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Effects of impaction on cement mantle and trabecular bone in hip resurfacing
Publikationstyp
Journal Article
Date Issued
2011
Sprache
English
Author(s)
Knifka, Jutta
Röllinghoff, Marc
Koebke, Jürgen
Eysel, Peer
Volume
131
Issue
4
Start Page
459
End Page
464
Citation
Archives of Orthopaedic and Trauma Surgery 131 (4): 459-464 (2011)
Scopus ID
Publisher
Springer
Introduction: Failures involving the femoral part in hip resurfacing remain problematic in terms of overall implant survival. In this context, effects of impaction strength on cement mantle morphology and trabecular bone damage have not been studied to date. Materials and methods: Sixteen paired cadaveric femora that had undergone hard and gently impacted hip resurfacing using a manual packing cementing technique in a previous study, were evaluated morphologically. The earlier study had revealed lower failure loads for hard impacted heads. A central slice of each femoral head underwent microradiography. Results: Overall cement mantle thickness averaged 2.0 mm (range 0-5 mm) in the hard and in the low impact group with no significant difference between groups (p = 0.299). No signs of damage in the bone remnants inside the prosthesis of the fractured proximal femurs were detected in the microradiographic analysis. Conclusion: Cement mantle thickness was not influenced by impaction strength when using a manual packing cementing technique. No trabecular damage underneath the implant was detected despite lower failure loads, confirming the difficulty to identify small trabecular damage in an in vitro study.
Subjects
Cementing technique
Cement mantle
Hip resurfacing
Impaction
Morphology
DDC Class
570: Life Sciences, Biology
610: Medicine, Health