Orthodontic Waves最新文献

{"title":"Treatment of concomitant geminated and fused maxillary central incisors: A 5-year follow-up","authors":"Taiana Oliveira Baldo ,&nbsp;Daniella Prado Ferreira ,&nbsp;André Ferreira ,&nbsp;Gladys Cristina Dominguez","doi":"10.1016/j.odw.2019.10.001","DOIUrl":"10.1016/j.odw.2019.10.001","url":null,"abstract":"<div><p><span>Dental anomalies of form, such as gemination and fusion, are conditions rarely observed in the permanent dentition. </span>Multiple anomalies<span><span> of form are seldom found in one patient. This report describes the rare case of a 9-year-old boy with two dental anomalies, a geminated maxillary right central incisor and a fused maxillary left central incisor. The </span>treatment<span><span> plan included extraction of the geminated central incisor, and endodontic treatment and surgical separation of the fused central incisor. The correction of the smile was obtained by </span>orthodontic movement of the mesial half of the fused tooth through the midpalatal suture and subsequent aesthetic and prosthetic rehabilitation procedures. A multidisciplinary approach was essential for the proper planning of complex cases to achieve the best result.</span></span></p></div>","PeriodicalId":43169,"journal":{"name":"Orthodontic Waves","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.odw.2019.10.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48152642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relationship between pre-treatment orthodontic case complexities and their treatment outcomes","authors":"K. Tantipanichkul,&nbsp;Supatchai Boonpratham,&nbsp;Nathaphon Tangjit,&nbsp;Suwannee Luppanapornlarp","doi":"10.1016/j.odw.2019.10.003","DOIUrl":"10.1016/j.odw.2019.10.003","url":null,"abstract":"<div><h3>Purpose</h3><p>To determine whether pre-treatment orthodontic case complexities were associated with their treatment outcomes in each category of malocclusion.</p></div><div><h3>Materials and methods</h3><p>Two hundred orthodontic cases treated with edgewise appliances from university clinic that satisfied requirements for the certification were studied. The Discrepancy Index (DI) and the Objective Grading System (OGS) were calculated. The relationship between these measurements was evaluated using Pearson’s correlation coefficient.</p></div><div><h3>Results</h3><p>The mean DI score was 23.67 ± 10.30, and the mean OGS score was 19.92 ± 6.92. Statistically, there was only a weak and insignificant correlation between the DI and OGS (r = 0.055, p &gt; 0.05). Buccolingual inclinations and interproximal contacts were components that had the highest and lowest mean OGS scores respectively.</p></div><div><h3>Conclusion</h3><p>Malocclusion complexity was not associated with orthodontic treatment outcomes. Cases which underwent two-phase treatment were found to have the most complex pre-treatment malocclusion and also the most unsatisfactory clinical outcomes. The OGS component with the highest discrepancies was buccolingual inclinations.</p></div>","PeriodicalId":43169,"journal":{"name":"Orthodontic Waves","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.odw.2019.10.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46159331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the relationship between dimensions of the upper airway and facial profile according to initial lateral cephalometric radiography in orthodontic patients in the north of Iran","authors":"Faeghe Gholinia ,&nbsp;Fateme Tavanayan ,&nbsp;Erfane Afsari Ardchi ,&nbsp;Shadman Nemati","doi":"10.1016/j.odw.2019.08.001","DOIUrl":"10.1016/j.odw.2019.08.001","url":null,"abstract":"<div><h3>Purpose</h3><p>Decreased upper airway dimensions due to adenoid enlargement may have unfavorable aesthetic and/or functional effects on the soft or hard tissue profile development. The aim of this study was to investigate the associations between adenoid sizes to upper airway size ratio (airway ratio) in the midsagittal plane and various types of soft and hard tissue facial profile convexity.</p></div><div><h3>Materials and methods</h3><p>251 lateral cephalometric<span> images of pre-orthodontic healthy subjects with age group of 6•12, 13•18, 19•25 and 26•29 years, were collected. They were classified into four subgroups based on the airway ratio (grade 1: &lt;1/4 í 100), (grade 2: 1/4•1/2 í 100), (grade 3:1/2•3/4 í 100) and (grade 4: &gt;3/4 í 100). The radiographs were characterized as convex, normal and concave soft tissue facial profile according to the facial convexity angle. Cephalometric analyses were done using Dolphin imaging computer software 11.95. Kruskal Wallis test was used to evaluate differences between airway ratio and facial morphologies; the mandibular plane angle was compared between airway ratio subgroups by Chi square.</span></p></div><div><h3>Results</h3><p>Airway ratio was not significantly different (<em>P</em> = 0.241) between soft tissue facial convexity subgroups and within age subgroups. Mandibular plane angle was in a significant relation within airway ratio (<em>p</em> = 0.028).</p></div><div><h3>Conclusion</h3><p>There was not any significant relation between decreased upper airway ratios and types of the soft or hard tissue facial profile convexity, however there was a significant relation between upper airway ratios and age subgroups. A significant revers correlation was seen between the mandibular plane angle and nasopharyngeal dimensions.</p></div>","PeriodicalId":43169,"journal":{"name":"Orthodontic Waves","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.odw.2019.08.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48629756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of three dimensional oropharyngeal airway and hyoid position in retrognathic adolescent patients","authors":"Fen Wan ,&nbsp;Min Wang ,&nbsp;Mo Guan ,&nbsp;Jianxin Wang ,&nbsp;Min Liu ,&nbsp;Xiaojing Pan","doi":"10.1016/j.odw.2019.04.003","DOIUrl":"10.1016/j.odw.2019.04.003","url":null,"abstract":"<div><h3>Objective</h3><p>To test the null hypotheses that there is no significant difference in the three-dimensional size of the oropharyngeal space or hyoid position when comparing individuals with a normal jaw relationship with individuals with retrognathic mandibles.</p></div><div><h3>Methods</h3><p>In total, 226 skeletal class I (0.7° ≤ ANB &lt; 4.7°) or class II (ANB &gt; = 4.7°) adolescent patients were examined and categorized into two groups: normal group and retrognathic group. Group classifications were made based on SNA angle, SNB angle, ANB angle, and maxillary length (Ptm-ANS). From the total available cases, 60 subjects met the above classification criteria and had a normo-divergent facial pattern, with 30 cases in each group. Cone beam computed tomography<span> (CBCT) images were collected for each participant and InVivoDental (Anatomage, San Jose, Calif) software was used to analyze 60 CBCT scans. Mimics 17.0 software was used to reconstruct the upper airway, and indices of oropharyngeal airway dimensions and hyoid position were calculated.</span></p></div><div><h3>Results</h3><p>The oropharyngeal airway dimensions of adolescent patients in the retrognathic group were smaller than adolescent patients in the normal group. The hyoid was positioned more superior and posterior in the retrognathic group. With decreases in mandibular length and SNB angle, oropharyngeal space volume tended to decrease, the hyoid tended to be more superior and posterior.</p></div><div><h3>Conclusion</h3><p>The null hypotheses were rejected. Significant differences in the three-dimensional size of the oropharyngeal space or hyoid position when comparing individuals with a normal jaw relationship with individuals with retrognathic mandibles.</p></div>","PeriodicalId":43169,"journal":{"name":"Orthodontic Waves","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.odw.2019.04.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46212509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reliability of Beta-angle in different anteroposterior and vertical combinations of malocclusions","authors":"Maged Sultan Alhammadi ,&nbsp;Bushra Sufyan Almaqrami ,&nbsp;BaoChang Cao","doi":"10.1016/j.odw.2019.02.002","DOIUrl":"10.1016/j.odw.2019.02.002","url":null,"abstract":"<div><h3>Purpose</h3><p>The aim of this study was to evaluate three-dimensionally the reliability of Beta angle and its validity in different skeletal anteroposterior and vertical malocclusions.</p></div><div><h3>Materials and methods</h3><p>This is a retrospective cross-sectional study. Two hundred and thirteen pre-treatment Cone-beam Computed Tomography (CBCT) scans (104 males and 109 females) were used in this study. Based on ANB angle, 100 patients were characterized as skeletal Class I (ANB<!--> <!-->=<!--> <!-->2.17<!--> <!-->±<!--> <!-->1.1°), 62 as skeletal Class II (ANB<!--> <!-->=<!--> <!-->5.8<!--> <!-->±<!--> <!-->1.47°), and 51 as skeletal Class III (ANB<!--> <!-->=<!--> <!-->−2.32<!--> <!-->±<!--> <!-->2.42°), and subdivided based on the mandibular plane angle (MP/SN) into normodivergent (MP/SN<!--> <!-->=<!--> <!-->32.09<!--> <!-->±<!--> <!-->2.31°) and hyperdivergent (MP/SN<!--> <!-->=<!--> <!-->40.45<!--> <!-->±<!--> <span>3.71°) groups. All cephalometric indicators were measured on 3D volumetric images using Anatomage software 5.2. Descriptive statistics and Pearson correlation between all variables irrespective of skeletal Class or growth pattern were performed. p Value of &lt;0.05 was considered significant.</span></p></div><div><h3>Results</h3><p>The overall Pearson correlation showed a statistically significant negative correlation (p<!--> <!-->&lt;<!--> <!-->0.001) between ANB and Beta angle (0.856). There was no significant (<em>p</em> <!-->&lt;<!--> <span>0.05) difference in the values of Beta angle, B–X and A–X distance for Class I, Class II and Class III malocclusion with normal and vertical growth pattern.</span></p></div><div><h3>Conclusions</h3><p>This three dimensional study interprets the stability of Beta angle irrespective of the difference in craniofacial morphology and growth pattern. Beta angle showed a strong correlation with ANB thus, can be used interchangeably in diagnosis of skeletal malocclusion.</p></div>","PeriodicalId":43169,"journal":{"name":"Orthodontic Waves","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.odw.2019.02.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44911357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acoustic pharyngometry vs lateral cephalometry: A comparative evaluation of pharyngeal airway dimensions in patients with skeletal class I and skeletal class II malocclusion","authors":"Sunil Kumar ,&nbsp;B. Jayan ,&nbsp;M.P. Prassana Kumar ,&nbsp;Mohit Sharma ,&nbsp;Karan Nehra ,&nbsp;Amit Kumar Bansal","doi":"10.1016/j.odw.2019.07.001","DOIUrl":"10.1016/j.odw.2019.07.001","url":null,"abstract":"<div><h3>Purpose</h3><p>The objective of this study was to study the difference in upper airway parameters using two different techniques, i.e. with lateral cephalometry<span> vis-a-vis acoustic pharyngometry in skeletal class I and class II subjects and to find any correlation in airway parameters recorded on cephalogram and acoustic pharyngometer.</span></p></div><div><h3>Materials and methods</h3><p><span>Sixty orthodontic patients with average growth pattern (FMA</span> <!-->=<!--> <!-->22–28°) were divided in to two groups based on sagittal jaw relationship. Pharyngeal airway dimensions were measured by two different techniques, i.e. on lateral cephalogram and acoustic Pharyngometry. The airway dimensions were compared across both the groups using these techniques.</p></div><div><h3>Results</h3><p>The linear airway parameters and total oropharyngeal area measured on lateral cephalogram (<em>P</em>-value 0.008) were significantly higher in skeletal class I patients. Total oropharyngeal area measured using acoustic pharyngometry was significantly higher in skeletal class I patients (<em>P</em> <!-->=<!--> <!-->0.009). The average area on lateral cephalogram and on acoustic pharyngometry did not differ significantly in skeletal class I group (<em>P</em> <!-->=<!--> <span>0.590). The comparison of average area in skeletal class II malocclusion group on lateral cephalogram and acoustic pharyngometry also did not differ significantly (</span><em>P</em> <!-->=<!--> <span>0.603). The average area on lateral cephalogram obtained by digital planimeter and acoustic pharyngometry did not differ significantly in both the classes of malocclusion (</span><em>P</em> <!-->=<!--> <!-->0.405).</p></div><div><h3>Conclusion</h3><p>The null hypothesis is rejected as there is significant difference in airway dimensions in skeletal class I and class II subjects and there is a positive correlation in airway parameters as recorded on lateral cephalogram and acoustic pharyngometer.</p></div>","PeriodicalId":43169,"journal":{"name":"Orthodontic Waves","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.odw.2019.07.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42799851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of vertical skeletal pattern on cortical and alveolar bone thickness and root spacing in the anterior maxilla assessed by cone beam computed tomography","authors":"Kitsiporn Boonumnuay ,&nbsp;Sirima Petdachai ,&nbsp;Vannaporn Chuenchompoonut","doi":"10.1016/j.odw.2019.04.004","DOIUrl":"10.1016/j.odw.2019.04.004","url":null,"abstract":"<div><h3>Purpose</h3><p>The aim of this study was to evaluate the dimensional properties of bone in the anterior maxilla<span> in patients with different vertical skeletal patterns in order to ensure safe placement of temporary anchorage devices.</span></p></div><div><h3>Materials and methods</h3><p>Fifty-one CBCT<span><span> images were divided into three equal groups according to vertical skeletal pattern, based on palatal plane to mandibular plane angle. Cortical bone<span> thickness, alveolar bone thickness and interdental root distance were measured between the teeth in the anterior maxilla at 6 mm and 8 mm apical to the interdental </span></span>cementoenamel junction.</span></p></div><div><h3>Results</h3><p><span>Cortical bone thickness was significantly different among vertical groups at some sites. Hyper-divergent subjects had thinner cortical bone than hypo-divergent and normo-divergent subjects. All three groups, in the anterior maxilla, cortical bone thickness tended to increase from between central incisors (U1–U1) to between </span>lateral incisor and canine (U2–U3). Alveolar bone thickness was greatest between central and lateral incisors (U1–U2), and the thinnest alveolar bone was at U1–U1 area. Average interdental root distance ranged from 1.33 ± 0.48 mm to 3.43 ± 1.25 mm. The largest and smallest interdental root distances were at U1–U1 and U1–U2 sites, respectively.</p></div><div><h3>Conclusion</h3><p>Placement of TADs in hyper-divergent subjects should be performed with caution. The suitable site for TADs in the anterior maxilla was between the lateral incisor and canine in all vertical skeletal patterns.</p></div>","PeriodicalId":43169,"journal":{"name":"Orthodontic Waves","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.odw.2019.04.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46349032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Treatment of a transmigrated and an impacted mandibular canine along with missing maxillary central incisor: A case report","authors":"Amit P. Jaisinghani ,&nbsp;Tejashri Pradhan ,&nbsp;Kanoba M. Keluskar ,&nbsp;Vanashree Takane","doi":"10.1016/j.odw.2019.04.002","DOIUrl":"10.1016/j.odw.2019.04.002","url":null,"abstract":"<div><h3>Introduction</h3><p><span>Treatment of a case with impacted canines is complex and numerous options are available ranging from disimpaction to </span>forced eruption.</p></div><div><h3>Objective</h3><p><span><span>The objective of this case report was to describe the treatment of a 19-year-old male, with a skeletal Class II, dental Class II Division 1 malocclusion, prognathic </span>maxilla<span>, proclined maxillary incisors, with missing left </span></span>maxillary central incisor<span> and bilateral mandibular canine impaction.</span></p></div><div><h3>Methodology</h3><p>The orthodontic treatment<span> plan included forced eruption of the impacted canines and conversion of maxillary left lateral incisor<span> to central incisor.</span></span></p></div><div><h3>Conclusion</h3><p>Proper diagnosis and implementation of orthodontic biomechanics can minimize the amount of prosthetic and surgical intervention needed in the management of transmigrated canine and smile designing.</p></div>","PeriodicalId":43169,"journal":{"name":"Orthodontic Waves","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.odw.2019.04.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48223250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-dimensional in vitro measurement of initial forces and moments acting on maxillary canine teeth using various Class II elastic configurations with a straight archwire fixed lingual appliance","authors":"Brandon Owen ,&nbsp;Bennett Bolen ,&nbsp;Berhanu A. Wubie ,&nbsp;Giseon Heo ,&nbsp;Jason P. Carey ,&nbsp;Paul W. Major ,&nbsp;Dan L. Romanyk","doi":"10.1016/j.odw.2019.04.005","DOIUrl":"10.1016/j.odw.2019.04.005","url":null,"abstract":"<div><h3>Purpose</h3><p>The presented study utilized an in vitro Orthodontic<span><span> SIMulator (OSIM) to study how Class II elastic configuration effects the forces and moments acting on maxillary canine teeth<span> when using a straight archwire fixed </span></span>lingual appliance.</span></p></div><div><h3>Materials and methods</h3><p><span>Maxillary in-Ovation L self-ligating brackets were bonded to anatomically shaped stainless steel teeth on OSIM. A 0.016″ × 0.022″ stainless steel straight lingual archwire was used to provide a relevant arch shape and to position simulated teeth in a passive position. A mandibular typodont was positioned above the OSIM arch in a half cusp Class II malocclusion to serve as attachment points for elastics. Four different elastic configurations were tested: 1. maxillary–buccal to mandibular-buccal; 2. maxillary–lingual to mandibular–lingual; 3. maxillary–buccal to mandibular–lingual; 4. maxillary–lingual to mandibular–buccal. A new 4.5 oz 3/16″ elastic (</span><em>n</em><span> = 40 per configuration) was attached to the maxillary canine and mandibular first molar teeth for each trial. Forces and moments at the maxillary canine simulated center of resistance were considered. ANOVA was used to assess the effect of elastic configuration, and pairwise comparisons using Bonferroni correction were conducted to investigate configuration differences.</span></p></div><div><h3>Results</h3><p>Of the thirty-four pairwise comparisons, only two were statistically insignificant. Configurations 1, 2, and 4 were found to produce over 1 N of force in the desired distal direction, whereas Configuration 3 was significantly lower at 0.65 N.</p></div><div><h3>Conclusions</h3><p>Overall, the configuration of Class II elastics had a significant effect on forces and moments at maxillary canine teeth for a simulated straight archwire fixed lingual appliance.</p></div>","PeriodicalId":43169,"journal":{"name":"Orthodontic Waves","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.odw.2019.04.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48567128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of tooth agenesis risks between tooth types in orthodontic patients with non-syndromic oligodontia","authors":"Ayaka Sato,&nbsp;Kazuhito Arai","doi":"10.1016/j.odw.2019.04.001","DOIUrl":"10.1016/j.odw.2019.04.001","url":null,"abstract":"<div><p><span><span>Oligodontia, a severe type of </span>hypodontia<span><span> generally characterized as tooth agenesis of six or more permanent teeth excluding third molars, is known to have a multifactorial etiology and the characteristics of </span>orthodontic<span> patients are not fully understood. The aim of the present study was to investigate the risks of tooth agenesis between tooth types of permanent dentition in orthodontic patients with non-syndromic oligodontia. Panoramic radiographs of 292 orthodontic patients (184 females and 108 males) were obtained from one university-based orthodontic clinic and 79 private orthodontic clinics in Japan. </span></span></span>Agenesis<span> of permanent teeth excluding third molars was evaluated. Multiple logistic regression analysis was conducted to evaluate the risk of simultaneous tooth agenesis between all tooth type combinations. Significant symmetry of tooth agenesis was observed for all tooth types. Twenty-six tooth type combinations showed a significantly increased risk of simultaneous tooth agenesis [odds ratios (ORs): 1.99⬜14.51], and 15 tooth type combinations showed a significantly decreased risk of simultaneous tooth agenesis (ORs: 0.11⬜0.56). These findings suggest early detection to establish appropriate multidisciplinary treatment planning and prediction of the risk for tooth agenesis of non-syndromic oligodontia.</span></p></div>","PeriodicalId":43169,"journal":{"name":"Orthodontic Waves","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.odw.2019.04.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45724641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}