Influence of coping material selection and porcelain firing on marginal and internal fit of computer-aided design/computer- aided manufacturing of zirconia and titanium ceramic implant-supported crowns / 华西口腔医学杂志
West China Journal of Stomatology
;
(6): 262-266, 2016.
Article
in Chinese
| WPRIM
| ID: wpr-309141
ABSTRACT
<p><b>OBJECTIVE</b>This study aimed to investigate the influence of coping material and porcelain firing on the marginal and internal fit of computer-aided design/computer-aided manufacturing (CAD/CAM) of zirconia ceramic implant- and titanium ceramic implant-supported crowns.</p><p><b>METHODS</b>Zirconia ceramic implant (group A, n = 8) and titanium metal ceramic implant-supported crowns (group B, n = 8) were produced from copings using the CAD/CAM system. The marginal and internal gaps of the copings and crowns were measured by using a light-body silicone replica technique combined with micro-computed tomography scanning to obtain a three-dimensional image. Marginal gap (MG), horizontal marginal discrepancy (HMD), and axial wall (AW) were measured. Statistical analyses were performed using SPSS 17.0.</p><p><b>RESULTS</b>Prior to porcelain firing, the measurements for MG, HMD, and AW of copings in group A were significantly larger than those in group B (P < 0.05). After porcelain firing, the measurements for MG of crowns in group A were smaller than those in group B (P < 0.05), whereas HMD and AW showed no significant difference between the two groups (P > 0.05). Porcelain firing significantly reduced MG (P < 0.05) in group A but significantly increased MG, HMD, and AW in group B (P < 0.05) HMD and AW were not influenced by porcelain firing in group A (P > 0.05).</p><p><b>CONCLUSION</b>The marginal fits of CAD/CAM zirconia ceramic implant-supported crowns were superior to those of CAD/CAM titanium ceramic-supported crowns. The fits of both the CAD/CAM zirconia ceramic implant- and titanium ceramic implant-supported crowns were obviously influenced by porcelain firing.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Titanium
/
Zirconium
/
Ceramics
/
Dental Prosthesis Design
/
Computer-Aided Design
/
Crowns
/
Dental Porcelain
/
X-Ray Microtomography
Limits:
Humans
Language:
Chinese
Journal:
West China Journal of Stomatology
Year:
2016
Type:
Article
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