1
|
Nascimento EHL, Fontenele RC, Lopes PDA, Santaella GM, Vasconcelos KF, de Freitas DQ, Oenning AC, Groppo FC. Development of a model of soft tissue simulation using ballistic gelatin for CBCT acquisitions related to dentomaxillofacial radiology research. Dentomaxillofac Radiol 2020; 50:20200191. [PMID: 32941781 DOI: 10.1259/dmfr.20200191] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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.
Collapse
Affiliation(s)
- Eduarda Helena Leandro Nascimento
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil.,Department of Clinical and Preventive Dentistry, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
| | | | - Priscila de Azeredo Lopes
- Odontoclínica Central da Marinha, Serviço de radiologia e Imaginologia Odontológica, Brazilian Navy, Rio de Janeiro, RJ, Brazil
| | - Gustavo Machado Santaella
- Radiology and Imaging Sciences, Department of Diagnosis and Oral Health, University of Louisville, Lousville, KY, USA
| | - Karla Faria Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, University Hospitals Leuven, Leuven, Belgium
| | - Deborah Queiroz de Freitas
- Department of Oral Diagnosis, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil
| | - Anne Caroline Oenning
- Division of Oral Radiology, Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Campinas, Sao Paulo, Brazil
| | - Francisco Carlos Groppo
- Department of Physiological Sciences, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, SP, Brazil
| |
Collapse
|
2
|
da Costa ED, Verner FS, Peyneau PD, de Freitas DQ, de Almeida SM. Diagnosis of ethmoid sinolith by cone-beam computed tomography: case report and literature review. Oral Radiol 2017; 35:68-72. [PMID: 30484175 DOI: 10.1007/s11282-017-0310-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 11/28/2017] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The aim of this study was to report the first case of diagnosis of a rare ethmoid sinolith by cone-beam computed tomography (CBCT) and discuss the importance of carefully assessing the entire volume of the images regardless of the region of interest. CASE PRESENTATION A 22-year-old woman underwent CBCT examination to assess the upper permanent canine teeth. Analysis of the entire volume of CBCT revealed an oval-shaped hyperdense, homogeneous, expansive formation with defined boundaries located in the ethmoid bone. The differential diagnosis of a sinolith in the ethmoid sinus was confirmed after removal of the lesion by nasoendoscopy and histopathological examination. CONCLUSION The diagnosis of lesions in the ethmoid sinus is challenging because of the complex anatomy of this region. Considering the limitations of two-dimensional X-ray examination, CBCT examination has become an important imaging modality for the diagnosis of these calcifications. In addition, the ability of the dental surgeon to assess the entire volume of the CBCT images and the knowledge of imaging features of these calcifications allows for recognition of incidental findings, facilitating early diagnosis and appropriate treatment.
Collapse
Affiliation(s)
- Eliana Dantas da Costa
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Av Limeira, 901, Areião, Piracicaba, São Paulo, 13414-018, Brazil.
| | - Francielle Silvestre Verner
- Division of Oral Radiology, Department of Dentistry, Federal University of Juiz de Fora/Governador Valadares Advanced Campus, Av Doutor Raimundo Rezende, 330-Centro, Governador Valadares, Minas Gerais, 35012-140, Brazil
| | - Priscila Dias Peyneau
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Av Limeira, 901, Areião, Piracicaba, São Paulo, 13414-018, Brazil
| | - Deborah Queiroz de Freitas
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Av Limeira, 901, Areião, Piracicaba, São Paulo, 13414-018, Brazil
| | - Solange Maria de Almeida
- Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas, Av Limeira, 901, Areião, Piracicaba, São Paulo, 13414-018, Brazil
| |
Collapse
|
3
|
de Brito ACR, Nejaim Y, de Freitas DQ, de Oliveira Santos C. Panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal. Imaging Sci Dent 2016; 46:159-65. [PMID: 27672611 PMCID: PMC5035720 DOI: 10.5624/isd.2016.46.3.159] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 04/08/2016] [Accepted: 05/06/2016] [Indexed: 11/18/2022] Open
Abstract
Purpose The purpose of this study was to detect the anterior loop of the mental nerve and the mandibular incisive canal in panoramic radiographs (PAN) and cone-beam computed tomography (CBCT) images, as well as to determine the anterior/mesial extension of these structures in panoramic and cross-sectional reconstructions using PAN and CBCT images. Materials and Methods Images (both PAN and CBCT) from 90 patients were evaluated by 2 independent observers. Detection of the anterior loop and the incisive canal were compared between PAN and CBCT. The anterior/mesial extension of these structures was compared between PAN and both cross-sectional and panoramic CBCT reconstructions. Results In CBCT, the anterior loop and the incisive canal were observed in 7.7% and 24.4% of the hemimandibles, respectively. In PAN, the anterior loop and the incisive canal were detected in 15% and 5.5% of cases, respectively. PAN presented more difficulties in the visualization of structures. The anterior/mesial extensions ranged from 0.0 mm to 19.0 mm on CBCT. PAN underestimated the measurements by approximately 2.0 mm. Conclusion CBCT appears to be a more reliable imaging modality than PAN for preoperative workups of the anterior mandible. Individual variations in the anterior/mesial extensions of the anterior loop of the mental nerve and the mandibular incisive canal mean that is not prudent to rely on a general safe zone for implant placement or bone surgery in the interforaminal region.
Collapse
Affiliation(s)
- Ana Caroline Ramos de Brito
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Yuri Nejaim
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Deborah Queiroz de Freitas
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Christiano de Oliveira Santos
- Department of Stomatology, Public Oral Health and Forensic Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| |
Collapse
|
4
|
de Brito ACR, Nejaim Y, de Freitas DQ, de Oliveira Santos C. Erratum to: Panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal. Imaging Sci Dent 2016; 46:297. [PMID: 28035310 PMCID: PMC5192030 DOI: 10.5624/isd.2016.46.4.297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Ana Caroline Ramos de Brito
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Yuri Nejaim
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Deborah Queiroz de Freitas
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Christiano de Oliveira Santos
- Department of Stomatology, Public Oral Health and Forensic Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| |
Collapse
|
5
|
Moreira DD, Gribel BF, Torres GDR, Vasconcelos KDF, Freitas DQD, Ambrosano GMB. Reliability of measurements on virtual models obtained from scanning of impressions and conventional plaster models. Braz J Oral Sci 2014. [DOI: 10.1590/1677-3225v13n4a11] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
6
|
Vasconcelos T, Neves F, Queiroz de Freitas D, Campos P, Watanabe P. Influence of the Milliamperage Settings on Cone Beam Computed Tomography Imaging for Implant Planning. Int J Oral Maxillofac Implants 2014; 29:1364-8. [DOI: 10.11607/jomi.3524] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
7
|
de-Azevedo-Vaz SL, Oenning ACC, Felizardo MG, Haiter-Neto F, de Freitas DQ. Accuracy of the vertical tube shift method in identifying the relationship between the third molars and the mandibular canal. Clin Oral Investig 2014; 19:583-8. [DOI: 10.1007/s00784-014-1277-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 06/25/2014] [Indexed: 11/28/2022]
|
8
|
Neves FS, Rovaris K, Oliveira ML, Novaes PD, de Freitas DQ. Concrescence: assessment of case by periapical radiography, cone beam computed tomography and micro-computed tomography. N Y State Dent J 2014; 80:21-23. [PMID: 24933768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The aim of this article was to describe imaging aspects of concrescence analyzed by three imaging modalities. A second molar joined together with a third molar was imaged using digital periapical radiography, cone beam computed tomography (CBCT) and micro-computed tomography (Micro-CT). On periapical radiograph, the mesial root of the third molar is superimposed on the distal root of the second molar. On CBCT images, a large cementum union between bulbous roots was detected, confirming the diagnosis of concrescence. On micro-CT images, the cementum union appeared limited to the apical third of the roots. In conclusion, both computed tomography modalities allowed for the diagnosis of concrescence. However, only micro-CT provided the real extension of the cementum union.
Collapse
|
9
|
Silva IMDCC, Freitas DQD, Ambrosano GMB, Bóscolo FN, Almeida SM. Bone density: comparative evaluation of Hounsfield units in multislice and cone-beam computed tomography. Braz Oral Res 2013. [PMID: 23184166 DOI: 10.1590/s1806-83242012000600011] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to evaluate the validity of the bone density value of potential implant sites in HU obtained by a specific cone-beam computed tomography (CBCT) device. In this study, the HU values obtained using a MSCT scanner were used as the gold standard. Twenty mandibles (40 potential implant sites) were scanned using an MSCT scanner (Somatom Sensation 40) and a CBCT scanner (i-CAT). The MSCT images were evaluated using the Syngo CT Workplace software and the CBCT images, using the XoranCat software. The images were evaluated twice by three oral radiologists, at 60 day intervals. The trabecular bone density of the same area was evaluated on both images. Intraclass coefficients (ICC) were calculated to examine the agreement between the examiners and between the two periods of evaluation. The bone density and area of the ROI were compared by the Student t test and Bland-Altman analysis. ICCs were excellent. The mean HU value obtained using CBCT (418.06) was higher than that obtained using MSCT (313.13), with a statistically significant difference (p < 0.0001). In addition, Bland-Altman analysis showed that the HU measures were not equivalent. In conclusion, the bone density in HU with CBCT images obtained using the device studied proved unreliable, since it was higher than that obtained using MSCT.
Collapse
|
10
|
Freitas DQD, Ramos-Perez FMDM, Neves EG, Marques MR, Bóscolo FN, Almeida SMD. Radioprotective effect of sodium selenite on bone repair in the tibia of ovariectomized rats. Braz Dent J 2012; 23:723-8. [DOI: 10.1590/s0103-64402012000600017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 11/05/2012] [Indexed: 11/22/2022] Open
Abstract
This studyevaluated protection by selenium (Se) in the bone repair process in ovariectomized rats after irradiation. For such purpose, 80 ovariectomized female Wistar rats were randomly divided into 4 experimental groups: ovariectomized (Ov), Ov/Se, Ov/irradiated (Irr) and Ov/ Se/Irr. A bone defect was created on the tibia of all animals 40 days after ovariectomy. Two days after surgery, only the Ov/Se and Ov/Se/Irr rats received 0.8 mg Se/kg. Three days after surgery, only the Ov/Irr and Ov/Se/Irr rats received 10 Gy of x-rays on the lower limb region. The animals were euthanized at 7, 14, 21 and 28 days after surgery to assess the repair process, which was evaluated by analysis of trabecular bone number (Masson Trichrome) and birefringence analysis (Picrosirius). It was possible to observe a delay in the bone repair process in the ovariectomized/irradiated group and similarity between the ovariectomized, Ov/Se and Ov/Se/Irr groups. In conclusion, sodium selenite exerted a radioprotective effect in the bone repair of tibia of ovariectomized rats without toxicity.
Collapse
|
11
|
Vasconcelos Filho JO, Menezes AVD, Freitas DQD, Manzi FR, Bóscolo FN, de Almeida SM. Condylar and disk position and signs and symptoms of temporomandibular disorders in stress-free subjects. J Am Dent Assoc 2007; 138:1251-5; quiz 1268. [PMID: 17785392 DOI: 10.14219/jada.archive.2007.0351] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND The authors conducted a study in subjects who tested free of psychological stress to determine the position of the condyle and whether that position was related to signs and symptoms of temporomandibular disorders (TMDs). METHODS Forty subjects underwent psychological evaluation to ensure freedom from psychological stress. The authors evaluated tenderness of the masticatory muscles and temporomandibular joints (TMJs) by means of bimanual digital palpation, and they determined the positions of the condyle and disk by using magnetic resonance imaging. RESULTS A total of 23.75 percent of the condyles were displaced away from the centric position either anteriorly (3.75 percent) or posteriorly (20.00 percent). chi(2) analysis showed a relationship between the position of the condyle and displacement of the disk, as well as a relationship between the position of the condyle and tenderness of the TMJs. CONCLUSION Although these relationships proved significant, it cannot be assumed that displacement of the condyle away from the centric position is predictive of TMD. CLINICAL IMPLICATIONS Only two subjects were judged to have had TMJ internal derangement. Thus, the absence of psychological stress seems to have played a role in this finding.
Collapse
|
12
|
Freitas DQD, Montebello Filho A. Evaluation of two methods of tracings for implants in panoramic radiographs. J Appl Oral Sci 2004; 12:84-8. [DOI: 10.1590/s1678-77572004000100015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2003] [Accepted: 01/07/2004] [Indexed: 11/22/2022] Open
Abstract
In the last years, computer programs have appeared in order to help dental practitioners in implants planning. These programs aim to facilitate the acquisition of adequate measures in digitalized radiographs. The aims of this study were: to evaluate the intra-examiner agreement in the acquisition of measures using two methods (manual and computer program - Radioimp), comparing their performances. Three examiners analyzed twenty-one panoramic radiographs. They used the two methods in two occasions. In the manual method, the examiners made a tracing on a paper fixed to the images and measured nine regions with a caliper. The images were digitalized and showed in a computer screen to be analyzed in the computer program. The examiners acquired measures of the same regions by the manual method. Vertical measures of spheres in the images were acquired in order to discount the magnifying factor of the technique. Through statistics analysis (p=.05), it was possible to conclude that there were differences in intra-examiner agreement and the examiners had greater difficulty in reproducing the measures when they used the computer program; the measures acquired by the manual method were closer to the real ones.
Collapse
|
13
|
Scaf G, Freitas DQD, Loffredo LDCM. Diagnostic reproducibility of the elongated styloid process. J Appl Oral Sci 2003; 11:120-4. [DOI: 10.1590/s1678-77572003000200007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2002] [Accepted: 04/14/2003] [Indexed: 11/21/2022] Open
Abstract
The aim of this study was to estimate the reproducibility related to the presence and to the measurements of elongated styloid process (ESP), based on panoramic radiographs and the prevalence of ESP. Experimental design: one hundred sixty six panoramic radiographs were used, from edentulous patients from the Radiology Clinic files, at Araraquara Dental School, Unesp, during a four-year period. One hundred and twenty one were female and 45 were male. Two calibrated observers evaluated the radiographs. A caliper was used to measure, in mm, the ESP from the base of the temporal bone to the tip of the structure. The ESP was considered present when the measurements were 30mm or more. Kappa statistics (k ) and intra-class correlation coefficient (r ), were applied to estimate the reproducibility. The results showed that related to the presence of ESP, the interobserver agreement was k =0.85. Related to the measurements of ESP, the interobserver agreement was r =0.52. The prevalence of ESP was estimated in 12.6%. ESP distribution in females was similar to that for males. In conclusion, we found a greater level of agreement when observers evaluated the presence of ESP than when they did the measurement of ESP. The prevalence of ESP was 12.6%.
Collapse
|