Vol. 15 No. 1 (2025): International Dental Research

DOI: https://doi.org/10.5577/idr.2025.vol15.1

Published: 30.04.2025

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Original Article

The relationship between mandibular symphysis shape and lower incisor dentoalveolar compensation in Class I and Class III skeletal patterns: A CBCT study

Aim: The aim of this study was to examine the relationship between the lower incisor dentoalveolar compensation mechanism and the morphology of the mandibular symphysis in patients with Class I and Class III malocclusions, who have different vertical growth patterns, using cone-beam computed tomography (CBCT). Methodology: This retrospective study analyzed the CBCT scans of 60 patients, divided into four groups based on dental and skeletal characteristics: Class I normodivergent, Class I hyperdivergent, Class III normodivergent, and Class III hyperdivergent. Measurements focused on the midsagittal section of the right lower central incisor to assess the relationship between mandibular symphysis morphology and alveolar bone thickness. Results: There were no substantial differences observed in alveolar bone thickness or linear mandibular symphysis measures between the groups. However, significant differences were found in symphysis concavity, basal and dentoalveolar inclination, and Incisor Mandibular Plane Angle (IMPA) values ( p =0.036, p =0.001, p =0.003, and p =0.001, respectively). Further analysis revealed strong correlations between symphysial thickness, total symphysis height, dentoalveolar inclination, and convexity angle with mandibular symphysis-related alveolar bone thickness ( p <0.05). Conclusion: A positive correlation was observed between the dentoalveolar symphysis and alveolar bone thickness in all groups. In Class I patients, symphysis height was negatively correlated with alveolar bone thickness, whereas no correlation was found for symphysis thickness or inclination. In Class III patients, the symphysis shape provided some insight, but could not reliably estimate the alveolar bone thickness.

alveolar bone thickness, Class I malocclusion, Class III malocclusion, normodivergent, hyperdivergent, cone-beam computed tomography, mandibular symphysis, symphysis inclination

Ruşen Yetgin, Sabahattin Bor, Numan Dedeoğlu, Samet Özden
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1-9
Abstract Views: 1469 Download: 708 10.5577/intdentres.594
Evaluation of mental foramen localization in children by age and gender using cone-beam computed tomography

Aim: This retrospective study was carried out to obtain detailed data on mental foramen localization differences, which can guide dental practices such as endodontic treatments, surgical procedures, and dental anesthesia, preventing complications. Cone-beam computed tomography (CBCT) images of individuals aged 7–18 were analyzed according to gender and age. Methodology: The CBCT images of 120 individuals who met the research criteria were divided into six groups according to age, and 240 hemimandibles were measured. The gender distribution of the patients in each group was equal. Measurements were obtained using 3D volumetric images obtained via CBCT and the RadiAnt DICOM Viewer. When examining the differences between the groups, the Mann–Whitney U test was used for paired groups, and the Kruskal–Wallis H test and post hoc multiple comparison tests were used for groups of more than two. Results: Statistically significant differences in the parameters related to mental foramen localization were determined between the gender and age groups ( p <0.05). No statistically significant differences were found between the right and left sides of the individuals in all measurements ( p >0.05). Further, the mean values of the anatomical points were determined, which can be used to guide pediatric and general dentistry practices. Conclusion: In the present study, the mean values of the anatomical points measured were determined. Our study suggests that these values can be used as a guide in pediatric and general dentistry applications, such as local anesthesia, endodontic treatments, and surgical operations.

mental foramen, anatomical landmark, cone-beam computed tomography, RadiAnt DICOM viewer

Hatice Kübra Başkan, Emin Caner Tümen
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10-17
Abstract Views: 756 Download: 393 10.5577/intdentres.391
The application of ultrasonography to the masticatory system: A bibliometric analysis

Aim: This study aimed to summarize the current knowledge on ultrasound use in the masticatory system and establish a scientific foundation for future research. Methodology: A literature search of the Web of Science database was completed in August 2024, following preliminary scans and searches conducted before August 2, 2024, to refine the approach. A total of 205 studies were included in the meta-analysis. Bibliometric analysis and data visualization were performed using VOSviewer and the R package Bibliometrix (Biblioshiny). Results: The first study on this topic was published in 1991. The highest number of publications and citations occurred in 2023. Turkey was the top producer of articles, whereas Japan had the greatest impact. The Universidade Estadual de Campinas published the most papers, and the Academic Center for Dentistry, Amsterdam, was the most cited institution. Stavros Kiliaridis emerged as the most prolific author, and Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology (OOOO Journal) was the most productive journal. Conclusion: This study conducted a comprehensive bibliometric analysis and visualization of research on ultrasound use in the masticatory system using literature from the Web of Science Core Collection database covering 1991 to 2024. The current focal areas and future research avenues were identified. This research also clarified the historical foundations and prevailing trends in ultrasound application within this field, offering a nuanced perspective for scholars.

bibliometrics, masseter muscle, masticatory system, ultrasonography

İbrahim Tevfik Gülşen, Ruşen Erdem, Yavuz Selim Genç, Emine Gülşen
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18-29
Abstract Views: 1432 Download: 388 10.5577/intdentres.612
Psychosocial impact of COVID-19 among adolescent orthodontic patients: A multicenter cross-sectional study

Aim: The aim of this study was to assess the COVID-19 anxiety and fear levels of adolescent patients undergoing orthodontic treatment in terms of their demographic variables, treatment location, COVID-19 status, and various clinical conditions (hospitalization and psychological support), as well as to evaluate their associations with age and treatment duration. Methodology: A multicenter descriptive and cross-sectional study was conducted in four different private clinics and a public hospital during the pandemic. Descriptive data included information on demographics, orthodontic treatment, and COVID-19 status. Anxiety and fear were assessed using the COVID-19 Anxiety Scale (CAS) and Fear of COVID-19 Scale (FC-19S), respectively. The collected data was statistically analyzed with the Shapiro-Wilk, Student’s t, Mann-Whitney U, and Kruskal-Wallis (Dunn post hoc) tests ( p <0.05). Results: A total of 231 adolescent patients (133 female and 98 male) with a mean age of 15.06 ± 1.61 years were examined. Higher anxiety scores were observed in patients from high-income families. In addition, patients receiving orthodontic treatment in private clinics reported significantly higher anxiety scores ( p <0.05). Patients were more anxious and experienced fear when they had COVID-19-related symptoms or were exposed to COVID-19-positive patients ( p <0.05). A positive correlation was found between the CAS and FC-19S scores (r =0.425; p =0.001) and between the treatment duration and FC-19S scores (r = 0.252; p =0.025). Conclusion: In the presence of COVID-19-like pandemic disease, private clinicians should be aware of delayed appointments to reduce the anxiety level of their patients, taking into account their income level and exposure to infection.

adolescent, anxiety, COVID-19, fear, anxiety scale, fear scale

Eyüp Burak Küçük, Serpil Çokakoğlu, Mehmet Hanifi Kokaçya, Mehmet Karadağ
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30-37
Abstract Views: 901 Download: 284 10.5577/intdentres.575
Comparative evaluation of the effects of sodium ascorbate, alcohol, and calcium hydroxide on the bond strength of composite resin to dentin in non-vital teeth bleaching

Aim: The aim of this in vitro study was to investigate the effects of sodium ascorbate, alcohol, and calcium hydroxide as a buffering agent on composite resin-dentin bond strength of non-vital teeth bleaching. Methodology: For our study, we used 80 human upper central teeth. An endodontic access cavity was opened on the palatal surface of the teeth. The root portion of the teeth was removed 2-3 mm below the enamel-cementum junction. Sodium perborate was used for the nonvital bleaching of all teeth. Following bleaching, four experimental groups were created: sodium ascorbate, alcohol, calcium hydroxide, and a control group. 1x1 mm specimens were obtained using a precision cutting device in all four experimental groups restored with bond and composite resin. The specimens were then subjected to tension tests in a microtensile device, and the resulting data were compared in terms of composite resin-dentin bond strength. Results: The study data were analyzed using the Kruskal-Wallis H test due to non-normal distributions of variables to compare groups. If the Kruskal-Wallis test indicated significant differences, a post-hoc multiple-comparison test was used to identify which groups differed. The Shapiro-Wilk test was used to determine whether the variables followed a normal distribution, based on the number of units. A statistically significant difference in binding strength was found between the study groups ( p <0.05). Specifically, the binding strength value of the sodium ascorbate group was significantly higher than that of the calcium hydroxide and control groups ( p <0.05). However, no statistically significant difference was observed between the other groups. Conclusion: After non-vital bleaching, sodium ascorbate can be used to improve the bond strength between composite resin and dentin. Further studies are needed to support the effect of alcohol and calcium hydroxide applications on bond strength.

non-vital bleaching, bond strength, sodium perborate, sodium ascorbate, alcohol, calcium hydroxide

Beyhan Başkan, Özkan Adıgüzel
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38-44
Abstract Views: 1416 Download: 375 10.5577/intdentres.536

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Vol. 15 No. 1 (2025): International Dental Research

Full Issue

Original Article

The relationship between mandibular symphysis shape and lower incisor dentoalveolar compensation in Class I and Class III skeletal patterns: A CBCT study

Evaluation of mental foramen localization in children by age and gender using cone-beam computed tomography

The application of ultrasonography to the masticatory system: A bibliometric analysis

Psychosocial impact of COVID-19 among adolescent orthodontic patients: A multicenter cross-sectional study

Comparative evaluation of the effects of sodium ascorbate, alcohol, and calcium hydroxide on the bond strength of composite resin to dentin in non-vital teeth bleaching