EVALUATION OF MARGINAL ADAPTATION IN METAL-CERAMIC VERSUS ALL-CERAMIC FIXED PARTIAL DENTURES USING CLINICAL METHODS
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Keywords
Marginal adaptation; Fixed partial denture; Metal-ceramic restoration; All-ceramic restoration; Zirconia FPD
Abstract
Background: Marginal adaptation is a critical determinant of the biological and mechanical success of fixed partial dentures (FPDs). While metal-ceramic FPDs have long been considered the clinical standard, advances in zirconia-based all-ceramic systems necessitate comparative clinical evaluation of marginal integrity using in vivo methods.
Aim: To clinically compare marginal adaptation of metal-ceramic and zirconia-based all-ceramic three-unit fixed partial dentures using standardized clinical assessment methods over a 12-month period.
Materials and Methods: This prospective comparative study included 60 patients requiring posterior three-unit FPDs, divided equally into metal-ceramic (Group MC) and all-ceramic zirconia-based (Group AC) groups. Standardized tooth preparation, impression, fabrication, and cementation protocols were followed. Marginal adaptation was evaluated at baseline, 6 months, and 12 months using modified United States Public Health Service (USPHS) criteria and the silicone replica technique for marginal gap measurement. Statistical analysis was performed with significance set at p<0.05.
Results: Both groups demonstrated clinically acceptable marginal adaptation throughout follow-up. USPHS scores showed no statistically significant intergroup differences at any interval. Mean marginal gap values increased over time in both groups; however, at 12 months, the all-ceramic group exhibited significantly lower marginal gaps compared to the metal-ceramic group (p=0.02). Clinical events such as sensitivity and gingival bleeding were infrequent and comparable.
Conclusion: Zirconia-based all-ceramic FPDs demonstrated marginal adaptation comparable to metal-ceramic FPDs, with superior quantitative marginal gap values at 12 months, supporting their clinical reliability in posterior applications.
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Dr Pragya Bali
Medical Officer, MDS, Prosthodontist, Civil Hospital Sundernagar, Dist. Mandi, Himachal Pradesh.
Dr Vyvika Chinthapally
[email protected], Validation Engineer at Pfizer, Rocky Mount, North Carolina, USA.
Dr. Rahul Tiwari
PhD Research Scholar, Department of Oral and Maxillofacial Surgery, Narsinhbhai Patel Dental College and Hospital, Sankalchand Patel University, Visnagar, Gujarat, India.
Dr. Rahul Tiwari
PhD Research Scholar, Department of Oral and Maxillofacial Surgery, Narsinhbhai Patel Dental College and Hospital, Sankalchand Patel University, Visnagar, Gujarat, India.
Dr. Heena Dixit Tiwari
Programme Officer, Blood Cell, Commisionerate of Health and Family Welfare, Government of Telangana, Hyderabad, India
Dr. Akriti
MDS, Senior Lecturer, Department of Oral medicine and radiology, Desh Bhagat Dental College and Hospital, Mandi Gobindgarh, Punjab.
Dr. Afroz Kalmee Syed Mahajan
MDS, Oral And Maxillofacial Pathology, Scientific Medical Writer, Writing and Publications, Tenali, AP.
