Sankhyan Vanshish, Makkar Sameer, Negi Shabnam, Gupta Simran, Jain Ayushi, Arora Garima
Department of Conservative Dentistry and Endodontics, Bhojia Dental College and Hospital, Baddi, Himachal Pradesh, India.
Department of Conservative Dentistry and Endodontics, Santosh Dental College Ghaziabad, Uttar Pradesh, India.
J Conserv Dent Endod. 2024 Sep;27(9):913-919. doi: 10.4103/JCDE.JCDE_313_23. Epub 2024 Sep 7.
Sectional matrix systems, namely, Garrison and Bioclear with contact rings, are valuable aids to establish proximal contact tightness and contours in Class II composite restorations when compared with the circumferential matrix system Tofflemire.
This study aimed to compare the proximal contact and contours of Class II restoration in premolars and molars restored with Tofflemire, Garrison, and Bioclear matrix system by FDI criteria of approximal anatomical form using floss or 25-µm metal blade and radiographic examination.
Sixty Class II patients were selected, and a preoperative bitewing radiograph was taken. Initially, caries removal was done by round diamond bur, followed by 245 carbide bur. Samples were divided randomly into three groups based on the type of matrix system used for restoration. Group 1 ( = 20): Tofflemire, Group 2 ( = 20): Garrison matrix system, and Group 3 ( = 20): Bioclear matrix system. Matrix systems were applied according to the manufacturer's instructions, and composite restoration was done. The clinical evaluation of proximal contact and contour was done by a blinded observer immediately after placement of composite restoration using FDI criteria by passing dental floss or 25-µm metal blade, whereas marginal gaps and overhangs were checked using a radiograph. Results were statistically analyzed.
The statistical analysis was done using the Statistical Package for the Social Sciences (SPSS for Windows, Version 19.0). Descriptive statistics was calculated as frequency and percentage. The comparison of characteristics of the contact points, contour, and radiographic examination was carried out using the Chi-square test. Multiple comparisons were done by comparing column proportions with Bonferroni adjustments. The level of significance for the present study was fixed at < 0.05.
There were significantly higher proportions of normal contacts in Garrison (60%) and Bioclear (70%) compared to that in the Tofflemire (20%) matrix system (Bioclear > Garrison > Tofflemire). Comparison of contours showed normal contours with Garrison (50%), Bioclear (50%), and Tofflemire (15%) matrix system (Bioclear = Garrison > Tofflemire). In radiographic examination, harmonious transitions between the restoration and the tooth were similar in Garrison (30%) and Bioclear (30%) compared to the Tofflemire (15%) matrix system (Bioclear = Garrison > Tofflemire).
Garrison and Bioclear sectional matrix systems established superior contacts and contours than the Tofflemire circumferential system.
与环形矩阵系统托弗莱米尔（Tofflemire）相比，分段矩阵系统，即带有接触环的加里森（Garrison）和生物清洁（Bioclear）系统，在二类复合树脂修复中对于建立邻面接触紧密度和外形轮廓是很有价值的辅助工具。
本研究旨在根据邻面解剖形态的FDI标准，使用牙线或25微米金属刀片以及X线检查，比较用托弗莱米尔、加里森和生物清洁矩阵系统修复的前磨牙和磨牙二类修复体的邻面接触和外形轮廓。
选取60例二类修复患者，术前拍摄咬合翼片。首先，用圆形金刚砂车针去除龋坏组织，然后用245号硬质合金车针。根据修复所用矩阵系统的类型将样本随机分为三组。第1组（n = 20）：托弗莱米尔；第2组（n = 20）：加里森矩阵系统；第3组（n = 20）：生物清洁矩阵系统。按照制造商说明应用矩阵系统并进行复合树脂修复。在复合树脂修复完成后，由一名不知情的观察者立即使用FDI标准，通过牙线或25微米金属刀片对邻面接触和外形轮廓进行临床评估，而使用X线片检查边缘间隙和悬突。对结果进行统计学分析。
使用社会科学统计软件包（SPSS for Windows，版本19.0）进行统计分析。描述性统计以频率和百分比计算。使用卡方检验对接触点、外形轮廓和X线检查的特征进行比较。通过将列比例与邦费罗尼校正进行比较来进行多重比较。本研究的显著性水平设定为P < 0.05。
与托弗莱米尔矩阵系统（20%）相比，加里森（60%）和生物清洁（70%）系统中正常接触的比例显著更高（生物清洁>加里森>托弗莱米尔）。外形轮廓比较显示，加里森（50%）、生物清洁（50%）和托弗莱米尔（15%）矩阵系统中正常外形轮廓的情况（生物清洁 = 加里森>托弗莱米尔）。在X线检查中，与托弗莱米尔（15%）矩阵系统相比，加里森（30%）和生物清洁（30%）系统中修复体与牙齿之间的和谐过渡情况相似（生物清洁 = 加里森>托弗莱米尔）。
加里森和生物清洁分段矩阵系统比托弗莱米尔环形系统能建立更好的接触和外形轮廓。
