Root canal retreatment: a retrospective investigation using regression and data mining methods for the prediction of technical quality and periapical healing

Objectives: This study aimed to investigate patterns and risk factors related to the feasibility of achieving technical quality and periapical healing in root canal non-surgical retreatment, using regression and data mining methods. Methodology: This retrospective observational study included 321 consecutive patients presenting for root canal retreatment. Patients were treated by graduate students, following standard protocols. Data on medical history, diagnosis, treatment, and follow-up visits variables were collected from physical records and periapical radiographs and transferred to an electronic chart database. Basic statistics were tabulated, and univariate and multivariate analytical methods were used to identify risk factors for technical quality and periapical healing. Decision trees were generated to predict technical quality and periapical healing patterns using the J48 algorithm in the Weka software. Results: Technical outcome was satisfactory in 65.20%, and we observed periapical healing in 80.50% of the cases. Several factors were related to technical quality, including severity of root curvature and altered root canal morphology (p<0.05). Follow-up periods had a mean of 4.05 years. Periapical lesion area, tooth type, and apical resorption proved to be significantly associated with retreatment failure (p<0.05). Data mining analysis suggested that apical root resorption might prevent satisfactory technical outcomes even in teeth with straight root canals. Also, large periapical lesions and poor root filling quality in primary endodontic treatment might be related to healing failure. Conclusion: Frequent patterns and factors affecting technical outcomes of endodontic retreatment included root canal morphological features and its alterations resulting from primary endodontic treatment. Healing outcomes were mainly associated with the extent of apical periodontitis pathological damages in dental and periapical tissues. To determine treatment predictability, we suggest patterns including clinical and radiographic features of apical periodontitis and technical quality of primary endodontic treatment

Root canal retreatment : a retrospective investigation using regression and data mining methods for the prediction of technical quality and periapical healing

Objectives: This study aimed to investigate patterns and risk factors related to the feasibility of achieving technical quality and periapical healing in root canal non-surgical retreatment, using regression and data mining methods. Methodology: This retrospective observational study included 321 consecutive patients presenting for root canal retreatment. Patients were treated by graduate students, following standard protocols. Data on medical history, diagnosis, treatment, and follow-up visits variables were collected from physical records and periapical radiographs and transferred to an electronic chart database. Basic statistics were tabulated, and univariate and multivariate analytical methods were used to identify risk factors for technical quality and periapical healing. Decision trees were generated to predict technical quality and periapical healing patterns using the J48 algorithm in the Weka software. Results: Technical outcome was satisfactory in 65.20%, and we observed periapical healing in 80.50% of the cases. Several factors were related to technical quality, including severity of root curvature and altered root canal morphology (p<0.05). Follow-up periods had a mean of 4.05 years. Periapical lesion area, tooth type, and apical resorption proved to be significantly associated with retreatment failure (p<0.05). Data mining analysis suggested that apical root resorption might prevent satisfactory technical outcomes even in teeth with straight root canals. Also, large periapical lesions and poor root filling quality in primary endodontic treatment might be related to healing failure. Conclusion: Frequent patterns and factors affecting technical outcomes of endodontic retreatment included root canal morphological features and its alterations resulting from primary endodontic treatment. Healing outcomes were mainly associated with the extent of apical periodontitis pathological damages in dental and periapical tissues. To determine treatment predictability, we suggest patterns including clinical and radiographic features of apical periodontitis and technical quality of primary endodontic treatment

Vitamin D in Dentistry : a bibliometric review

Até o momento, nenhum estudo avaliou, área de Odontologia, a produção bibliográfica que avalia papel da vitamina D na manutenção da saúde oral, em alterações patológicas e nos resultados de tratamentos. Com isso, o objetivo do trabalho foi realizar uma revisão para investigar características bibliométricas da evidência científica disponível sobre o tema da “vitamina D na Odontologia”. Áreas como implantodontia, periodontia, cirurgia e traumatologia bucomaxilofacial, endodontia, ortodontia e cariologia foram consideradas. Nesse contexto, foram incluídos na revisão estudos pré-clínicos em animais experimentais, estudos clínicos observacionais e estudos clínicos de intervenção. Cinco bases de dados foram pesquisadas: Pubmed, Cochrane, Embase, Lilacs e Medline, com estudos sem restrição de data inicial e idioma, publicados até o mês de janeiro de 2023. Estudos in vitro não foram considerados. Um total de 1558 estudos foram recuperados, dos quais 151 alcançaram os critérios de elegibilidade. Foram realizadas análises quantitativa, de conteúdo e de redes de conexão de palavras.Until today, no study has measured, in the field of Dentistry, the bibliographic production that evaluates the role of vitamin D in maintaining oral health, in pathological alterations and in the results of treatments. The objective of this work was to carry out a review to investigate bibliometric characteristics of the scientific evidence available on the subject of “vitamin D in Dentistry”. Areas such as implant dentistry, periodontics, oral and maxillofacial surgery and traumatology, endodontics, orthodontics and cariology. were considered. In this context, preclinical studies in experimental animals, observational clinical studies and clinical intervention studies were included in the review. Five databases were searched: Pubmed, Cochrane, Embase, Lilacs and Medline, including studies without restriction of initial date and language, published until January 2023. In vitro studies were not considered. A total of 1558 studies were retrieved, of which 151 met the eligibility criteria. Quantitative, content and word connection networks analysis were performed