Matsuzaka Kenichi, Nakajima Yasushi, Soejima Yoshikazu, Kido Hirofumi, Matsuura Masaro, Inoue Takashi
Oral Health Science Center HRC7, Department of Clinical Pathophysiology, Tokyo Dental College, 1-2-2, Masago, Mihama-ku, Chiba, 261-8502 Japan.
Implant Dent. 2007 Sep;16(3):309-16. doi: 10.1097/ID.0b013e318148aebd.
Much attention has been focused on the immediate or early loading of implants with or without splinting. The purpose of this study was to evaluate the contact rate between bones and implants, with or without splinting.
Under general anesthesia, an 8-mm-deep cavity for a dental implant was drilled in the mandibular ridge of dogs where teeth had been extracted 4 months earlier. Rough-surfaced, cylindrical screw implants (International Team for Implantology [ITI] monotype implants 4 mm diameter and 8 mm long, Straumann, Basel, Switzerland) were placed with splinting on the right side and without splinting on the left side using gold abutment. Resin plates for the maxilla were adjusted to attach to the gold abutment in each mandible. At 4, 8, or 12 weeks after the implantation, specimens were stained using toluidine blue and fuchsin. The sections were observed and morphometric analysis was performed to measure the rates of bone-implant contact and new bone-implant contact.
The ratio of bone-implant contact on the lingual side was higher than on the buccal side in both the splinted and the unsplinted groups, and the rates in the splinted group were also higher than in the unsplinted group. The ratio of new bone-implant contact was not significantly different between the splinted and unsplinted groups, except for spongy bone at 4 weeks.
Splinting of immediate-loading dental implants can be adequate for osseointegration, particularly in spongy bone.
种植体即刻或早期负重（无论是否采用夹板固定）已受到广泛关注。本研究的目的是评估有无夹板固定情况下骨与种植体之间的接触率。
在全身麻醉下，于4个月前拔除牙齿的犬下颌牙槽嵴上钻一个8毫米深的种植窝。将表面粗糙的圆柱形螺纹种植体（国际口腔种植学会[ITI]单型种植体，直径4毫米，长8毫米，瑞士巴塞尔士卓曼公司）植入，右侧采用夹板固定，左侧不采用夹板固定，使用金色基台。调整上颌树脂板，使其与每个下颌骨的金色基台相连。植入后4周、8周或12周，用甲苯胺蓝和品红对标本进行染色。观察切片并进行形态计量分析，以测量骨-种植体接触率和新骨-种植体接触率。
夹板固定组和未夹板固定组舌侧的骨-种植体接触率均高于颊侧，且夹板固定组的接触率也高于未夹板固定组。夹板固定组和未夹板固定组之间的新骨-种植体接触率无显著差异，但4周时的松质骨除外。
即刻负重牙种植体采用夹板固定对骨结合是足够的，尤其是在松质骨中。
