Lee Dong-Won, Choi Young-Shill, Park Kwang-Ho, Kim Chang-Sung, Moon Ik-Sang
Department of Periodontology, Yongdong Severance Hospital, College of Dentistry, Yonsei University, Seoul, Korea.
Clin Oral Implants Res. 2007 Aug;18(4):465-70. doi: 10.1111/j.1600-0501.2007.01302.x. Epub 2007 Apr 18.
The purpose of the present study was to evaluate the long-term effect of the microthread on the maintenance of marginal bone level.
Seventeen patients were selected and two types of Astra Tech implants were installed, with the Microthread on the coronal portion of the fixture [Astra Tech Single Tooth Implant (ST)] or without the Microthread [Astra Tech TiOblast Implant (TB)]. ST and TB were installed adjacent to each other within the same partially edentulous sites and marginal bone loss was evaluated by radiographic image. The marginal bone-level alteration of the each fixture after prosthesis insertion was analyzed.
The marginal bone loss of ST and TB differed significantly during the observation period (P<0.01). Marginal bone levels of both ST and TB were stabilized after 1 year of lading.
The Microthread might have an effect in maintaining the marginal bone loss against loading.
本研究的目的是评估微螺纹对边缘骨水平维持的长期影响。
选取17例患者，植入两种类型的Astra Tech种植体，一种在种植体冠部带有微螺纹[Astra Tech单颗牙种植体（ST）]，另一种没有微螺纹[Astra Tech TiOblast种植体（TB）]。ST和TB在同一部分牙列缺损部位相邻植入，通过影像学图像评估边缘骨丧失情况。分析义齿植入后每个种植体的边缘骨水平变化。
在观察期内，ST和TB的边缘骨丧失有显著差异（P<0.01）。负重1年后，ST和TB的边缘骨水平均稳定。
微螺纹可能在抵抗负重维持边缘骨丧失方面有作用。
