All-ceramic premolar guiding plate retains resin-bonded fixed partial dentures.
- Author:
Xin LI
1
;
Zhi-Min ZHU
2
;
Zi-Yan LI
2
;
Jin-Ru ZHOU
2
;
Wen-Chuan CHEN
2
Author Information
- Publication Type:Journal Article
- Keywords: all-ceramic; fracture load; guiding plate; resin-bonded fixed partial dentures
- MeSH: Bicuspid; Ceramics; Dental Porcelain; Dental Restoration Failure; Dental Stress Analysis; Denture Design; Denture, Partial, Fixed; Denture, Partial, Fixed, Resin-Bonded; Humans; Materials Testing; Zirconium
- From: West China Journal of Stomatology 2019;37(3):285-289
- CountryChina
- Language:Chinese
-
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; P<0.001). The W0 group had significantly higher fracture strength than the E0 group (P<0.05). Meanwhile, no significant difference in fracture strength was observed between the E1 and W1 groups (P>0.05). Significant statistical differences were found between the zirconia ceramic groups (W0 and W1, P<0.05) but not between the glassceramic groups (E0 and E1, P>0.05) 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.
