Comparison of early osseointegration of SLA® and SLActive® implants in maxillary sinus augmentation: a pilot study
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Objective: To assess the impact of a hydrophilic implant surface (SLActive ) placed into augmented maxillary sinuses on bone-to-implant contact (BIC) and surrounding tissue composition when compared to a hydrophobic surface (SLA ). 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 ) and test implant (SLActive ). 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.
Clinical Oral Implants Research
This publication has been entered into Griffith Research Online as an Advanced Online Version.
Dentistry not elsewhere classified