Standards of teeth preparations for anterior resin bonded all-ceramic crowns in private dental practice in Jordan
J. appl. oral sci
;
19(4): 370-377, July-Aug. 2011. tab
Article
in English
| LILACS
| ID: lil-599761
ABSTRACT
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 ANDMETHODS:
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 percent of the preparations, 54 percent 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 percent. Twenty-nine percent and 12 percent of samples had either a feathered or no clear margin design respectively. Incisal underpreparation was observed in 18 percent of dies of each type. Only 17 percent of all preparations were found to follow the recommended anatomical labial preparations while 29 percent of the RBC preparations were found to have the recommended axial convergence angle. In total, 43 percent 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.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Ceramics
/
Dental Bonding
/
Tooth Preparation, Prosthodontic
/
Practice Patterns, Dentists'
/
Crowns
Type of study:
Practice guideline
/
Prognostic study
Limits:
Humans
Country/Region as subject:
Asia
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2011
Type:
Article
Affiliation country:
Jordan
Institution/Affiliation country:
Jordan University of Science and Technology/JO
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