羟基磷灰石涂层钛种植支抗的稳定性

将羟基磷灰石涂层钛种植体处期植入狗颌骨，施以１５０ｇ的正畸力，通过口内及Ｘ线归咎测量，动态研究种植支抗在３个月内的稳定性。结果显示：判断种植支抗的移动应综合采用口内及通过Ｘ线归咎测量两种方法：ＨＡ涂层钛种植支抗的骨内段无移位，而基桩在受力后第２和第３个月倾斜移动。

Stability of HA-coated titanium implants used as orthodontic anchorage]

12 two-stage HA-coated titanium implants were inserted into the mandibular alveolar bones of two dogs were loaded with orthodontic force of 150 gram for 3 months. The stability of the implants under orthodontic force were studied with intraoral and radiographic examinations. The results showed that both intraoral and radiographic analysis were reliable for assessing implant stability, and no signs of fixture dislocation were found during the force application period (P > 0.05), while the abutment was tilted after being loaded for 2 to 3 months. This suggests that HA-coated titanium implants remain stable enough under orthodontic force and are suitable as anchorage for short-term orthodontic therapy after design of the implant neck is improved.