Cleonice da Silveira Teixeira

This study evaluated the effects of different radiotherapy (RT) doses on the bond strength (BS) and adhesive interface of three root canal sealers to irradiated root dentin. Forty human maxillary canines were distributed (n=10) into three irradiated groups (54, 60, and 70 Gy) and one non-irradiated control. Roots were sectioned into slices. From each group, 35 slices were used for the micropush-out test and 5 for scanning electron microscopy (SEM). Three standardized cavities were prepared per slice. After final irrigation, cavities were filled with BioRoot RCS, Endomethasone N, or AH Plus Jet. After 7 days, the micropush-out test was performed. Failure modes were analyzed under a stereomicroscope, and the adhesive interface was assessed by SEM. Data were analyzed using two-way ANOVA and Tukey’s test (α=0.05). BS of BioRoot RCS and AH Plus Jet was significantly affected by RT (p<0.001). BioRoot RCS showed reduced BS in all irradiated groups compared to the control. Endomethasone N showed the lowest BS, regardless of RT (p<0.001). AH Plus Jet exhibited higher BS at 70 Gy compared to the control and 60 Gy, and similar performance to the control at 54 Gy. It also showed better adaptation and deeper tag penetration in all groups. Sealer cohesive failures predominated which showed more voids and cracks. SEM analysis revealed increased microcracks, dentin fissures, and interfacial gaps after irradiation. Radiotherapy affected the bond strength of BioRoot RCS and AH Plus Jet and compromised the adhesive interface. AH Plus Jet showed more favorable bonding behavior under irradiated conditions.

Background: Advances in reciprocating kinematics have improved the safety and efficiency of mechanical root canal preparation in Endodontics. Despite the growth of scientific publications in recent decades, a bibliometric analysis addressing research structure, temporal evolution, and the global landscape is still lacking. Aim: To conduct a bibliometric analysis of the scientific literature on reciprocating kinematics in Endodontics, focusing on publication trends, research themes, and global scientific contributions. Methodology: The Web of Science Core Collection (WoS‐CC) was searched in April 2026 without restrictions on publication year, language, or citation count. Extracted data included publication year, journal, impact factor, study design, research topic, country, institution, authorship, and keywords. Bibliometric mapping and network visualisation were performed using VOSviewer. Citation patterns and citation density, co‐authorship networks, and keyword co‐occurrence were analysed. Associations between citation count, publication year, and journal impact factor were assessed using Spearman's rank‐order correlation. Results: A total of 852 articles published between 2008 and 2026 were included, with the most cited article receiving 348 citations. The article with the highest citation density accumulated 21.11 citations per year since publication. Journal of Endodontics was the most productive journal ( n = 215). Laboratory‐based studies accounted for approximately 86% of the publications. The most frequently investigated topics were shaping ability and canal transportation ( n = 140). Silva EJNL was the most prolific author ( n = 46). Brazil ranked first in national scientific output ( n = 231), while Asia was the most productive continent overall ( n = 376). Spearman's analysis showed significant correlations, with citation counts strongly decreasing with publication year ( ρ = −0.811), moderately increasing with impact factor ( ρ = 0.551), and impact factor slightly decreasing over time ( ρ = −0.315). Conclusions: Reciprocating instrumentation continues to represent an active area of research in Endodontics. The available literature is predominantly experimental, with a strong emphasis on instrument performance and procedural safety, whereas clinically oriented investigations remain comparatively limited. Although scientific output is concentrated within specific countries and research groups, this bibliometric analysis highlights sustained research interest in reciprocating NiTi systems and underscores the need for broader international collaboration and well‐designed clinical studies to strengthen the clinical evidence base.

This study evaluated the accuracy of digital panoramic radiography, digital periapical radiography, and cone-beam computed tomography (CBCT) in diagnosing apical root resorption (ARR) using 85 extracted teeth from dry human skulls and mandibles. Four ARR levels were simulated: mild, moderate, severe, and extreme. CBCT scans, panoramic radiographs, and periapical radiographs were obtained before and after ARR simulation. Three examiners independently evaluated all images to determine ARR and, when present, to classify its severity level. Inter- and intra-observer agreement was calculated using Cohen's kappa, and sensitivity, specificity, and accuracy were determined for each method. Receiver operating characteristic (ROC) curve analysis was performed to obtain the area under the curve (AUC). AUCs were compared using the DeLong test. All imaging methods showed substantial inter- and intra-examiner agreement (κ > 0.60). CBCT demonstrated the highest sensitivity, specificity, and accuracy, followed by periapical and panoramic radiography. CBCT was significantly superior (p < 0.01) in detecting mild (AUC = 0.939) and moderate (AUC = 0.947) ARR compared with the other methods (AUC < 0.877). For severe ARR, CBCT (AUC = 0.953) and periapical radiography (AUC = 0.921) performed similarly (p > 0.05) and were superior (p=0.03) to panoramic radiography (AUC = 0.874). For extreme ARR, no significant difference was observed among the methods. In conclusion, CBCT showed high accuracy in detecting ARR, particularly at milder levels (< 2 mm). Periapical radiography was comparable to CBCT for severe resorption (one-third of the root), while all methods performed similarly for extreme resorption (half of the root). Thus, CBCT appears most suitable for early ARR detection, whereas periapical and panoramic radiography are adequate for diagnosing advanced stages.

Objective: To map and analyze scientific research on pain in endodontics through bibliometric and altmetric analysis. Material and Methods: An electronic search was conducted in the Web of Science database in August 2024. Two researchers selected studies and extracted key data, including authors, year, study design, journal, institution, country/continent, research topic, keywords, and citation count/density. Bibliometric graphical networks were generated using VOSviewer software, and altmetric analysis was performed using Dimensions. Results: A total of 706 studies published between 1963 and 2024 were analyzed. The most-cited article received 442 citations. Most studies were published in 2021 (n=90). The USA contributed the most studies (n=162). Al Reader was identified as the most prolific author (n=30). Clinical trials were the most common study design (n=464), with a predominance of investigations related to the use of systemic medications for pain control (n=122). Graphical network analysis revealed substantial collaboration among authors, while Dimensions highlighted notable interest in this topic on social media platforms, particularly Mendeley and X. Conclusion: The findings highlight a strong research focus on pain in endodontics, primarily on investigating systemic medications for pain control. However, studies addressing specific topics, such as pain in regenerative endodontic procedures, remain scarce. Clinical trials, which offer higher levels of evidence, currently have the greatest influence in this field.

The present study aimed to compare the performance of a 3D-endodontic guide (EG) and a conventional technique on the access of root canals containing fiberglass posts. Thirty single-canal lower human premolars were endodontically treated, filled using the single-cone technique, and prepared for fiberglass post luting. The teeth were positioned in the alveoli of human mandibles and cone beam computed tomography (CBCT) examination was performed. The specimens were randomly distributed (n = 10) according to the root canal access technique: control group (G_C)—no access; conventional access group (G_CA)—root canal accessed with spherical diamond burs and ultrasonic inserts; and EG group (G_EG)—root canal accessed with bone graft/anchorage drills and EG. At the end of the root canal access, new CBCT examination was performed to assess the root canal walls’ thickness and the volume of dental tissue removed during the fiberglass post removal. The time required for the access was also recorded. The data were submitted to statistical analysis (Kruskal–Wallis and Mann–Whitney tests, α = 0.05). G_CA promoted greater deviation than the G_EG (p < 0.05) and resulted in greater removal of the root canal walls. The volume of dental tissue/fiberglass post removed, deviations promoted, and the time spent were significantly lower (p < 0.05 and p < 0.001, respectively) in G_EG than in G_CA. The use of the EG provided a lower volume of dental tissue removed, less deviation from the original root canal path, and less time for endodontic access when compared to conventional access technique.