Sectional matrix system in reconstruction of proximal contact in class ii resin restoration
Keywords:Sectional matrix band, Proximal contact, Class II cavity, Resin restoration.
Background: Clinicians always faces some challenges to reconstruct proper proximal contact while restoring class-II cavity with composite resin due to its viscosity, elastic property and polymerization shrinkage. It has been claimed that use of sectional pre-contoured matrix band with separation ring will produce more reliable result for reconstruction of optimal proximal contact in class II composite resin restoration.
Purpose: To evaluate the efficacy of sectional pre-contoured matrix band with separation ring for reconstruction of optimal proximal contact in class II resin composite restoration.
Methodology: One Nissin manikin model having the facility of placing and screwing all upper and lower sets of artificial human teeth and sixty-two (62) artificial human mandibular permanent 1st molar teeth were collected. These 62 artificial human mandibular permanent 1st molars were randomly assigned in two groups (A & B) having 31 teeth in each. Standardized class II MO (mesio-occlusal) cavity were prepared on total 31 artificial 1st molar in group A. The 2nd premolar in the manikin model was replaced by metal cast duplicate and permanently fixed into the socket. All the Thirty-one (31) 1st molar teeth in group A, having Prepared class II cavity in each, were replaced one by another in the manikin distal to cast duplicated 2nd premolar and restored with composite resin by using sectional pre-contoured matrix band with separation ring and another 31 uninstrumented intact artificial 1st molars were include in group B as a reference group. After completion of restoration, newly developed proximal contact points were measured by using universal testing machine one after another. Same were also done in intact reference Group B. Measurement was done to assess the position of contact point, contact tightness and contact area of Group A and Group B on the same typodont. The results were analyzed statistically with post hoc Bonferroni test (P<0.05).
Result: Teeth restored with sectional pre-contoured matrix with separation ring (group A) provided the tighter contact and broadened area of contact where all the contact points were placed more occlusally compared to that of the intact un-instrumented reference teeth (group B).Statistically significant differences (P<0.05) were produced in all the three parameters with each other.
Conclusion: Teeth restored with sectional pre-contoured matrix band with separation ring failed to reconstruct the optimal proximal contact in class-II composite resin restoration in comparison to intact uninstrumented reference tooth.
Update Dent. Coll. j: 2021; 11(2): 16-19
How to Cite
Copyright (c) 2021 Dr. Norun Nahar Iqbal
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright: Authors retain copyright and grant Update Dental College Journal the right of first publication of the work.
Articles in Update Dental College Journal are licensed under a Creative Commons Attribution 4.0 International License CC BY-4.0.This license permits use, distribution and reproduction in any medium, provided the original work is properly cited.
- Authors are able to enter into separate, additional contractual arrangements for the distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted to post their work online (e.g., in institutional repositories or on their website) as it can lead to productive exchanges, as well as greater citation of published work.
Ownership Rights: All proprietary rights other than copyright (such as patient rights) are reserved to the authors, this include the right to reproduce original figures and tables from this item in their future works, provided full credit is given to the original publication.
Originality: The authors assures that this submission is an original work and that neither this work nor one with substantially similar content has been published elsewhere in whole or in part (except in abstract form), that it has only been submitted for this publication, and that it will not be submitted elsewhere pending written notice of acceptance or rejection by this journal (Please express explicitly if you have the plan to publish any more article based on partial data of this work).
Declaration of authorship: The undersigned certify that all authors have participated sufficiently in the conception and design of this work and the analysis of the data (when applicable), as well as the writing of the manuscript to take public responsibility for it. The undersigned believe the manuscript represents valid work and have reviewed the final version of the manuscript and approve it for publication.
Data availability: The undersigned attest that they shall produce the data upon which the manuscript is based for evaluation by the Editors of their assignees should it be requested.
Disclaimer: The undersigned assures that the manuscript contains no libelous or unlawful statements and does not infringe on the rights of others. If excerpts (text or artwork) from copyrighted works are included, written permission will be secured by the authors and proper credit will be shown in the manuscript.