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J Dent Res. 2010 Jun;89(6):581-6. doi: 10.1177/0022034510363263. Epub 2010 Mar 8.

Bone particles and the undersized surgical technique.

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Department of Periodontology and Biomaterials, Radboud University Nijmegen Medical Centre, PO Box 9101, 6500 HB Nijmegen, the Netherlands.


During the installation of implants, osteogenic bone particles are translocated along the surface. These particles may contribute to peri-implant bone healing. Based on this phenomenon, it is hypothesized that implants placed with undersized drilling, besides showing higher primary-implant stability, also enhance the amount and osteogenic responses of these bone particles. Biocomp implants were inserted into bicortical fresh-cadaver bone by a press-fit or an undersized surgical technique, and peak-insertion torque values (ITV) were measured. After explantation, the implants were incubated in culture medium up to 24 days. Histology, bone-implant contact (BIC), micro-CT, scanning electron microscopy (SEM), and calcium (Ca) measurements were performed. ITV were significantly higher for implants placed with an undersized technique. Moreover, histology, BIC, micro-CT, SEM, and Ca measurements confirmed the presence of more bone-like tissue on implants inserted with an undersized technique. The undersized surgical technique not only results in higher primary-implant stability, but also induces more translocated bone particles, thus having a positive influence on the osteogenic response.

[Indexed for MEDLINE]

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