Lower Incisor Inclination in Relation to Head Posture, Tongue and Hyoid Positions

Seden Akan; Defne Keçik

doi:10.7126/cumudj.553220

EN

Lower Incisor Inclination in Relation to Head Posture, Tongue and Hyoid Positions

Abstract

Objectives: To investigate the relationship between head posture, hyoid bone, tongue position and lower incisor inclination.

Materials and Methods: The study sample consisted of 98 subjects (35 males, 63 females), who had a mean age of 17.7 years in the permanent dentition and with a skeletal Class I relationship. Lower incisor inclination, craniovertical, craniocervical and craniohorizontal postural variables, tongue and hyoid position and airway measurements were evaluated on lateral cephalograms taken in natural head position. The study sample was divided into two groups according to lower incisor inclination (48 had IMPA<90 ⁰ with a mean degree of 88.09 and 50 had IMPA>90 ⁰ with a mean degree of 102.84) and a Student-t test was performed to compare and describe head posture, tongue and hyoid bone positions.

Results: The subjects with upright incisors had a more posteriorly positioned hyoid bone relative to the mandibular symphysis compared with the subjects with flared incisors (p<0.05). Tongue length was greater in the flared incisor group than in the upright incisor group (p<0.05). In relation to head posture measurements, the upright incisor group had 3-3.5° larger cranio-cervical angles (NSL-OPT, NSL-CVT, NL-OPT, NL-CVT angles, p<0.05) than the flared incisor group. The airway measurements revealed no statistically significant difference between the groups.

Conclusions: The position of the hyoid bone, tongue length and craniocervical head posture showed significant differences between upright and flared lower incisors.

Keywords

incisor,tongue posture,hyoid bone

References

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Details

Primary Language

English

Subjects

Health Care Administration

Journal Section

Research Article

Authors

Seden Akan ^*
0000-0001-7955-3086
Türkiye

Defne Keçik
0000-0001-9123-2744
Türkiye

Publication Date

September 9, 2019

Submission Date

April 12, 2019

Acceptance Date

June 25, 2019

Published in Issue

Year 2019 Volume: 22 Number: 3

DOI

https://doi.org/10.7126/cumudj.553220

IZ

https://izlik.org/JA84AU78HD

Cite

RIS / Bibtex

EndNote

Akan S, Keçik D (September 1, 2019) Lower Incisor Inclination in Relation to Head Posture, Tongue and Hyoid Positions. Cumhuriyet Dental Journal 22 3 310–317.

Cited By

The Relation Between Posture and Dimension of Tongue and Different Sagittal Skeletal Patterns and Vertical Skeletal Patterns in Class I and Class II Patients: A CBCT Study

International Journal of Dentistry

https://doi.org/10.1155/ijod/5529949

Öz

Lower Incisor Inclination in Relation to Head Posture, Tongue and Hyoid Positions

Abstract

Keywords

References

Details

Primary Language

Subjects

Journal Section

Authors

Publication Date

Submission Date

Acceptance Date

Published in Issue

DOI

IZ

Cite

Cited By

The Relation Between Posture and Dimension of Tongue and Different Sagittal Skeletal Patterns and Vertical Skeletal Patterns in Class I and Class II Patients: A CBCT Study