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Longevity of anterior resin‐bonded bridges: survival rates of two tooth preparation designs
Author(s) -
Abuzar M,
Locke J,
Burt G,
Clausen G,
Escobar K
Publication year - 2018
Publication title -
australian dental journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.701
H-Index - 71
eISSN - 1834-7819
pISSN - 0045-0421
DOI - 10.1111/adj.12612
Subject(s) - longevity , dentistry , medicine , cohort , exact test , resin composite , groove (engineering) , survival rate , overall survival , survival analysis , cohort study , orthodontics , surgery , mathematics , materials science , gerontology , composite number , algorithm , metallurgy
Background Significant developments have occurred in the design of resin‐bonded bridges ( RBB ) over the past two decades. They are commonly used as an alternative treatment option for a single missing tooth. The longevity of these bridges needs to be further investigated to evaluate long‐term outcomes for this option to remain relevant. Methods A cohort of patients who received anterior resin‐bonded bridges ( ARBB ) over two decades was studied retrospectively. Longevity of 206 ARBB was assessed using Kaplan–Meier probability estimates. The two modified tooth preparation designs investigated were: (A) mesial and distal vertical grooves only; and (B) one proximal groove adjacent to the pontic and two palatal grooves. Age and gender of the patient cohort were also recorded. Results Overall survival rate of ARBB was 98% at 5 years, 97.2% at 10 years, and 95.1% from 12 years till 21 years. Survival curves showed minor differences when compared for the two designs, age groups and gender of ARBB recipients. Differences in the proportion of surviving bridges for design A (95.96%) and design B (98.13%) were not statistically significant (Fisher's exact test). Conclusions Anterior RBB with described tooth preparation designs demonstrate a high survival rate.