Wehrbein H, Diedrich P
Department of Orthodontics, Medical Faculty, University of Aachen, Germany.
Clin Oral Implants Res. 1993 Jun;4(2):76-82. doi: 10.1034/j.1600-0501.1993.040203.x.
An experiment was carried out to determine whether endosseous titanium implants (Brånemark) retain their clinical stability throughout a 26-week period of continuously applied force (2 N) and what kind of marginal peri-implant bone changes occur in the process. For this purpose 6 premolars (P3: mandible/maxilla and P4: mandible) were extracted from each of 2 foxhounds, and 12 implants (6 per dog) were positioned in the edentulous maxillary and mandibular areas after the alveolar healing period. Following a 25-week implant healing period, 8 fixtures (P3 areas) were used as anchoring elements for distalization of the 2nd premolars over a period of 26 weeks; 4 implants served as a control group (P4 areas of the mandible). There were no clinical or histological signs of implant dislocation after the load application period. In the presence of mild peri-implant gingivitis, no increase was found in the incidence of marginal bone resorption adjacent to the loaded implants compared with the non-loaded implants. In the absence of marginal resorption, subperiosteal bone apposition was detected especially around the test implants in the mandible. This suggests that endosseous titanium implants are suitable as anchoring units for longer-term orthodontic tooth movements. The applied force may moreover induce marginal bone appositions adjacent to the implants.
进行了一项实验，以确定骨内钛种植体（布伦马克种植体）在持续施加2N力的26周期间是否能保持其临床稳定性，以及在此过程中种植体周围边缘骨会发生何种变化。为此，从2只猎狐犬中各拔除6颗前磨牙（P3：下颌/上颌和P4：下颌），在牙槽愈合期后，将12颗种植体（每只狗6颗）植入无牙的上颌和下颌区域。经过25周的种植体愈合期后，8个固定装置（P3区域）在26周的时间内用作第二前磨牙远中移动的锚固元件；4颗种植体作为对照组（下颌P4区域）。加载期后未发现种植体脱位的临床或组织学迹象。在存在轻度种植体周围牙龈炎的情况下，与未加载种植体相比，加载种植体周围边缘骨吸收的发生率没有增加。在没有边缘吸收的情况下，尤其是在下颌的测试种植体周围检测到骨膜下骨附着。这表明骨内钛种植体适合作为长期正畸牙齿移动的锚固单元。此外，施加的力可能会在种植体周围诱导边缘骨附着。
