Astocaza Reátegui Teresa Flora, Ayarza Flórez Lourdes Rocío, García Rupaya Carmen Rosa
División de Carielogía y Endodoncia, Carrera de Estomatología, Universidad Científica del Sur. Lima, Perú.
Rev Cient Odontol (Lima). 2021 Jun 21;9(2). doi: 10.21142/2523-2754-0902-2021-055. eCollection 2021 Apr-Jun.
The purpose of the study was to compare the precision of the Propex Pixi and Raypex 6 electronic apical locators in determining the working length of teeth with simulated perforations at different levels of the root canal.
36 uniradicular lower premolars were used with a canal randomly divided into three groups of 12 teeth each. In the first group two simulated perforations were made at the middle and apical level. In the second group a simulated cervical perforation was made, and in the third group a simulated perforation was performed at the apical level. Two electronic apical locators Propex Pixi and Raypex 6 were used, and the real length of the canal was measured with a digital Vernier caliper. Descriptive and inferential statistics were applied with the Friedman test at a confidence level of 95%.
When comparing the precision of the lengths obtained by the Propex Pixi and Raypex 6 apical electronic locators, statistically significant differences were found in the real length of the canal (p= 0.006) between simulated perforation of lower premolars at the cervical (p<0.001) and the apical level (p=0.008).
The Propex Pixi apical electronic locator (Dentsply Maillefer - Germany) presented greater precision in the determination of the real canal length in teeth with simulated perforations at different levels of the root canal.
本研究旨在比较Propex Pixi和Raypex 6电子根尖定位仪在确定不同根管水平有模拟穿孔牙齿工作长度时的精度。
使用36颗单根下颌前磨牙，根管随机分为三组，每组12颗牙。第一组在根管中部和根尖水平制作两个模拟穿孔。第二组制作一个模拟颈部穿孔，第三组在根尖水平制作一个模拟穿孔。使用两种电子根尖定位仪Propex Pixi和Raypex 6，并使用数字游标卡尺测量根管的实际长度。采用Friedman检验进行描述性和推断性统计，置信水平为95%。
比较Propex Pixi和Raypex 6根尖电子定位仪获得的长度精度时，在下颌前磨牙颈部模拟穿孔（p<0.001）和根尖水平模拟穿孔（p=0.008）之间，根管实际长度存在统计学显著差异（p=0.006）。
Propex Pixi根尖电子定位仪（德国登士柏迈尔费）在确定不同根管水平有模拟穿孔牙齿的实际根管长度时表现出更高的精度。
