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Retrospective Study on the Survival Rate of Preformed Metal Crowns in Permanent First Molars

대한소아치과학회지 2020년 47권 2호 p.140 ~ 147
오나영 ( Oh Na-Young ) - Kyungpook National University Dental Hospital Department of Pediatric Dentistry

남순현 ( Nam Soon-Hyeun ) - Kyungpook National University School of Dentistry Department of Pediatric Dentistry
이재식 ( Lee Jae-Sik ) - Kyungpook National University School of Dentistry Department of Pediatric Dentistry
김현정 ( Kim Hyun-Jung ) - Kyungpook National University School of Dentistry Department of Pediatric Dentistry

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.

키워드

Permanent first molar; Preformed metal crown; Stainless steel crown; Survival rate
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