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KMID : 0358920200470020140
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Journal of the Korean Academy of Pedodontics
2020 Volume.47 No. 2 p.140 ~ p.147
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Retrospective Study on the Survival Rate of Preformed Metal Crowns in Permanent First Molars
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Oh Na-Young
Nam Soon-Hyeun
Lee Jae-Sik
Kim Hyun-Jung
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Abstract
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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.
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KEYWORD
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Permanent first molar, Preformed metal crown, Stainless steel crown, Survival rate
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