97 research outputs found
Is the rotation of the femural head a potential initiation for cutting out? A theoretical and experimental approach
We conclude the center-center position in the head of femur of any kind of lag screw or blade is to be achieved to minimize rotation of the femoral head and to prevent further mechanical complications
Standardised cement augmentation of the PFNA using a perforated blade: A new technique and preliminary clinical results. A prospective multicentre trial
Producción CientíficaPertrochanteric fractures are a rising major health-care problem in the elderly and their operative
stabilisation techniques are still under discussion. Furthermore, complications like cut-out are reported
to be high and implant failure often is associated with poor bone quality. The PFNA1 with perforated
blade offers a possibility for standardised cement augmentation using a polymethylmethacrylate
(PMMA) cement which is injected through the perforated blade to enlarge the load-bearing surface and
to diminish the stresses on the trabecular bone. The current prospective multicentre study was
undertaken to evaluate the technical performance and the early clinical results of this new device.
In nine European clinics, 59 patients (45 female, mean age 84.5 years) suffering from an osteoporotic
pertrochanteric fracture (Arbeitsgemeinschaft fu¨ r Osteosynthesefragen, AO-31) were treated with the
augmented PFNA1. Primary objectives were assessment of operative and postoperative complications,
whereas activities of daily living, pain, mobility and radiologic parameters, such as cement distribution
around the blade and the cortical thickness index, were secondary objectives.
The mean follow-up time was 4 months where we observed callus healing in all cases. The surgical
complication rate was 3.4% with no complication related to the cement augmentation. More than onehalf
of the patients reached their prefracture mobility level within the study period. A mean volume of
4.2 ml of cement was injected. We did not find any cut-out, cut through, unexpected blade migration,
implant loosening or implant breakage within the study period.
Our findings lead us to conclude that the standardised cement augmentation using the perforated
blade for pertrochanteric fracture fixation enhances the implant anchorage within the head–neck
fragment and leads to good functional results
Improved lag screw positioning in the treatment of proximal femur fractures using a novel computer assisted surgery method: a cadaveric study
Standardised cement augmentation of the PFNA using a perforated blade: A new technique and preliminary clinical results. A prospective multicentre trial
Sind extramedulläre und intramedulläre Standardverfahren (DHS/PFN A/Gamma 3 Nagel) im Experiment bei pertrochantären Femurfrakturen gleich stabil?
Klinische und radiologische Untersuchung nach zementfreier Hüfttotalendoprothese unter besonderer Berücksichtigung des frühpostoperativen Belastungsmodus.
Einfluss der Knochenzement-Augmentation auf Rotationsstabilität und Ausrisskraft beim proximalen Femurnagel
Einfluß der intraoperativen Blutsperre auf die postoperativen Ergabnisse nach Frakturen des oberen Sprunggelenkes
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