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The Journal of Adhesive Dentistry 2021The importance of the interdental anatomy of a class-2 direct composite restoration is one of the most underestimated topics in direct posterior composite restorations....
The importance of the interdental anatomy of a class-2 direct composite restoration is one of the most underestimated topics in direct posterior composite restorations. The proximal emergence profile of the restoration and the contact area should be designed to maximize arch continuity and to minimize food impaction. Other restorative criteria that must be fulfilled are marginal adaptation compatible with the dental and periodontal integrity, and geometry of the marginal ridge compatible with the mechanical integrity of the restoration under load. Shortcomings will result in masticatory discomfort, caries, periodontal problems and undesired movement of teeth. In vitro and in vivo studies showed that the use a contoured sectional metal matrix band with a separation clamp results in the tightest contact point. However, this matrix system also has shortcomings and does not give the expected result in all class-2 cavities. The variation in depth, width of the box, distance between the cervical cavity margin and the adjacent tooth requires customization of the interproximal space. In order to realize this, sectional matrix bands with several profiles of curvature, variation of wedges and separation clamps, and the use of teflon tape are required. In addition, dentists should follow a protocol allowing them to build a proximal composite surface that fulfills the required restorative criteria. Pre-wedging, space evaluation, interproximal clearance, correct selection, positioning and stabilization of the matrix band are important steps in this protocol.
Topics: Composite Resins; Dental Cavity Preparation; Dental Marginal Adaptation; Dental Restoration, Permanent; Matrix Bands
PubMed: 33512113
DOI: 10.3290/j.jad.b916819 -
Acta Stomatologica Croatica Dec 2020This study aimed to investigate the techniques of matricing used by Egyptian dentists, and evaluate the influence of these techniques on the reproduction of optimum...
OBJECTIVES
This study aimed to investigate the techniques of matricing used by Egyptian dentists, and evaluate the influence of these techniques on the reproduction of optimum proximal contacts for posterior proximal resin composite restorations.
MATERIAL AND METHODS
An online questionnaire was developed and sent to 785 dentists via e-mail and social media platforms. The survey asked the participants about the following: the highest academic degree achieved and their experience, techniques of matricing used, brands of matricing systems used, assessment of proximal contact points, their evaluation of the contact points they reproduced, and their assessment of the restorations' emergence profiles.
RESULTS
A total of 415 dentists participated in the study (response rate 52.8%). 308, (74%), dentists preferred using the sectional matrix system, while 107 dentists, (26%), preferred using the circumferential matrix system. One hundred twenty-six dentists, (31%), reported that the circumferential matrix systems reproduced optimum contacts, 105 dentists, (25%), reported tight contacts and 184 dentists, (44%), reported open contacts. However, for the sectional matrix systems, the optimum contacts were reported by 279 dentists, (67%), tight contacts by 109 dentists, (26%), and open contacts by 27 dentists, (7%). There was a statistically significant difference between the sectional matrix systems and the circumferential matrix systems regarding the tightness of the proximal contact points (P<0.0001).
CONCLUSIONS
Egyptian dentists preferred using the sectional matrix systems. The survey indicated that optimum contact points were highly associated with the sectional matrix systems, while poor (open and tight) contacts were highly associated with the circumferential matrix systems.
PubMed: 33642603
DOI: 10.15644/asc54/4/6 -
British Dental Journal Apr 2002
Topics: Dentistry, Operative; Disinfection; Disposable Equipment; Equipment Design; Humans; Matrix Bands
PubMed: 12014688
DOI: No ID Found -
General Dentistry 1987
Topics: Dental Instruments; Dental Restoration, Permanent; Equipment Design; Humans; Matrix Bands
PubMed: 3481728
DOI: No ID Found -
Indian Journal of Dental Research :... 2018Dental students commonly face the problem of overhanging proximal margins and unsatisfactory proximal contact points (PCPs) while restoring Class II cavities in... (Comparative Study)
Comparative Study Randomized Controlled Trial
Comparison of two different matrix band systems in restoring two surface cavities in posterior teeth done by senior undergraduate students at Qassim University, Saudi Arabia: A randomized controlled clinical trial.
CONTEXT
Dental students commonly face the problem of overhanging proximal margins and unsatisfactory proximal contact points (PCPs) while restoring Class II cavities in posterior teeth. Various matrix band systems are used in dental clinics to avoid such problems.
AIMS
The aim of this study is to compare the effects of two matrix band systems, circumferential matrix system and sectional matrix system on the PCPs and contours when restoring Class II cavities in posterior teeth.
SETTINGS AND DESIGN
This was a randomized controlled clinical trial done at College of Dentistry, Qassim University, Saudi Arabia.
SUBJECTS AND METHODS
Total 1200 Class II cavities in teeth were selected for this study. Treatment was done by senior undergraduate students. Cavities were randomly divided into two groups. Group 1: Total 600 cavities were restored using circumferential band system. Group 2: Total 600 cavities were restored using sectional band system. Teeth were restored either with the composite or the amalgam restoration. Contact points were evaluated. The presence or absence of proximal overhangs was assessed. Overhanging margins were categorized as positive overhangs, negative overhangs, and absent overhangs.
STATISTICAL ANALYSIS USED
To identify the relationship between matrix band systems and other factors, Chi-square tests (χ-tests) and Z-tests were used. Pearson correlation coefficient was computed and logistic regression analysis was carried out to assess variables that can affect proximal margins and contact points of final restorations.
RESULTS
All optimum contacts 389 (100%) were found in restorations done using sectional band system. A highly significant association was found between open contact points and negative overhanging margins with the use of circumferential matrix band system (P < 0.00).
CONCLUSION
Sectional matrix band system has been found superior to circumferential matrix band system.
Topics: Adolescent; Adult; Aged; Aged, 80 and over; Chi-Square Distribution; Composite Resins; Dental Amalgam; Dental Caries; Dental Cavity Preparation; Dental Restoration, Permanent; Female; Humans; Male; Matrix Bands; Middle Aged; Resins, Synthetic; Saudi Arabia; Schools, Dental; Students, Dental; Young Adult
PubMed: 30127197
DOI: 10.4103/ijdr.IJDR_26_17 -
British Dental Journal Nov 2021Sectional matrix techniques offer more predictable solutions to achieving contact areas when placing direct interproximal posterior composites than circumferential...
Sectional matrix techniques offer more predictable solutions to achieving contact areas when placing direct interproximal posterior composites than circumferential matrix techniques, resulting in reduced reported complaints of food packing from patients. Despite this, a large majority of UK dentists and therapists don't currently use them. Sectional matrix systems are technique-sensitive to use, which can be a barrier to implementation for inexperienced users. The matrices can easily distort during their placement and stabilisation and when placing the restorative material. This can result in unwanted, clinically relevant problems in the resulting restorations, some of which may not be discernible once they have occurred. This paper explores the advantages and disadvantages of sectional matrices and the processes and techniques involved in their use, before discussing the potential for distortion at each step. It offers solutions to some of the commonly seen problems which will provide more predictable outcomes for those already using these techniques and encourage non-users to add them to their armamentarium.
Topics: Composite Resins; Dental Cavity Preparation; Dental Materials; Dental Restoration, Permanent; Humans; Matrix Bands
PubMed: 34773017
DOI: 10.1038/s41415-021-3608-5 -
Journal of the American Dental... Jan 1981The inability to adapt matrix bands successfully to badly broken down teeth has been a source of frustration to clinicians. Unfortunately, this has often led to therapy...
The inability to adapt matrix bands successfully to badly broken down teeth has been a source of frustration to clinicians. Unfortunately, this has often led to therapy involving extractions of strategic posterior teeth because the dentist thinks that the time and effort entailed in restoring the tooth is not practical, or that an attempt to band a difficult tooth would prove futile. The banding technique described here was effective after proper enclosure, length, and gingival adaptation were accomplished, and the occlusal surface of the crown was removed; the technique can make a difficult procedure easier to accomplish.
Topics: Crowns; Dental Amalgam; Dental Instruments; Matrix Bands; Post and Core Technique
PubMed: 7019288
DOI: 10.14219/jada.archive.1981.0014 -
Journal of Ayub Medical College,... 2023The reconstruction of proximal defects with tight contacts has always been a challenge for dental clinicians, especially with composite material. Recent literature shows...
BACKGROUND
The reconstruction of proximal defects with tight contacts has always been a challenge for dental clinicians, especially with composite material. Recent literature shows that the most frequently used matrix systems for the restoration of proximal cavities are circumferential or sectional matrix band systems. The objective of this study was to compare the contact tightness that is achieved with these two matrix band systems when using composite material.
METHODS
A total of 30 patients, i.e., 60 cavities were selected in this quasi-experimental study. Patients with two cavities in the posterior teeth were selected. Both the cavities were restored with the circumferential system, i.e., Tofflemire and sectional matrix band system, i.e., Palodent plus on the same appointment. Hence both systems were used in every patient and then contact tightness assess was ed based on an evaluation criterion, i.e., Fédération Dentaire Internationale clinical criteria for evaluation of contact in direct and indirect restorations. To make a comparison between the two systems Chi square test was used and p<0.05.
RESULTS
The mean age of the patients in the study was 31 years (SD, 7.59 years) with a range from 18 to 45 years. Most of the contact tightness in the Palodent matrix system was score 1 (n=33, 55%) and score 2 (n=17, 28.3%) while in Tofflemire was score 4 (n=28, 46.7%) and score 5 (n=19, 31.7%). Statistical analysis showed significance (p=.037) between Palodent matrix system contact tightness and Tofflemire.
CONCLUSION
The sectional matrix band system was statistically superior to the circumferential matrix band system in achieving a tighter contact for class II composite restorations.
Topics: Humans; Adolescent; Young Adult; Adult; Middle Aged; Composite Resins; Matrix Bands; Chi-Square Distribution; Margins of Excision
PubMed: 37422816
DOI: 10.55519/JAMC-02-11541 -
The Journal of Adhesive Dentistry Jun 2022To present a new restorative technique for the restoration of teeth with deep subgingival hard tissue defects extending down to the osseous crest without additional...
PURPOSE
To present a new restorative technique for the restoration of teeth with deep subgingival hard tissue defects extending down to the osseous crest without additional surgical or orthodontic interventions by combining mineral trioxide aggregate (MTA) and composite material.
MATERIALS AND METHODS
The MTA matrix technique starts by deeply inserting a metal matrix as far down to the bone level as possible. The matrix should then be fixated with a matrix holder in its end position. If the matrix band does not seal tightly in the deepest area of the cavity, small portions of MTA are carefully applied to the lower end of the inner side of the matrix band. The MTA acts as a barrier for fluid control. Additional haemostasis is not necessary. Subsequently, the tooth is restored with an etch-and-rinse adhesive and composite resin. The clinical effects were observed in a case series of three patients over a period of 3 to 4.5 years.
RESULTS
Excellent outcomes were observed clinically and radiologically. Teeth restored with the MTA matrix technique showed no failures due to the materials used or due to secondary caries or periodontal inflammation after an observation period of 3 to 4.5 years. Probing depths ranged from 2 to 4 mm without bleeding on probing, including the subgingivally restored areas.
CONCLUSION
Although only a few casuistic observations are available to date, by using the MTA matrix technique, successful restoration of teeth with subgingival defects down to the alveolar bone crest seems possible without the need of additional surgical or orthodontic measures. Further clinical studies are necessary to confirm the feasibility of this technique.
Topics: Humans; Aluminum Compounds; Calcium Compounds; Drug Combinations; Oxides; Silicates
PubMed: 35722937
DOI: 10.3290/j.jad.b3146843 -
Compendium of Continuing Education in... Feb 2024Besides meticulous application of proper bonding protocols and clinical technique, the clinical success of direct resin-based restorations is dependent on the selection...
Besides meticulous application of proper bonding protocols and clinical technique, the clinical success of direct resin-based restorations is dependent on the selection of the appropriate restorative material, curing light, and, whenever certain contours of the tooth need to be rebuilt, matrix band system. All of these aspects have seen significant developments and improvements over the years, all geared toward increased clinical success and longevity. Highlighting some of these key developments, this article provides an update on resin-based composites, curing lights, and matrix bands.
Topics: Humans; Dental Care; Dental Materials
PubMed: 38289628
DOI: No ID Found