Evaluation of the Clinical Performance of NuSmile Pedodontics Zirconia Crowns in Pulp-Treated Primary Teeth—2 Years Follow-Up Study

Abstract

Objectives There is a lack of information regarding the longevity of prefabricated crowns on primary teeth. Therefore, the objective of the present study was to evaluate the clinical success rate of NuSmile pediatric Zirconia crowns in both primary anterior and posterior teeth up to 2 years in terms of gingival health, levels of plaque, restoration failure, and marginal integrity. Materials and Methods This interventional study evaluated the clinical performance of NuSmile primary Zirconia crowns on 232 (172 primary incisors and 60 primary molars) pulp-treated primary teeth. Statistical analysis included independent t-test and Kaplan–Meier survival method for which the level of significance was set up at p < 0.05. Results Gingival and plaque index of the teeth restored with NuSmile Zirconia crowns (test tooth) compared with adjacent and antagonist teeth (control tooth) showed no statistically significant difference at all time intervals (p > 0.05). The Kaplan–Meier survival graph indicated that only 34% of NuSmile Zirconia incisor crowns and 86% of NuSmile Zirconia molar crowns have survived at the end of 24 months. Of the 172 NuSmile Zirconia incisor crowns placed, only 82 teeth survived at the end of 2 years and the majority of the crowns completely lost the Zirconia crown. The Kaplan–Meier graph also indicated that more than two-thirds of crowns, i.e., 90% incisor crowns and 76% of molar crowns, had good marginal integrity at the end of 24 months. Conclusions Zirconia pediatric crowns preserve and maintain gingival health and have long-term survival rates with good retention and marginal integrity, indirectly preventing secondary caries. Hence, Zirconia pediatric crowns are a well-suited restoration of choice for primary teeth rehabilitation.

The Effect of Pulp Treatments on the Survival of Zirconia Crowns in Primary Teeth

“…When the literature is reviewed, there are studies that evaluate the clinical performance of prefabricated pedodontic ZCs and compare them with other restorative materials. 22,23 However, there is limited information regarding the effect of pulpal treatments on the survival of pedodontic ZCs. Therefore, in our study, the effects of pulpal treatments on the survival of ZCs, as well as factors such as age and gender, were evaluated.…”

Comparative Evaluation of the Survival Rates of Zirconia Crown and Stainless Steel Crown for Proximal Caries in Primary Molars: a Retrospective Study

“…유치용 지르코니아 전장관이 EZ-pedo에 의해 소개되어, 2008년부터 유전치용 지르코니아 전장관을 상업적으로 이용할 수 있게 되었다 [7]. 지르코니아는 오래전부터 영구치 보철물로 널리 사용될 만큼 뛰어난 심미성, 우수한 기계적 강도, 높은 부 식 저항성 및 생체친화성 등을 지니고 있다 [11,12]. 또한 다양한 크기, 형태 및 색상이 이용 가능하므로 치료 시 임상가들에게 폭넓은 선택지를 제공할 수 있다 [13].…”