Asma Naz BDS, FCPS
Hira Musharraf BDS, FCPS
Atif Jawad BDS, FCPS
Kainat Zia BDS
Bharat Kumar BDS, FCPS
Muneeb Ahmed Lone BDS, FCPS
OBJECTIVE: The purpose of this study was to evaluate reasons of failure for conventional crowns and fixed partial dentures in patients reporting to the Prosthodontics OPD.
METHODOLOGY: This cross sectional study was carried out in the Department of Prosthodontics at Jinnah Medical and Dental College, Karachi from December 2018 to September 2019. A total of 149 patients were enrolled in the study using nonprobability, consecutive sampling technique. The demographic data was recorded and patients were examined to assess the cause of failure of fixed dental prosthesis. SPSS version 22 was used for statistical analysis.
RESULTS: The mean age of the 149 prosthesis examined was 4.78 ± 4.37 years. Most of the failures 130 (87.2%) were due to biologic causes. Almost all of the patients (98.0%) cleaned their teeth by brushing. The mean life span of the 145 porcelain fused to metal prosthesis examined was 4.89 ± 4.38 years. Most of the failed restorations were single unit with a mean prosthesis age of 4.27 ± 4.26 years while 7 (4.7%) fixed partial dentures had greater than 5 units and had a mean life of 11.6 ± 5.45 years.
There was a statistically significant difference in the failure of prosthesis according to its position in the dental arch (p< 0.02)
CONCLUSION: Fixed dental prostheses provide one of the best treatment modalities for replacing teeth. At present the average life of prosthesis at 4 years is less than satisfactory. To improve the longevity of these restorations it is necessary to have proper patient selection, diagnosis, treatment planning, clinical and technical skills. It is also essential to educate the patient about proper oral hygiene and prosthesis maintenance so that the life span of fixed prosthesis is increased.
KEYWORDS: porcelain fused to metal restoration, fixed dental prosthesis, biologic failure
HOW TO CITE: Naz A, Musharraf H, Jawad A, Zia K, Kumar B, Lone MA. Assessment of failure of prosthesis in fixed prosthodontics among patients reporting to a teaching dental hospital of Karachi. J Pak Dent Assoc 2020;29(3):105-109.
Received: 23 November 2019, Accepted: 12 May 2020