Three dimensional reliability analyses of currently used methods for assessment of sagittal jaw discrepancy.
Three dimensional reliability analyses of currently used methods for assessment of sagittal jaw discrepancy.
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DOI：
10.4317/jced.54578
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发表时间：
2018-04
影响因子：
--
通讯作者：
Cao B
中科院分区：
文献类型：
--
作者：
Almaqrami BS;Alhammadi MS;Cao B
本研究的目的是从三维角度分析角度和线性测量在评估前后骨骼差异中的可靠性和相关性。在这项回顾性横断面研究中，对213例受试者进行了锥形束计算机断层扫描的三维分析。根据三维测量的前后关系（ANB角）将样本分为三组（骨性I类、II类和III类）。使用Anatomage软件（InVivo5.2）在体积图像上测量前后头影测量指标。这些测量包括三个角度和七个线性测量。进行交叉制表以将ANB角与每种方法相关联。采用组内相关系数（ICC）检验两种信度测量之间的差异。P值< 0.05被认为是显著的。在评估不同的前后关系时，所有方法之间的一致性具有统计学意义（P<0.05）。ANB与DSOJ的相关性最高（0.913），与AB/FH、AB/SN/、MM平分线、AB/PP、Wits评定的相关性最强（分别为0.896、0.890、0.878、0.867和0.858），与AD/SN和Beta角的相关性中等（分别为0.787和0.760），与校正ANB角的相关性较弱（0.550）。ANB角与DSOJ、AB/FH、AB/SN/、MM平分线、AB/PP和Wits评估在三维头影测量分析中的联合使用提供了更可靠和有效的骨骼前后关系指标。临床相关性：正畸文献中大多数采用单一方法（ANB）进行评估，但其在评估骨性差异方面存在不足，而骨性差异的评估是制定正确治疗计划的重要因素。 关键词：前后关系，ANB角，三维，CBCT。
The objective of this study was to analyse three dimensionally the reliability and correlation of angular and linear measurements in assessment of anteroposterior skeletal discrepancy. In this retrospective cross sectional study, a sample of 213 subjects were three-dimensionally analysed from cone-beam computed tomography scans. The sample was divided according to three dimensional measurement of anteroposterior relation (ANB angle) into three groups (skeletal Class I, Class II and Class III). The anterior-posterior cephalometric indicators were measured on volumetric images using Anatomage software (InVivo5.2). These measurements included three angular and seven linear measurements. Cross tabulations were performed to correlate the ANB angle with each method. Intra-class Correlation Coefficient (ICC) test was applied for the difference between the two reliability measurements. P value of < 0.05 was considered significant. There was a statistically significant (P<0.05) agreement between all methods used with variability in assessment of different anteroposterior relations. The highest correlation was between ANB and DSOJ (0.913), strong correlation with AB/FH, AB/SN/, MM bisector, AB/PP, Wits appraisal (0.896, 0.890, 0.878, 0.867,and 0.858, respectively), moderate with AD/SN and Beta angle (0.787 and 0.760), and weak correlation with corrected ANB angle (0.550). Conjunctive usage of ANB angle with DSOJ, AB/FH, AB/SN/, MM bisector, AB/PP and Wits appraisal in 3D cephalometric analysis provide a more reliable and valid indicator of the skeletal anteroposterior relationship. Clinical relevance: Most of orthodontic literature depends on single method (ANB) with its drawbacks in assessment of skeletal discrepancy which is a cardinal factors for proper treatment planning, this study assessed three dimensionally the degree of correlation between all available methods to make clinical judgement more accurate based on more than one method of assessment. Key words:Anteroposterior relationships, ANB angle, Three-dimension, CBCT.