Acta Scientific Dental Sciences (ISSN: 2581-4893)

Research Article Volume 6 Issue 8

Placement of Borders of Metal and Ceramic Copings and their Influence on Aesthetics of Crowns an in vitro study conducted on extracted premolars using spectrophotometer

Pavan TP1, K Chandrasekharan Nair2*, Divya Hegde3 and Jaykar Shetty3

1Reader, Department of Prosthodontics, KGF College of Dental Sciences and Hospital, Kolar Gold Fields, Kolar, Karnataka, India
2Professor Emeritus, Department of Prosthodontics, Sri Sankara Dental College, Akathumuri, Thiruvananthapuram, Kerala, India
3Former Professor, Department of Prosthodontics, AECS Maaruti College of Dental Sciences, Bangalore, India

*Corresponding Author: K Chandrasekharan Nair, Professor Emeritus, Department of Prosthodontics, Sri Sankara Dental College, Akathumuri, Thiruvananthapuram, Kerala, India.

Received: July 13, 2022; Published: July 29, 2022

Abstract

Objectives: To find out the colour change that occurs in the metal-ceramic and all-ceramic crowns, with full collar, 1 mm and 2 mm cutbacks employed in the substructure, using spectrophotometer.

Materials and Methods: Three recently extracted maxillary premolars with no signs of damage or discoloration were mounted on an acrylic block. Color of the teeth was measured using spectrophotometer before the preparation and teeth were prepared conventionally to receive full coverage restorations. For each of the prepared tooth metal-ceramic and all ceramic (IPS Empress -lithium disilicate, Zirconia) crowns with full collar, 1 mm and 2mm cutbacks in their substructure were prepared and colour was measured using Spectrophotometer.

Results: Among the materials Zirconia showed the maximum colour change and among the collars full collar showed the highest colour change.

Conclusions: 1. Among the materials higher colour changes were recorded with Zirconia followed by IPS-Empress, and metal ceramic. 2. Among the three collars, higher colour changes were recorded with full collar, followed by 2mm cut back and 1 mm cut back. 3. Among all-ceramic crowns IPS Empress crowns showed less change in colour than the Zirconia. 4. Amongst the three types of crowns fabricated, zirconia exhibited higher change in colour than IPS Empress and metal-ceramic. 5.Presence of a full collar in the metal-ceramic crowns, IPS Empress and zirconia crowns can cause colour change. To obtain colour match it is desirable to employ cutback preferably of 2 mm.

 

Keywords: Metal Ceramic Crowns; Zirconia; IPS Empress Crowns; Cutback; Spectrophotometer

References

  1. McLean JW. “The science and art of dental ceramics. Volume I: the nature of dental ceramics and their clinical use”. Chicago: Quintessence Publishing Co Inc (1979): 102-110.
  2. Mayekar SM. “Shades of a color. Illusion or reality?” Dental Clinics of North America 45 (2001): 155-172.
  3. Kelly JR., et al. “Ceramics in dentistry: historical roots and current perspectives”. Journal of Prosthetic Dentistry 75 (1996): 18-32.
  4. Walton JN., et al. “A survey of crown and fixed partial denture failures: length of service and reasons for replacement”. Journal of Prosthetic Dentistry 56 (1986): 416-421.
  5. Jacobs SH., et al. “Effects of porcelain thickness and type of metal-ceramic alloy on color”. Journal of Prosthetic Dentistry 57 (1987): 138-145.
  6. Borse S and Chaware SH. “Tooth shade analysis and selection in prosthodontics: Asystematic review and meta‑analysis”. The Journal of Indian Prosthodontic Society 20 (2020): 131-140.
  7. Johnston WM and Kao EC. “Assessment of appearance match by visual observation and clinical colorimetry”. Journal of Dental Research 68 (1989): 819-822.
  8. Gianluca Paniz., et al. “Influence of framework design on the cervical colour of metal ceramic crowns”. Journal of Prosthetic Dentistry 106 (2011): 310-318.

Citation

Citation: K Chandrasekharan Nair., et al. “Placement of Borders of Metal and Ceramic Copings and their Influence on Aesthetics of Crowns an in vitro study conducted on extracted premolars using spectrophotometer". Acta Scientific Dental Sciences 6.8 (2022): 125-134d.

Copyright

Copyright: © 2022 K Chandrasekharan Nair., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.




Metrics

Acceptance rate30%
Acceptance to publication20-30 days
Impact Factor1.278

Indexed In





News and Events


  • Certification for Review
    Acta Scientific certifies the Editors/reviewers for their review done towards the assigned articles of the respective journals.
  • Submission Timeline for Upcoming Issue
    The last date for submission of articles for regular Issues is December 25, 2024.
  • Publication Certificate
    Authors will be issued a "Publication Certificate" as a mark of appreciation for publishing their work.
  • Best Article of the Issue
    The Editors will elect one Best Article after each issue release. The authors of this article will be provided with a certificate of "Best Article of the Issue"

Contact US









ff

© 2024 Acta Scientific, All rights reserved.