Bone level change of extraction sockets with Bio-Oss collagen and implant placement: A clinical study

Aims: To compare the reaction of the alveolar bone to the preservation of the extraction socket by Bio-Oss Collagen with and without combination of implant treatment. To evaluate whether early implant insertion 8-10 weeks thereafter could be a suitable time point for long term bone stability around the implant. Methods: A total of 25 patients were divided into three groups: The first group (seven patients) received Bio-Oss Collagen after extraction and 8-10 weeks later an implant, the second group (eight patients) received only Bio-Oss Collagen without implantation thereafter, while the third group was considered as a control (eleven patients), where the sockets healed without any treatment. The change in the vertical bone level of the alveolar crests were measured, from panoramic radiographs and statistically analysed. Results: Bone level change was significantly less for Group 1 than Group 3 (P < 0.001), while was not significantly different for Group 2 and Group 3 (P = 0.23). However, the rate of bone level change per year was statistically smaller for Group 1 compared to Group 3 (P = 0.019) and as well as for Group 1 than for Group 2 (P = 0.003), whereas the change per year was not significantly different for Group 2 vs. Group 3 (P = 0.122). Conclusion: Bone level preservation of extraction sockets using Bio-Oss Collagen with implantation is significantly better compared to using Bio-Oss Collagen only and untreated sockets. Implant insertion 8-10 weeks after extraction is a suitable time point after socket augmentation. (c) 2011 Elsevier GmbH. All rights reserved.