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. 2017 Aug 1;9(8):e970-e975.
doi: 10.4317/jced.53819. eCollection 2017 Aug.

The relationship of mandibular radiomorphometric indices to skeletal age, chronological age and skeletal malocclusion type

Ali Tayebi  1 , Maryam Tofangchiha  2 , Mahsa-Arian Fard  3 , Armin Gosili  4
Affiliations

The relationship of mandibular radiomorphometric indices to skeletal age, chronological age and skeletal malocclusion type

Ali Tayebi et al. J Clin Exp Dent. .

Abstract

Background: The present study was performed with the following aims: (1) to assess the relationship between skeletal age, measured using the cervical vertebral maturity (CVM) method, and chronological age; (2) to determine the correlation of skeletal and chronological age to the cortical thickness of the lower border of the mandible using the linear radiomorphometric; and (3) to explore the relationship between these indices and skeletal malocclusion type.

Material and methods: The data were collected from the records of 180 patients, including 57 males (31.7%) and 123 females (68.3%). The data were based on the panoramic and lateral cephalograms of each patient. The CVM stages were determined on the basis of the patients' lateral cephalograms. Three radiomorphometric indices were measured: AI, MI and GI. The patients were divided up into three groups of skeletal malocclusion: Class I, II, and III. For all the tests, statistical significance was set at P<0.05.

Results: The relationship between chronological age and skeletal age was 0.496. Furthermore, with an increase in chronological and skeletal age, the cortical thickness of the lower border of the mandible and consequently the radiomorphometric indices increase, except for the GI (P > 0.05). Lastly, the relationship between GI and skeletal malocclusion type proved significant.

Conclusions: AI and MI were found to increase significantly with increasing age, so the assessment of mandibular radiomorphometric indices could be clinically useful in estimating of the growth and maturation of the mandible. Key words:Orthodontics, Radiomorphometric indices, Skeletal age, Skeletal malocclusion.

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Conflict of interest statement

Conflict of interest statement:The authors have declared that no conflict of interest exist.

Figures

Figure 1
Figure 1
The Baccetti technique used to determine the morphological changes in the cervical vertebrae (10).
Figure 2
Figure 2
Antegonial Index (a); (Length of “a” in mm).
Figure 3
Figure 3
Mental Index (b); and Gonial Index (c); (Length of “b and c” in mm).
See this image and copyright information in PMC

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