Technical Accuracy of Dental Laboratories in the Quality and Shade Matching of Porcelain Fused to Metal Crowns: An In Vitro Study
| Autor: | Khaled M. Alzahrani, Mohammed S. Bin-Shuwaish, Esraa A. Attar, Tariq Abduljabbar, Abdulaziz S. AlSani, Fahim Vohra, Yasser F. AlFawaz, Basil Almutairi, Ibrahim B. Abobakr, Hamad A. AlGamaiah |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
020205 medical informatics
Health Toxicology and Mutagenesis media_common.quotation_subject medicine.medical_treatment Laboratories Dental dental Dentistry Color lcsh:Medicine 02 engineering and technology adaptation Crown (dentistry) Article 03 medical and health sciences 0302 clinical medicine shade matching 0202 electrical engineering electronic engineering information engineering medicine In vitro study Quality (business) Shade matching media_common Mathematics Porcelain fused to metal laboratories business.industry crowns Colorimeter lcsh:R Public Health Environmental and Occupational Health technician 030206 dentistry work quality Dental Porcelain Work quality business Tooth |
| Zdroj: | International Journal of Environmental Research and Public Health International Journal of Environmental Research and Public Health, Vol 18, Iss 2722, p 2722 (2021) Volume 18 Issue 5 |
| ISSN: | 1660-4601 1661-7827 |
| Popis: | Dental laboratories (LABs) are integral to the performance of a dentist in providing successful oral rehabilitation. The aim of this study was to compare the adaptation, contour, contacts, and shade matching of different government and commercial dental LABs in the fabrication of porcelain fused to metal (PFM) crowns. Thirty-two dental LABs were selected to fabricate PFM crowns (one PFM crown each). Marginal adaptation, contour, proximal contacts, and shade matching were evaluated. Evaluation of the crowns’ quality was performed following modified USPHS/FDI criteria. Visual and colorimeter assessments were employed to evaluate shade matching. Differences between groups were examined by Pearson’s Chi-square and Fisher’s exact test. The quality of marginal adaptation of crowns was good in 81.25%, however the quality of contours, contacts, and shade matching was compromised in 43.75%, 59.38%, and 39% of all LABs, respectively. Visual and colorimeter shade matching was acceptable in 62.5% and 80% of LABs in the cervical third and middle third regions of crowns, respectively, however in the incisal third the shade matching was unacceptable in nearly 60% of LABs. Commercial laboratories showed significantly better contours and shade matching, but not marginal adaptation. However, no significant differences were found in comparison of proximal contacts between the groups. |
| Databáze: | OpenAIRE |
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