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Sessiz R, Ercan I, Özkan G, Toluk Ö. Evaluation of sex dimorphism of the mandible with geometric morphometric analysis: conventional and reconstructed panoramic radiography study. Surg Radiol Anat 2023; 45:1497-1504. [PMID: 37460704 DOI: 10.1007/s00276-023-03201-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 06/29/2023] [Indexed: 10/20/2023]
Abstract
PURPOSE The purpose of the study was to investigate the mandible shape dimorphism between males and females both on conventional panoramic radiographs (cPR) and reconstructed panoramic radiographs obtained from cone beam computed tomography (rPR) with geometric morphometric method. METHODS Panoramic radiographs and cone beam computed tomography scans were performed on 33 males and 35 females with median age 23.0 (13.0-57.0) years old. The mandibular shape comparisons between genders were examined with Procrustes analysis, mandible shape classification analysis was made with principal component analysis and shape deformations were concluded from thin plate spline (TPS) analysis. RESULTS Age had no statistically significant difference between gender (p = 0.580). For the shape of mandible on cPR and rPR, there were statistically significant differences between males and females (p = 0.002, p = 0.032, respectively). The shape variabilities of mandible on cPR for females were 0.054 and for males 0.053. The shape variabilities of mandible on rPR for females were 0.051 and for males 0.049. Both on cPR and rPR, the shape variability of the females' mandible was similar within their group, the shape variability of the males' mandible was similar within their group. In the examination of mandibular dimorphism in cPR, maximal deformations were seen in the region between the mandibular notch, posterior ramus, anterior ramus, gonion, in both sides, in TPS graphs. On the other hand, a high level of deformations was observed in all landmarks that define the mandibular shape on rPR. CONCLUSIONS The mandible dimorphism can be detected in the examination performed with geometric morphometric methods on cPR and rPR. While mandible shape differences according to gender are seen most in the ramus region in cPR, differences can be detected in all landmarks in rRP.
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Affiliation(s)
- Rüya Sessiz
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Çanakkale Onsekiz Mart University, Çanakkale, Türkiye.
| | - Ilker Ercan
- Department of Biostatistics, Faculty of Medicine, Bursa Uludağ University, Bursa, Türkiye
| | - Gökhan Özkan
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Aydın Adnan Menderes University, Aydın, Türkiye
| | - Özlem Toluk
- Department of Biostatistics, Faculty of Medicine, Bursa Uludağ University, Bursa, Türkiye
- Department of Biostatistics and Medical Informatics, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Türkiye
- Department of Biostatistics, Institute of Health Sciences, Bursa Uludağ University, Bursa, Türkiye
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Yakoup D, Rodosthenous E, Giannakopoulos K. Taurodontism in simultaneous existence with multiple supernumerary teeth: A case report. SAGE Open Med Case Rep 2023; 11:2050313X231169854. [PMID: 37151740 PMCID: PMC10161329 DOI: 10.1177/2050313x231169854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 03/29/2023] [Indexed: 05/09/2023] Open
Abstract
Supernumerary teeth and taurodontism are both common dental anomalies when found as isolated entities. However, simultaneous presence in the same individual without a syndrome is rarely reported in the literature. This case report describes a 20-year-old non-syndromic male with multiple supernumerary teeth in association with multiple molar and premolar taurodonts and no family history of genetic predisposing factors. Taurodontism was measured and confirmed through cone-beam computed tomography for accuracy of the classification. Early diagnosis with the aid of radiographic imaging and persistent follow-up are crucial to treatment.
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Affiliation(s)
- Dena Yakoup
- School of Dentistry, European University Cyprus, Nicosia, Cyprus
| | | | - Kostis Giannakopoulos
- Department of Operative Dentistry, School of Dentistry, European University Cyprus, Nicosia, Cyprus
- Kostis Giannakopoulos, School of Dentistry, European University Cyprus, 6 Diogenous street, Nicosia 2404, Cyprus.
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Chen H, Liu L, Han M, Gu Y, Wang W, Sun L, Pan Y, Li H, Wang Z, Sun W, Zhang WB, Wang H. Changes of maxillary central incisor and alveolar bone in Class II Division 2 nonextraction treatment with a fixed appliance or clear aligner: A pilot cone-beam computed tomography study. Am J Orthod Dentofacial Orthop 2022; 163:509-519. [PMID: 37079283 DOI: 10.1016/j.ajodo.2022.02.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 02/01/2022] [Accepted: 02/01/2022] [Indexed: 11/20/2022]
Abstract
INTRODUCTION This retrospective clinical study investigated the clinical changes of maxillary central incisor and alveolar bone in Class II Division 2 nonextraction treatment with fixed appliances or clear aligners on the basis of cone-beam computed tomography. METHODS Fifty-nine Chinese Han patients with similar demographic characteristics were collected from a conventional bracket group, a self-ligating bracket group, and a clear aligner group. All measurements about root resorption and alveolar bone thickness on the cone-beam computed tomography images were tested. Changes between pretreatment and posttreatment were evaluated by paired-sample t test. The variation among the 3 groups was compared by 1-way analysis of variance. RESULTS The resistance center of the maxillary central incisor showed upward or forward movement, and the axial inclination was increased in 3 groups (P <0.0001). Root volume loss in the clear aligner group (23.68 ± 4.82 mm3) was significantly less than that in the fixed appliances group (28.24 ± 6.44 mm3 in the conventional bracket group, 28.17 ± 6.07 mm3 in the self-ligating bracket group) (P <0.05). All 3 groups showed a significant decrease in palatal alveolar bone and total bone thickness at all 3 levels at posttreatment. In contrast, labial bone thickness significantly increased except for crestal level l. Among the 3 groups, the clear aligner group had a prominent increase in labial bone thickness at the apical level (P = 0.0235). CONCLUSIONS Clear aligner treatment for Class II Division 2 malocclusions could effectively reduce the incidence of fenestration and root resorption. Our findings will be beneficial to comprehensively understand the effectiveness of different appliances for Class II Division 2 malocclusions treatment.
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Affiliation(s)
- Hongyu Chen
- Department of Orthodontics, the Affiliated Stomatological Hospital of Nanjing Medical University; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Luwei Liu
- Department of Orthodontics, the Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Minxuan Han
- Department of Orthodontics, the Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Yan Gu
- Department of Orthodontics, the Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Wei Wang
- Department of Orthodontics, the Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Lian Sun
- Department of Orthodontics, the Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Yongchu Pan
- Department of Orthodontics, the Affiliated Stomatological Hospital of Nanjing Medical University; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Hu Li
- Department of Orthodontics, the Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Zhendong Wang
- Department of Orthodontics, the Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Wen Sun
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Wei-Bing Zhang
- Department of Orthodontics, the Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China; Department of Stomatology, Dushu Lake Hospital Affiliated to Soochow University; Department of Stomatology, Medical Center of Soochow University, Soochow, China.
| | - Hua Wang
- Department of Orthodontics, the Affiliated Stomatological Hospital of Nanjing Medical University; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China.
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Abaid S, Zafar S, Kruger E, Tennant M. Size estimation of unerupted canines and premolars using various independent variables: a systematic review. J Orofac Orthop 2022; 84:164-177. [PMID: 35420320 DOI: 10.1007/s00056-022-00392-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 02/24/2022] [Indexed: 10/18/2022]
Abstract
INTRODUCTION Prediction of unerupted permanent teeth is an essential part of orthodontic diagnosis and treatment planning. This prediction is done by mixed dentition space analysis based on the estimation of mesiodistal dimensions of unerupted permanent canine and premolars from already erupted permanent teeth. Permanent mandibular incisors are most commonly used for prediction. Recent literature reveals that mandibular incisors are not accurate predictors and other independent variables have been introduced to make a more accurate and precise prediction. The objective of this paper was to evaluate the literature in light of a variety of independent variables and their predictive accuracy. METHODS Electronic databases such as MEDLINE, PubMed, Scopus, Embase, Web of Science, CINAHL Plus were searched to identify articles published until September 2021. RESULTS The search resulted in a total of 1098 articles, of which 24 papers met our inclusion criteria and were included in this review. Articles using permanent mandibular incisors only as a predictor were excluded during the eligibility assessment. The results show that various independent variables including mesiodistal and vestibulo-oral dimensions of permanent maxillary and mandibular incisors and molars, molar basal arch length, intermolar distance, maxillary and mandibular arch and gender have been used as predictors to more accurately determine mesiodistal width of unerupted canine and premolars in different populations. CONCLUSION Ethnic tooth size variations strongly emphasize the need to determine which independent variable gives a more accurate prediction of unerupted permanent teeth to develop a population-specific prediction model. This will play a significant role in managing space problems and developing malocclusions.
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Affiliation(s)
- S Abaid
- School of Human Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, 6009, Perth, WA, Australia.
| | - S Zafar
- School of Dentistry, The University of Queensland, Herston, Australia
| | - E Kruger
- School of Human Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, 6009, Perth, WA, Australia
| | - M Tennant
- School of Human Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, 6009, Perth, WA, Australia
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Skeletal and Dental Morphological Characteristics of the Maxillary in Patients with Impacted Canines Using Cone Beam Computed Tomography: A Retrospective Clinical Study. J Pers Med 2022; 12:jpm12010096. [PMID: 35055411 PMCID: PMC8778207 DOI: 10.3390/jpm12010096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 12/29/2021] [Accepted: 01/10/2022] [Indexed: 12/10/2022] Open
Abstract
The aim of this study is to analyze the skeletal and dentoalveolar morphological characteristics of the maxillary in subjects with a unilateral palatally impacted canine using Cone Beam Computed Tomography (CBCT). A retrospective clinical study was conducted of 100 adult patients divided into two groups: one consisting of patients with a unilaterally palatally impacted maxillary canine (GI), with the subgroups in the right and left hemiarches (GI-R and GI-L), and the second, without impacted canine, as the control group (CG). The CBCT measured skeletal variables (maxillary basal width and alveolar crest height) and dentoalveolar variables (inclination of the upper incisor, tooth lengths of incisors and canines, arch length, tooth size and bone dental discrepancy). In skeletal variables, statistically significant differences were found in alveolar crest height (ACH) in all groups and subgroups (p < 0.01). In the dentoalveolar variables, there were differences in the angle of the upper incisor (II) and lateral incisor length (LLIL) between the GI and GC and the angle of the upper incisor (II′), arch length (AL′) and arch length-tooth size discrepancy (ATD′) among the GI subgroups (p < 0.01). There are skeletal and dentoalveolar differences in patients with unilateral palatally impacted maxillary canines, with lower angular and linear measurements compared with patients without impaction.
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Safari Z, Ghazizadeh Ahsaie M, safi Y. Assessment of Inferior Alveolar Nerve position at the region of First and Second Mandibular Molars in dentate and edentulous sites using Cone Beam Computed Tomography- A cross. J Long Term Eff Med Implants 2022; 32:15-20. [DOI: 10.1615/jlongtermeffmedimplants.2022039842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Harini K, Sarfaraz H, Shetty M, Shetty S, Amreen S, Prabhu R. Evaluation of the accuracy of measurements made at probable implant site using cone-beam computed tomography: A retrospective in vivo study. JOURNAL OF INDIAN ACADEMY OF ORAL MEDICINE AND RADIOLOGY 2022. [DOI: 10.4103/jiaomr.jiaomr_346_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Chong SY, Aung LM, Pan YH, Chang WJ, Tsai CY. Equation for Tooth Size Prediction from Mixed Dentition Analysis for Taiwanese Population: A Pilot Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18126356. [PMID: 34208241 PMCID: PMC8296182 DOI: 10.3390/ijerph18126356] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/04/2021] [Accepted: 06/08/2021] [Indexed: 11/23/2022]
Abstract
Background: In mixed dentition analysis, estimation of the mesiodistal width of unerupted permanent canines and premolars is essential for successful diagnosis and treatment planning. The present study aimed to develop a simple linear equation to predict permanent tooth sizes from mixed dentition analysis for Taiwanese people. Methods: The sample comprised 200 dental casts, derived from Taiwanese patients (100 males and 100 females; age, 12–35 years). Mesial distal tooth widths were measured in dental casts with a digital caliper. A student’s t-test was conducted to detect tooth size correlations with gender-specific differences, as well as intra-arch counterparts. Standard linear regression was conducted to develop a simple equation representing predictions of canine-premolar relationships. Results: All teeth were not significantly different between the left and right sides, regardless of gender and upper or lower arches. In terms of types of teeth, males had larger tooth dimensions in both arches than females. New regression equations for estimating the dimensions of the unerupted canines and premolars in the Taiwanese population were developed. Conclusions: Using a sample of Taiwanese people, new models derived for females and males separately were developed, which should provide highly accurate predictions for unerupted canines and premolars in the Taiwanese population.
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Affiliation(s)
- See Yen Chong
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (S.Y.C.); (L.M.A.); (Y.-H.P.)
| | - Lwin Moe Aung
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (S.Y.C.); (L.M.A.); (Y.-H.P.)
| | - Yu-Hwa Pan
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (S.Y.C.); (L.M.A.); (Y.-H.P.)
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei 110, Taiwan
- Graduate Institute of Dental & Craniofacial Science, Chang Gung University, Taoyuan 333, Taiwan
- School of Dentistry, College of Medicine, China Medical University, Taichung 4060, Taiwan
| | - Wei-Jen Chang
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (S.Y.C.); (L.M.A.); (Y.-H.P.)
- Dental Department, Shuang-Ho Hospital, Taipei Medical University, New Taipei City 235, Taiwan
- Correspondence: (W.-J.C.); (C.-Y.T.)
| | - Chi-Yang Tsai
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan; (S.Y.C.); (L.M.A.); (Y.-H.P.)
- Dental Department, Taipei Medical University Hospital, Taipei 110, Taiwan
- Correspondence: (W.-J.C.); (C.-Y.T.)
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SARUHAN N, TEKİN G. Evaluation in terms of Angle and Length of the Coronoid Process and Condyle in Adolescents and Adults. KOCAELI ÜNIVERSITESI SAĞLIK BILIMLERI DERGISI 2020. [DOI: 10.30934/kusbed.664526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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10
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Almeida VDSM, Bomfim RT, Sobreira ACR, Barbosa IDS, Leite-Ribeiro PM, Rubira-Bullen IR, Sarmento VA. Linear measurement accuracy of CBCT panoramic reconstructions: experimental study with dry human mandibles. Oral Radiol 2020; 37:421-426. [PMID: 32936399 DOI: 10.1007/s11282-020-00477-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 07/27/2020] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Studies on software accuracy of reformatted panoramic computed tomography (CT) images are scarce. OBJECTIVES The aim of this study was to evaluate the software accuracy of reformatted panoramic views from cone-beam computed tomography (CBCT). METHODS Ten dry mandibles were scanned using CBCT with different voxel sizes. Following the reconstruction of panoramic views with three different software, horizontal and vertical linear measurements were performed using the electronic rules of each software. Measurements of the corresponding dry mandibles were taken with a digital caliper and defined as the gold standard. RESULTS There were no statistically significant differences in linear distances among the dry mandibles and reformatted panoramic CT views. The relative error ranged from 1.3 to 8.0%, depending on the software and voxel size. CONCLUSIONS The linear measurements on reformatted panoramic views are reliable.
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Affiliation(s)
| | - Rodrigo Tavares Bomfim
- Dentistry School, Federal University of Bahia, Avenida Araújo Pinho, n. 62-Canela, Salvador, Bahia, 40110-040, Brazil
| | - Ana Cristina Rosário Sobreira
- Dentistry School, Federal University of Bahia, Avenida Araújo Pinho, n. 62-Canela, Salvador, Bahia, 40110-040, Brazil
| | - Inessa da Silva Barbosa
- Dentistry School, Federal University of Bahia, Avenida Araújo Pinho, n. 62-Canela, Salvador, Bahia, 40110-040, Brazil
| | | | - Izabel Regina Rubira-Bullen
- Bauru Dentistry School, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75, Jardim Brasil, Bauru, São Paulo, 17012-901, Brazil
| | - Viviane Almeida Sarmento
- Dentistry School, Federal University of Bahia, Avenida Araújo Pinho, n. 62-Canela, Salvador, Bahia, 40110-040, Brazil
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Van Dyck J, Begnoni G, Willems G, Laenen A, Thevissen P, Verdonck A, Cadenas de Llano-Pérula M. Dental development in patients with and without unilateral cleft lip and palate (UCLP): a case control study. Clin Oral Investig 2020; 25:2619-2631. [PMID: 32914272 DOI: 10.1007/s00784-020-03573-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 09/03/2020] [Indexed: 01/04/2023]
Abstract
OBJECTIVE To evaluate if the presence of unilateral cleft lip and palate (UCLP) causes delay in dental age and tooth development. MATERIALS AND METHODS Panoramic radiographs of 189 non-syndromic UCLP patients, aged from 6 to 20 years, were collected. Two measures of tooth development were examined: dental maturity scale for the seven left mandibular teeth (dental age-DA) and the degree of each tooth development (developmental score-DS). All the teeth except third molars were staged according to the Demirjian's method. The data of the cleft group were compared with a control group matched for age and gender, based on the findings observed in other 189 panoramic radiographs. RESULTS At all ages, DA was lower in the UCLP group, but not always significantly; the highest difference was - 1.411 for females at 13 years old and - 0.776 for males at 12 years old. DS of all teeth was significantly lower in the UCLP group, at all ages under 17 in females, and at all ages under 18 in males. In UCLP group, tooth development was more delayed in the maxilla compared with the mandible. No evidence of a slower development at the cleft side compared with the non-cleft side was highlighted. CONCLUSIONS Significant lower dental development was observed in UCLP patients compared with control ones by using DS and DA indexes. CLINICAL RELEVANCE These findings can help the clinicians in establishing a proper orthodontic and surgical diagnosis and treatment planning in UCLP patients and for forensic age estimation's purposes.
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Affiliation(s)
- Julie Van Dyck
- Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Giacomo Begnoni
- Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Guy Willems
- Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Annouschka Laenen
- Interuniversity Institute for Biostatistics and statistical Bioinformatics, KU Leuven and University Hasselt, Kapucijnenvoer 35, 3000, Leuven, Belgium
| | - Patrick Thevissen
- Department of Imaging and Pathology, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Anna Verdonck
- Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium
| | - Maria Cadenas de Llano-Pérula
- Department of Oral Health Sciences-Orthodontics, KU Leuven and Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, 3000, Leuven, Belgium.
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Lee BA, Kim B, Kim YT. Supraeruption as a consideration for implant restoration. J Periodontal Implant Sci 2020; 50:260-267. [PMID: 32643329 PMCID: PMC7443384 DOI: 10.5051/jpis.2000140007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 05/13/2020] [Accepted: 06/05/2020] [Indexed: 11/21/2022] Open
Abstract
Purpose The aim of this study was to compare the prevalence, amount, and rate of supraeruption of the maxillary second molar according to sex, age, and history of periodontitis. Methods Data were collected retrospectively from the charts and panoramic radiographs of 65 patients who were scheduled to undergo implant placement at the site of the mandibular second molar. The amount of supraeruption of the maxillary second molar and the alveolar bone level of the neighboring teeth were measured on digital panoramic radiographs. The prevalence was evaluated in each group, and univariate and multivariate logistic regression analyses were used to identify factors influencing the prevalence of supraeruption. The amount and the rate of supraeruption were compared between pairs of groups using the Mann-Whitney U test. For all tests, P values <0.05 were considered to indicate statistical significance. Results Supraeruption occurred in 78% of the patients. The prevalence of supraeruption was affected by sex, age, and history of periodontitis. The mean amount of supraeruption was 0.91 mm and the mean rate of supraeruption was 0.14 mm/month. The amount and the rate of supraeruption showed no significant differences according to sex, age, or the distance from the cementoenamel junction to the alveolar bone crest (P>0.05). Conclusions These results show that the amount of supraeruption on the maxillary second molar was similar to the thickness of the enamel on the occlusal surface. When a single implant is scheduled to be placed on the mandibular second molar, supraeruption of the antagonist should be considered.
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Affiliation(s)
- Bo Ah Lee
- Department of Periodontology, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Byoungheon Kim
- Department of Periodontology, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Young Taek Kim
- Department of Periodontology, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
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Wei D, Zhang L, Li W, Jia Y. Quantitative Comparison of Cephalogram and Cone-Beam Computed Tomography in the Evaluation of Alveolar Bone Thickness of Maxillary Incisors. Turk J Orthod 2020; 33:85-91. [PMID: 32637188 DOI: 10.5152/turkjorthod.2020.19097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 01/05/2020] [Indexed: 11/22/2022]
Abstract
Objective This study aims to quantitatively compare cephalogram and cone-beam computed tomography (CBCT) when evaluating maxillary central incisor alveolar bone thickness. Methods We used 30 sets of lateral cephalograms and CBCT images that were recorded at the same time. Labial, buccal, and overall alveolar bone thicknesses were measured on three measurement lines of the forward-most incisor in lateral cephalograms and four maxillary incisors in CBCT images. Paired t-test, interclass correlation coefficient analysis, one-way analysis of variance (ANOVA), and Bland-Altman analysis were used to assess cephalometrically measured alveolar bone thickness of maxillary incisors and compare these measurements with those made using CBCT images. Results Significant differences were observed between cephalometric and CBCT-based measurements of maxillary incisor alveolar bone thickness; most values showed mild or moderate correlation between the two methods. In most cases, cephalometric measurements were greater than CBCT-based measurements. Bland-Altman plots and ANOVA revealed that measurement bias increased when measurement lines moved apically. Alveolar bone thickness was always overestimated on cephalograms. Conclusion Maxillary incisor alveolar bone thickness is always overestimated on cephalograms compared with CBCT-based measurements, with the overestimations ranging from 0.3 to 1.3 mm. Cephalometric measurement bias increases when measurement lines move apically. Thus, CBCT should be recommended when the accurate evaluation of alveolar bone thickness is warranted.
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Affiliation(s)
- Diyang Wei
- Department of Orthodontics, Peking University School of Stomatology, Peking, China
| | - Lingyun Zhang
- Department of Orthodontics, Peking University School of Stomatology, Peking, China
| | - Weiran Li
- Department of Orthodontics, Peking University School of Stomatology, Peking, China
| | - Yilin Jia
- Department of Orthodontics, Peking University School of Stomatology, Peking, China
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2D vs. 3D Radiological Methods for Dental Age Determination around 18 Years: A Systematic Review. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10093094] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The age of a living human being can be determined by applying a number of different methods; the most diffused are skeletal and dental methods, both principally based on X-rays examinations. This systematic review assesses the current evidence regarding the accuracy and reliability of Cone Beam Computed Tomography (CBCT) vs. Orthopantomography (OPG) in age determination. A computerized systematic literature search of studies published up to January 2020 was conducted without language restrictions in order to identify articles comparing CBCT vs. OPG in dental anatomy evaluation, articles evaluating the accuracy of dental methods for age estimation, both with CT and OPG exams, and articles comparing CBCT vs. OPG in terms of radiation dose. CBCT was found to be more accurate compared to OPG in dental anatomy evaluation. When analyzing young adults, an estimation error of two years is considered forensically acceptable. The radiation dose of a CBCT exam is higher compared to an OPG exam. However, the difference is not as marked with small Fields Of View (FOV) and low-resolution protocols. Final conclusion was that a small FOV CBCT centered on the mandibular angle of a young patient is an accurate and safe method for dental age estimation around the age of 18.
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Maddalone M, Citterio C, Pellegatta A, Gagliani M, Karanxha L, Del Fabbro M. Cone-beam computed tomography accuracy in pulp chamber size evaluation: An ex vivo study. AUST ENDOD J 2019; 46:88-93. [PMID: 31617650 DOI: 10.1111/aej.12378] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2019] [Indexed: 12/29/2022]
Abstract
This study aimed to assess ex vivo the accuracy of cone-beam computed tomography (CBCT), as compared to operative microscope, for evaluating pulp chamber size. A total of forty teeth were extracted for periodontal reasons and a horizontal section was done at the most apical level of the cement-enamel junction. The pulp chamber was photographed using a digital camera connected to an optical microscope. Then, the tooth was scanned with CBCT and the horizontal slide matching the anatomical section of pulp chamber was digitally stored. The pulp chamber section area was measured through image analysis software. The two methods provided similar results, either for monoradicular (P = 0.14) or multiradicular teeth (P = 0.93). Correlation was statistically significant (P < 0.0001), being the coefficient r = 0.89 and 0.94 for monoradicular and multiradicular teeth, respectively. Conclusively, CBCT is suitable for pulp chamber morphology evaluation. However, it has limitations in detecting the anatomical variability of small branches in root canal system.
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Affiliation(s)
- Marcello Maddalone
- Department of Translational Medicine and Surgery, University of Milano-Bicocca, Milan, Italy
| | - Claudio Citterio
- Department of Translational Medicine and Surgery, University of Milano-Bicocca, Milan, Italy
| | - Alberto Pellegatta
- Department of Translational Medicine and Surgery, University of Milano-Bicocca, Milan, Italy
| | - Massimo Gagliani
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milan, Italy
| | - Lorena Karanxha
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milan, Italy
| | - Massimo Del Fabbro
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milan, Italy.,Dental Clinic, IRCCS Orthopedic Institute Galeazzi, Milan, Italy
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Kalabalik F, Aytuğar E. Localization of the Mandibular Canal in a Turkish Population: a Retrospective Cone-Beam Computed Tomography Study. EJOURNAL OF ORAL MAXILLOFACIAL RESEARCH 2019; 10:e2. [PMID: 31404191 PMCID: PMC6683388 DOI: 10.5037/jomr.2019.10202] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 06/26/2019] [Indexed: 11/26/2022]
Abstract
Objectives The aim of this study was to determine the location of the mandibular canal at the mental foramen region that is essential in order to prevent injuries to the inferior alveolar neurovascular bundle during mandibular surgical procedures. Material and Methods The position of the mandibular canal was analysed using cone-beam computed tomography images from 300 Turkish patients, who were referred to Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Izmir Katip Celebi University for various complaints. The distances of the mandibular canal to the outer superior (D1), inferior (D2), buccal (D3), and lingual (D4) cortical margins were measured at 2 mm distal to the mental foramen. Results There were 148 (49.3%) males and 152 (50.7%) females with ages ranging from 15 to 74 years (39.15 [SD 17.8]). D1 was significantly greater than D2 and D3 was significantly greater than D4 on both left and right sides. While the mean D1, D2, and D4 in males were significantly greater than in females on both left and right sides. There was no significant difference between D3 in males and females on both left and right sides. Conclusions The results showed that the mandibular canal was vertically located nearer to the inferior cortical border and horizontally nearer to the lingual cortical border of the mandible at the mental foramen region. Knowledge of the distances of mandibular canal to the outer cortical margins at this region of the mandible will be helpful for surgical procedures.
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Affiliation(s)
- Fahrettin Kalabalik
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Izmir Katip Celebi University, IzmirTurkey
| | - Emre Aytuğar
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Izmir Katip Celebi University, IzmirTurkey
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Hermann L, Wenzel A, Schropp L, Matzen LH. Marginal bone loss and resorption of second molars related to maxillary third molars in panoramic images compared with CBCT. Dentomaxillofac Radiol 2019; 48:20180313. [PMID: 30652501 DOI: 10.1259/dmfr.20180313] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVES Compare findings among observers in panoramic images (PAN) and cone beam CT (CBCT); and assess findings in PAN as indicators for marginal bone loss and resorption observed in CBCT. METHODS 120 impacted maxillary third molars with PAN and CBCT were included. Four observers assessed morphological features: (1) tooth angulation; (2) number of roots; (3) bony impaction (yes/no) and pathology; (4) marginal bone level at the second molar (normal/>3 mm = bone loss); (5) resorption in the second molar (no/superficial/< half way through the dentin/≥ half way through the dentin/involving the pulp); (6) size of follicular space (normal/> 4 mm(cyst)). Percentage accordance and κ statistics described observer variation in PAN and CBCT. Logistic regression analyses tested findings in PAN as indicators for marginal bone loss or resorption observed in CBCT. RESULTS κ values were fair and interobserver accordance was marginally higher in CBCT than PAN. Agreement between PAN and CBCT was 81-88% for marginal bone loss and 68-81% for resorption. Severe resorption was more often observed in CBCT. Mesio-angulated third molars and marginal bone loss interpreted in PAN significantly indicated marginal bone loss observed in CBCT (odds ration 17-34; p < 0.012; 8.8-52.8; p < 0.02). In contrast, findings in PAN were not significant indicators for resorption observed in CBCT (p > 0.05). CONCLUSION In general, there was a fair agreement for marginal bone loss between PAN and CBCT, and PAN could significantly predict bone loss observed in CBCT. However, presence of resorption observed in CBCT could not be determined from PAN, and more severe resorption was observed in CBCT. CBCT is indicated if resorption in the second molar needs to be assessed.
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Affiliation(s)
- Louise Hermann
- 1 Department of Dentistry and Oral Health, Section of Oral Radiology, Aarhus University , Denmark , Europe
| | - Ann Wenzel
- 1 Department of Dentistry and Oral Health, Section of Oral Radiology, Aarhus University , Denmark , Europe
| | - Lars Schropp
- 1 Department of Dentistry and Oral Health, Section of Oral Radiology, Aarhus University , Denmark , Europe
| | - Louise Hauge Matzen
- 1 Department of Dentistry and Oral Health, Section of Oral Radiology, Aarhus University , Denmark , Europe
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Dastoori M, Bouserhal JP, Halazonetis DJ, Athanasiou AE. Anterior teeth root inclination prediction derived from digital models: A comparative study of plaster study casts and CBCT images. J Clin Exp Dent 2018; 10:e1069-e1074. [PMID: 30607223 PMCID: PMC6311401 DOI: 10.4317/jced.55180] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 10/03/2018] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND To assess the accuracy of digital models generated using commercially available software to predict anterior teeth root inclination characteristics and compare the results to relevant data obtained from CBCT images. MATERIAL AND METHODS Following sample size calculation and after application of inclusion and exclusion criteria, pre-treatment maxillary and mandibular plaster models and the corresponding CBCT scans of 31 patients attending a private orthodontic clinic were selected. The subjects were 10 males and 21 females with age range 12 to 40 years. Plaster models were scanned using the high resolution mode of an Ortho Insight 3D scanner and CBCT scans were taken using a Kodak 9500 Cone Beam 3D System machine. The teeth on the digital scans were segmented and virtual roots were predicted and constructed by the Ortho Insight 3D software. The long axes of the predicted roots and the actual roots, as segmented from the CBCT images, were computed using best-fit lines. The inter-axis angle was used to assess error in root inclination prediction by the software. Mann-Whitney and Kruskal-Wallis tests were used. Intra-examiner error was evaluated using the Bland-Altman method. RESULTS The maximum disparity in angle between images derived from digital models and CBCT data was almost 40 degrees (upper left canine). The upper and lower canines produced the worst results, followed by the lower lateral incisors. The upper central incisors showed the best results, although the maximum angle of difference exceeded 20 degrees (with the median around 8 degrees). CONCLUSIONS Root morphology imaging prediction is not a primary function of this software and this study confirmed its limitation as a sole tool in routine clinical applications. At present these predictions cannot be considered accurate or reliable unless correlated clinically with a radiographic image. Key words:Digital models, CBCT, tooth root inclination prediction software.
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Affiliation(s)
- Mahmoud Dastoori
- Former resident, Department of Orthodontics, Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, UAE; Orthodontic Specialist, London Dental Clinic, Dubai, UAE
| | - Joseph P Bouserhal
- Professor, Department of Orthodontics, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon
| | - Demetrios J Halazonetis
- Professor and Chairman, Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Athanasios E Athanasiou
- Dean and Professor of Orthodontics, Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, UAE
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Naseri M, Ali Mozayeni M, Safi Y, Heidarnia M, Akbarzadeh Baghban A, Norouzi N. Root Canal Morphology of Maxillary Second Molars according to Age and Gender in a Selected Iranian Population: A Cone-Beam Computed Tomography Evaluation. IRANIAN ENDODONTIC JOURNAL 2018; 13:373-380. [PMID: 30083209 PMCID: PMC6064032 DOI: 10.22037/iej.v13i3.19278] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Introduction This study sought to assess root canal morphology of maxillary second molars regarding age and gender in an Iranian population using cone-beam computed tomography (CBCT). Methods and Materials Totally, 157 maxillary second molars of patients presenting to a radiology clinic were evaluated on CBCT scans. Tooth length, number of roots, root fusion, coronal and sagittal root deviation, number of canals per root, prevalence of second mesiobuccal canal, root canal morphology according to the Vertucci's classification and the correlation of these variables with age and gender were evaluated. Data were analyzed using the Mann Whitney U, Kruskal Wallis and Fisher's exact tests. Results Of 157 teeth, 98 belonged to females and 59 to males. The mean tooth length was significantly greater in males than in females (P=0.002) and it was shorter in 50-60 years old group. The rate of root fusion was 18.6%. Distobuccal and palatal roots were mainly straight in both sagittal and coronal planes while mesiobuccal roots mostly had a distal-buccal deviation; 67.5% of the teeth had four canals. Number of canals was significantly correlated with gender and was higher in males (P<0.05). The most prevalent canal type was type VI in second mesiobuccal, and type V in palatal and distobuccal canals. The most common types in mesiobuccal canal were types I, VI and II, respectively. In the remaining two roots, type I was the most common. Conclusion Root and canal morphology of the maxillary second molars in Iranian population showed features different from those in other populations.
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Affiliation(s)
- Mandana Naseri
- Department of Endodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Ali Mozayeni
- Department of Endodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Yaser Safi
- Department of Oral and Maxillafacial Radioligy, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Alireza Akbarzadeh Baghban
- Physiotherapy Research Center, Rehabilitation School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Negar Norouzi
- Department of Endodontics, Dental School, Mazandaran University of Medical Sciences, Sari, Iran
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Fortes JH, de Oliveira-Santos C, Matsumoto W, da Motta RJG, Tirapelli C. Influence of 2D vs 3D imaging and professional experience on dental implant treatment planning. Clin Oral Investig 2018; 23:929-936. [PMID: 29907931 DOI: 10.1007/s00784-018-2511-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 06/04/2018] [Indexed: 01/06/2023]
Abstract
OBJECTIVES This study investigated whether professional experience and type of image examination (panoramic radiography (PAN) or cone beam computed tomography (CBCT)) could influence the pre-surgical planning for dental implant treatment. MATERIALS AND METHODS Six dentists, from two different levels of experience (senior (Sr) and junior (Jr)) performed simulated pre-surgical planning by using PANs and after 1 month, by using CBCTs, considering implant length (IL), implant width (IW), need for bone graft (BG), and other surgical procedures (OP). Bland-Altman test and Kappa coefficient were used to identify agreements. RESULTS Bland-Altman test showed good agreement in the plans for inter-professional (i.e., Sr vs Jr) comparisons. Bland-Altman plots displayed intra-observer agreement (i.e., differences between PAN and CBCT), showing discrepancy between imaging modalities for IL and a tendency towards selecting larger dental implant options when using PAN and smaller options with CBCT. Kappa showed almost perfect (0.81-1.0) agreement between Jr and Sr for OP (PAN and CBCT). For BG, agreement was substantial (0.61-0.80) when planning was done with PAN and CBCT. Descriptive statistics showed evidence that when Jrs used CBCT, they no longer indicated the BG they had planned when they used PAN. CONCLUSION There were differences in the pre-surgical planning for treatment with dental implants depending on the professional experience and the type of imaging examination used. CLINICAL RELEVANCE Variation in dental implant planning can affect treatment time, cost, and morbidity in patients.
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Affiliation(s)
- João Henrique Fortes
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, 14040-904, Brazil
| | - Christiano de Oliveira-Santos
- Departament of Stomatology, Public Health, and Forensic Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, 14040-904, Brazil
| | - Wilson Matsumoto
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, 14040-904, Brazil
| | - Raphael Jurca Gonçalves da Motta
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, 14040-904, Brazil
| | - Camila Tirapelli
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, 14040-904, Brazil.
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Hikita Y, Yamaguchi T, Tomita D, Adel M, Nakawaki T, Katayama K, Maki K, Kimura R. Relationship between tooth length and three-dimensional mandibular morphology. Angle Orthod 2018; 88:403-409. [PMID: 29664333 DOI: 10.2319/103017-734.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To clarify the relationship between tooth length and three-dimensional mandibular morphology in a healthy Japanese population. MATERIALS AND METHODS This study included 181 Japanese adults: 66 men and 115 women. Cone-beam computed tomography (CBCT) images were acquired with a dentofacial cone-beam x-ray CT scanner. Tooth length was measured with open-source OsiriX medical image processing software. Crown height and root length were measured in the maxillary and mandibular central incisors, lateral incisors, canines, first premolars, second premolars, first molars, and second molars. Based on these measurements, principal component (PC) analysis was performed. The following measurements were used to assess three-dimensional mandibular morphology: CD-GO, GO-GN, RCD-LCD, RGO-LGO, RCP-LCP, and the gonial angle. Stepwise multiple regression analysis was performed to examine the associations between three-dimensional mandibular morphology and the patterns of crown and root lengths using the mandibular measurements as explanatory variables and each PC as the dependent variable. RESULTS CD-GO was positively associated with PC1, which represented overall tooth length. RGO-LGO was positively associated with PC2, whereas GO-GN, RCP-LCP, and gonial angle were negatively associated with PC2, which was the axis denoting relatively longer root (+) vs higher crown (-). Being female was associated with PC3, which was the axis denoting relatively longer posterior tooth (+) vs anterior tooth (-). CONCLUSIONS The present clinical study effectively used CBCT images and PC analysis to reveal significant correlations between tooth length and mandibular morphology in a modern human population, confirming in part the statement that "large teeth necessitate large jaws."
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Pico CLVR, do Vale FJF, Caramelo FJSFA, Corte-Real A, Pereira SMA. Comparative analysis of impacted upper canines: Panoramic radiograph Vs Cone Beam Computed Tomography. J Clin Exp Dent 2017; 9:e1176-e1182. [PMID: 29167705 PMCID: PMC5694144 DOI: 10.4317/jced.53652] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Accepted: 06/28/2017] [Indexed: 11/20/2022] Open
Abstract
Background The use of CBCT exam in the study of IMC is not new. However, it’s still not known in what specific aspects CBCT exam shows a better result than then conventional exams. The aim of this study was to compare and conclude in what way the opinion regarding upper canine impaction differed when observing a panoramic image compared to the observation of a set of CBCT reconstructions. Material and Methods Twenty patients (10 males and 10 females) with a total of 28 impacted maxillary canines were identified from the database of the Department of Dentistry, Faculty of Medicine, University of Coimbra. For each canine, two different images were available: a panoramic image and a set of CBCT reconstructions. After a random distribution of both groups images, nine orthodontists completed a questionnaire where they were asked to evaluate ten different questions regarding canine impaction. Statistic analysis was performed using Cronbach’s alpha statistics, Kappa statistics and McNemar test, considering p<0,05 statistically significant. Results This study showed differences between the two images regarding tooth position. A statistical significant poor agreement was found between the two methods for the mesio-distal position of the apex (k=0,388, p<0,001) and for the labio-palatal tip cusp position (k=0,035, p=0,114). The adjacent root resorption showed a poor and very poor agreement between the two methods. Every other items were scored with an agreement between modalities ranging from moderate to strong. Conclusions The analyses of panoramic images versus CBCT images reconstructions provided different information regarding tooth position (especially concerning the mesio-distal apex position and the labio-palatal cusp position) but also in the assessment of root resorption. Further investigation should be done to determine in what cases CBCT exam has a clear advantage over conventional 2D exams, justifying its use. Key words:Cone-Beam Computed Tomography, Orthodontics, Impacted Tooth, Root resorption.
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Affiliation(s)
| | | | | | - Ana Corte-Real
- MS, DDS, PhD, Department of Forensic Dentistery, Dentistry Area, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Sónia-Margarida-Alves Pereira
- MS, DDS, PhD, Department of Orthodontics, Dentistry Area, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Tadinada A, Marczak A, Yadav S, Mukherjee PM. Applications of Cone Beam Computed Tomography in Orthodontics: A Review. Turk J Orthod 2016; 29:73-79. [PMID: 30112478 DOI: 10.5152/turkjorthod.2016.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 04/22/2016] [Indexed: 11/22/2022]
Abstract
Cone Beam Computed Tomography (CBCT) is being extensively used in orthodontics for diagnostic and treatment planning, especially in complex clinical conditions. The objective of this study was to review the English language literature for current applications and trends of CBCT in orthodontic diagnosis and treatment. Several electronic databases were searched with the primary words: "orthodontics and radiography" and "cone beam computed tomography" or "CBCT." Abstracts that appeared to fulfill our inclusion criteria were selected, and the complete articles were obtained. Twenty-eight abstracts initially met our search criteria, and 12 were selected for the review. Ten articles were later added to the list after hand searching the references. It was concluded that there is a need for prospective randomized clinical trials to evaluate the risk/benefit ratio of CBCT, such as higher cost, greater risk for radiation dose (compared to digital panoramic and cephalograms) versus superior diagnosis and treatment outcomes.
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Affiliation(s)
- Aditya Tadinada
- Division of Oral and Maxillofacial Radiology, University of Connecticut, School of Dental Medicine Farmington, Connecticut, USA
| | - Alana Marczak
- School of Dental Medicine, University of Connecticut, Farmington, Conn, USA
| | - Sumit Yadav
- Division of Orthodontics, University of Connecticut, School of Dental Medicine Farmington, Connecticut, USA
| | - Padma M Mukherjee
- Division of Orthodontics, Rutgers School of Dental Medicine, Newark, NJ, USA
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Luo T, Shi C, Zhao X, Zhao Y, Xu J. Automatic Synthesis of Panoramic Radiographs from Dental Cone Beam Computed Tomography Data. PLoS One 2016; 11:e0156976. [PMID: 27300554 PMCID: PMC4907432 DOI: 10.1371/journal.pone.0156976] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 05/23/2016] [Indexed: 11/19/2022] Open
Abstract
In this paper, we propose an automatic method of synthesizing panoramic radiographs from dental cone beam computed tomography (CBCT) data for directly observing the whole dentition without the superimposition of other structures. This method consists of three major steps. First, the dental arch curve is generated from the maximum intensity projection (MIP) of 3D CBCT data. Then, based on this curve, the long axial curves of the upper and lower teeth are extracted to create a 3D panoramic curved surface describing the whole dentition. Finally, the panoramic radiograph is synthesized by developing this 3D surface. Both open-bite shaped and closed-bite shaped dental CBCT datasets were applied in this study, and the resulting images were analyzed to evaluate the effectiveness of this method. With the proposed method, a single-slice panoramic radiograph can clearly and completely show the whole dentition without the blur and superimposition of other dental structures. Moreover, thickened panoramic radiographs can also be synthesized with increased slice thickness to show more features, such as the mandibular nerve canal. One feature of the proposed method is that it is automatically performed without human intervention. Another feature of the proposed method is that it requires thinner panoramic radiographs to show the whole dentition than those produced by other existing methods, which contributes to the clarity of the anatomical structures, including the enamel, dentine and pulp. In addition, this method can rapidly process common dental CBCT data. The speed and image quality of this method make it an attractive option for observing the whole dentition in a clinical setting.
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Affiliation(s)
- Ting Luo
- School of Mathematical Sciences, Capital Normal University, Beijing, China
- Beijing Higher Institution Engineering Research Center of Testing and Imaging, Beijing, China
| | - Changrong Shi
- School of Mathematical Sciences, Capital Normal University, Beijing, China
- Beijing Higher Institution Engineering Research Center of Testing and Imaging, Beijing, China
| | - Xing Zhao
- School of Mathematical Sciences, Capital Normal University, Beijing, China
- Beijing Higher Institution Engineering Research Center of Testing and Imaging, Beijing, China
- * E-mail:
| | - Yunsong Zhao
- School of Mathematical Sciences, Capital Normal University, Beijing, China
- Beijing Higher Institution Engineering Research Center of Testing and Imaging, Beijing, China
| | - Jinqiu Xu
- School of Mathematical Sciences, Capital Normal University, Beijing, China
- Beijing Higher Institution Engineering Research Center of Testing and Imaging, Beijing, China
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