Evaluation of related factors in the failure of endodontically treated teeth: A cross-sectional study

WOS: 000418878600007PubMed ID: 29246376Introduction: The aim of this study was to review the factors related to the failure and extraction of unsuccessful endodontically treated teeth. Methods: A total of 1000 teeth treated with nonsurgical root canal therapy were analyzed, and the following information was recorded for each patient: reasons for failure and extraction, type of tooth, presence and type of coronal restoration, smoking status, age, gender, and level of education. One main reason was recorded for each failed tooth. The associations between reasons for failure, patient, and tooth were tested by using chi(2) analysis. Results: Of the 1000 endodontically failed teeth analyzed in this study, 28.1% (n = 281) were extracted, 66% (n = 660) were re-treated, and 5.9% (n = 59) were treated with apical surgery. Among the reasons for failure, restorative and endodontic reasons were seen most frequently (43.9%, n = 439), whereas orthodontic reasons were seldom seen (0.1%, n = 1). The most common reason for extraction was for prosthetic reasons (40.8%), and perforation/stripping was the least common (2.9%). The mandibular first molars were the most frequently extracted teeth (27.4%, n = 77). Conclusions: The most common reason for the extraction of endodontically treated teeth was for prosthetic reasons. Among the reasons for failure, restorative and endodontic reasons were the most frequently seen, and orthodontic reasons were the most seldom. The teeth that failed most frequently were mandibular first molars, and the teeth that failed least frequently were maxillary third molars. The most common reason for the extraction of failed endodontically treated teeth was for prosthetic reasons.Scientific Research Projects Coordination Center of Selcuk University (BAP), Konya, Turkey [11202018]The study has been supported by Scientific Research Projects Coordination Center of Selcuk University (BAP), Konya, Turkey (project number: 11202018). This study was performed in Endodontics and Oral & Maxillofacial Surgery Departments of Faculty of Dentistry, Selcuk University

Efeitos dos medicamentos intracanais e do muro de cavidade remanescente na força de fratura dos molares endodonticamente tratados

Objective: The aim of this study was to investigate the effects of the short-term intracanal application of two medicaments on the fracture strength of root-filled molar teeth with different levels of tooth structure loss. Material and Methods: Standard access cavities of totally 84 intact maxillary molar teeth were prepared in 72 teeth and were divided into 3 main groups. Standard access cavities were vkept in the first group, while mesio-occlusal-distal cavities (MOD) were prepared in the second and third groups. One-half of the palatinal walls were removed in the third group. Twelve sound teeth were used in the fourth group as control. Each group was then assigned into two subgroups according to the medicament used (n=12): 2% chlorhexidine gel and calcium hydroxide. Samples were stored at 37°C and 100% humidity for 1 week. Then the teeth were inserted into a universal testing machine and vertically loaded (5 mm/min) from the occlusal surface. The data was recorded in Newtons and statistically evaluated using a Univariate ANOVA and a Tukey as post hoc test. Results: A significant difference was found among the test groups (p0.05), however the number of remaining walls significantly affected the fracture strength (p 0,05), no entanto, o número de paredes restantes afetou significativamente a resistência à fratura (p <0,01). O primeiro grupo com cavidade de acesso apresentou fracturas principalmente reparáveis (60% -80%), enquanto as demais apresentaram padrões de fratura não reparáveis (60% -90%). Conclusão: Em conclusão, a resistência à fratura dos dentes tratados endodonticamente está relacionada à perda da estrutura em vez do medicamento intracanal utilizado

Geçici restoratif dolgu materyali olarak politetrafloroetilen bant (Ptfe): Sıvı filtrasyon çalışması

WOS: 000409813800003PubMed ID: 28955541Purpose: The purpose of this study was to compare the sealing ability of temporary restorative materials at 24 hrs and 1 week. Materials and Methods: Endodontic access cavities were prepared in 56 extracted lower incisor-teeth and divided into 5 groups (n=10). Standard 5 mm deep access preparations were completed and root canals were prepared to size ISO # 30 file. The access cavities were restored as follows: Group 1: temporary restorative material (Ceivitron); Group 2: glass ionomer cement (Fuji II); Group 3: zinc oxide-eugenol cement (IRM); Group 4: zinc phosphate cement (Adhesor); Group 5: polytetrafluoroetylene tape (PTFE). The quality of the coronal sealing of each specimen was measured (24 hrs and 1 week) using fluid transport model. The data was analysed with repeated measurements of ANO VA, Tukey, Paired samples T-Tests. Results: A significant difference was found among the groups at all time-periods (p0.05). Sealing ability of IRM and PTFE groups significantly increased by time (p0.05). IrM ve PTFE gruplarının sızıntı değeri zamanla önemli derecede azaldı (p < 0.05 ve p < 0.001 sırasıyla). Sonuç: Bu çalışmanın sınırları dâhilinde, PTFE, 1 haftalık ölçümlerde, diğer sıklıkla kullanılan geçici dolgu materyalleri ile kıyaslandığında, kabul edilebilir bir kısa-dönem sızdırmazlık kabiliyeti göstermişti