This study aimed at the assessment and monitoring of digital image quality parameters resulting f... more This study aimed at the assessment and monitoring of digital image quality parameters resulting from the use of portable X-ray equipment in clinical examinations. A multicentric study was conducted for quality assessment of images produced using the portable NOMAD® with the DIGORA® ™ Optime UV computed radiography (CR) system. The digital image quality was evaluated in terms of high- and low-contrast spatial resolution, contrast noise ratio (CNR), and signal-to-noise ratio (SNR). The samples comprised six biomaterials: zirconia (Zr), lyophilized bone (LB), photopolymerizable restorative resin (PRR), glass ionomer cement (GIC), GIC photopolymerizable (GICP), and double adhesive resin cement (DARC). The DICOM image (processed pixels) and raw data (without processing) were quantitatively analyzed. The qualitative visual analysis was performed in an adequately illuminated environment and then repeated in an environment equivalent to that of a clinical practice using conventional monitor...
The purpose of this study was to assess the distance between the mandibular canal and the base of... more The purpose of this study was to assess the distance between the mandibular canal and the base of the mandible in the mental foramen region, in order to determine sexual dimorphism in the Brazilian population. The assessment of this distance is also important to prevent injuries to the inferior alveolar neurovascular bundle and to avoid clinical complications during surgical procedures. Using the simplified Kalabalik and Aytuğarn method for studies in Forensic Dentistry or Anatomy, this study assessed 100 cone-beam computed tomography images of male and female patients. The distance between the inferior border of the mandibular canal and the base of the mandible in the mental foramen region was evaluated bilaterally. No significant statistical differences were found between the right and left sides of the mandible. However, statistically significant difference between the genders was found (p=0.038). The lower distance (D2) measure can be applied to determine sexual dimorphism in th...
Clinical and Laboratorial Research in Dentistry, 2021
3D printers manufacture objects used in various dental specialties. Objective: This literature re... more 3D printers manufacture objects used in various dental specialties. Objective: This literature review aims to explore different techniques of current 3D printers and their applications in printed materials for dental purposes. Methods: The online PubMed databases were searched aiming to find applications of different 3D printers in the dental area. The keywords searched were 3D printer, 3D printing, additive manufacturing, rapid prototyping, 3D prototyping, dental materials and dentistry. Results: From the search results, we describe Stereolithography (SLA), Digital Light Processing (DLP), Material Jetting (MJ), Fused Deposition Modeling (FDM), Binder Jetting (BJ) and Dust-based printing techniques. Conclusion: 3D printing enables different additive manufacturing techniques to be used in dentistry, providing better workflows and more satisfying clinical results.
Introdução: As células de Haller são descritas como células etmoidais aeradas, localizadas na mar... more Introdução: As células de Haller são descritas como células etmoidais aeradas, localizadas na margem inferior da órbita, próximas aos óstios dos seios maxilares. A tomografia computadorizada de feixe cônico (TCFC) tem amplo uso na odontologia, permitindo aquisição de imagens da região craniofacial. Objetivo: Identificar, em exames de TCFC, a relação da célula de Haller com as seguintes condições: sinusopatia, desvio de septo nasal ósseo, tratamento endodôntico e lesões periapicais. Materiais e métodos: Foram utilizados 99 exames de TCFC, sendo 51 incluídos nos critérios da pesquisa. As imagens foram analisadas no software Xelis Dental®, de maneira a identificar a presença ou não da célula de Haller, bem como sua relação com as condições citadas. Resultados: Dentre os 51 exames de TCFC avaliados, 35,3% apresentaram célula de Haller do lado direito e 23,5% no lado esquerdo. Levando-se em conta a relação das células de Haller com uma ou mais alterações aqui citadas, no lado direito a t...
A radiologia e ferramenta essencial no diagnostico bucal e tem apresentado evolucoes tecnologicas... more A radiologia e ferramenta essencial no diagnostico bucal e tem apresentado evolucoes tecnologicas que permitem o planejamento e tratamento em Odontologia. A tomografia computadorizada volumetrica de feixe conico (cone-beam computed tomography ou CBCT) apresenta vantagens relacionadas com a baixa dose de radiacao e alta definicao das lesoes maxilomandibulares.O cisto de Stafne ou defeito osseo lingual mandibular e mais frequente na regiao posterior, abaixo do canal mandibular e pode ser visualizado pela CBCT. Relatos dos casos: sao analisados dois casos clinico-radiograficos de pacientes com diagnostico de defeito osseo lingual mandibular. Caso 1 - individuo leucoderma, genero masculino, com 52 anos, apresenta imagem solitaria, na direcao do segundo molar inferior esquerdo com depressao da cortical lingual. Caso 2 - individuo xantoderma, genero masculino, 60 anos de idade, com imagens solitarias, localizadas no ramo da mandibula. Concluiu-se que a CBCT e de relevante importância para...
Purpose Little is known regarding the accuracy of clinical magnetic resonance imaging (MRI) proto... more Purpose Little is known regarding the accuracy of clinical magnetic resonance imaging (MRI) protocols with acceptable scan times in sinus graft assessment. The aim of this study was to evaluate the correlations between MRI and cone-beam computed tomographic (CBCT) measurements of maxillary sinus grafts using 2 different clinical MRI imaging protocols. Materials and Methods A total of 15 patients who underwent unilateral sinus lift surgery with biphasic calcium phosphate were included in this study. CBCT, T1-weighted MRI, and T2-weighted MRI scans were taken 6 months after sinus lift surgery. Linear measurements of the maximum height and buccolingual width in coronal images, as well as the maximum anteroposterior depth in sagittal images, were performed by 2 trained observers using CBCT and MRI Digital Imaging and Communication in Medicine files. Microcomputed tomography (micro-CT) was also performed to confirm the presence of bone tissue in the grafted area. Correlations between MRI...
This study aimed at the assessment and monitoring of digital image quality parameters resulting f... more This study aimed at the assessment and monitoring of digital image quality parameters resulting from the use of portable X-ray equipment in clinical examinations. A multicentric study was conducted for quality assessment of images produced using the portable NOMAD® with the DIGORA® ™ Optime UV computed radiography (CR) system. The digital image quality was evaluated in terms of high- and low-contrast spatial resolution, contrast noise ratio (CNR), and signal-to-noise ratio (SNR). The samples comprised six biomaterials: zirconia (Zr), lyophilized bone (LB), photopolymerizable restorative resin (PRR), glass ionomer cement (GIC), GIC photopolymerizable (GICP), and double adhesive resin cement (DARC). The DICOM image (processed pixels) and raw data (without processing) were quantitatively analyzed. The qualitative visual analysis was performed in an adequately illuminated environment and then repeated in an environment equivalent to that of a clinical practice using conventional monitor...
The purpose of this study was to assess the distance between the mandibular canal and the base of... more The purpose of this study was to assess the distance between the mandibular canal and the base of the mandible in the mental foramen region, in order to determine sexual dimorphism in the Brazilian population. The assessment of this distance is also important to prevent injuries to the inferior alveolar neurovascular bundle and to avoid clinical complications during surgical procedures. Using the simplified Kalabalik and Aytuğarn method for studies in Forensic Dentistry or Anatomy, this study assessed 100 cone-beam computed tomography images of male and female patients. The distance between the inferior border of the mandibular canal and the base of the mandible in the mental foramen region was evaluated bilaterally. No significant statistical differences were found between the right and left sides of the mandible. However, statistically significant difference between the genders was found (p=0.038). The lower distance (D2) measure can be applied to determine sexual dimorphism in th...
Clinical and Laboratorial Research in Dentistry, 2021
3D printers manufacture objects used in various dental specialties. Objective: This literature re... more 3D printers manufacture objects used in various dental specialties. Objective: This literature review aims to explore different techniques of current 3D printers and their applications in printed materials for dental purposes. Methods: The online PubMed databases were searched aiming to find applications of different 3D printers in the dental area. The keywords searched were 3D printer, 3D printing, additive manufacturing, rapid prototyping, 3D prototyping, dental materials and dentistry. Results: From the search results, we describe Stereolithography (SLA), Digital Light Processing (DLP), Material Jetting (MJ), Fused Deposition Modeling (FDM), Binder Jetting (BJ) and Dust-based printing techniques. Conclusion: 3D printing enables different additive manufacturing techniques to be used in dentistry, providing better workflows and more satisfying clinical results.
Introdução: As células de Haller são descritas como células etmoidais aeradas, localizadas na mar... more Introdução: As células de Haller são descritas como células etmoidais aeradas, localizadas na margem inferior da órbita, próximas aos óstios dos seios maxilares. A tomografia computadorizada de feixe cônico (TCFC) tem amplo uso na odontologia, permitindo aquisição de imagens da região craniofacial. Objetivo: Identificar, em exames de TCFC, a relação da célula de Haller com as seguintes condições: sinusopatia, desvio de septo nasal ósseo, tratamento endodôntico e lesões periapicais. Materiais e métodos: Foram utilizados 99 exames de TCFC, sendo 51 incluídos nos critérios da pesquisa. As imagens foram analisadas no software Xelis Dental®, de maneira a identificar a presença ou não da célula de Haller, bem como sua relação com as condições citadas. Resultados: Dentre os 51 exames de TCFC avaliados, 35,3% apresentaram célula de Haller do lado direito e 23,5% no lado esquerdo. Levando-se em conta a relação das células de Haller com uma ou mais alterações aqui citadas, no lado direito a t...
A radiologia e ferramenta essencial no diagnostico bucal e tem apresentado evolucoes tecnologicas... more A radiologia e ferramenta essencial no diagnostico bucal e tem apresentado evolucoes tecnologicas que permitem o planejamento e tratamento em Odontologia. A tomografia computadorizada volumetrica de feixe conico (cone-beam computed tomography ou CBCT) apresenta vantagens relacionadas com a baixa dose de radiacao e alta definicao das lesoes maxilomandibulares.O cisto de Stafne ou defeito osseo lingual mandibular e mais frequente na regiao posterior, abaixo do canal mandibular e pode ser visualizado pela CBCT. Relatos dos casos: sao analisados dois casos clinico-radiograficos de pacientes com diagnostico de defeito osseo lingual mandibular. Caso 1 - individuo leucoderma, genero masculino, com 52 anos, apresenta imagem solitaria, na direcao do segundo molar inferior esquerdo com depressao da cortical lingual. Caso 2 - individuo xantoderma, genero masculino, 60 anos de idade, com imagens solitarias, localizadas no ramo da mandibula. Concluiu-se que a CBCT e de relevante importância para...
Purpose Little is known regarding the accuracy of clinical magnetic resonance imaging (MRI) proto... more Purpose Little is known regarding the accuracy of clinical magnetic resonance imaging (MRI) protocols with acceptable scan times in sinus graft assessment. The aim of this study was to evaluate the correlations between MRI and cone-beam computed tomographic (CBCT) measurements of maxillary sinus grafts using 2 different clinical MRI imaging protocols. Materials and Methods A total of 15 patients who underwent unilateral sinus lift surgery with biphasic calcium phosphate were included in this study. CBCT, T1-weighted MRI, and T2-weighted MRI scans were taken 6 months after sinus lift surgery. Linear measurements of the maximum height and buccolingual width in coronal images, as well as the maximum anteroposterior depth in sagittal images, were performed by 2 trained observers using CBCT and MRI Digital Imaging and Communication in Medicine files. Microcomputed tomography (micro-CT) was also performed to confirm the presence of bone tissue in the grafted area. Correlations between MRI...
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