Eduarda Helena Leandro Nascimento1,2, Rocharles Cavalcante Fontenele1, Priscila de Azeredo Lopes3, Gustavo Machado Santaella4, Karla Faria Vasconcelos5, Deborah Queiroz de Freitas1, Anne Caroline Oenning6, Francisco Carlos Groppo7. 1. Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil. 2. Department of Clinical and Preventive Dentistry, Federal University of Pernambuco (UFPE), Recife, PE, Brazil. 3. Odontoclínica Central da Marinha, Serviço de radiologia e Imaginologia Odontológica, Brazilian Navy, Rio de Janeiro, RJ, Brazil. 4. Radiology and Imaging Sciences, Department of Diagnosis and Oral Health, University of Louisville, Lousville, KY, USA. 5. OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, University Hospitals Leuven, Leuven, Belgium. 6. Division of Oral Radiology, Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Campinas, Sao Paulo, Brazil. 7. Department of Physiological Sciences, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil.
Abstract
OBJECTIVES: To present the ballistic gelatin as a new material capable of simulating the soft tissues in cone-beam CT (CBCT) images. METHODS: CBCT images of three piglet heads were acquired with their soft tissues intact (standard group). Subsequently, the piglet heads were fixed in a container using metallic pins and moulded with acrylic resin; the soft tissues were then removed and replaced by ballistic gelatin, with the same thickness of the original soft tissues. The images were evaluated by two oral radiologists, to check the adaptation on bone surfaces, thickness and density, penetration into large bone cavities and cancellous bone, and the presence of air bubbles using a 5-score scale. Additionally, an objective analysis was carried out by one oral radiologist. For each CBCT scan, three axial reconstructions were selected to represent the mandibular, occlusal, and maxillary levels. The mean and standard deviation (SD) of the grey values were calculated in four regions of interest determined on soft tissue areas and compared by two-way ANOVA. RESULTS: The ballistic gelatin showed subjective scores ranging from good to excellent for all parameters evaluated. There was no significant difference in the mean and SD values of the grey values between ballistic gelatin and the gold standard groups for all levels (p > 0.05). Higher SD values were observed in the occlusal level for both groups (p < 0.05). CONCLUSIONS: Ballistic gelatin has visual and objective similarity with the gold standard. Thus, the ballistic gelatin is a promising material capable of simulating soft tissues in CBCT images.
OBJECTIVES: To present the ballistic gelatin as a new material capable of simulating the soft tissues in cone-beam CT (CBCT) images. METHODS: CBCT images of three piglet heads were acquired with their soft tissues intact (standard group). Subsequently, the piglet heads were fixed in a container using metallic pins and moulded with acrylic resin; the soft tissues were then removed and replaced by ballistic gelatin, with the same thickness of the original soft tissues. The images were evaluated by two oral radiologists, to check the adaptation on bone surfaces, thickness and density, penetration into large bone cavities and cancellous bone, and the presence of air bubbles using a 5-score scale. Additionally, an objective analysis was carried out by one oral radiologist. For each CBCT scan, three axial reconstructions were selected to represent the mandibular, occlusal, and maxillary levels. The mean and standard deviation (SD) of the grey values were calculated in four regions of interest determined on soft tissue areas and compared by two-way ANOVA. RESULTS: The ballistic gelatin showed subjective scores ranging from good to excellent for all parameters evaluated. There was no significant difference in the mean and SD values of the grey values between ballistic gelatin and the gold standard groups for all levels (p > 0.05). Higher SD values were observed in the occlusal level for both groups (p < 0.05). CONCLUSIONS: Ballistic gelatin has visual and objective similarity with the gold standard. Thus, the ballistic gelatin is a promising material capable of simulating soft tissues in CBCT images.
Authors: Michael Doctor; Patrick Olivieri; Sebastian D Siadecki; Gabriel Rose; Aaran Drake; Turandot Saul Journal: Am J Emerg Med Date: 2016-10-08 Impact factor: 2.469
Authors: Anne Caroline Oenning; Benjamin Salmon; Karla de Faria Vasconcelos; Laura Ferreira Pinheiro Nicolielo; Ivo Lambrichts; Gerard Sanderink; Ruben Pauwels; Reinhilde Jacobs Journal: Dentomaxillofac Radiol Date: 2018-01-10 Impact factor: 2.419
Authors: R Pauwels; L Seynaeve; J C G Henriques; C de Oliveira-Santos; P C Souza; F H Westphalen; I R F Rubira-Bullen; R F Ribeiro-Rotta; M I B Rockenbach; F Haiter-Neto; P Pittayapat; H Bosmans; R Bogaerts; R Jacobs Journal: Dentomaxillofac Radiol Date: 2015-06-19 Impact factor: 2.419
Authors: Priscila A Lopes; Gustavo M Santaella; Carlos Augusto S Lima; Karla de Faria Vasconcelos; Francisco C Groppo Journal: Dentomaxillofac Radiol Date: 2018-07-20 Impact factor: 2.419