Warrer L, Gotfredsen K, Hjørting-Hansen E, Karring T
Department of Periodontology and Oral Gerontology, Royal Dental College, Arhus, Denmark.
Clin Oral Implants Res. 1991 Oct-Dec;2(4):166-71. doi: 10.1034/j.1600-0501.1991.020402.x.
The aim of the present study was to explore the possibility of achieving osseointegration of dental titanium implants, inserted into alveoli immediately after tooth extraction, by covering the recipient site with a teflon membrane. In each of 7 monkeys, mucoperiosteal flaps were raised on the buccal and palatal aspects of the maxillary molars in both sides of the jaw. The second molars were then extracted and self tapping titanium implants of the screw type (Astra Dental Implants) were inserted into the sockets of the largest roots. In the coronal portion of the sockets, a void was always present between the implant and the socket walls. In one side of the jaw, a membrane (Gore-Tex Augmentation Material) was adjusted to cover the implant. The implant in the other side of the jaw served as control and was only covered by the tissue flaps. Microscopic analysis after 3 months of healing revealed that soft tissue was facing the coronal portion of the implants to a varying degree in the control side, while osseointegration was consistently observed to the top of the membrane-covered implants which remained submerged throughout the experimental period. The results suggest that the membrane technique can secure complete osseointegration of implants inserted immediately into extraction sockets.
本研究的目的是探讨通过用聚四氟乙烯膜覆盖受植部位，实现拔牙后立即植入牙槽窝的牙科钛种植体骨结合的可能性。在7只猴子的每只中，在上颌磨牙颊侧和腭侧掀起黏骨膜瓣。然后拔除第二磨牙，并将自攻型螺旋式钛种植体（Astra牙科种植体）植入最大牙根的牙槽窝内。在牙槽窝的冠部，种植体与牙槽窝壁之间始终存在空隙。在一侧颌骨，调整一片膜（戈尔特斯增强材料）覆盖种植体。颌骨另一侧的种植体作为对照，仅被组织瓣覆盖。愈合3个月后的显微镜分析显示，对照侧的软组织在不同程度上面向种植体的冠部，而在整个实验期间一直处于埋没状态的膜覆盖种植体顶部则始终观察到骨结合。结果表明，膜技术可确保立即植入拔牙窝的种植体实现完全骨结合。
