%0 Journal Article
%T Standards of teeth preparations for anterior resin bonded all-ceramic crowns in private dental practice in Jordan
%A AL-Dwairi
%A Ziad Nawaf
%A AL-Hiyasat
%A Ahmad Saleh
%A Aboud
%A Haitham
%J Journal of Applied Oral Science
%D 2011
%I University of S?o Paulo
%R 10.1590/S1678-77572011005000012
%X objectives: to investigate if general dental practitioners (gdps) in private practice in jordan follow universal guidelines for preparation of anterior teeth for resin bonded all-ceramic crowns (rbcs). material and methods: a sample (n=100) of laboratory models containing 208 tooth preparations for ips empress and in ceram, featuring work from different gdps, was obtained from 8 commercial dental laboratories. aspects of preparations were quantified and compared with accepted criteria defined following a review of the literature and recommendations of the manufactures' guidelines. results: subgingival margins on the buccal aspect were noticed in 36% of the preparations, 54% demonstrated overpreparation with a tendency to overprepare the teeth on the mesiodistal plane more than buccolingual plane. twenty percent of samples presented a shoulder finish line while a chamfer margin design was noticed in 39%. twenty-nine percent and 12% of samples had either a feathered or no clear margin design respectively. incisal underpreparation was observed in 18% of dies of each type. only 17% of all preparations were found to follow the recommended anatomical labial preparations while 29% of the rbc preparations were found to have the recommended axial convergence angle. in total, 43% of preparations were found to have the recommended depth of the finish line. conclusions: it was found that relevant guidelines for rbc preparations were not being fully adhered to in private practice in jordan.
%K porcelain
%K anterior teeth
%K in-ceram
%K jordan
%K private practice.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1678-77572011000400013&lng=en&nrm=iso&tlng=en