Predicting Final Mandibular Length from Cervical Vertebrae
Author Information
Author(s): Yamaguchi Manami, Kim Yong-Il, Park Heetae, Yamaguchi Tetsutaro
Primary Institution: Kanagawa Dental University
Hypothesis
Can cervical vertebral morphology be used to accurately predict final mandibular length?
Conclusion
A highly accurate formula was developed to predict final mandibular length based on morphological changes in the fourth cervical vertebra.
Supporting Evidence
- The predictive model achieved a mean prediction error of 0.17 ± 0.08 mm.
- The marginal R2 value of the prediction formula was 0.957, indicating high accuracy.
- A Spearman’s correlation coefficient of 0.932 was found between mandibular length and chronological age.
- Significant morphological changes in the fourth cervical vertebra were observed at age 14.
Takeaway
This study found a way to guess how long a person's jaw will be when they grow up by looking at their neck bones in X-rays.
Methodology
Longitudinal lateral cephalograms of elementary school students aged 6–15 were analyzed using geometric morphometrics and linear mixed models.
Potential Biases
Potential bias due to the exclusive focus on female participants and historical data.
Limitations
The study is based on a small historical sample of Japanese females, which may limit generalizability.
Participant Demographics
44 female individuals aged 6–15 from Japan.
Statistical Information
P-Value
<0.001
Confidence Interval
82.58–83.11
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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