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General Dentistry 2018The purpose of this study was to compare the depths of cure of a proximal box preparation filled in bulk with various approaches: filled with a bulk-fill or conventional...
The purpose of this study was to compare the depths of cure of a proximal box preparation filled in bulk with various approaches: filled with a bulk-fill or conventional composite; placed with a new perforated metal matrix, a traditional metal matrix, or a clear matrix; and polymerized with either occlusal-only or tri-sited light curing. After tri-sited curing, the use of the new perforated metal matrix band resulted in a depth of cure that was not significantly different from that achieved with the use of metal bands (removed during curing) or transparent matrix bands. Adequate polymerization was obtained at depths of more than 5.0 mm for the bulk-fill composite and more than 4.0 mm for the conventional composite when tri-sited light curing was used. Tri-sited light curing resulted in a significantly greater depth of cure than occlusal-only curing. The perforated metal band may be used as an alternative to the use of solid metal bands or transparent matrix bands to provide similar depths of cure for composite resins, with the possible benefits of malleability and the ability to leave the band in place during tri-sited light curing.
Topics: Composite Resins; Dental Cavity Preparation; Dental Restoration, Permanent; Humans; In Vitro Techniques; Matrix Bands
PubMed: 29714704
DOI: No ID Found -
British Dental Journal May 2002Cores for teeth with vital pulps is the seventh in the series of crowns and other extra-coronal restorations. A core is defined as 'that part of a preparation for an... (Review)
Review
Cores for teeth with vital pulps is the seventh in the series of crowns and other extra-coronal restorations. A core is defined as 'that part of a preparation for an indirect restoration consisting of restorative material'. This article questions the need for routine pin placement and addresses the following issues--removal of existing restorations, the need for a core, core materials, core retention, and problem solving.
Topics: Composite Resins; Crowns; Dental Amalgam; Dental Bonding; Dental Cements; Dental Materials; Dental Pins; Dental Prosthesis Design; Dental Prosthesis Retention; Dental Restoration Failure; Glass Ionomer Cements; Humans; Matrix Bands; Problem Solving; Resin Cements; Retreatment; Tooth Fractures; Tooth Preparation, Prosthodontic
PubMed: 12047122
DOI: 10.1038/sj.bdj.4801411 -
Quintessence International (Berlin,... Jun 1995Remarkable improvements in the early detection of proximal lesions and the development of new restorative materials warrant a reassessment of traditional cavity design.... (Review)
Review
Remarkable improvements in the early detection of proximal lesions and the development of new restorative materials warrant a reassessment of traditional cavity design. A protocol that utilizes a new cavity design in conjunction with resin-modified glass-ionomer cements to treat proximal carious lesions is described.
Topics: Bicuspid; Dental Caries; Dental Cavity Preparation; Dental Restoration, Permanent; Glass Ionomer Cements; Humans; Matrix Bands; Molar
PubMed: 8602418
DOI: No ID Found -
American Journal of Dentistry Dec 1992This study investigated the effect of different sized light curing tips (2 mm and 11 mm) with curing techniques associated with different matrix systems (Mylar with... (Clinical Trial)
Clinical Trial Comparative Study Randomized Controlled Trial
This study investigated the effect of different sized light curing tips (2 mm and 11 mm) with curing techniques associated with different matrix systems (Mylar with reflective wedge and metal with wooden wedge) on microleakage of a posterior resin composite material (P-50) placed using a bonding agent (Scotchbond 2). Eighty Class II mesial and distal slot preparations (40 with enamel gingival margins and 40 with dentin gingival margins) were randomly divided into four equal groups: 1) metal matrix, large tip; 2) Mylar matrix, light emitting wedge, large tip; 3) Mylar matrix, light emitting wedge, small tip; 4) metal matrix, small tip. Three-way ANOVA indicated no statistical differences among groups using small and large curing tips. The results showed significantly more leakage (alpha = 0.05) in the dentin gingival cavosurface margin groups than the enamel cavosurface margin groups. The results also showed significantly greater leakage in the polymerization procedures associated with the metal matrix groups (alpha = 0.05) compared to polymerization procedures associated with the Mylar matrix groups.
Topics: Analysis of Variance; Bicuspid; Bisphenol A-Glycidyl Methacrylate; Composite Resins; Dental Leakage; Dental Restoration, Permanent; Humans; Matrix Bands; Metals; Polyethylene Terephthalates; Resin Cements
PubMed: 1304181
DOI: No ID Found -
Journal of Dentistry May 2011To investigate the influence of cavity preparation (MO/DO/MOD) and type of matrix system on proximal contact tightness of direct posterior composite restorations. (Comparative Study)
Comparative Study Randomized Controlled Trial
OBJECTIVES
To investigate the influence of cavity preparation (MO/DO/MOD) and type of matrix system on proximal contact tightness of direct posterior composite restorations.
MATERIALS AND METHODS
85 patients in need of a two- or three surface Class II direct composite restoration were randomly divided into two treatment groups. Group 1 was treated with a sectional matrix system combined with a separation ring (Palodent); Group 2 was treated with a circumferential matrix system in combination with a retainer (Tofflemire). Proximal contact tightness was recorded before treatment and directly after finishing the restoration.
RESULTS
For the two-surface cavities use of the separation ring resulted in a statistically significantly tighter proximal contacts at both the mesial and distal site (MO: 2.51±0.81 N; DO: 2.82±1.14 N) compared to the use of the circumferential (MO: -1.08±1.04 N; DO: -0.22±0.87 N) (p=0.01). Regarding the three-surface (MOD) cavities no statistically significant differences were found between the mesial and distal site, nor was there an effect of the used matrix system. No statistically significant influence of cavity design (mesially/distally) was recorded for all cavities (MO, DO and MOD).
CONCLUSIONS
Use of the sectional matrix system in two-surface Class II cavities resulted in statistically significantly tighter proximal contacts than the use of the circumferential matrix system. For the three-surface no statistically significant differences in contact tightness were found between the different matrix systems. Location of the cavity (mesially or distally) did not show to have any statistically significant effect on the obtained proximal contact tightness.
Topics: Acid Etching, Dental; Adult; Composite Resins; Dental Caries; Dental Cavity Preparation; Dental Marginal Adaptation; Dental Materials; Dental Polishing; Dental Restoration, Permanent; Equipment Design; Female; Humans; Male; Matrix Bands; Polymerization; Resin Cements; Surface Properties
PubMed: 21414384
DOI: 10.1016/j.jdent.2011.03.001 -
Operative Dentistry 2010
Topics: Composite Resins; Dental Cavity Preparation; Dental Materials; Dental Restoration, Permanent; Equipment Design; Humans; Matrix Bands; Rubber Dams; Surface Properties
PubMed: 20945751
DOI: 10.2341/09-338-T -
Operative Dentistry 2010The objective of the current study was to compare in-vitro the proximal contact tightness (PCT) of Class II resin composite restorations (RCR) placed with different... (Comparative Study)
Comparative Study Randomized Controlled Trial
OBJECTIVE
The objective of the current study was to compare in-vitro the proximal contact tightness (PCT) of Class II resin composite restorations (RCR) placed with different established and new placement techniques.
METHODS
105 ivorine lower left first molars with standardized MO cavities were randomly divided into seven groups (n = 15) as follows: SRing: sectional matrix and separation ring (Garrison Dental); CRing: circumferential matrix (1101-c, KerrHawe SA) with separation ring; CWedge: circumferential matrix with a wedge only; COptra: circumferential matrix and OptraContact (Vivadent); CCerana: circumferential matrix and a Cerana insert (Nordiska Dental); CElliot: circumferential matrix and Elliot separator (PFINGST & Co) and Walser: Walser matrix O-type (Dr Walser Dental GmbH). In all the groups, the matrix band was secured using a wooden wedge except for the Walser group, following manufacturer's recommendations. A Tofflemire retainer (Kerr Corporation) was used to apply the circumferential matrix band whenever it was used. All the prepared teeth were restored with resin composite (Premise, Kerr) mounted in a manikin head to simulate the clinical environment. PCT was measured using the Tooth Pressure Meter (University of Technology, Delft). The data were analyzed using one-way ANOVA and Tukey post-hoc tests (p < 0.05).
RESULTS
Compared to the control group (SRing) (6.64 +/- 1.06N), all other systems resulted in significantly lower PCT values (p < 0.001). Within the circumferential matrix groups, CRing (4.01 +/- 0.53N) and CElliot (4.29 +/- 1.08N) showed significantly tighter contacts compared to the CWedge (0.37 +/- 0.22N), COptra (0.91 +/- 0.49N), CCerana (2.99 +/- 1.98N) and Walser (1.34 +/- 0.55N) (p < 0.05) group. Between CWedge and COptra, no significant difference was found (p = 0.57).
CONCLUSION
The use of separation rings with sectional matrices provides superior contacts when placing Class II RCRs.
Topics: Composite Resins; Dental Cavity Preparation; Dental Marginal Adaptation; Dental Materials; Dental Restoration, Permanent; Equipment Design; Humans; Manikins; Materials Testing; Matrix Bands; Surface Properties; Tooth, Artificial
PubMed: 20166409
DOI: 10.2341/09-037L -
The Journal of Pedodontics 1985
Topics: Dental Instruments; Dental Restoration, Permanent; Humans; Matrix Bands
PubMed: 3856001
DOI: No ID Found -
HDA Now 2010
Topics: Color; Composite Resins; Curing Lights, Dental; Dental Materials; Humans; Materials Testing; Matrix Bands; Polymers; Viscosity
PubMed: 20931711
DOI: No ID Found -
British Dental Journal Sep 1949
Topics: Humans; Matrix Bands; Tooth
PubMed: 18210528
DOI: No ID Found