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Bisphosphonates can block the deterioration in implant fixation after withdrawal of intermittent doses of parathyroid hormone
Linköping University, Faculty of Health Sciences. Linköping University, Department of Clinical and Experimental Medicine, Orthopaedics and Sports Medicine . Östergötlands Läns Landsting, Orthopaedic Centre, Department of Orthopaedics Linköping.
2008 (English)In: Journal of Bone and Joint Surgery, ISSN 0301-620X, Vol. 90, no 3, 400-404 p.Article in journal (Refereed) Published
Abstract [en]

We have examined the deterioration of implant fixation after withdrawal of parathyroid hormone (PTH) in rats. First, the pull-out force for stainless-steel screws in the proximal tibia was measured at different times after withdrawal. The stimulatory effect of PTH on fixation was lost after 16 days. We then studied whether bisphosphonates could block this withdrawal effect. Mechanical and histomorphometric measurements were conducted for five weeks after implantation. Subcutaneous injections were given daily. Specimens treated with either PTH or saline during the first two weeks showed no difference in the mechanical or histological results (pull-out force 76 N vs 81 N, bone volume density 19% vs 20%). Treatment with PTH for two weeks followed by pamidronate almost doubled the pull-out force (152 N, p < 0.001) and the bone volume density (37%, ANOVA, p < 0.001). Pamidronate alone did not have this effect (89 N and 25%, respectively). Thus, the deterioration can be blocked by bisphosphonates. The clinical implications are discussed. ©2008 British Editorial Society of Bone and Joint Surgery.

Place, publisher, year, edition, pages
2008. Vol. 90, no 3, 400-404 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-44305DOI: 10.1302/0301-620X.90B3.19544Local ID: 76211OAI: diva2:265167
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2011-01-10

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Aspenberg, Per
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Faculty of Health SciencesOrthopaedics and Sports Medicine Department of Orthopaedics Linköping
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