Katholieke Universiteit Leuven, Belgium.
Angle Orthod. 2011 Nov;81(6):1010-3. doi: 10.2319/012311-47.1. Epub 2011 Jun 30.
To evaluate the success rate of Bollard miniplate anchorage for bone anchored maxillary protraction (BAMP).
Twenty-five consecutive patients (mean age, 12.0 ± 1.2 years; range, 8.7-14.8 years) with maxillary hypoplasia without congenital or acquired deformation were included in this study. A total of 100 Bollard modified miniplates were placed by the same surgeon. Ninety-nine miniplates were inserted under general anesthesia, and one was placed under local anesthesia because of initially soft bone conditions. Loading of the miniplates with 150 g elastics was initiated at 17.5 ± 6.9 days (range, 11-38 days) after surgery. Mean follow-up was provided at 20.8 ± 11.1 months (range, 6.5-46.2 months).
The overall success rate of miniplate anchorage in terms of stability was 97%. During orthodontic loading, five miniplates showed signs of mobility. After interruption of loading over 2 months, two miniplates became stable again. However, a total of three miniplates needed to be removed and were successfully replaced under local anesthesia after a mean healing period of 3 months.
Skeletal anchorage by means of Bollard modified miniplates is effective for BAMP. Success depends on proper presurgical patient counseling, minimal invasive surgery, good postsurgical instructions, and orthodontic follow-up.
评估 Bollard 微型板锚固用于上颌骨牵引（BAMP）的成功率。
本研究纳入 25 例连续上颌骨发育不全且无先天性或后天性畸形的患者（平均年龄 12.0 ± 1.2 岁；范围 8.7-14.8 岁）。由同一位外科医生共放置 100 个 Bollard 改良微型板。99 个微型板在全身麻醉下插入，1 个因初始骨软条件在局部麻醉下插入。术后 17.5 ± 6.9 天（范围 11-38 天）开始用 150 g 橡皮筋加载微型板。平均随访 20.8 ± 11.1 个月（范围 6.5-46.2 个月）。
微型板锚固的整体稳定性成功率为 97%。在正畸加载过程中，有 5 个微型板出现移动迹象。中断加载超过 2 个月后，有 2 个微型板再次稳定。然而，共有 3 个微型板需要取出，并在平均 3 个月的愈合期后成功在局部麻醉下更换。
Bollard 改良微型板的骨锚固对 BAMP 有效。成功率取决于术前患者咨询、微创外科手术、良好的术后指导和正畸随访。
