Maturation of cervical vertebrae in relation to menarche

Jin-Hwa Lee; Yoon-Goo Kang; Ki-Soo Lee; Jong-Hyun Nam

doi:10.4041/kjod.2009.39.1.28

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Lee, Kang, Lee, and Nam: Maturation of cervical vertebrae in relation to menarche

Original Article

Korean Journal of Orthodontics

Korean Journal of Orthodontics 2009; 39(1): 28-35.

Published online: 28 February 2009

DOI: https://doi.org/10.4041/kjod.2009.39.1.28

Maturation of cervical vertebrae in relation to menarche

Jin-Hwa Lee, DMD, MSD^a, Yoon-Goo Kang, DMD, MSD, PhD^b, Ki-Soo Lee, DMD, MSD, PhD^c, Jong-Hyun Nam, DMD, MSD, PhD^d

^aFellow, Department of Orthodontics, Dental Hospital, Kyunghee Medical Center, Korea.

^bClinical Assistant Professor, Department of Orthodontics, School of Dentistry, Kyunghee University, Korea.

^cProfessor, Department of Orthodontics, School of Dentistry, Kyunghee University, Korea.

^dAssistant Professor, Department of Orthodontics, School of Dentistry, Kyunghee University, Korea.

Corresponding author: Jong-Hyun Nam. Department of Orthodontics, Dental Hospital, East-west Neo Medical Center, Kyunghee University, 149, Sangil-dong, Gangdong-gu, Seoul 134-727, Korea. +82 2 440 7511; orthopia@unitel.co.kr

Received 30 June 2008 Revised 17 October 2008 Accepted 20 October 2008

Abstract

Objective

The purpose of this study was to investigate the relationship between menarche and cervical vertebral maturation.

Methods

Lateral cephalograms of 67 young korean girls within the range of 1 year before or after their menarche were gathered. The concavity of the cervical vertebrae base and the ratio of the base length to the 3rd and 4th cervical vertebrae anterior height were measured and analyzed.

Results

The mean measured values were as follows; concavity of the 3rd cervical vertebrae base: 1.27 (± 0.18) mm, concavity of the 4th cervical vertebrae base: 1.06 (± 0.15) mm, ratio of the base length to the 3rd cervical vertebrae anterior height: 0.73 (± 0.06) and ratio of the base length to the 4th cervical vertebrae anterior height: 0.70 (± 0.05). There was a significant increase in the ratio of the base length to the 3rd vertebrae anterior height and the base concavity of the 3rd and 4th cervical vertebrae during the period of 1 year before to 1 year after their menarche.

Conclusions

These characteristics of the 3rd and 4th cervical vertebrae on the lateral cephalogram can provide useful clues on evaluating the growth stage.

Keywords: Lateral cephalogram, Cervical vertebrae, Menarche

Figures and Tables

Fig 1

Method of measuring the concavity of the cervical vertebrae: distance from the tangent line of the base to the deepest point.

Fig 2

Method of measuring the base and the anterior height of the cervical vertebrae.

Fig 3

Average curve of the concavity of the cervical vertebrae. The same abbreviation as Table 2.

Fig 4

Average curve of the ratio between the length of the base and the anterior height. The same abbreviation as Table 2.

Table 1

Distribution of samples according to time interval around menarche

Table 2

Results of quantitative analysis: descriptive analysis (n = 77)

SD, Standard deviation; c3, 3rd cervical vertebrae; c4, 4th cervical vertebrae; con, convexity of cervical vertebrae; bar, ratio of the base length to the vertebrae anterior height.

Table 3

Results of statistical comparisons (Kruskal-Wallis test for c3con and c4con, ANOVA with post hoc Scheffe's test for c3bar and c4bar) of measurements for the three groups

The same abbreviation as Table 2. ^*p < 0.05.

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