Gonial angle and ramus height as sex determinants: A radiographic pilot study

Rupa, KR; Chatra, Laxmikanth; Shenai, Prashanth; Koul, Veena; Rao, Prasanna Kumar; Prabhu, Rachana V; Kushraj, Tashika; Shetty, Pratima; Hameed, Shaul

doi:10.4103/2278-9588.163247

Cited by 6 publications

(6 citation statements)

References 1 publication

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“…Various PR studies [6,12,21,34], both from Turkey and other populations, showed that the GA was higher in females than in males. This and some other studies [24,30,33], however, found no difference between GA values and gender. Different results can be attributed to the effect of the masticatory muscles such as the masseter and medial pterygoid muscles (which insert into the gonion) and forces that vary among people and affect the size of the GA [10,15,28].…”

Section: Discussionsupporting

confidence: 49%

“…However, the GA generally had higher mean values in the lowest (10)(11)(12)(13)(14)(15)(16)(17)(18)(19) and highest (60-69) age groups than in the other age groups. However, no significant difference was noted between the GA and different age groups; widening of the GA in older patients has been attributed to the loss of teeth [30]. Izard [16] cited the following averages in the variability of the GA: 135° to 150° at birth, 130° to 140° when the first dentition is finished, 120° to 130° up to the time of eruption of the second molars; and 120° to 150° in old age.…”

Section: Age Groups N Pr Cbctmentioning

confidence: 99%

“…Various skeletal morphological features can be used for sex determination. Visual analysis of the human skeleton is challenging, thus the assessment of bones requires the use of metric analysis, which provides objectiveness [30]. The mandible is the most reliable gender indicator in the craniofacial skeleton [30].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of cone-beam computed tomography and panoramic radiography for mandibular morphometry

Taşsöker¹,

Akin²,

Kabakçı³

et al. 2019

Folia Morphol

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Background: The aim of this study was to compare the morphological differences in the mandible between patients with six age groups and to detect the correlation between these parameters on panoramic radiography (PR) and cone-beam computed tomography (CBCT). Materials and methods: A total of 121 subjects (50 males and 71 females) were included in the study and were divided into six age groups (10-19, 20-29, 30-39, 40-49, 50-59, and 60-69) on the basis of the chronological age. CBCT and PR methods were used to record the mandibular measurements for the same 121 patients. Differences between male and female mandibular morphometric measurements, between right and left side measurements, and differences in age subgroups compared by using independent samples t-test, paired samples t-test, and one-way ANOVA test, respectively. P < 0.05 value was considered statistically significant for all analysis. Results: Males mostly have higher mandibular measurement values. There were statistically significant differences between CBCT and PR measurements (p < 0.05). PR mostly showed higher values than CBCT measurements. Conclusions: Based on the fact that PRs showing significant differences from CBCT in the morphometric measurements made on mandible, it is recommended that forensic doctors and anthropologists consider this information in their age and gender prediction studies.

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Section: Discussionsupporting

confidence: 49%

Section: Age Groups N Pr Cbctmentioning

confidence: 99%

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Comparison of cone-beam computed tomography and panoramic radiography for mandibular morphometry

Taşsöker¹,

Akin²,

Kabakçı³

et al. 2019

Folia Morphol

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“…9 The angle is formed by the ramus line and the mandibular line and varies depending on gender, age, and ethnicity. [10][11][12] A negative correlation was reported between the gonial angle and bone structure in a previous study. 13 Moreover, high gonial angles are associated with weaker bite forces and decreased cortical bone thickness.…”

mentioning

confidence: 81%

“…In contrast, the mandibular gonial angle is a quantitative indicator used to explain the mandibular growth pattern 9 . The angle is formed by the ramus line and the mandibular line and varies depending on gender, age, and ethnicity 10–12 . A negative correlation was reported between the gonial angle and bone structure in a previous study 13 .…”

Section: Introductionmentioning

confidence: 99%

Relationship between gonial angle and articular disk position of the temporomandibular joints: A retrospective study

Muraoka

Hirahara

Tokunaga

et al. 2022

Oral Science International

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PurposeMagnetic resonance imaging (MRI) is frequently used to diagnose temporomandibular joint disease. However, very few studies have assessed the relationship between the mandibular gonial angle and temporomandibular joint (TMJ) disorders using panoramic radiography and MRI. The aim of this study was to assess the relationship between the gonial angle and articular disk position of the TMJs using panoramic radiography and MRI.Material and methodThe patients underwent panoramic radiography and MRI simultaneously at a university hospital between April 2017 and March 2018. We analyzed the records of 109 patients with and without disc displacement. Among these, 88 patients had disc displacement of the TMJ, while 21 patients were normal. The variable “mean mandibular gonial angle” was evaluated as a predictor. The primary outcome was the presence or absence of disc displacement in the TMJs. The other variables included sex and age. Data were analyzed using Spearman's rank correlation coefficient, the Mann–Whitney U test, and receiver operating characteristic (ROC) curves. Statistical significance was set at P < 0.05.ResultsThere was no significant difference between men and women in mean gonial angle, and there was no correlation with age (P > 0.05). Moreover, the mean mandibular gonial angle in the disc displacement group was significantly higher than that in the nondisc displacement group (P < 0.01). ROC analysis revealed a cutoff mandibular gonial angle of 120.23° for predicting the development of disc displacement.ConclusionsMandibular gonial angle is a useful parameter for predicting disc displacement of the TMJs.

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