The applicability of a non-anatomical soft and hard tissue centroid line (S&amp;H centroid) in cephalometrics

Alshahrani, Ibrahim; Al-Balkhi, Khalid M.; Almadi, A. N.

doi:10.1016/j.sdentj.2010.02.008

Cited by 2 publications

(1 citation statement)

References 13 publications

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“… 28 Moreover, there is strong statistical evidence in favor of the fact that centroid is the most stable point of an area or volume, which is changing in shape . 29 …”

Section: Discussionmentioning

confidence: 99%

Tau Angle: A New Approach for Assessment of True Sagittal Maxillomandibular Relationship

Gupta

Singh

Tripathi

et al. 2020

International Journal of Clinical Pediatric Dentistry

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A bstract Aim The orthodontic treatment planning relies on correct diagnosis of skeletal discrepancy, which demands accurate and precise cephalometric parameters. This study proposed an angle, which is based on unvarying cephalometric points and gives a true sagittal skeletal maxillomandibular relationship. Materials and methods The present study was conducted on 279 individuals (13–30 years), which were divided into three groups (class I, II, and III skeletal malocclusion) depending on beta, wits, and ANB (A point, Nasion, B point) angles. Tau angle was measured, which lied at the junction of lines connecting the points T to G and G to M. ANOVA and the Dunnett T3 post hoc test were used to discern difference between three skeletal patterns. The gender difference in each skeletal pattern was found using the unpaired Student's t -test. Receiver-operating characteristic (ROC) curves determined the Tau angle's sensitivity and specificity to differentiate among skeletal patterns. Results The Tau angle between 28° and 34° suggests a skeletal class I malocclusion; values below 28° show a class III skeletal pattern and above 34° suggest skeletal class II pattern. Conclusion Tau angle gives a true sagittal skeletal relationship, which depends on stable landmarks and is unaffected by rotation of jaws in vertical dimension due to growth or orthodontic therapy. Clinical significance Tau angle provides a demarcation among three skeletal malocclusions, which can be an important tool for treatment planning in pediatric patients having both anteroposterior and vertical dentofacial discrepancies. How to cite this article Gupta P, Singh N, Tripathi T, et al. Tau Angle: A New Approach for Assessment of True Sagittal Maxillomandibular Relationship. Int J Clin Pediatr Dent 2020;13(5):497–500.

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“… 28 Moreover, there is strong statistical evidence in favor of the fact that centroid is the most stable point of an area or volume, which is changing in shape . 29 …”

Section: Discussionmentioning

confidence: 99%

Tau Angle: A New Approach for Assessment of True Sagittal Maxillomandibular Relationship

Gupta

Singh

Tripathi

et al. 2020

International Journal of Clinical Pediatric Dentistry

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The Tau Angle, Beta Angle, ANB Angle and Wits Appraisal in Assessing Sagittal Skeletal Relationship- A Cephalometric Study

Harini. M.,

Kumar,

Anbarasu

et al. 2024

International Journal of Innovative Science and Research Techno

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The assessment of the sagittal skeletal relationship is critically important in orthodontic diagnosis and treatment planning. The Tau angle is used to assess the sagittal skeletal relationship which relies on stable craniofacial landmarks: points T, G, and M. This present study aims to evaluate the reliability of the Tau angle, Beta angle, ANB angle and Wit’s appraisal in assessment of anteroposterior jaw dysplasia thus in future the Tau angle would stand along with other novel sagittal relationship indicators. This study included pretreatment lateral cephalograms of 279 patients, age group 13- 30 years visiting our Department of Orthodontics and Dentofacial Orthopedics of a dental institution. They were grouped into skeletal class I, II and III mal-occlusion depending on Tau angle, Beta angle, ANB angle and Wit’s appraisal. One sample t- test used to determine the differences among the three skeletal patterns. In assessing sagittal relationship, skeletal class I malocclusion would have Tau angle 28 ̊- 34 ̊, Beta angle 27 ̊- 35 ̊, ANB 2=/-2 ̊, Wit’s- AO and BO coinciding in females, BO 1mm ahead of AO in males; Skeletal class II malocclusion would have Tau angle >34 ̊, Beta less than 27 ̊, ANB >4̊ ̊, Wit’s -AO leading BO in females, AO similar to or leading ahead of BO in males; skeletal class III malocclusion would have Tau angle less than 28 ̊, Beta angle < 35 ̊, ANB less than 1, Wit’s BO ahead of AO in females, BO ahead of AO greater than 1mm. The statistical analysis revealed no significant difference in the mean Tau, Beta, ANB angle and Wit’s appraisal values among three groups with those of standard reference values (p ≤ 0.05).

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The applicability of a non-anatomical soft and hard tissue centroid line (S&H centroid) in cephalometrics

Cited by 2 publications

References 13 publications

Tau Angle: A New Approach for Assessment of True Sagittal Maxillomandibular Relationship

Tau Angle: A New Approach for Assessment of True Sagittal Maxillomandibular Relationship

The Tau Angle, Beta Angle, ANB Angle and Wits Appraisal in Assessing Sagittal Skeletal Relationship- A Cephalometric Study

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