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首页> 外文期刊>Pediatric dentistry >Double vs single primary teeth extraction approach as prevention of permanent maxillary canines ectopic eruption
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Double vs single primary teeth extraction approach as prevention of permanent maxillary canines ectopic eruption

机译：双主乳拔牙法与单主乳拔牙法预防上颌恒牙异位性发作

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Purpose: To compare the effects of extraction of primary maxillary canines and first molars (double extraction approach) vs primary maxillary canines extraction (single extraction approach) in cases of ectopic permanent maxillary canines (PMCs). Methods: Palatally or centrally displaced PMCs were randomly assigned as follows: single extraction (Group 1=29 patients, 52 canines); double extraction (Group 2=30 patients, 56 canines). PMCs inclination to the midline and to the long axis of the lateral incisor, mesiodistal position of the PMCs crown, and first premolars angulation to the midline were measured on panoramic radiographs at T0 and after 18 months (T1), on average. Between-group statistical comparison was carried out on T0-T1 changes for all the radiographic variables. Eruptiononeruption of the PMCs was also assessed. Results: Group 2 exhibited improvements in PMCs intrabony position among all the examined variables (P<.001), obtaining a greater parallelism between the roots of the PMCs and the adjacent lateral incisors (P<.001). An improved position of the first premolars due to a reduced angulation (P<.001) was also observed. Clinicalsuccess rates showed no statistically significant difference. Conclusions: The double extraction approach proved to be a more effective procedure vs the single extraction approach in improving permanent maxillary canines' intraosseous position.
机译：目的：比较异位永久上颌犬（PMC）情况下拔除上颌初级犬牙和第一磨牙（双重拔牙法）与上颌初级犬牙（单一拔牙法）的效果。方法：将Pala上或中心移位的PMC随机分配如下：单次提取（第1组= 29位患者，52只犬）;二次拔牙（第2组= 30名患者，56只犬）。平均在T0和18个月（T1）的全景X线照片上测量PMC相对于中切牙和侧切牙长轴的倾斜度，PMC冠的近中位以及第一前磨牙与中线的角度。对所有放射线照相变量的T0-T1变化进行组间统计比较。还评估了PMC的喷发/未喷发。结果：第2组在所有检查的变量中均表现出PMC骨内位置的改善（P <.001），在PMC的根和相邻的侧切牙之间获得了更大的平行度（P <.001）。还观察到由于减小的角度（P <.001），第一前磨牙的位置得到了改善。临床成功率无统计学差异。结论：与单次提取方法相比，双次提取方法在改善永久性上颌犬的骨内位置方面更有效。

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