Influence of application site of provisional cement on the marginal adaptation of provisional crowns
J. appl. oral sci
;
16(3): 214-218, May-June 2008. ilus, tab
Article
in English
| LILACS, BBO
| ID: lil-483157
ABSTRACT
Introduction:
Marginal discrepancies may lead to cement washout and marginal leakage, damaging periodontal and pulp tissues or causing premature loss of the restoration.Purpose:
This study evaluated the influence of application site of provisional cement on the marginal adaptation of provisional crowns. Material andMethods:
Four different application sites of provisional cement (Temp Bond NE, Kerr Corporation) were used for cementation of provisional crowns on phantom teeth prepared for full crown restorations, performing 4 experimental groups (n=10) cement applied to all internal surfaces of the crown (CAO); cement applied to all internal surfaces of the crown, except for the occlusal surface (CA); cement applied to the cervical crown margin (CM); and cement applied to the cervical tooth margin (TM). A comparison microscope (Mitutoyo America Corporation) was used to measure the distances between the internal tangents of two circular marks, one made on the provisional crown and one made apical to the tooth preparation margin, in areas corresponding to buccal, lingual, mesial and distal surfaces. Marginal adaptation was determined before and after cementation, with 0.0001-mm accuracy. Data were analyzed statistically by ANOVA and Tukeys test at 5% significance level.Results:
Mean values of marginal opening obtained for each group were CAO 145 µm; CA 67 µm; CM 46 µm; TM 34 µm. CA, CM and TM presented significantly lower marginal openings than CAO (p<0.05).Conclusion:
complete filling of the crown with provisional cement, including the occlusal surface, provided grater marginal discrepancies when compared to the other methods evaluated.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Dental Marginal Adaptation
/
Crowns
/
Dental Cements
/
Dental Restoration, Temporary
Limits:
Humans
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2008
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Federal University of Rio de Janeiro/BR
/
State University of Rio de Janeiro/BR
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