Marginal fit of all-ceramic crowns fabricated using two extraoral CAD/CAM systems in comparison with the conventional technique
Fawaz Alqahtani1,2 1Department of Prosthodontics, 2Higher Education and Scientific Research, School of Dentistry, Prince Sattam Bin Abdul-Aziz University, Al-kharj, Saudi Arabia Objective: The purpose of this study was to determine the effect of two extraoral computer-aided design (CAD) and computer...
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| Format: | Article |
| Language: | English |
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Dove Medical Press
2017-03-01
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| Series: | Clinical, Cosmetic and Investigational Dentistry |
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| Online Access: | https://www.dovepress.com/marginal-fit-of-all-ceramic-crowns-fabricated-using-two-extraoral-cadc-peer-reviewed-article-CCIDE |
| _version_ | 1811241514999742464 |
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| author | Alqahtani F |
| author_facet | Alqahtani F |
| author_sort | Alqahtani F |
| collection | DOAJ |
| description | Fawaz Alqahtani1,2 1Department of Prosthodontics, 2Higher Education and Scientific Research, School of Dentistry, Prince Sattam Bin Abdul-Aziz University, Al-kharj, Saudi Arabia Objective: The purpose of this study was to determine the effect of two extraoral computer-aided design (CAD) and computer-aided manufacturing (CAM) systems, in comparison with conventional techniques, on the marginal fit of monolithic CAD/CAM lithium disilicate ceramic crowns. Study design: This is an in vitro interventional study. Place and duration of study: The study was carried out at the Department of Prosthodontics, School of Dentistry, Prince Sattam Bin Abdul-Aziz University, Saudi Arabia, from December 2015 to April 2016. Methodology: A marginal gap of 60 lithium disilicate crowns was evaluated by scanning electron microscopy. In total, 20 pressable lithium disilicate (IPS e.max Press [Ivoclar ­Vivadent]) ceramic crowns were fabricated using the conventional lost-wax technique as a control group. The experimental all-ceramic crowns were produced based on a scan stone model and milled using two extraoral CAD/CAM systems: the Cerec group was fabricated using the Cerec CAD/CAM system, and the Trios group was fabricated using Trios CAD and milled using Wieland Zenotec CAM. One-way analysis of variance (ANOVA) and the Scheffe post hoc test were used for statistical comparison of the groups (α=0.05). Results: The mean (±standard deviation) of the marginal gap of each group was as follows: the Control group was 91.15 (±15.35) µm, the Cerec group was 111.07 (±6.33) µm, and the Trios group was 60.17 (±11.09) µm. One-way ANOVA and the Scheffe post hoc test showed a statistically significant difference in the marginal gap between all groups. Conclusion: It can be concluded from the current study that all-ceramic crowns, fabricated using the CAD/CAM system, show a marginal accuracy that is acceptable in clinical environments. The Trios CAD group displayed the smallest marginal gap. Keywords: conventional impression, optical impression, extraoral scanner, all-ceramic crowns |
| first_indexed | 2024-04-12T13:37:20Z |
| format | Article |
| id | doaj.art-437deb9525f4489985321b5b663de8af |
| institution | Directory Open Access Journal |
| issn | 1179-1357 |
| language | English |
| last_indexed | 2024-04-12T13:37:20Z |
| publishDate | 2017-03-01 |
| publisher | Dove Medical Press |
| record_format | Article |
| series | Clinical, Cosmetic and Investigational Dentistry |
| spelling | doaj.art-437deb9525f4489985321b5b663de8af2022-12-22T03:30:58ZengDove Medical PressClinical, Cosmetic and Investigational Dentistry1179-13572017-03-01Volume 9131831898Marginal fit of all-ceramic crowns fabricated using two extraoral CAD/CAM systems in comparison with the conventional techniqueAlqahtani FFawaz Alqahtani1,2 1Department of Prosthodontics, 2Higher Education and Scientific Research, School of Dentistry, Prince Sattam Bin Abdul-Aziz University, Al-kharj, Saudi Arabia Objective: The purpose of this study was to determine the effect of two extraoral computer-aided design (CAD) and computer-aided manufacturing (CAM) systems, in comparison with conventional techniques, on the marginal fit of monolithic CAD/CAM lithium disilicate ceramic crowns. Study design: This is an in vitro interventional study. Place and duration of study: The study was carried out at the Department of Prosthodontics, School of Dentistry, Prince Sattam Bin Abdul-Aziz University, Saudi Arabia, from December 2015 to April 2016. Methodology: A marginal gap of 60 lithium disilicate crowns was evaluated by scanning electron microscopy. In total, 20 pressable lithium disilicate (IPS e.max Press [Ivoclar ­Vivadent]) ceramic crowns were fabricated using the conventional lost-wax technique as a control group. The experimental all-ceramic crowns were produced based on a scan stone model and milled using two extraoral CAD/CAM systems: the Cerec group was fabricated using the Cerec CAD/CAM system, and the Trios group was fabricated using Trios CAD and milled using Wieland Zenotec CAM. One-way analysis of variance (ANOVA) and the Scheffe post hoc test were used for statistical comparison of the groups (α=0.05). Results: The mean (±standard deviation) of the marginal gap of each group was as follows: the Control group was 91.15 (±15.35) µm, the Cerec group was 111.07 (±6.33) µm, and the Trios group was 60.17 (±11.09) µm. One-way ANOVA and the Scheffe post hoc test showed a statistically significant difference in the marginal gap between all groups. Conclusion: It can be concluded from the current study that all-ceramic crowns, fabricated using the CAD/CAM system, show a marginal accuracy that is acceptable in clinical environments. The Trios CAD group displayed the smallest marginal gap. Keywords: conventional impression, optical impression, extraoral scanner, all-ceramic crownshttps://www.dovepress.com/marginal-fit-of-all-ceramic-crowns-fabricated-using-two-extraoral-cadc-peer-reviewed-article-CCIDEConventional impressionoptical impressionextra-oral scannerall-ceramic crowns |
| spellingShingle | Alqahtani F Marginal fit of all-ceramic crowns fabricated using two extraoral CAD/CAM systems in comparison with the conventional technique Clinical, Cosmetic and Investigational Dentistry Conventional impression optical impression extra-oral scanner all-ceramic crowns |
| title | Marginal fit of all-ceramic crowns fabricated using two extraoral CAD/CAM systems in comparison with the conventional technique |
| title_full | Marginal fit of all-ceramic crowns fabricated using two extraoral CAD/CAM systems in comparison with the conventional technique |
| title_fullStr | Marginal fit of all-ceramic crowns fabricated using two extraoral CAD/CAM systems in comparison with the conventional technique |
| title_full_unstemmed | Marginal fit of all-ceramic crowns fabricated using two extraoral CAD/CAM systems in comparison with the conventional technique |
| title_short | Marginal fit of all-ceramic crowns fabricated using two extraoral CAD/CAM systems in comparison with the conventional technique |
| title_sort | marginal fit of all ceramic crowns fabricated using two extraoral cad cam systems in comparison with the conventional technique |
| topic | Conventional impression optical impression extra-oral scanner all-ceramic crowns |
| url | https://www.dovepress.com/marginal-fit-of-all-ceramic-crowns-fabricated-using-two-extraoral-cadc-peer-reviewed-article-CCIDE |
| work_keys_str_mv | AT alqahtanif marginalfitofallceramiccrownsfabricatedusingtwoextraoralcadcamsystemsincomparisonwiththeconventionaltechnique |