Back to Search
Start Over
Comparison of chairside and laboratory CAD/CAM to conventional produced all-ceramic crowns regarding morphology, occlusion, and aesthetics
- Source :
- Clinical oral investigations. 20(4)
- Publication Year :
- 2014
-
Abstract
- There are many ways to produce all-ceramic crowns. Computer-aided design and computer-aided manufacturing (CAD/CAM) procedures compete against conventional fabricated restorations. As different methods of production may produce variable results, this study aims to compare chairside and laboratory-based CAD/CAM systems to conventional crowns regarding their similarity to original tooth morphology, number of occlusal contacts, occlusal adjustment time, and subjective aesthetic perception. Impressions of caries-free jaws were taken, and the resulting gypsum casts were scanned with a laboratory scanner. Preparations for all-ceramic full crowns were performed on first molars, and three different restorations were made: CEREC restorations (CER), laboratory-produced CAD/CAM crowns (LABCAD), and conventional waxed-up/pressed ceramic crowns (CONV). Time for occlusal adaptation and the number of occlusal contacts were noted. Two dentists performed aesthetic gradings of restorations. Statistical analysis included one-way ANOVA with least significant difference (LSD) post hoc test, t test, and Kruskal-Wallis test. Metrical deviations of the re-scanned crowns to the original, unprepared tooth surface were 220.55 ± 54.31 μm for CER, 265.94 ± 61.39 for LABCAD, and 252.44 ± 68.77 μm for CONV group. One-way ANOVA showed significant lower deviations for the CER group. LABCAD crowns showed significantly more occlusal contacts, whereas CONV crowns required the least time for occlusal adaptation and showed excellent aesthetic gradings. All three methods had pros and cons regarding different parameters. Further improvements of CAD/CAM software shall lead to restorations comparable to conventional restorations in all aspects, especially in aesthetics. All tested methods of production for all-ceramic crowns produced clinically acceptable results. Thus, in an individual case, the method chosen can be determined by the dentist’s preference.
- Subjects :
- Molar
0209 industrial biotechnology
Ceramics
All ceramic
Esthetics
Dentistry
CAD
02 engineering and technology
03 medical and health sciences
020901 industrial engineering & automation
0302 clinical medicine
CEREC
Occlusion
Humans
General Dentistry
Occlusal Adjustment
Mathematics
Crowns
business.industry
Tooth surface
030206 dentistry
Dental Porcelain
Dental Prosthesis Design
Aesthetics
Computer-aided manufacturing
Computer-Aided Design
business
Subjects
Details
- ISSN :
- 14363771
- Volume :
- 20
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Clinical oral investigations
- Accession number :
- edsair.doi.dedup.....0b9e1e778c68e1039f052a52a77b3050