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PubMed1979

[Studies of femoral neck fractures--biomechanical experiments with various devices for internal fixation with follow-up study on clinical cases-- (author's transl)].

The Tri-cancellous compression screw method was developed in order to overcome some defects which we feel exist in other methods of fixation presently in use. The author has conducted studies on the stability of the Tri-cancellous compression screw method and on the results of its clinical use. The conclusions are as follows: 1) In compression and torsion tests, the Tri-cancellous compression screw method showed greater strength than other methods. 2) The holding strength in cancellous bone of the screw is determined solely by its outside diameter and is never influenced by its thread profile and pitch. 3) The stability of the Tri-cancellous compression screw method decreases every hour postoperatively. 4) Clinically, when the Tri-cancellous compression screw method was correctly used, we found no evidence of the development of non-union. However, late segmental collapse has remained a problem of the same level as when other methods are used.

Aged↗
PubMed1979

[Osteosynthesis with compression as an alternative method in the internal fixation of malleolar fractures].

The authors discussed a group of patients with malleolar fractures operated on between 1974 and 1977. Compressive osteosynthesis was used as an alternative method of treatment. They compared their group of patients with a much larger group of patients that were surgically treated for malleolar fractures in the traumatology clinic in Ljublana between 1974 and 1977. This second group was divided according to the type of fracture, the type of surgical treatment, the time of treatment, and early and late complications. The authors also discussed the specifics of early postoperative functional treatment. The evaluations of the end results were based on regular control examinations including those patients in whom treatment was complete and were statistically documented. The authors statistics showed very good results in 49%, good results in 20%, and poor results in 31% of the cases. The authors consider the advantages of osteosynthesis with compression over and above the other well known methods of inner fixation, and listed the indications and spectrum of application of this method in the surgical treatment of malleolar fractures.

Female↗
PubMed1980

[Area of contact between osteosynthesis plate and bone in internal fixation (author's transl)].

The bone can be protected against excessive stress if the plate is properly adapted to the surface of the contact area between plate and bone, thus ensuring good and longlasting repositioning of the fracture. The article describes an in-vitro method for the quantitative evaluation of the contact area between plate and bone in osteosynthesis. With four different bones and the requisite plates, six expert surgeons were able to obtain an area of contact between plate and bone which varied between 13 and 60%, the average being 32%. The available data allow us to conclude that the peak loads of pressure occurring with small contact areas may be so great that they exceed the maximum compressive strength of the bone.

Bone Plates↗
PubMed1980

[Late septic complications of internal fixations (author's transl)].

The review of the authors' 5 year material (from 1971 to 1975) showed 5 late latent septic complications. The average time in which septic signs became evident, was 7.7 months in their cases. Attention is drawn to certain inadequacies during operations, which may have a role in the aetiology of these infections, and to the importance of the correct assessment of the follow-up X-rays.

Adult↗