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KMID : 1149920130020010001
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Korean Journal of Limgual Orthodontics
2013 Volume.2 No. 1 p.1 ~ p.6
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The Reproducibility of Natural Head Position between Before and After Orthognathic Surgery
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Sohn Hee-Wook
Park In-Young
Park Young-Ju
Ahn Jang-Hoon
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Abstract
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Purpose: The aim of this study was to evaluate the reproducibility of the head posture between before and after surgery in one and two jaw surgical cases.
Methods: The subjects were 33 adult patients who received orthognathic surgery. All lateral cephalograms were taken in natural head position and measured at pre-surgical (T1), immediate after surgery (T2), and 6 months after surgery (T3). Craniovertical angle (SN/NTVL), craniocervical angle (SN/OPT, SN/CVT), cervical inclination angle (OPT/THL, CVT/THL), and cervical lordosis angle (OPT/CVT) were analyzed.
Results: In one jaw cases, T1 to T3 and T2to T3 comparison showed no statistically significant differences except T1 to T2 comparison (SN/OPT angle) according to paired t-test (p<0.05). In two jaw surgical cases, there were no statistically significant differences only in T1 to T3 comparison according to paired t-test (p<0.05). All parameters of one jaw and two jaw surgical cases showed significant correlation coefficients in T1 to T3 comparison according to Pearson correlation coefficient (p<0.05).
Conclusion: The head posture based on NHP did not change significantly 6 months after orthognathic surgery. Therefore, NHP can be a reliable head position for diagnosis and treatment planning of orthognathic surgical patients irrespective of surgical type.
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KEYWORD
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NHP, Reproducibility, Orthognathic surgery
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