Biomechanical study of mandibular osteosynthesis

803

Abstracts 5. Transmission of the signal 6. Computation of the results 7. Cooperation in post-operative care. The technique has now been used for more than 60 patients,

BIOMECHANKAL

M.

CHAMPY, J. P. LODDE,

STUDY OF MANDIBULAR OSTEOSYNTHESIS

D. MUSTER(I), J. H. JAEGER (2) and R.

(3)

SCHMIDT

(1) (Chirurgie Maxillo-Faciale, Hospices Civils) (2) (Centre de Traumatologie) (3) (Cole d’ingenieurs, Strasbourg, France) The use of malleable small screw-on plates (S.S.P.) in sub-apical position and without compression is demonstrated through a multidisciplinary approach as the most successful and simplest method for mandibular osteosynthesis. Among other biomechanical, mathematical and clinical experimentations, the authors stress the photoelastic study of mandibular body fractures fixed by S.S.P. and the strain evaluation by extensometric gauges in vitro and in vivo.

The results have enabled substantial reduction of that empiricism which too often directs the choice of medical therapeutics and promotion of a scientificatly worked out material well adapted to clinical use. BIOMECHANICAL

STUDIES ON PLATE PREBENDIYC AND

OF COMPRESSION

TENSIONINGANDON THE STABILITI

OSTEOSYNTHESlS

L. GOTZEN, N. HAAS and J. H~~TTER(Hannover Medical School, Trauma Dept., Hannover, Germany) OPTlMlZATlON

T.

OF OSTEOSYNTHESIS WITH EXTERNAL FlXATlON DEYICES

CONSTANT,

D. BRENET,F. LAVASTE,M. BISSER~E and G. SAILLAM (Ecole Nationale Superieure des Arts et Metiers and Hbpital Pitie Salpltriere, Paris, France)

PROPOSAL FOR A NEW METHOD OF MElTALLIC

OSTEOSYNTHESIS TO BE USED IN CASES OF

UNDERCAPITATIS FEMORAL FRACTURES

C. FEDI (Centro di Traumatologica

di Barl, Tatanto, Italia)

SESSION c

THE CAUSALITY OF ELASTIC. ELECTRICAL AND MAGNETIC FORCES IN THE HEALTHY AND THE DEFECTIFE BONE

W. KRAUS(Institut fur medizinische Physik, Munchen, Germany) RECENT EXPERIMENTAL AND CLINICAL RESULTS OF THE ELECTRODYNAMIC

FIELD-THERAPY

(DRAUS-LECHNER)

F. LECHMR and R. ASCHERL(Garmisch-Partenkirchen Germany) BONE GROWTH STIMULATION-CRITIQUE

S. G. STEINEMANN (Universiti

Hospital - Department

of Surgery,

AND ONE POINT

de Lausanne and Institut Straumann,

Switzerland)