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

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.

An update of treatment modalities in children and adolescents with teeth affected by molar incisor hypomineralisation (MIH): a systematic review

“…Preformed metal crowns may also be used occasionally as an interim measure until scheduled extraction (Taylor et al 2019 ), especially as they have the advantage of maintaining the structural integrity of the tooth without causing any adverse symptoms (Lygidakis 2010 ). Across the three studies only 88 teeth were restored, with one of the studies also including patients with caries and other dental anomalies, thus increasing the risk of bias (Oh et al 2020 ). Two of the three studies had a retrospective design (Kotsanos et al 2005a , b ; Oh et al 2020 ) and all three studies used different outcome measures.…”

“…Two of the composite resin restoration studies addressed the impact of bonding technique and found no difference between a total-etch adhesive approach and self-etch adhesive approach (de Souza et al 2017;Rolim et al 2020). Preformed metal crowns (PMC) were used in three studies (Kotsanos et al 2005a, b;Koleventi et al 2018;Oh et al 2020) with consistent results noted. Four studies looked at laboratory-manufactured crowns (Gaardmand et al 2013;Dhareula et al 2018Dhareula et al , 2019Linner et al 2020) with approaches such as cast adhesive gold copings (Gaardmand et al 2013), indirect composite resin onlays (Dhareula et al 2018) and ceramic restorations (Linner et al 2020) tested.…”

“…An alternative approach for severely affected molars is to use preformed metal crowns. Despite only three studies included in this review using PMC for MIH-affected molars, they outperformed all other restorative materials with one study reporting 86% success (Oh et al 2020) and others reporting a 100% success rate (Kotsanos et al 2005a, b;Koleventi et al 2018). Preformed metal crowns may also be used occasionally as an interim measure until scheduled extraction (Taylor et al 2019), especially as they have the advantage of maintaining the structural integrity of the tooth without causing any adverse symptoms (Lygidakis 2010).…”

Best clinical practice guidance for clinicians dealing with children presenting with molar-incisor-hypomineralisation (MIH): an updated European Academy of Paediatric Dentistry policy document

“…Preformed metal crowns (PMC) are an inexpensive option with reported high success rates (Kotsanos et al 2005 ; Koleventi et al 2018 ; Oh et al 2020 ). They have the additional advantage of maintaining the structural integrity of the tooth whilst alleviating symptoms of hypersensitivity, maintaining the occlusal contact and can be placed in one visit making them ideal for use in teeth where multiple surfaces are involved.…”

Update zur Ätiologie und Behandlung der Molaren-Inzisiven-Hypomineralisation

“…Konfektionierte Stahlkronen wurden in 3 Studien bewertet [27,28,36], wobei vergleichbare Erfolgsraten (86-100 % nach 6 bis 54 Monaten) festgestellt wurden (Abb. 3, Abb.…”