DOI: https://doi.org/10.36347/sjams.2025.v13i11.030

Pages: 1967-1970

Background: Crowns and bridges are most commonly used for esthetics and functions in Bangladesh and all over the world. These prostheses fail due to decementation and porcelain crack for various reasons where a need arise for removal or disassembly full or by fragments. The study aimed to determine the causes and classes of crown and fixed partial denture disassembly. Materials and Methods: This cross-sectional study was conducted at Attrai and Raninagar upazila from April 1st 2025 to October 30th 2025. A total of 200 patients including males and females, who reported at Dr Maksudul Alam Dental Care and Dental Surgeons dental care in Naogaon District, Bangladesh for their failed PFM crowns and bridges, were included in the study. Results: The study included 40% males (n=80) and 60% female (n=120) with a ratio of 0.85. Patients had an age ranging from 18 to 63 years (mean 46 years, SD ± 15.8 years). Failed crowns were more than bridges. Failed prostheses were found more in mandibular arch (54%, n=108) and mostly in posterior segments (80%, n=160) of arches. Majority of prostheses were porcelain fused to metal and biological failure (62%, n=124) was the main reason for prosthesis disassembly. In more than 75% of cases prostheses were removed conservatively. Conclusions: Caries and pulpal involvement of the abutment teeth was identified as the primary cause for the failure and subsequently removal of most porcelain fused to metal restorations. In the majority of cases, the disassembly procedure was carried out using conservative techniques to preserve the remaining tooth structure as much as possible.