In Vitro Evaluation of Contact Tightness and Marginal Overhang in Class II Primary Molar Restorations Restored with Different Matrix Systems
Year: 2025
Type: article
Abstract: available in straight and contoured shapes. 1 It can be applied from both the facial and lingual surfaces.The matrix holder can be a straight-headed type placed only on the buccal side or a reverseangled type that can be placed from the buccal/lingual side.Bands produced for mesial-occlusal-distal (MOD) cavities have two bulges at the gingival margin.In traditional Tofflemire systems, a wedge is used in the interproximal area to achieve separation.12 Composite resin restorations created using Tofflemire matrix tend to trap food due to narrow occlusogingival contacts and straight proximal contours.8,13 Metafix is a single-use matrix made of 0.038 mm stainless steel, which does not require a separate instrument IntroductIonRestoration of the interproximal area as close to natural is one of the primary objectives of a dentist. 1 The greatest challenges encountered in creating class II composite resin restorations include establishing tight interproximal contacts, achieving appropriate contours, and preventing material overhangs in the marginal area of the restoration.2,3 The contact point is defined as the area in relation to the adjacent tooth, and the main function of a tight contact point is to provide support for the stabilization of the dentition, preserve the interdental papillae, and thereby prevent food impaction and the formation of interproximal caries.4,5 Marginal overhang is defined as an extension of the restorative material beyond the borders of the cavity.Restoring, adapting, or polishing these areas is difficult due to limited access to the margins of proximal restorations.6 Overhanging restorations in the marginal area promote gingival inflammation and lead to decay by locally causing mechanical irritation.7 Marginal overhangs can be related to the type of restorative material and the matrix technique.2,8,9 The difficulties in creating good contact points with compomer and composite resin materials, which cannot be condensed like dental amalgam, can be overcome with modern matrix systems.10,11 In this study, five different matrices were compared to help create primary tooth restorations with tighter proximal contacts and less overhang.The Tofflemire matrix is still commonly used.The bands are made of stainless steel in thicknesses of 0.05 and 0.03 mm and are 1,
Authors: Gamze N Yanar, Cengiz H Bodur, Tolga Yılmaz
Institution: Gazi University
Language: English
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: diamond
Funder: Gazi Üniversitesi
OpenAlex ID: W4413374214