Vusurumarthi Vinay, Ballullaya Srinidhi V, Pushpa Shankarappa, Veluvarti Venkata Ramya K, Loka Pramod R, Galla Pavan K
Department of Conservative Dentistry and Endodontics, Saint Joseph Dental College and Hospital, Eluru, Andhra Pradesh, India.
J Int Soc Prev Community Dent. 2020 Apr 14;10(2):213-219. doi: 10.4103/jispcd.JISPCD_133_19. eCollection 2020 Mar-Apr.
The aim of this study was to evaluate the effectiveness of three different caries excavation methods using micro-computed tomography (micro-CT).
Fifteen freshly extracted human molar teeth with occlusal dentinal caries were selected. The teeth were sectioned longitudinally into two halves and were randomly divided into three groups ( = 10) depending on the caries removal technique: Group 1: tungsten carbide (TC) bur, Group 2: cerabur (CB), and Group 3: Excavus (EX) tipEX). A preoperative micro-CT scan of all the samples was taken. The caries excavation procedures were carried out followed by postoperative micro-CT scan. The preoperative and postoperative scans of each tooth were analyzed for caries removal effectiveness (CRE), mineral density (MD), and minimal invasiveness potential (MIP) using Avizo 9.4 software (Thermo Fisher Scientific, Germany). Statistical analysis was conducted by applying three-way analysis of variance and independent sample -test using the Statistical Package for the Social Sciences software, version 20.0 (IBM Corporation, USA).
Among the three groups, the TC group had the smallest RC/IC (residual caries/initial caries) ratio, highest mean MD at the cavity floor, and highest MIP. The EX group significantly had the highest RC/IC, lowest mean MD, and lowest MIP. Both the CRE and MIP parameters of CB group were acceptable (RC/IC = 0.08, mean MD = 1.09g/cm, and MIP = 1.09).
As compared with the three excavation methods, CBs can be considered as an alternative to TC burs because of its MIP and complete removal of infected carious dentin.
本研究旨在使用微型计算机断层扫描（micro-CT）评估三种不同龋洞挖掘方法的有效性。
选取15颗新拔除的有咬合面牙本质龋的人类磨牙。将牙齿纵向切成两半，并根据龋洞去除技术随机分为三组（每组n = 10）：第1组：碳化钨（TC）车针，第2组：cerabur（CB），第3组：Excavus（EX）尖端。对所有样本进行术前微型计算机断层扫描。进行龋洞挖掘程序，随后进行术后微型计算机断层扫描。使用Avizo 9.4软件（德国赛默飞世尔科技公司）对每颗牙齿的术前和术后扫描结果进行龋洞去除效果（CRE）、矿物质密度（MD）和最小侵入性潜力（MIP）分析。使用社会科学统计软件包20.0版（美国IBM公司）进行方差分析和独立样本t检验的统计分析。
在三组中，TC组的RC/IC（残留龋/初始龋）比值最小，洞底平均MD最高，MIP最高。EX组的RC/IC显著最高，平均MD最低，MIP最低。CB组的CRE和MIP参数均可接受（RC/IC = 0.08，平均MD = 1.09g/cm³，MIP = 1.09）。
与三种挖掘方法相比，由于CB的MIP以及能完全去除感染的龋坏牙本质，可被视为TC车针的一种替代方法。
