Effect of matrix system on the quality of proximal contact in posterior bulk-fill resin composite restorations- an in vitro study.

IF 3.1 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Clinical Oral Investigations Pub Date : 2025-06-10 DOI:10.1007/s00784-025-06402-5

Laryssa Silva da Cunha, Karoline Guará Brusaca Almeida Cavalcanti, Thiago Silva Peres, Andres Felipe Millan Cardenas, Gisele Rodrigues da Silva, Carlos José Soares

{"title":"Effect of matrix system on the quality of proximal contact in posterior bulk-fill resin composite restorations- an in vitro study.","authors":"Laryssa Silva da Cunha, Karoline Guará Brusaca Almeida Cavalcanti, Thiago Silva Peres, Andres Felipe Millan Cardenas, Gisele Rodrigues da Silva, Carlos José Soares","doi":"10.1007/s00784-025-06402-5","DOIUrl":null,"url":null,"abstract":"Objective: Evaluate the effect of matrix systems on the proximal contact force (N) between molars and premolars in two class-II bulk-fill resin composite restorations.Methods: The Typodont model of the first molar, with adjacent molar and premolar simulating the periodontal ligament was used to analyze proximal contact in two class-II restorations (n = 10) made with OPUS Bulk Fill resin composite. Four types of matrices were tested: two sectional (Palodent V3 and Unimatrix R) and two circumferential (SuperMat and universal metal matrix. Intact tooth was used as the control group). The specimens were radiographed and proximal contact force (N) were measured in a microtensile testing machine (Odeme). Data were analyzed using two-way ANOVA followed by the Tukey and Dunnet tests (α = 0.05).Results: The contact force on the premolar was lower than that on the molar (P < 0.001) irrespective of the matrix system. The sectional matrices produced similar proximal contact forces as the intact tooth (P = 0.109) and higher than the circumferential matrices (P < 0.001), irrespective of the tooth-type contact. The radiographic analysis showed predominantly perfect proximal contact in the sectional matrix specimens.Conclusions: The contour and proximal contact forces were influenced by the matrix systems and tooth contact location. The sectional matrices had better proximal contact force than the circumferential matrices.Clinical relevance: Compared with circumferential matrices, sectional matrices are more flexible and can be moved easily to the direction of the adjacent tooth to produce better proximal contact in class-II bulk-fill resin composite restorations.","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 7","pages":"337"},"PeriodicalIF":3.1000,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Clinical Oral Investigations","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1007/s00784-025-06402-5","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}

引用次数: 0

Abstract

Objective: Evaluate the effect of matrix systems on the proximal contact force (N) between molars and premolars in two class-II bulk-fill resin composite restorations.

Methods: The Typodont model of the first molar, with adjacent molar and premolar simulating the periodontal ligament was used to analyze proximal contact in two class-II restorations (n = 10) made with OPUS Bulk Fill resin composite. Four types of matrices were tested: two sectional (Palodent V3 and Unimatrix R) and two circumferential (SuperMat and universal metal matrix. Intact tooth was used as the control group). The specimens were radiographed and proximal contact force (N) were measured in a microtensile testing machine (Odeme). Data were analyzed using two-way ANOVA followed by the Tukey and Dunnet tests (α = 0.05).

Results: The contact force on the premolar was lower than that on the molar (P < 0.001) irrespective of the matrix system. The sectional matrices produced similar proximal contact forces as the intact tooth (P = 0.109) and higher than the circumferential matrices (P < 0.001), irrespective of the tooth-type contact. The radiographic analysis showed predominantly perfect proximal contact in the sectional matrix specimens.

Conclusions: The contour and proximal contact forces were influenced by the matrix systems and tooth contact location. The sectional matrices had better proximal contact force than the circumferential matrices.

Clinical relevance: Compared with circumferential matrices, sectional matrices are more flexible and can be moved easily to the direction of the adjacent tooth to produce better proximal contact in class-II bulk-fill resin composite restorations.

查看原文本刊更多论文

基质体系对后牙体填充树脂复合材料修复体近端接触质量影响的体外研究。

目的：评价基质体系对两种ii类体填充树脂复合修复体中磨牙与前磨牙近端接触力(N)的影响。方法：采用第一磨牙的typdon模型，相邻磨牙和前磨牙模拟牙周韧带，对2个ii类修复体（n = 10）进行近端接触分析。测试了四种类型的矩阵：两种截面（Palodent V3和Unimatrix R）和两种圆周（SuperMat和通用金属矩阵）。以完好牙为对照组)。在微拉伸试验机（Odeme）上测量近端接触力(N)。数据分析采用双因素方差分析，然后采用Tukey和Dunnet检验（α = 0.05）。结果：前磨牙的接触力低于磨牙的接触力(P)。结论：基质系统和牙体接触位置影响牙体的近端接触力。截面型基质比周向型基质具有更好的近端接触力。临床意义：在ii类大块填充树脂复合修复体中，与周向基质相比，截面基质更灵活，易于向邻牙方向移动，产生更好的近端接触。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Clinical Oral Investigations 医学-牙科与口腔外科

CiteScore

6.30

自引率

5.90%

发文量

484

审稿时长

3 months

期刊介绍： The journal Clinical Oral Investigations is a multidisciplinary, international forum for publication of research from all fields of oral medicine. The journal publishes original scientific articles and invited reviews which provide up-to-date results of basic and clinical studies in oral and maxillofacial science and medicine. The aim is to clarify the relevance of new results to modern practice, for an international readership. Coverage includes maxillofacial and oral surgery, prosthetics and restorative dentistry, operative dentistry, endodontics, periodontology, orthodontics, dental materials science, clinical trials, epidemiology, pedodontics, oral implant, preventive dentistiry, oral pathology, oral basic sciences and more.