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Biomedical subjects

J H Jaeger

Publications and source records attributed to J H Jaeger.

At least 37 records · Page 2Linked to original sources
PubMed1976

[Nailing according to Ender. Biomechanical study and results of 120 cases].

The authors have conducted a clinical and biomechanical study of blind nailing of trochanteric fractures by the Ender's technique. The nail is introduced through the medial femoral condyle. The study was based on 120 operations. From the biomechanical standpoint, the authors studied the forces exerted in the medullary canal of the femoral shaft and the grip of the nail in the head and neck of the femur. In most of the cases the technique allowed immediate walking with weight-bearing. The results are compared with those obtained after nail-plate fixation. They were superior on three counts--less infection, less breakage of inserted material and less non-union, but the technique produced more mal-union. For this reason, the authors consider it to be an excellent technique but to be reserved for older patients.

Biomechanical Phenomena↗
PubMed1975

[External rotational instability of the knee].

Among cases of recent or long-standing post-traumatic laxity of the knee ligaments, unstable lateral rotation is due to a well-defined anatomical lesion, viz. Rupture of the medial capsular ligament of the knee. This laxity is demonstrated clinically by the existence of an abnormal postero-anterior movement when the tibia is in lateral rotation. Its surgical treatment, suggested by D. Slocum, consists of displacement of the patella tendon. This rupture may exist alone but, usually, is associated with other ligamentous or meniscal lesions for which further specific treatment should be carried out. Slocum's operation has recently been used in the Strasburg Accident Centre. The early results are encouraging.

Adolescent↗
PubMed1975

[Valgus fixation of trochanteric fractures in elderly patients. Early weight-bearing walking. Apropos of 25 cases].

The authors have treated 25 unstable trochanteric fractures in old people by valgus osteotomy and nail-plate fixation. In 6 cases a medial translation was added. Walking with weight bearing was started 7 to 14 days after the operation. The results were satisfactory in only 14 cases. The authors think that this type of fixation is logical on a bio-mechanical standpoint. However they conclude that the procedure is not fiable enough.

Age Factors↗
PubMedDate not supplied

[Mandibular osteosynthesis according to the Michelet technic. I. Biomechanical bases].

Experiments performed in collaboration with a group of engineers lead to following affirmations: - mandible's external cortex is strong enough to endure strains resulting from screws, - osteosynthesis plate must be screwed in high position, - the material elaborated according to biomechanical data appears constantly reliable despite more marked miniaturization and improved malleability.

Biomechanical Phenomena↗
PubMedDate not supplied

[Mandibular osteosynthesis according to the Michelet technic. II. Presentation of new material. Results].

The purpose of this communication is: - To report the conclusions of a critical study realized in collaboration with a group of engineers and concerning some presently obtainable osteosynthesis materials. - To ascertain mechanical characteristics required by screws and plates used for this type of surgery. - To relate a 4 years experience concerning 130 osteosynthesis (32 performed with a new material worked out according to biomechanical data).

Biomechanical Phenomena↗