Dimensional stability of distances between teeth in complete dentures comparing microwave polymerization and conventional cycles
Braz. j. oral sci
;
9(3): 384-387, July-Sept. 2010. ilus, tab
Article
in English
| LILACS, BBO
| ID: lil-578066
ABSTRACT
Aim:
This study investigated the tooth movement of complete dentures processed by micro wave activation and conventional processing method in water bath.Methods:
Twenty maxillary complete dentures were fabricated and randomly assigned to 4 groups (n=5) Group I Classico convention alheat-curing acrylic resin processed by microwave polymerization; Group II Classico resinprocessed in water bath at 74°C for 9 h (control-group); Group III QC-20 fast heat-curing acrylic resin processed in boiling water for 20 min; Group IV Onda-Cryl microwave acrylic resin processed at the same conditions of Group 1. Metallic referential pins were placed on the incisal border of the central incisors, buccal cusp of the first premolars, and the mesiobuccal cusp of the second molars.Transversal and anteroposterior distances were measured before and after the complete dentures processing with a linear optical microscope (Olympus Optical Co., Tokyo, Japan) accurate to0.0005 mm. Data were subjected to A NOVA and Tukeys test at 5% significance levels.Results:
Inside each group, dentures showed some tooth movement but without statistical difference before and after the polymerization.Conclusions:
Dentures processed by microwave energy presented similar performance to those subjected to conventional cycles in water bath for most of distances evaluated.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Tooth Movement Techniques
/
Acrylic Resins
/
Dental Materials
/
Denture, Complete
/
Microwaves
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2010
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
University of Campinas/BR
/
University of Fortaleza/BR
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