Archiv fur orthopadische und Unfall-Chirurgie最新文献

Comparing radiographies we have examined the degree in which the static angles of the knee are affected, because of a fault projection under the influence of some factors. We have found that an inwards or an outwards turn, even of a small degree (IQ), a bending or preexistent (pathological) anomalies, each alone or in combination, affected the right projection of the angles in a face radiography. Physiological knees possibly are presented like "varum" or "valgum" projectional. It is clear that the right position during the taking of the radiography is of a great significance in order to decide about the indication of osteotomy and to determine the degree of correction. We suggest as a criterion of the right radiographies the factor "patellacondylus".

Osseous ruptues of the ulnar collateral ligament in the metacarpophalangeal joint of the thumb are to be found more frequently in experimental ruptures at an isolated preparation than they are described in clinical examinations. It must positively be achieved to re-affix also a small avulsion fragment to do not remove the entire compound attachment of the ligament. The own surgery technique is described.

This paper presents a study of long-term results of femoral head replacement. 104 patients with Moore prosthesis could be followed up for an average of 9 1/2 years. In cases of fractures and complications of trauma the results were excellent and good in 65%. Practically 100% poor results could be shown in patients with osteoarthritis

On the basis of 77 cases report is given on the treatment of chronic synovitis of the knee in rheumatoid arthritis with radioactive isotopes. Gold 198 and Yttrium90 have been applicated. During an observation period up to 6 years a follow-up on 46 knee joints has been carried out. Very good and good results could be achieved in 50% of these cases.

Method of direct geometrical X-ray magnification technique are discussed in the light of new technical possibilities,--fine-focus, high speed screen--and- the value in surgical X-ray diagnosis for the fine bone structure changes is demonstrated using practical examples. Also mentioned are other methods for a quirering a better form of diagnosis--such as for example the harmonising method.

The knowledge of post surgery strain is of fundamental significance for dimension and location of application of osteosynthesis. In the following biomechanical research height and direction of moments of flexure will be determined that occur during sleep and/or anaesthesia without additional and at partially loaded early mobilisation with the muscle activity at course of doppel step at upright- and swing-leg position. Moments of flexure are calculated at frontal and sagittal level considering efficiency of weights of parts of the leg and their centres of gravity as well as bending efficiency of the active muscle groups. Thus, moments of flexure resulting important facts are found for dimenstion of osteosynthesis equipments.

In this paper the revascularisation pattern of the dog tibia diaphyse following osteotomy and plate osteosynthesis with subsequent osteomyelitis is described at various stages. As compared to undisturbed plate osteosynthesis the differences and conformities in revascularisation are shown. It is attempted to interpret the vessel behaviour under clinical aspects.

By means of compression plate osteosynthesis, of the lateral tension band and of the treatment with external chucks the main demand for stability of osteosynthesises is derivated: by adjustified, in the resultant axial tension of the metal implantats is to produce only pressure in the entire fracture zone without detrimental osteosynthesis induced excentric powers. The joint biomechanic aspects of the three methods are worked out.

A self-adhesive prosthesis for youth patients is developed by Mittelmeier that is implanted without bone cement. After an implantation term of 1 year in animal experiment (dog), an adapted femur is compared with the contra-lateral normal femur. Strain gauges are used to determine bone strain under load. Further is determined external and internal construction change after endoprosthesis. The construction changes found are in connection with the changed bone strength. A cancellous change of bone at entire area of stem of prosthesis is called a "metaphysation" of bone shaft.