Szarmach I J, Szarmach J, Waszkiel D, Paniczko A
Department of Orthodontics, Medical University of Białystok, Poland.
Adv Med Sci. 2006;51 Suppl 1:204-9.
The aim of the study was to assess the effect of orthodontic movement of the impacted canines after surgical exposure and alignment on the periodontal status of the transpositioned and adjacent teeth as well as to compare certain parameters with those of spontaneously erupted teeth.
Twenty-four patients (mean age 18.4 +/- 3.66) with unilaterally impacted 24 canines were enrolled in the study. The following parameters were assessed: pocket depth (PD), clinical attachment level (CAL), platelet index (PI) of Silness and Löe, and modified sulcus bleeding index (SBI). Optic density of the alveolar bone along the root surface of the aligned canine was analysed based on digital radiological images made with the right angle technique. Control group consisted of spontaneously erupted teeth.
In comparison to the control group, in the orthodonticaly treated group PD was found to increase on the mesial buccal and palatal surfaces of the first premolar (p < 0.003, p < 0.04), on the treated side; on the distal buccal (p < 0.01), mesial buccal (p < 0.0005), mesial palatal (p < 0.02) and distal palatal surfaces of the canine (p < 0.02); and on the distal buccal (p < 0.04) and distal palatal surfaces of the lateral incisor (p < 0.048). CAL was statistically significant on the mesio-buccal and mesio-palatal surfaces of the aligned canine (p < 0.02). PI was statistically insignificant, while SBI values at the aligned tooth were statistically significant (p < 0.0004). Positive correlation was found between treatment duration and distance to the occlusal plane (d) expressed by the correlation coefficient r = 0.49 (p < 0.02). No relationship was observed between bone density within the canine alignment zone and the control, and there was no link between the method of treatment and periodontal status, either.
The alignment of the impacted permanent maxillary canines poses a risk of periodontal deterioration. Patients subjected to surgical-orthodontic treatment require periodic periodontal follow-ups.
本研究旨在评估外科暴露并排齐埋伏尖牙的正畸移动对易位牙及相邻牙牙周状况的影响，并将某些参数与自然萌出牙的参数进行比较。
本研究纳入了24例单侧埋伏24颗尖牙的患者（平均年龄18.4±3.66岁）。评估以下参数：牙周袋深度（PD）、临床附着水平（CAL）、Silness和Löe的菌斑指数（PI）以及改良龈沟出血指数（SBI）。基于直角技术拍摄的数字化放射影像分析排齐尖牙根面沿牙槽骨的骨密度。对照组为自然萌出牙。
与对照组相比，正畸治疗组中，在治疗侧，第一前磨牙近中颊侧和腭侧表面的PD增加（p<0.003，p<0.04）；尖牙远中颊侧（p<0.01）、近中颊侧（p<0.0005）、近中腭侧（p<0.02）和远中腭侧表面（p<0.02）；以及侧切牙远中颊侧（p<0.04）和远中腭侧表面（p<0.048）。排齐尖牙的近中颊侧和近中腭侧表面的CAL具有统计学意义（p<0.02）。PI无统计学意义，而排齐牙处的SBI值具有统计学意义（p<0.0004）。治疗持续时间与到咬合平面的距离（d）之间存在正相关，相关系数r=0.49（p<0.02）。未观察到尖牙排齐区内的骨密度与对照组之间存在关联，治疗方法与牙周状况之间也无关联。
埋伏上颌恒尖牙的排齐存在牙周恶化的风险。接受外科正畸治疗的患者需要定期进行牙周随访。
