Baldi Domenico, Menini Maria, Colombo Jacopo, Lertora Enrico, Pera Paolo
Int J Prosthodont. 2017 Sep/Oct;30(5):496-498. doi: 10.11607/ijp.5378.
This paper describes a new ultrasonic instrument (tipholder DB1 with crown prep tip inserts) designed to optimize prosthodontic margin repositioning and finishing.
The insert movement was assessed, and it was demonstrated that tipholder DB1 provides its inserts with an elliptical-like movement, making the entire insert surface able to cut. Then, 20 extracted teeth were prepared using tipholder DB1, sonic instruments, and traditional drills. Dental surface roughness produced using each of the three tools was measured using a roughness tester. Results were compared using univariate analysis of variance and Bonferroni post hoc test.
The roughness produced using tipholder DB1 with crown prep insert presented no statistically significant differences compared to the roughness produced using sonic instruments and traditional drills.
Tipholder DB1 with crown prep inserts is a promising treatment for margin repositioning and finishing.
本文介绍一种新型超声仪器（带有牙冠预备尖端插入物的刀头夹持器DB1），其设计目的是优化修复体边缘重新定位和修整。
评估了插入物的运动情况，结果表明刀头夹持器DB1为其插入物提供类似椭圆形的运动，使整个插入物表面都能进行切割。然后，使用刀头夹持器DB1、超声器械和传统钻头对20颗离体牙进行预备。使用粗糙度测试仪测量三种工具各自产生的牙面粗糙度。结果采用单因素方差分析和Bonferroni事后检验进行比较。
与使用超声器械和传统钻头产生的粗糙度相比，使用带有牙冠预备插入物的刀头夹持器DB1产生的粗糙度无统计学显著差异。
带有牙冠预备插入物的刀头夹持器DB1在边缘重新定位和修整方面是一种有前景的治疗方法。
