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Volume 24 , Issue 4
July/August 2009

Pages 734739

Early Bone Formation Around Immediately Restored Implants With and Without Occlusal Contact: A Human Histologic and Histomorphometric Evaluation. Case Report

Marco Degidi, MD, DDS/Adriano Piattelli, MD, DDS/Jamil A. Shibli, DDS, MS, PhD/Vittoria Perrotti, DDS, PhD/Giovanna Iezzi, DDS, PhD

PMID: 19885416

Human biopsy of immediately loaded implants is the most definitive means to determine the occurrence of osseointegration. This case report discusses the histologic and histomorphometric analysis of the bone-titanium interface in immediately restored implants with and without occlusal contact, retrieved after a healing period of 5 weeks. The two implants had been inserted in the posterior mandible; both were freestanding. One implant had been put into functional loading (in occlusal contact) with a fixed provisional prosthesis on the day of implant surgery (implant A), whereas the other implant was restored without occlusal contact (implant B). Both implants were retrieved with a 5-mm trephine after 5 weeks. Before retrieval, both implants appeared to be clinically osseointegrated, and no mobility was present. Both implants were surrounded by newly formed bone lamellae. In both implants about 0.5 to 1 mm of pre-existing and newly formed bone was found coronal to the implant shoulder, with no resorption of the pre-existing coronal bone. The bone-implant contact percentage in implant A was 51.2% 4.5%, whereas in implant B it was 55.1% 2.3%. Within the limitations of this study, the histologic findings indicated that no differences were found in the histologic response around immediately restored implants with and without occlusal contact. Int J Oral Maxillofac Implants 2009;24:734739

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