Effect of pontic framework design on the fracture resistance of implant-supported all-ceramic fixed partial dentures
J. appl. oral sci
; 17(5): 533-538, Sept.-Oct. 2009. ilus, tab
Article
in English
| LILACS
| ID: lil-531409
Responsible library:
BR1.1
ABSTRACT
OBJECTIVE:
The purpose of this study was to compare the fracture resistance of implant-supported all-ceramic fixed partial dentures, which have three different pontic designs. MATERIAL ANDMETHODS:
Two implants were placed in a metal model simulating mandibular left second premolar and mandibular left second molar. Thirty standardized 3-unit all-ceramic fixed partial dentures with biconvex, convex or concave pontic designs were fabricated using IPS e.max system (n=10). Afterwards, specimens were centrally loaded on the pontics until failure with a universal testing machine. Results were analyzed by Kruskal-Wallis and Mann-Whitney U tests at 5 percent significance level.RESULTS:
The fracture resistance values of all-ceramic fixed partial dentures designed with biconvex, convex or concave pontics were 349.71, 438.20 and 300.78 N, respectively. There were no statistically significant differences between the fracture resistances of the groups (p>0.05), except for convex and concave groups (p<0.05 and p=0.009, respectively).CONCLUSIONS:
Convex design showed the best mechanical properties as demonstrated by the high values of fracture resistance.
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Dental Abutments
/
Dental Prosthesis Design
/
Dental Prosthesis, Implant-Supported
/
Dental Restoration Failure
/
Dental Porcelain
/
Denture, Partial, Fixed
Limits:
Humans
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2009
Document type:
Article
Affiliation country:
Turkey
Institution/Affiliation country:
University of Gaziantep/TR
/
University of Selcuk/TR