Retrospective Study on the Survival Rate of Preformed Metal Crowns in Permanent First Molars
Na-Young Oh, Soon‐Hyeun Nam, Jaesik Lee, Hyun‐Jung Kim
Abstract
This study analyzed the longevity of preformed metal crowns (PMCs) in first permanent molars and evaluated factors influencing their survival during a long-term follow-up period. In all, 115 first permanent molars treated with PMCs between June 2008 and June 2018 were retrospectively analyzed. The overall combined success rate for the study group was 84.3%. The 5-year survival rate was 82.8%. Multivariate Cox regression analyses identified distal cavities and mandibular PMC placement as risk factors for restoration failure. Careful placement of PMCs at the final try-in stage augments the longevity of the crown.
Topics & Concepts
MolarMedicineDentistryLongevityCrown (dentistry)Proportional hazards modelSurvival rateRetrospective cohort studyOrthodonticsSurgeryGerontologyDental materials and restorationsEndodontics and Root Canal TreatmentsDental Radiography and Imaging