ORIGINAL RESEARCH
Year : 2012 | Volume
: 23 | Issue : 2 | Page : 241--246
Assessment of convergence angle of full-coverage porcelain fused to metal crowns in clinical practice
Robia Ghafoor1, Azfar A Siddiqui2, Munawar Rahman3
1 Department of Surgery, Dental Section, The Aga Khan University Hospital, Karachi, Pakistan
2 Department of Prosthodontics, The Aga Khan University Hospital, Karachi, Pakistan
3 Restorative Dentistry, The Aga Khan University Hospital, Karachi, Pakistan
Correspondence Address:
Robia Ghafoor
Department of Surgery, Dental Section, The Aga Khan University Hospital, Karachi
Pakistan
Background: Full-coverage porcelain fused to metal crowns is commonly recommended for restoration of extensively damaged teeth. Ability of the dentist to adequately prepare teeth is fundamental to success and longevity of these restorations.
Aims: This study was designed to compare recommended convergence angle and taper values of tooth preparation with clinically practiced values and to assess the factors such as tooth position, operator experience, vitality, and restorative status on convergence angle of prepared teeth.
Setting and Design: It was a descriptive, cross-sectional study design and held at The Aga Khan University Hospital, Dental Section, for a period of 1 year.
Materials and Methods: A minimum of 197 crown preparation models of molar and premolar teeth prepared by residents and specialists were collected in order to achieve the objectives of the study on the basis of convenient sampling technique.
Statistical Analysis: One sample t-test used to compare the mean practiced convergence angle values with its recommended values. Independent sample t-test and one-way ANOVA was used to see difference in the convergence angle values of the teeth prepared by different operators, tooth type, vitality status, and restorative status of teeth.
Results: Mean reported convergence angle and axial wall taper values were 23.7°±8.9° and 11.3°±7.8°, respectively, which is significantly greater (P<0.001) than the recommended values. Convergence angle values were greater for molars as compared to premolars.
Conclusion: There was a considerable disparity between the convergent angles values recorded in this study and the recommended guidelines and are affected by tooth type, vitality, and restorative status of tooth.
How to cite this article:
Ghafoor R, Siddiqui AA, Rahman M. Assessment of convergence angle of full-coverage porcelain fused to metal crowns in clinical practice.Indian J Dent Res 2012;23:241-246
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How to cite this URL:
Ghafoor R, Siddiqui AA, Rahman M. Assessment of convergence angle of full-coverage porcelain fused to metal crowns in clinical practice. Indian J Dent Res [serial online] 2012 [cited 2023 Mar 31 ];23:241-246
Available from: https://www.ijdr.in/article.asp?issn=0970-9290;year=2012;volume=23;issue=2;spage=241;epage=246;aulast=Ghafoor;type=0 |
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