The HBN Angle

Dave, Harsh Bhagvatiprasad; Gill, Vikas; Rai, Divyaroop; Reddy, Y Narendranath

doi:10.4103/0301-5742.162239

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…Point M was defined by Nanda and Merill 11 in 1994. It was also used effectively by Neela PK et al, 12 Bhad WA et al, 13 and Dave HB et al 14 to introduce a new sagittal dysplasia indicator, the Yen angle, W angle, and HBN angle respectively. It was also used by Braun et al to study the growth vector in maxilla.…”

Section: Discussionmentioning

confidence: 99%

“…Point G was defined by Braun et al 17 in 2004, which was also used effectively by various authors. [12][13][14] The geometric location of these landmarks will allow for an accurate assessment of the vertical skeletal patterns.…”

Section: Discussionmentioning

confidence: 99%

“…Also, all the points used in this study have been used effectively in the past by various authors to derive cephalometric norms. [11][12][13][14] Fig. 2: Location of point C in a radius of 2 mm circle from true center of the condyle in a horizontal grower does not affect the DR angle…”

Section: Discussionmentioning

confidence: 99%

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Assessment of Vertical Skeletal Patterns using a New Cephalometric Parameter: The Dhaval—Rohan Angle

Lekhadia¹,

Rai²,

Hegde³

et al. 2017

Journal of Postgraduate Medicine, Education and Research

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Introduction The aim of this study was to establish a new cephalometric parameter, named the Dhaval—Rohan angle (DR), to assess the vertical skeletal patterns on a lateral cephalogram with accuracy and reproducibility. Materials and methods One hundred and twenty pretreatment lateral cephalograms of the patients visiting the department of orthodontics and dentofacial orthopedics for treatment were obtained and divided into three groups. i.e., horizontal growth pattern, average growth pattern, and vertical growth pattern cases based on the routinely used cephalometric parameters; FMA, SN-GoGn, Y-axis angle and Jarabak ratio. This angle uses three skeletal landmarks, the point C (center of the condyle), point M (midpoint of premaxilla), and point G (center of the largest circle that is tangent to the internal inferior, anterior, and posterior surfaces of the mandibular symphysis). Results The one-way analysis of variance (ANOVA) test showed that the three groups studied were not the same for DR angle and the post hoc Tukey test found the groups to be significantly different. According to the Student's t-test, there was no statistically significant difference in mean values of DR angle between males and females. Conclusion Cephalometric evaluation of young adults shows that the DR angle below 28.5° indicates a horizontal growth pattern, between 28.5 and 32.5° indicate an average growth pattern and above 32.5° indicate a vertical growth pattern. How to cite this article Lekhadia DR, Rai R, Hegde N, Hegde G, Sorake A, Kumar A. Assessment of Vertical Skeletal Patterns using a New Cephalometric Parameter: The Dhaval—Rohan Angle. J Postgrad Med Edu Res 2017;51(1):7-11.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Assessment of Vertical Skeletal Patterns using a New Cephalometric Parameter: The Dhaval—Rohan Angle

Lekhadia¹,

Rai²,

Hegde³

et al. 2017

Journal of Postgraduate Medicine, Education and Research

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A heuristic model for cephalometric diagnosis of sagittal dysplasia

et al. 2021

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Objective: To identify the best-suited cephalometric parameter for assessing the sagittal skeletal discrepancy in the Indian population. Design: An in vitro, observational, single-blinded, retrospective study. Setting: Department of Orthodontics and Dentofacial Orthopaedics. Methods: A total of 94 lateral cephalograms were used in this study. The study involved one key person and two examiners. The key person collected the radiographs, coded, analysed and classified them into three groups (skeletal classes I, II and III). Subsequently, the coded radiographs were independently analysed by the two examiners. They classified the cases by matching a minimum of 6 out of 11 parameters. On completion of diagnosis by the examiners, the samples were decoded and matched with the original diagnosis given by the key person. The samples in which identification of a particular cephalometric parameter matched the original evaluation as given by the key person was regarded as correctly diagnosed. The number of correctly assessed cases was used to judge the diagnostic performance of all the parameters in all the cases. Cross-validation of the method was performed, and a diagnostic algorithm was developed for diagnosis. Results: β angle and Pi angle showed a positive predictive value of 1 in both skeletal class I and II cases. ANB angle, W angle and HBN angle showed a positive predictive value of 1 in skeletal class III cases. Conclusion: No single cephalometric parameter can independently be used to diagnose sagittal skeletal discrepancy in all cases. However, a conclusive diagnosis on the type of sagittal skeletal malocclusion can be made by using a simple and easy to use diagnostic algorithmic process having a combination of cephalometric parameters.

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Reliability of Dhaval–Rohan angle for assessment of vertical dysplasia

Harpy,

Gaballah,

Fakhry

2024

Tanta Dental Journal

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Objectives Assessment of Dhaval–Rohan (DR) angle as a vertical dysplasia indicator. Materials and methods One hundred and forty lateral cephalometric radiographs of Egyptian orthodontic patients of both sexes with age ranging from 16 to 28 years old, collected from the record files of patients admitted for treatment of various malocclusions. The enrolled cases were subdivided based on SN/MP angle, FH/MP angle, Y-axis/FH angle, gonial angle, and LAFH/TAFH, into high angle (hyperdivergent), low angle (hypodivergent), and average (normodivergent) cases according to Aboul-Azm and colleagues. Each case had to have a minimum of three of the five parameters indicating its pattern of growth, DR angle was constructed by using three skeletal points; C (center of condyle where the angle located), M (center of premaxilla), and G (center of symphysis of mandible), the measured data were led to the computer and statistically analyzed using the Statistical Package for Social Sciences software, version 24. Quantitative data were expressed using range (minimum and maximum), mean, and SD. Significance of the obtained results was judged at P value less than 0.05. Results There is a strong correlation between the conventional parameters and DR angle. The cutoff point of the DR angle below 28° indicates a horizontal growth pattern, between 28.5 and 32.5° indicates an average growth pattern, and above 32.5° indicates a vertical skeletal growth pattern. Conclusion The DR angle is a reliable parameter in assessing vertical skeletal growth pattern with minimal cephalometric landmarks that easily and accurately located.

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The HBN Angle

Cited by 3 publications

References 14 publications

Assessment of Vertical Skeletal Patterns using a New Cephalometric Parameter: The Dhaval—Rohan Angle

Assessment of Vertical Skeletal Patterns using a New Cephalometric Parameter: The Dhaval—Rohan Angle

A heuristic model for cephalometric diagnosis of sagittal dysplasia

Reliability of Dhaval–Rohan angle for assessment of vertical dysplasia

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The HBN Angle

Cited by 3 publications

References 14 publications

Assessment of Vertical Skeletal Patterns using a New Cephalometric Parameter: The Dhaval&mdash;Rohan Angle

Assessment of Vertical Skeletal Patterns using a New Cephalometric Parameter: The Dhaval&mdash;Rohan Angle

A heuristic model for cephalometric diagnosis of sagittal dysplasia

Reliability of Dhaval–Rohan angle for assessment of vertical dysplasia

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Assessment of Vertical Skeletal Patterns using a New Cephalometric Parameter: The Dhaval—Rohan Angle

Assessment of Vertical Skeletal Patterns using a New Cephalometric Parameter: The Dhaval—Rohan Angle