Wigianto R, Ichikawa T, Kanitani H, Kawamoto N, Matsumoto N, Ishizuka H
Department of Removable Prosthodontics, University of Tokushima, School of Dentistry, Japan.
Clin Oral Implants Res. 1999 Jun;10(3):219-25. doi: 10.1034/j.1600-0501.1999.100305.x.
Long-term support of dental implants requires adequate bone thickness in the area surrounding the implant. A three-dimensional examination, including calculations of percent bone-implant contact and percent bone volume, was conducted to clarify the bone structure around pure titanium (Ti) and dense hydroxyapatite (HA) implants. The implants were installed in the tibiae of rabbits, and the bone structure was examined after 2, 4, 6 and 8 weeks. The bone formation following implantation differed in the cortical bone and cancellous bone areas. In the cortical bone area, the percent bone-implant contact and percent bone volume were comparatively consistent for both Ti and HA implants during the observation period. In the cancellous bone area, both findings were influenced by the implantation period, and the chronological bone structure in the cancellous bone area also differed between Ti and HA implants. The percent bone-implant contact and percent bone volume in the Ti implant increased over 8 weeks, whereas the dense HA implant increased for the first 4 weeks and then decreased. The implant materials, Ti and HA, affected the bone remodeling in the cancellous bone area.
种植牙的长期支撑需要种植体周围区域有足够的骨厚度。进行了三维检查，包括计算骨-种植体接触百分比和骨体积百分比，以阐明纯钛（Ti）和致密羟基磷灰石（HA）种植体周围的骨结构。将种植体植入兔胫骨，在2、4、6和8周后检查骨结构。植入后的骨形成在皮质骨和松质骨区域有所不同。在皮质骨区域，观察期内Ti和HA种植体的骨-种植体接触百分比和骨体积百分比相对一致。在松质骨区域，这两项指标均受植入时间的影响，Ti和HA种植体的松质骨区域随时间变化的骨结构也有所不同。Ti种植体的骨-种植体接触百分比和骨体积百分比在8周内增加，而致密HA种植体在前4周增加，然后下降。种植材料Ti和HA影响了松质骨区域的骨重塑。
