科研之友
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摘要
Objective: To assess the impact of a hydrophilic implant surface (SLActive (R)) placed into augmented maxillary sinuses on bone-to-implant contact (BIC) and surrounding tissue composition when compared to a hydrophobic surface (SLA (R)). Material and methods: Four sheep underwent bilateral sinus augmentation. Each sinus received anorganic bovine bone mineral + autogenous bone (ABBM + AB). Sixteen implants were subsequently placed 12 weeks postgrafting with each sinus receiving a control (SLA (R)) and test implant (SLActive (R)). Two animals were sacrificed at 2 weeks and another two animals were sacrificed at 4 weeks postimplantation. The eight sinuses and 16 implants were processed for histomorphometry, which assessed bone-to-implant contact (% BIC) and tissue elements (woven bone - WB, lamellar bone - LB, soft tissue - ST) in the interthread region of implants within the augmented sinus. Results: There was a statistically significant increase in % BIC at week 4 compared to the week 2 animals in both test (P < 0.005) and control (P < 0.005) groups. There was a statistically significant greater % BIC around test implants when compared to control implants in both week 2 (P < 0.05) and week 4 animals (P < 0.05). Greater % WB (11.17% +/- 6.82) and % LB (11.06% +/- 3.67) were seen in the test implants when compared to the control implants independent of time. This was only statistically significant for % LB (P < 0.05). A statistically significant reduction of 16.78% (+/- 6.19) in % ST was noted in test implants when compared to control implants (P < 0.05) independent of time. Conclusion: Both time and the use of hydrophilic implant surface had a positive impact on % BIC around implants placed into augmented maxillary sinuses. Hydrophilic implant surfaces also had a positive impact on surrounding tissue composition. Larger trials are needed to better assess and detect differences between these two surfaces in augmented maxillary sinuses.
- 出版日期2017-11
