anteversion. Some suggestions are made concerning improvements in technique.

Femur↗

PubMedDate not supplied

[Reconstructive surgery of the thumb after traumatic amputation (author's transl)].

The authors analysed the results of two series of patients treated either by lengthening (16 cases) or digital pollicization (45 cases). The conclusions about the indications for the two techniques are as follows: When the amputation is proximal and the sole lesion, pollicization of the ring finger is preferred. In distal amputations in children, pollicization is still indicated, but in adults, lengthening, with a pedicle island-flap to give sensation is preferable. In amputations of the thumb associated with lesions of other digits, pollicization is not feasible; in these cases, the authors recommend a toe transplant using micro-surgical technique.

Adolescent↗

PubMedDate not supplied

[The results of valgus osteotomy in severe osteoarthritis of the hip (author's transl)].

The authors analysed 150 consecutive cases of valgus osteotomy (Pauwels II) performed in cases of very severe osteoarthritis, and followed up for 3 to 10 years (average 6 years). The quality and the permanency of the results depend mainly on the morphology of the osteoarthritic hip. A satisfactory clinical and radiologic result is attained when the stresses in the joint have been reduced by improving the congruity of the joint surfaces using the cephalic medial osteophyte as part of these, and thus increasing the weight bearing surfaces. In osteoarthritis secondary to dysplasia (single dysplasia, subluxation, or luxation with support: 49 cases) valgus osteotomy gave 77 p. 100 good results, with 83 p. 100 painfree hips. This result persists 10 years (or more) for women operated before 50 years of age. The results are good in primary osteoarthritis occuring in active age (83 cases). When the hip was extruded by acetabular and cephalic osteophytes, 60 p. 100 good results, with 81 p. 100 painfree hips, have been obtained. In protrusive osteoarthritis and coxa profunda (18 cases) the valgus osteotomy slightly improved the range of movement but the relief of pain was usual (88 p. 100) and durable. The causes of failure (lack of mechanical improvement, osteoarthritis resulting more from biological disturbance--primary osteoarthritis--rather than from mechanical causes, influence of the age) have been sought for.

Adult↗

PubMedDate not supplied