All-ceramic premolar guiding plate retains resin-bonded fixed partial dentures / 华西口腔医学杂志
West China Journal of Stomatology
;
(6): 285-289, 2019.
Article
in Chinese
| WPRIM
| ID: wpr-772660
ABSTRACT
OBJECTIVE@#This study aims to investigate the fracture resistance and short-term restorative effects of resin-bonded fixed partial dentures (RBFPDs) made from heat-pressed lithium-disilicate-based glass-ceramic (IPS e.max press) and zirconia ceramic (WIELAND) and retained by all-ceramic guiding plates when used to restore missing mandibular second premolars.@*METHODS@#A total of 64 human mandibular first premolars and first molars were prepared as abutments, then were randomly divided into 4 groups (n=8) E0, heat-pressed ceramic RBFPDs, no cyclic loading; E1, heat-pressed ceramic RBFPDs exposed to 300 000 cycles of dynamic loading; W0, zirconia ceramic RBFPDs, no cyclic loading; and W1, zirconia ceramic RBFPDs exposed to 300 000 cycles of dynamic loading. Fracture strength was tested in a universal testing machine.@*RESULTS@#The medians of fracture strength were 1 242.85 N±260.11 N (E0), 1 650.85 N±206.77 N (W0), 1 062.60 N±179.98 N (E1), and 1 167.61 N±265.50 N (W1). Statistical analysis showed that all the groups exhibited significantly higher fracture strength compared with the maximum bite force in the premolar region (360 N; P0.05). Significant statistical differences were found between the zirconia ceramic groups (W0 and W1, P0.05) after dynamic loading.@*CONCLUSIONS@#The RBFPDs retained by all-ceramic guiding plates exhibited promising fracture properties and optimal short-term restorative effects when used to restore missing mandibular second premolars.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Zirconium
/
Bicuspid
/
Materials Testing
/
Ceramics
/
Denture Design
/
Denture, Partial, Fixed, Resin-Bonded
/
Dental Restoration Failure
/
Dental Porcelain
/
Dental Stress Analysis
/
Denture, Partial, Fixed
Limits:
Humans
Language:
Chinese
Journal:
West China Journal of Stomatology
Year:
2019
Type:
Article
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