Influence of Matrix Type on Marginal Gap Formation of Deep Class II Bulk-Fill Composite Restorations

Hahn, Britta; Haubitz, Imme; Krug, Ralf; Krastl, Gabriel; Soliman, S

doi:10.3390/ijerph19094961

Cited by 6 publications

(6 citation statements)

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“…A tight‐fitting matrix facilitates the provision of direct restorations with excellent marginal adaptation. Circumferential metal matrices, the type of matrix most used in the studies included in this review, were shown to have a positive influence on the marginal quality of deep class II RBC restorations 59 . Such matrices may therefore be regarded as the matrix system of choice for DME.…”

Section: Discussionmentioning

confidence: 99%

“…Circumferential metal matrices, the type of matrix most used in the studies included in this review, were shown to have a positive influence on the marginal quality of deep class II RBC restorations. 59 Such matrices may therefore be regarded as the matrix system of choice for DME. However, it is often tricky to achieve a good marginal seal with a matrix in proximal defects extending beyond the CEJ.…”

Section: Sequence Of Restorative Procedures In In Vitro/in Silico Stu...mentioning

confidence: 99%

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Deep margin elevation—Present status and future directions

Eggmann

Ayub

Conejo

et al. 2023

J Esthet Restor Dent

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Objective: Deep margin elevation (DME) is a treatment approach to relocate the cervical margin of teeth with subgingival defects to a supragingival position with a direct restoration to facilitate rubber dam isolation, impression taking, and bonding of indirect restorations. This article provides an overview of the current scientific evidence on DME and future directions for research. Overview:The review included 38 studies on DME, most conducted in vitro. These studies indicate that DME has no detrimental effect on the fracture resistance of restored teeth. Evidence on the impact of DME on marginal quality is conflicting, but most in vitro studies observed no negative effect. Clinical studies, most comprising small patient cohorts, demonstrated favorable restorative outcomes and suggest that DME restorations made with scrupulous care are compatible with periodontal health. Bleeding on probing may occur more frequently at sites with DME, though evidence on this is not unequivocal.Conclusions: Current evidence, based largely on laboratory studies and limited clinical data, supports DME as a viable approach to restore teeth with localized subgingival defects. However, further clinical studies with long-term follow-ups are required to provide corroborative evidence.Clinical Significance: Current evidence suggests that DME is a viable approach to restore teeth with localized subgingival defects as a possible alternative to surgical crown lengthening. Proper working field isolation, meticulous care in the bonding and buildup procedure, and biofilm removal through patient-performed oral hygiene and professional maintenance care are crucial. As scant clinical trial-based evidence is available today, further research is needed to evaluate the long-term performance of DME restorations and their impact on periodontal health.

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Section: Discussionmentioning

confidence: 99%

Section: Sequence Of Restorative Procedures In In Vitro/in Silico Stu...mentioning

confidence: 99%

Deep margin elevation—Present status and future directions

Eggmann

Ayub

Conejo

et al. 2023

J Esthet Restor Dent

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“…The isolation of the working field, a matrix that tightly seals the margin of the subgingival defect, and precision during all working steps involved in the bonding and buildup procedure are essential for DME [ 1 ]. When conventional RBC is used, metal matrixes—like the ones applied in the present study—are superior to transparent matrixes, and adequate light polymerization, including light curing from three sides after matrix removal, needs to be ensured [ 25 ]. Such details of the restorative procedure of a direct RBC must be taken into consideration along with clinical and radiographic indicators of restoration integrity when one assesses the suitability of an existing RBC restoration for DME.…”

Section: Discussionmentioning

confidence: 99%

“…Data of a recent laboratory study suggest that bulk fill RBC with more efficient photo initiators achieves a better marginal quality in proximal boxes below the CEJ compared with conventional RBC [ 25 ]. Accordingly, bulk fill RBCs promise to be an equivalent or superior alternative to conventional RBCs even though the marginal quality of DME restorations made with conventional RCB was rated favorably at every time point in the present study.…”

Section: Discussionmentioning

confidence: 99%

Quality of CAD-CAM inlays placed on aged resin-based composite restorations used as deep margin elevation: a laboratory study

et al. 2023

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Objectives To assess the impact of the age of resin-based composite (RBC) restorations used for deep margin elevation (DME) on the marginal quality and fracture resistance of inlays. Materials and methods Permanent human molars with direct RBC restorations, involving the mesial, occlusal, and distal surface (MOD), were allocated to four groups (each n = 12). Half of the teeth underwent thermomechanical loading including 240,000 occlusal load cycles and 534 thermal cycles (TML, 5 °C/55 °C; 49 N, 1.7 Hz). With RBC left in one proximal box as DME, all teeth received MOD inlays, made from lithium disilicate (LDS) or a polymer-infiltrated ceramic network material (PICN). The restored teeth underwent TML including 1.2 million occlusal cyclic loadings and 2673 thermal cycles. The marginal quality was assessed at baseline and after both runs of TML. Load-to-fracture tests were performed. The statistical analysis comprised multiple linear regressions (α = 0.05). Results Simulated aging of RBC restorations had no significant effect on the marginal quality at the interface between the RBC and the tooth and the RBC and the inlay (p ≥ 0.247). Across time points, higher percentages of non-continuous margin were observed between the inlay and the tooth than between the tooth and the RBC (p ≤ 0.039). The age of the DME did not significantly affect the fracture resistance (p ≥ 0.052). Conclusions Artificial aging of RBC restorations used for DME had no detrimental effect on the marginal quality and fracture resistance of LDS and PICN inlays. Clinical relevance This laboratory study suggests that—in select cases—intact, direct RBC restorations not placed immediately before the delivery of an indirect restoration may be used for DME.

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“…There are a wide variety of matrix systems on the market that are designed for posterior direct resin composite restorations. The two most frequently used are the circumferential and sectional matrix systems [23,24] . In 1871, the circumferential matrix band was first introduced by Dr. Louis Jack.…”

Section: Introductionmentioning

confidence: 99%

Clinical and Radiographic Evaluation of Sectional versus Circumferential Matrix systems: A One-Year Randomized Clinical Trial

Abdelaziz,

Fahim,

Abdelwahed

2024

Egyptian Dental Journal

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Aim: To evaluate clinically and radiographically the performance of two sectional matrix systems (TOR VM 1.398 and Composi-Tight 3D Fusion™) versus one circumferential matrix system (Tofflemire system) for 12 months.Materials and methods: 39 class II cavities were prepared. The teeth were equally divided into three groups (n=13) according to the type of applied matrix system: Group 1: TOR VM (TOR VM dental manufacturing company, Russia), Group 2: Composi-Tight 3D Fusion™ (Garrison Dental Solutions, USA), Group 3: Tofflemire Matrix Retainer Universal (Produits Dentaires S.A., Switzerland). All teeth were restored using bulk-fill resin composite (X-tra fil, Voco, Germany). The restorations were evaluated clinically and radiographically at baseline, 6-, and 12-month. The proximal contacts were categorized following the FDI recommendations as optimum, tight, or open. The proximal overhangs were assessed using digital bitewing radiographs. The proximal overhangs were categorized as absent, positive, or negative. Data were analyzed using the chisquare test, followed by multiple z-tests with Bonferroni correction. Results:The Tofflemire matrix retainer group showed higher percentages of restorations with tight or open contacts in comparison to other groups, but the difference was not statistically significant (p > 0.05). The percentages of restorations free of overhangs in TOR VM and Composi-Tight 3D Fusion™ were found to be significantly higher than that of the Tofflemire matrix retainer group (p<0.001). Conclusions:The restorations placed with TOR VM and Composi-Tight 3D Fusion™ showed proximal contacts with optimum tightness and contour as compared to the circumferential matrix system.

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Influence of Matrix Type on Marginal Gap Formation of Deep Class II Bulk-Fill Composite Restorations

Cited by 6 publications

References 50 publications

Deep margin elevation—Present status and future directions

Deep margin elevation—Present status and future directions

Quality of CAD-CAM inlays placed on aged resin-based composite restorations used as deep margin elevation: a laboratory study

Clinical and Radiographic Evaluation of Sectional versus Circumferential Matrix systems: A One-Year Randomized Clinical Trial

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