Mangano Carlo, Piattelli Adriano, Mangano Francesco, Perrotti Vittoria, Iezzi Giovanna
Dental School, University of Varese, Italy.
Implant Dent. 2009 Apr;18(2):142-50. doi: 10.1097/ID.0b013e318192cbe5.
Immediate loading of dental implants inserted into fresh postextraction sites has recently been proposed as a novel but challenging surgical approach. However, histological evidence and comparative data are still missing. The aim of this study was an histological and histomorphometrical comparison of submerged and immediately loaded dental implants with a new modified acid etched surface inserted into postextraction sites of nonhuman primates.
Thirty-two implants were placed in postextraction sockets of 4 adult Chacma Baboons (papio ursinus). Each baboon received 8 implants: 4 submerged and 4 immediately loaded. The implants were retrieved after 90 days of healing with a 4-mm trephine bur and processed for histology and histomorphometry.
The bone-to-implant contact percentage in the submerged and immediate loaded implants was 86.02% and 86.85%, respectively, with no statistically significant differences. In the immediately loaded implants a greater amount of ongoing remodeling was observed.
Immediate loading seemed to be a valid alternative to conventional technique when a implant is inserted into postextraction sockets. Further comparative studies on a greater number of samples are necessary to confirm our findings.
将牙种植体即刻植入新鲜拔牙位点最近被提出作为一种新颖但具有挑战性的手术方法。然而，组织学证据和比较数据仍然缺失。本研究的目的是对植入非人类灵长类动物拔牙位点的、具有新改良酸蚀表面的潜入式和即刻加载牙种植体进行组织学和组织形态计量学比较。
在4只成年查卡马狒狒（山魈）的拔牙窝中植入32颗种植体。每只狒狒植入8颗种植体：4颗潜入式和4颗即刻加载式。愈合90天后，用4毫米环钻取出种植体并进行组织学和组织形态计量学处理。
潜入式和即刻加载式种植体的骨-种植体接触百分比分别为86.02%和86.85%，无统计学显著差异。在即刻加载式种植体中观察到更多正在进行的骨改建。
当种植体植入拔牙窝时，即刻加载似乎是传统技术的一种有效替代方法。需要对更多样本进行进一步的比较研究以证实我们的发现。
