Convergence angles of all-ceramic full crown preparations performed in Dubai private practice
NAGIOS: RODERIC FUNCIONANDO

Convergence angles of all-ceramic full crown preparations performed in Dubai private practice

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Convergence angles of all-ceramic full crown preparations performed in Dubai private practice

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dc.contributor.author Abdulla, Fahad es
dc.contributor.author Khamis, Hassan es
dc.contributor.author Milosevic, Alexander es
dc.contributor.author Abuzayda, Moosa es
dc.date.accessioned 2019-03-11T08:28:57Z
dc.date.available 2019-03-11T08:28:57Z
dc.date.issued 2018 es
dc.identifier.uri http://hdl.handle.net/10550/69468
dc.description.abstract This study aimed to determine the degree of taper and total occlusal convergence angles (TOC) for all-ceramic bonded crown preparations carried out by private practitioners in Dubai, UAE. A convenience sample of all-ceramic crown preparations carried out by private dental practitioners were scanned (Carestream CS 3500) from casts and the digital images assessed. The degree of taper was measured on the axial walls of each crown preparation and the bucco-lingual and mesio-distal convergence angles subsequently calculated. A total of 154 dentists prepared a total of 206 crown preparations (72 anterior, 134 posterior). The mean convergence angles mesio-distally for all preparations was 24.6° (sd 11.8º), and for the bucco-lingual it was 32.6° (sd 15.3°). The mean TOC was 28.6°. In anterior preparations, the mean bucco-lingual convergence angle was 38.8° (sd 12.2°) compared to 29.3° (sd 15.5°) for posterior preparations (p<0.001). Mean mesio-distal convergence anteriorly was 20.6° (sd 10.18°) compared to 26.7° (sd 12.16°) posteriorly (p<0.001). Distal and buccal taper were significantly greater on posterior teeth (<0.001) compared to anteriors whereas lingual taper was greater on anterior teeth (p<0.001). Mesial taper was not different. Premolars had significantly lower convergence values compared to other teeth. Bucco-lingual and mesio-distal convergence angles significantly exceeded the clinically acceptable convergence angle of between 10° and 22°. Greater axial taper is recommended for resin bonded all-ceramic crowns but reliance on adhesion in such preparations rather than parallelism may reduce retention and have increased biologic cost to pulp health. es
dc.source Abdulla, Fahad ; Khamis, Hassan ; Milosevic, Alexander ; Abuzayda, Moosa. Convergence angles of all-ceramic full crown preparations performed in Dubai private practice. En: Journal of Clinical and Experimental Dentistry, 10 12 2018: 1192-1197 es
dc.title Convergence angles of all-ceramic full crown preparations performed in Dubai private practice es
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.identifier.doi 10.4317/jced.55269 es

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