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Biomedical subjects

P Lintner

Publications and source records attributed to P Lintner.

6 recordsLinked to original sources
PubMed1980

[Cortico-cancellous grafts in infected defect-pseudarthrosis].

Biomechanical studies of stabilizing effect of cortico-cancellous-grafts showed that the resistance of internal fixation is not endangered acutely under a one-foot weight bearing situation. The stability of defectosteosynthesis was significantly raised not only when a lateral joist was left but also when a medial cortico-cancellous-graft was fixed. 29 patients with chronical defectosteitis were treated by internal fixation and cortico-cancellous-grafts on the opposite side to improve mechanical stability and to place biological material for bridging.

Adolescent↗
PubMed1979

[In vitro study of isolated chondrocytes concerning the prognosis of transplanted cartilage].

In order to find out reliable criteria to conclude on the prognosis of transplanted cartilage the quality of isolated rabbit chondrocytes was assayed in vitro. Using a semisolid medium a culture system is introduced, which is able to detect colony forming units of chondrocytes. Furthermore their proliferative and differentiating capacity was investigated. Colony formation in vitro follows a strict dose response relationship. An inverse relationship was observed between the age of the donor and the colony incidence in vitro. Cells from neonatal cartilage could be induced to grow as fibroblastic colonies in the presence of conditioned medium from fibroblastic monolayer cultures. No effect, however, could be observed with chondrocyte derived conditioned medium.

Age Factors↗
PubMed1978

[Stability after obtaining cancellous bone from the greater trochanter].

To test the endangered stability after obtaining cancellous bone from the greater trochanter, the ultimate breaking force of 40 human femura was measured with a material testing machine (Instron 1115). 1. 10 Femura after removing bone from the greater trochanter as a routine clinical procedure showed a significantly reduced trochanteric stability (p less than 0.05), 4 subtrochanteric and 3 pertrochanteric fractures, compared to 10 intact opposite femura with vertical shear fractures of femural neck and head without damage to the trochanteric region. 2. The number of fractures crossing the window was reduced by half, p less than 0.05 when a round cortical window compared to when a square window of the same area was cut. As the reduced stability caused by the remove of cancellous bone can not be avoided, we can clearly reduce the danger of stress concentration in the notches by cutting a round corticalis window. Cancellous bone from the greater trochanter should only used, if it cannot be taken from the brim or posterior iliac spine of the pelvis.

Biomechanical Phenomena↗
PubMed1977

[Biomechanical studies on the stabilization effect of cortico-spongiosa chips in imperfect osteosynthesis].

Stability and plate strain of internally fixed femoral shaft fractures at different sites were tested under bending and compression loads. Stability of osteosynthesis with compression plate was not acutely affected by stresses encountered when standing on one leg. When fractures with a bone defect were treated by plate fixation stability was improved significantly when lateral support was preserved or when a medial cortico-spongious bone chip was used.

Adult↗