Maged Sultan Alhammadi , Bushra Sufyan Almaqrami , BaoChang Cao
{"title":"β角在不同前后垂直组合错牙合中的可靠性","authors":"Maged Sultan Alhammadi , Bushra Sufyan Almaqrami , BaoChang Cao","doi":"10.1016/j.odw.2019.02.002","DOIUrl":null,"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 <0.05 was considered significant.</span></p></div><div><h3>Results</h3><p>The overall Pearson correlation showed a statistically significant negative correlation (p<!--> <!--><<!--> <!-->0.001) between ANB and Beta angle (0.856). There was no significant (<em>p</em> <!--><<!--> <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":"78 3","pages":"Pages 111-117"},"PeriodicalIF":0.5000,"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":"3","resultStr":"{\"title\":\"Reliability of Beta-angle in different anteroposterior and vertical combinations of malocclusions\",\"authors\":\"Maged Sultan Alhammadi , Bushra Sufyan Almaqrami , BaoChang Cao\",\"doi\":\"10.1016/j.odw.2019.02.002\",\"DOIUrl\":null,\"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 <0.05 was considered significant.</span></p></div><div><h3>Results</h3><p>The overall Pearson correlation showed a statistically significant negative correlation (p<!--> <!--><<!--> <!-->0.001) between ANB and Beta angle (0.856). There was no significant (<em>p</em> <!--><<!--> <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\":\"78 3\",\"pages\":\"Pages 111-117\"},\"PeriodicalIF\":0.5000,\"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\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Orthodontic Waves\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1344024118301699\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"DENTISTRY, ORAL SURGERY & MEDICINE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Orthodontic Waves","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1344024118301699","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
Reliability of Beta-angle in different anteroposterior and vertical combinations of malocclusions
Purpose
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.
Materials and methods
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 ± 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 <0.05 was considered significant.
Results
The overall Pearson correlation showed a statistically significant negative correlation (p < 0.001) between ANB and Beta angle (0.856). There was no significant (p < 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.
Conclusions
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.
期刊介绍：
Orthodontic Waves is the official publication of the Japanese Orthodontic Society. The aim of this journal is to foster the advancement of orthodontic research and practice. The journal seeks to publish original articles (i) definitive reports of wide interest to the orthodontic community, (ii) Case Reports and (iii) Short Communications. Research papers stand on the scientific basis of orthodontics. Clinical topics covered include all techniques and approaches to treatment planning. All submissions are subject to peer review.
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