Evidence map›Paper›PMID 40490628›Full record

ArticleClinical oral investigations2025

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

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

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Article in Clinical oral investigations, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Laryssa Silva da CunhaDepartment of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.ORCID http://orcid.org/0000-0001-7697-2373
Karoline Guará Brusaca Almeida CavalcantiDepartment of Operative Dentistry, School of Dentistry, CEUMA University, São Luiz, Maranhão, Brazil.ORCID http://orcid.org/0009-0006-3384-026X
Thiago Silva PeresDepartment of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.ORCID http://orcid.org/0000-0002-8988-2614
Andres Felipe Millan CardenasDepartment of Operative Dentistry, School of Dentistry, CEUMA University, São Luiz, Maranhão, Brazil.ORCID http://orcid.org/0000-0002-7434-3327
Gisele Rodrigues da SilvaDepartment of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil.ORCID http://orcid.org/0000-0002-9358-1339
Carlos José SoaresDepartment of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil. carlosjsoares@ufu.br.ORCID http://orcid.org/0000-0002-8830-605X

Funding

INCT Saúde Oral e Odontologia 406840/2022-9Rede Mineira de Saúde Oral e Odontologia RED-00204-23
6 · The paper itself

Abstract

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

methodsThe 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).

resultsThe 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.

conclusionsThe 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.

Indexed as

Composite ResinsDental MaterialsDental Restoration, PermanentMatrix BandsBicuspidDental Stress AnalysisHumansIn Vitro TechniquesMaterials TestingMolarSurface PropertiesTensile StrengthComposite ResinsDental MaterialsBulk-fill resin compositeMatrix systemPosterior restorationsProximal contact force

Identifiers

PMID40490628

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.