<p>Survival Rates of Endodontically Treated Teeth After Placement of Definitive Coronal Restoration: 8-Year Retrospective Study</p>

Abstract

Introduction: Preservation of endodontically treated teeth (ETT) depends upon several patient-related and operator-related factors. The objectives of this study were to assess the effects of different types of coronal restoration and delayed placement on ETT survival. Methods: Data on dates of root canal treatment (RCT), restoration type, and extraction time of tooth, when applicable, were analyzed for all patients who underwent RCT from 2010 to 2018 at our institution. Inclusion Criteria: Root canal-treated teeth with complete preoperative and postoperative radiographs; ETT that were restorable and received final permanent coronal restorations; no periodontal disease or crack detected during RCT; and ETT with acceptable RCT quality. Exclusion Criteria: Patients who did not attend for follow-up, those had incomplete information available about the coronal restoration, and those with periodontally compromised teeth were excluded. ETT that involved any procedural error were also excluded. The teeth were categorized according to whether they underwent definitive coronal restoration 0-14 days, 15-59 days, or 60+ days after RCT. The statistical analysis was performed using SPSS version 25 (IBM Corp., Armonk, NY). The rate of survival of ETT of 8 years was estimated, and the differences between groups were determined after applying Kaplan-Meier statistics and log-rank tests. A multivariate Cox regression test and Wilcoxon (Gehan) statistics were computed to analyze the influence of different variables. A P-value <0.05 was considered as statistically significant. Results: The type of restoration, opposing dentition, presence of a post, and dentistry training (year 4 or 5 students) showed significant effects on the survival of ETT (P ≤ 0.000). ETT which received crowns was 2.05 times more likely to need extraction than those in which a composite buildup was performed (hazard ratio [HR] 2.05; confidence interval [CI] 1.84-2.29; P ≤ 0.000). All composite buildups were performed within 14 days of completion of RCT. There was a significant correlation between the time of placement of the final coronal restoration and ETT survival (P ≤ 0.000). Extraction of ETT was 25% more likely (HR 0.25; CI 0.231-0.277) when the final coronal restoration was placed 15-59 days after completion of RCT and 73% more likely (HR 0.73; CI 0.655-0.814) when placed after 60 days than when placed at 0-14 days. Conclusion: Timely placement of the final coronal restoration is found to be the most critical factor affecting the long-term survival of teeth after RCT.

Effect of Root Canal Therapy Combined with Full Crown Restoration on the Level of Inflammatory Factors and Chewing Function in Patients with Cracked Teeth and Chronic Pulpitis

“…After the repair, when the patient chews hard food for a long time, it will form a point-to-point contact with more concentrated stress, which is easy to cause complications such as difficulty in chewing and occlusal discomfort, and it is difficult to maintain a good long-term curative effect. Full crown restoration is a kind of dental restoration method that uses restorative materials to cover the crown and cemented with cement, which can prevent tooth fracture, restore the occlusal relationship of the teeth, and maintain the order of the dentition tidiness [ 14 ]. In clinical practice, casting full crowns or porcelain full crowns are often used for full crown restoration, but the teeth after casting full crowns have poor aesthetics, and it is easy to cause gingival bleeding, redness and swelling, and other complications [ 15 ].…”

Factors associated with decision-making of replacing the temporary coronal restoration after endodontic treatment

“…According to Sadaf 4 (2020), it is possible to increase the survival rate of an endodontically-treated tooth with a well-performed coronary restoration. In a retrospective study evaluating private clinical data in Germany, approximately 86% of the 795 endodontically-treated tooth restorations with an average follow-up of 4.5 years were considered successful, and the annual failure rate was minimal 13 .…”

“…If there are failures in one of these stages, the treatment case may fail 1 . It is also important to point out that the immediate coronary and quality sealing directly influences the longevity of the endodontic treatment and survival of these elements [2][3][4] . The final restoration can be direct or indirect, depending on the amount of coronal structure and the type of cavity that the element shows, promoting a shield at the mouth of the root canal to prevent bacterial microleakage and enhance and protect the tooth structure 5 .…”

Dientes posteriores tratados endodónticamente: Alternativas para su rehabilitación basadas en evidencia científica. Revisión de la literatura

“…Corresponde a la clase 4 de Zarow, en la cual se indica la extracción del DTE, esto puede suceder por dos razones: por la complejidad del tratamiento a realizar (Zarow et al, 2018) o por el lapso de tiempo en el que se coloca la restauración coronal, dando un 25% más de probabilidad de extraer la pieza si la restauración es efectuada entre 15-59 días posteriores al tratamiento endodóntico y un 73% luego de los 60 días (Sadaf, 2020).…”