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22대 대한민국 국회 국회정보길라잡이 국회의원검색
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Purpose: Physiological dentin sclerosis is a distinctive phenomenon observed in transverse sections of the tooth root as a tooth ages. Since this effect has only been visualized 2-dimensionally, this pilot proof-of-concept study aimed to propose a novel method to visualize and quantify physiological sclerotic dentin 3-dimensionally using density-based micro-computed tomography (CT)-generated gray values.

Materials and Methods: Forty single-rooted premolars of known chronological age from the Malay male population were scanned with a micro-CT scanner. The X-ray source was operated at 160 kV, 100 μA, and a voxel size of 48.8 μm. Three-dimensional volume datasets for each tooth were reconstructed, and volumetric analysis was performed on the root dentin region using the open-source software FIJI (ImageJ) (ver. 1.54k, National Institutes of Health, Bethesda, USA). Results: Micro-CT imaging enabled the selection, isolation, and quantification of high-density areas in the tooth root that correspond to physiological sclerotic dentin. The generated gray value profile also reflected the characteristic butterfly-shaped pattern seen in transverse root sections. A comparison of premolars from different age groups revealed that individuals aged 31-60 years exhibited a larger butterfly-shaped area, reflecting the increase in high-density sclerotic dentin, compared with younger premolars.

Conclusion: In this pilot proof-of-concept study, visualization and measurement of physiological sclerotic dentin were shown to be feasible using micro-CT. However, the method is highly dependent on the capability of the micro-CT scanner and the performance of the image-processing software. Further research is needed to improve image quality using advanced micro-CT scanning techniques.

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Artificial intelligence for detection and classification of furcation defects using radiographic imaging : a systematic review Georgios S. Chatzopoulos, Vasiliki P. Koidou, Lazaros Tsalikis, Eleftherios G. Kaklamanos p. 322-334
Noise-optimized cone-beam computed tomographic imaging of different post materials with multiple settings : a comparative analysis Solaleh Shahmirzadi, Dilek Helvacioglu-Yigit, Umut Seki, Maharaj Singh, Sarang Saadat, Husniye Demirturk p. 335-342
Deep learning-based method for estimating age from periapical radiographs of upper incisors in a Thai population Praewpannarai Khruasarn, Kasemsit Teeyapan, Sangsom Prapayasatok, Sakarat Nalampang p. 343-350
Efficacy of deep learning models and dental professionals in identifying dental implants Veena Benakatti, Ramesh P. Nayakar, Mallikarjun Anandhalli, Rohit C. Sukhasare p. 351-360
Evaluation and comparison of contrast-to-noise ratio generated by lithium disilicate and zirconia : a phantom study Ben Philip Sylvan Bartlett, Hassem Geha, Rujuta Katkar, Taraneh Maghsoodi-Zahedi, John Patrick Hanlon p. 361-368
Assessment of the type and length of separated endodontic instruments in root-filled mandibular molars : a comparative study using digital periapical radiographs and CBCT Diego Filipe Bezerra Silva, Viviane Costa Silva, Márcia Nóbrega Lopes, Luiz Eduardo Marinho-Vieira, Douglas Pereira de Sousa, Jussara da Silva Barbosa, Fabiana T. Almeida, Patrícia Meira Bento, Rocharles Cavalcante Fontenele, Daniela Pita de Melo p. 369-376
Radiomorphometric indices and bone findings on panoramic images of childhood cancer survivors Ana Maria Ipólito Barros, Ana Paula Veras Sobral, Luiz Pedro Mendes de Azevedo, Cleomar Donizeth Rodrigues, Híttalo Carlos Rodrigues de Almeida, Márcia Maria Fonseca da Silveira p. 377-384
Visualizing physiological sclerotic dentin via micro-computed tomography : a pilot study Muhammad Zaid Zainuddin, Noor Shafini Mohamad, Su Keng Tan, Nurul Ain Ramlan, Mohd Yusmiaidil Putera Mohd Yusof p. 385-391
Effects of exposure time and voxel size on measured alveolar bone thickness in cone-beam computed tomography : an ex vivo animal study using a pig model Graham Garvey, Werner Harumiti Shintaku, Wanda I. Claro, Anastasios Karydis, Chenhao Zhao, Ayman Al Dayeh p. 392-399
Identification of key measurement points for accurate surface radiation dose assessment in cephalometric radiography Muhammed Ilhan, Roman Menz, Carlalberta Verna, Michael M. Bornstein, Dorothea C. Dagassan-Berndt p. 400-408
Influence of increased slice thickness and sharpening filter application in the detection of bone graft loss around implants Débora Costa Ruiz, Matheus Barros-Costa, Michelle Chang, Henrique Mateus Alves Felizardo, Hugo Gaêta-Araujo, Deborah Queiroz Freitas p. 409-416
Comparison of the nasal complex in individuals with and without cleft lip and palate using cone-beam computed tomography Panchanok Kaiyasuan, Rajda Chaichit, Saowaluck Limmonthol, Pipop Sutthiprapaporn p. 417-431

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