Comparison of fracture resistance of pulpless teeth restored with fiber reinforced composite posts and three kinds of resin core material / 华西口腔医学杂志
West China Journal of Stomatology
;
(6): 404-414, 2004.
Article
in Chinese
| WPRIM
| ID: wpr-330035
ABSTRACT
<p><b>OBJECTIVE</b>To compare the fracture resistances of pulpless teeth restored with FRC (Fiber Reinforced Composite) posts and three kinds of resin core material.</p><p><b>METHODS</b>A total of 42 recently extracted upper incisors were randomly divided into 3 groups. Group A was restored with prefabricated glass-fiber posts and Artglass polymer core; group B with prefabricated glass-fiber posts and Charisma composite resin core; and group C with prefabricated glass-fiber posts and AB composite resin core. In every group, the core material was processed by hot-press and non hot-press respectively. The posts size and shape were identical in the 3 groups. All teeth were fully covered with polycarbonate resin crowns. Fracture resistance was measured by applying point force at 130 degrees to the long axis of the teeth on an universal testing machine.</p><p><b>RESULTS</b>Mean fracture threshold was 505.4 N +/- 42.0 N and 564.1 N +/- 41.7 N in group A, 411.3 N +/- 23.3 N and 315.3 N +/- 19.1 N in group B and 358.4 N +/- 36.1 N and 423.4 N +/- 47.5 N in group C. In all groups, there was no posts fracture and polycarbonate resin crowns fragmentation.</p><p><b>CONCLUSION</b>The composite restoration of FRC posts combined with resin core and resin crown can improve the fracture resistance of the pulpless roots. The strength of resin core material can be increased by hot-press methods.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Therapeutics
/
Tooth Fractures
/
Post and Core Technique
/
Composite Resins
/
Tooth, Nonvital
/
Crowns
/
Dental Restoration, Permanent
/
Dental Stress Analysis
Limits:
Humans
Language:
Chinese
Journal:
West China Journal of Stomatology
Year:
2004
Type:
Article
Similar
MEDLINE
...
LILACS
LIS