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Tytuł:
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Evaluation of the marginal microleakage of CAD-CAM compared with conventional interim crowns luted with different types of cement: An in-vitro study.
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Autorzy:
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Robaian A; Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Alkharj, Kingdom of Saudi Arabia.
Maawadh A; Department of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia.
Alghomlas ZI; Dental student, College of Dentistry, Prince Sattam Bin Abdulaziz University, Alkharj, Kingdom of Saudi Arabia.
Alqahtani AM; General Dental Practitioner, Riyadh, Kingdom of Saudi Arabia.
Alothman TA; Dental student, College of Dentistry, Prince Sattam Bin Abdulaziz University, Alkharj, Kingdom of Saudi Arabia.
Alhajri FF; Dental student, College of Dentistry, Prince Sattam Bin Abdulaziz University, Alkharj, Kingdom of Saudi Arabia.
Albar N; Department of Restorative Dental Sciences, College of Dentistry, Jazan University, Jazan, Kingdom of Saudi Arabia.
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Źródło:
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Nigerian journal of clinical practice [Niger J Clin Pract] 2021 Jun; Vol. 24 (6), pp. 828-832.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: Mumbai : Medknow Publications
Original Publication: [Lagos?] : Medical and Dental Consultants' Association of Nigeria
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MeSH Terms:
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Computer-Aided Design*
Crowns*
Cementation ; Dental Cements ; Glass Ionomer Cements ; Materials Testing ; Resin Cements ; Tooth Preparation
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Contributed Indexing:
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Keywords: CAD-CAM system; interim crowns; luting cement; marginal leakage
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Substance Nomenclature:
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0 (Dental Cements)
0 (Glass Ionomer Cements)
0 (Resin Cements)
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Entry Date(s):
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Date Created: 20210614 Date Completed: 20210615 Latest Revision: 20220423
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Update Code:
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20240105
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DOI:
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10.4103/njcp.njcp_374_20
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PMID:
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34121729
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Background: Temporary stage in crowns and bridgework plays an important role in the success and failure of the final restorations. Lack of marginal seal of the temporary restorations can lead to further complications. Recently, digital dentistry has been improved in terms of marginal integrity.
Aims: The aim of this study was to evaluate and compare the marginal leakage between CAD/CAM and conventionally made Polymethyl methacrylate (PMMA) interim crowns cemented with different temporary luting cements.
Materials and Methods: Sixty resin dies of a maxillary right first premolar were prepared according to the protocol of the tooth preparation for all-ceramic crown. Interim crowns were then fabricated and assigned to two main groups according to the fabrication technique (CAD/CAM technique and conventional technique). Furthermore, the samples were sub-grouped (n = 10) according to the type of the luting cements: Zinc oxide eugenol (RelyX temp E), Zinc oxide non-eugenol (RelyX temp NE), and Zinc polycarboxylate cement (pentron). The specimens were then subjected to thermocycling at 5°C and 55°CC for 30 sec and transfer time of 15 seconds for 1500 cycles. After that, the specimens were immersed in a 2% methylene blue solution for 24 hours. The cemented specimens were sectioned buccolingually and the amount of marginal leakage was evaluated under digital microscope at magnification 50x. The scores of dye penetration were recorded and analyzed using one-way ANOVA at P < 0.05 for all tests.
Results: For the fabrication technique, CAD/CAM-made interim crowns had significantly better performance in terms of lower microleakage in comparison to conventionally built interim crowns (P < 0.001). Overall, Zinc Oxide non-eugenol also showed significantly least microleakage as a luting cement then Zinc Oxide Eugenol and the most microleakage was found with Zinc Polycarboxylate regardless of the fabrication method.
Conclusion: Interim crowns fabricated by CAD-CAM system are better suited for temporization. Zinc-oxide non-eugenol cements showed the least amount of microleakage in both types of crown.
Competing Interests: None
