A comparative evaluation of the effectiveness of added auxiliary features, occlusal surface modifications, and reduction of total occlusal convergence on the resistance of full veneer metal crowns on a molar tooth with inadequate resistance form: An in vitro study

Introduction: Single crowns or fixed partial dentures retainers usually get dislodged due to inadequate resistance form. Hence, it is prudent to evaluate features of a tooth preparation, which can prevent these failures. Aim: To evaluate the effect of auxiliary features, occlusal surface modificatio...

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Autores principales: Nitu Agrawal, Rahul Kishore Chaudhari, Anjali Gaurishankar Gheware, Azeem Ul Yaqin Syed, Tabish Rashidi, Hadeer Bhutta
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Publicado: Wolters Kluwer Medknow Publications 2021
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spelling oai:doaj.org-article:5ddf80d58d98433d812d912e11cd3db12021-11-19T12:15:52ZA comparative evaluation of the effectiveness of added auxiliary features, occlusal surface modifications, and reduction of total occlusal convergence on the resistance of full veneer metal crowns on a molar tooth with inadequate resistance form: An in vitro study0975-740610.4103/jpbs.jpbs_343_21https://doaj.org/article/5ddf80d58d98433d812d912e11cd3db12021-01-01T00:00:00Zhttp://www.jpbsonline.org/article.asp?issn=0975-7406;year=2021;volume=13;issue=6;spage=1015;epage=1018;aulast=Agrawalhttps://doaj.org/toc/0975-7406Introduction: Single crowns or fixed partial dentures retainers usually get dislodged due to inadequate resistance form. Hence, it is prudent to evaluate features of a tooth preparation, which can prevent these failures. Aim: To evaluate the effect of auxiliary features, occlusal surface modifications, and total occlusal convergence (TOC) on the resistance of a full veneer crown. Materials and Methods: An ivorine mandibular molar tooth was prepared with features of inadequate resistance form, i.e., 2.5 mm axial wall height and TOC of 20°. Seven auxiliary preparation features were subsequently added one by one to it. They were mesiodistal grooves, buccolingual and mesiodistal grooves, buccolingual grooves, mesiodistal boxes, occlusal inclined planes, 8° reduced TOC in the cervical aspect, and mesiodistal grooves added to 8° reduced TOC in the cervical aspect. Ten dies with their respective crowns were prepared for each group. Resistance testing of all the samples was performed on the INSTRON testing machine. Results: Modification of the overtapered die preparation by reducing the TOC to 8° in the cervical 1.5 mm of the axial wall and then subsequently adding mesiodistal grooves to the reduced TOC cervically offered the greatest resistance to dislodgment statistically. Conclusion: For an overtapered preparation, reducing the TOC to 8° in the cervical aspect and subsequently adding proximal grooves can provide maximum resistance form.Nitu AgrawalRahul Kishore ChaudhariAnjali Gaurishankar GhewareAzeem Ul Yaqin SyedTabish RashidiHadeer BhuttaWolters Kluwer Medknow Publicationsarticleauxiliary featuresmolar toothresistance formtaperPharmacy and materia medicaRS1-441Analytical chemistryQD71-142ENJournal of Pharmacy and Bioallied Sciences, Vol 13, Iss 6, Pp 1015-1018 (2021)
institution DOAJ
collection DOAJ
language EN
topic auxiliary features
molar tooth
resistance form
taper
Pharmacy and materia medica
RS1-441
Analytical chemistry
QD71-142
spellingShingle auxiliary features
molar tooth
resistance form
taper
Pharmacy and materia medica
RS1-441
Analytical chemistry
QD71-142
Nitu Agrawal
Rahul Kishore Chaudhari
Anjali Gaurishankar Gheware
Azeem Ul Yaqin Syed
Tabish Rashidi
Hadeer Bhutta
A comparative evaluation of the effectiveness of added auxiliary features, occlusal surface modifications, and reduction of total occlusal convergence on the resistance of full veneer metal crowns on a molar tooth with inadequate resistance form: An in vitro study
description Introduction: Single crowns or fixed partial dentures retainers usually get dislodged due to inadequate resistance form. Hence, it is prudent to evaluate features of a tooth preparation, which can prevent these failures. Aim: To evaluate the effect of auxiliary features, occlusal surface modifications, and total occlusal convergence (TOC) on the resistance of a full veneer crown. Materials and Methods: An ivorine mandibular molar tooth was prepared with features of inadequate resistance form, i.e., 2.5 mm axial wall height and TOC of 20°. Seven auxiliary preparation features were subsequently added one by one to it. They were mesiodistal grooves, buccolingual and mesiodistal grooves, buccolingual grooves, mesiodistal boxes, occlusal inclined planes, 8° reduced TOC in the cervical aspect, and mesiodistal grooves added to 8° reduced TOC in the cervical aspect. Ten dies with their respective crowns were prepared for each group. Resistance testing of all the samples was performed on the INSTRON testing machine. Results: Modification of the overtapered die preparation by reducing the TOC to 8° in the cervical 1.5 mm of the axial wall and then subsequently adding mesiodistal grooves to the reduced TOC cervically offered the greatest resistance to dislodgment statistically. Conclusion: For an overtapered preparation, reducing the TOC to 8° in the cervical aspect and subsequently adding proximal grooves can provide maximum resistance form.
format article
author Nitu Agrawal
Rahul Kishore Chaudhari
Anjali Gaurishankar Gheware
Azeem Ul Yaqin Syed
Tabish Rashidi
Hadeer Bhutta
author_facet Nitu Agrawal
Rahul Kishore Chaudhari
Anjali Gaurishankar Gheware
Azeem Ul Yaqin Syed
Tabish Rashidi
Hadeer Bhutta
author_sort Nitu Agrawal
title A comparative evaluation of the effectiveness of added auxiliary features, occlusal surface modifications, and reduction of total occlusal convergence on the resistance of full veneer metal crowns on a molar tooth with inadequate resistance form: An in vitro study
title_short A comparative evaluation of the effectiveness of added auxiliary features, occlusal surface modifications, and reduction of total occlusal convergence on the resistance of full veneer metal crowns on a molar tooth with inadequate resistance form: An in vitro study
title_full A comparative evaluation of the effectiveness of added auxiliary features, occlusal surface modifications, and reduction of total occlusal convergence on the resistance of full veneer metal crowns on a molar tooth with inadequate resistance form: An in vitro study
title_fullStr A comparative evaluation of the effectiveness of added auxiliary features, occlusal surface modifications, and reduction of total occlusal convergence on the resistance of full veneer metal crowns on a molar tooth with inadequate resistance form: An in vitro study
title_full_unstemmed A comparative evaluation of the effectiveness of added auxiliary features, occlusal surface modifications, and reduction of total occlusal convergence on the resistance of full veneer metal crowns on a molar tooth with inadequate resistance form: An in vitro study
title_sort comparative evaluation of the effectiveness of added auxiliary features, occlusal surface modifications, and reduction of total occlusal convergence on the resistance of full veneer metal crowns on a molar tooth with inadequate resistance form: an in vitro study
publisher Wolters Kluwer Medknow Publications
publishDate 2021
url https://doaj.org/article/5ddf80d58d98433d812d912e11cd3db1
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