Department of Oral and Maxillofacial Surgery, Otolaryngology, NU Hospital Organization, Trollhättan, Sweden.
Dent Traumatol. 2012 Apr;28(2):127-31. doi: 10.1111/j.1600-9657.2011.01051.x. Epub 2011 Aug 24.
The aim of this study was to retrospectively evaluate iatrogenic dental root damage, caused by two different techniques that utilized bone anchor screws, for intermaxillary fixation (IMF) in orofacial trauma.
The techniques used included either predrilled or drill-free bone anchor screws. A total of 123 patients who required IMF were evaluated (97 men and 26 women). Sixty-four patients were treated in the predrilled group, and 59 patients were treated in the drill-free group. The data were collected over an 8-year period and were analyzed using crosstabs and Fisher's exact test.
Injuries to dental roots were found only in the predrilled group. Twenty-nine patients (45.3%) were injured at the time of surgery. One year after surgery, 10 patients (15.6%) had permanently injured dental roots. There was a significant difference in injury rates between the predrilled and drill-free groups 1 year after surgery (P < 0.001).
There is an increased potential risk of iatrogenic injury and permanent damage to the dental roots when a technique that involves predrilled holes for bone anchor screws is used.
本研究旨在回顾性评估两种不同技术在颌面部创伤中使用骨锚钉进行颌间固定（IMF）时引起的医源性牙根损伤。
使用的技术包括预钻孔或无钻孔骨锚钉。评估了 123 名需要 IMF 的患者（97 名男性和 26 名女性）。64 例患者在预钻孔组治疗，59 例患者在无钻孔组治疗。数据收集时间为 8 年，使用交叉表和 Fisher 精确检验进行分析。
仅在预钻孔组发现牙根损伤。29 例患者（45.3%）在手术时受伤。术后 1 年，10 例患者（15.6%）的牙根永久性受损。术后 1 年，预钻孔组和无钻孔组的损伤发生率有显著差异（P<0.001）。
使用涉及骨锚钉预钻孔的技术时，医源性牙根损伤和永久性损伤的风险增加。
