Carolina Carmo Menezes1, Guilherme Janson2, Camila da Silveira Massaro1, Lucas Cambiaghi3, Daniela Gamba Garib4. 1. a Orthodontic Graduate Student, Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, SP, Brazil. 2. b Professor, Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, SP, Brazil. 3. c Periodontic Graduate Student, Department of Prosthodontics, Bauru Dental School, University of São Paulo, Bauru, SP, Brazil. 4. d Associate Professor, Department of Orthodontics, Bauru Dental School, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, SP, Brazil.
Abstract
OBJECTIVE: To evaluate the precision, reproducibility, and accuracy of alveolar crest level measurements on CBCT images obtained with different voxel sizes. MATERIALS AND METHODS: CBCT exams were made of 12 dried human mandibles with voxel dimensions of 0.2, 0.3, and 0.4 mm. Bone crest level was measured directly on the mandibles with a digital caliper and on CBCT images. Images were measured twice by two examiners. Intra- and interexaminer precision and reproducibility were assessed using paired and t-tests, respectively. Accuracy was evaluated using t-tests. RESULTS: Precision and reproducibility of bone crest level tomographic measurements was good for all voxel sizes evaluated. The images with 0.2-mm voxel size showed a decreased number of intraexaminer errors. A high accuracy for measurements of bone crest level was observed for all CBCT definitions, except for the mandibular incisors using the 0.4-mm voxel size. CONCLUSIONS: Precision and reproducibility of alveolar bone level measurements were good for various voxel sizes. CBCT images demonstrated good accuracy for 0.2-mm and 0.3-mm voxel sizes. The mandibular incisor region needs better resolution than that provided by 0.4-mm voxel size for bone crest level measurements.
OBJECTIVE: To evaluate the precision, reproducibility, and accuracy of alveolar crest level measurements on CBCT images obtained with different voxel sizes. MATERIALS AND METHODS: CBCT exams were made of 12 dried human mandibles with voxel dimensions of 0.2, 0.3, and 0.4 mm. Bone crest level was measured directly on the mandibles with a digital caliper and on CBCT images. Images were measured twice by two examiners. Intra- and interexaminer precision and reproducibility were assessed using paired and t-tests, respectively. Accuracy was evaluated using t-tests. RESULTS: Precision and reproducibility of bone crest level tomographic measurements was good for all voxel sizes evaluated. The images with 0.2-mm voxel size showed a decreased number of intraexaminer errors. A high accuracy for measurements of bone crest level was observed for all CBCT definitions, except for the mandibular incisors using the 0.4-mm voxel size. CONCLUSIONS: Precision and reproducibility of alveolar bone level measurements were good for various voxel sizes. CBCT images demonstrated good accuracy for 0.2-mm and 0.3-mm voxel sizes. The mandibular incisor region needs better resolution than that provided by 0.4-mm voxel size for bone crest level measurements.
Authors: Diego Coelho Lorenzoni; Guilherme Janson; Juliana Cunha Bastos; Roberta Martinelli Carvalho; José Carlos Bastos; Rita de Cássia Moura Carvalho Lauris; José Fernando Castanha Henriques; Terumi Okada Ozawa Journal: Clin Oral Investig Date: 2016-03-15 Impact factor: 3.573
Authors: Joana Gomes Dos Santos; Ana Paula Oliveira Reis Durão; António Cabral de Campos Felino; Ricardo Manuel Casaleiro Lobo de Faria de Almeida Journal: J Oral Maxillofac Res Date: 2019-06-30