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Craniofacial Asymmetry in Adults With Neglected Congenital Muscular Torticollis.

Jeong KY, Min KJ, Woo J, Yim SY - Ann Rehabil Med (2015)

Bottom Line: The frontal and the zygomatic length ratio (i.e., the anteroposterior length asymmetry on the axial plane) was 1.06±0.03 and 1.07±0.03, respectively, which was increased significantly with age in the linear regression analysis (r(2)=0.176, p=0.019 and r(2)=0.188, p=0.015, respectively).The vertical or lateral displacement of the facial landmarks and rotation of the mandibular axis did not significantly correlate with age (p>0.05).This finding may enhance the understanding of therapeutic strategies for craniofacial asymmetry in adults with neglected CMT.

View Article: PubMed Central - PubMed

Affiliation: The Clinic for Torticollis, Department of Physical Medicine and Rehabilitation, Ajou University School of Medicine, Suwon, Korea.

ABSTRACT

Objective: To evaluate the craniofacial asymmetry in adults with neglected congenital muscular torticollis (CMT) by quantitative assessment based on craniofacial three-dimensional computed tomography (3D-CT).

Methods: Preoperative craniofacial asymmetry was measured by 3D-CT for 31 CMT subjects ≥18 years of age who visited a tertiary medical center and underwent 3D-CT between January 2009 and December 2013. The relationship between the age and the severity of craniofacial asymmetry was analyzed in reference to anteroposterior length asymmetry of the frontal bone and zygomatic arch, vertical and lateral displacements of the facial landmarks, and mandibular axis rotation.

Results: The age at CT was 27.71±7.02 years (range, 18-44 years). All intra-class correlation coefficients were higher than 0.7, suggesting good inter-rater reliability (p<0.05) of all the measurements. The frontal and the zygomatic length ratio (i.e., the anteroposterior length asymmetry on the axial plane) was 1.06±0.03 and 1.07±0.03, respectively, which was increased significantly with age in the linear regression analysis (r(2)=0.176, p=0.019 and r(2)=0.188, p=0.015, respectively). The vertical or lateral displacement of the facial landmarks and rotation of the mandibular axis did not significantly correlate with age (p>0.05).

Conclusion: Craniofacial asymmetry of neglected CMT became more severe with age in terms of anteroposterior length asymmetry of the ipsilateral frontal bone and zygomatic arch on the axial plane even after growth cessation. This finding may enhance the understanding of therapeutic strategies for craniofacial asymmetry in adults with neglected CMT.

No MeSH data available.


Related in: MedlinePlus

Measurement of the lateral length asymmetry on the coronal plane. (A) The distances from the y1-axis to the paired landmarks mentioned in Fig. 2A were measured in frontal view. The yULR, k/l, which represents the lateral length asymmetry of the LO from the y1-axis on the CMT side in comparison with that on the non-CMT side. The yMLR, m/n, represents the lateral length asymmetry of ZY. The yLLR, o/p, represents the lateral length asymmetry of GO on the CMT side in comparison with that on the non-CMT side. (B) Linear regression analyses between yULR, yMLR, yLLR, and the subjects' ages. LO, latero-orbitale; CMT, congenital muscular torticollis; ZY, zygonion; GO, gonion.
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Figure 3: Measurement of the lateral length asymmetry on the coronal plane. (A) The distances from the y1-axis to the paired landmarks mentioned in Fig. 2A were measured in frontal view. The yULR, k/l, which represents the lateral length asymmetry of the LO from the y1-axis on the CMT side in comparison with that on the non-CMT side. The yMLR, m/n, represents the lateral length asymmetry of ZY. The yLLR, o/p, represents the lateral length asymmetry of GO on the CMT side in comparison with that on the non-CMT side. (B) Linear regression analyses between yULR, yMLR, yLLR, and the subjects' ages. LO, latero-orbitale; CMT, congenital muscular torticollis; ZY, zygonion; GO, gonion.

Mentions: Lateral length asymmetry of facial landmarks LO, ZY, and GO was measured as depicted in Fig. 3A. The y-upper landmark length ratio (yULR), k/l, represents the lateral length asymmetry of the LO from the y1-axis on the CMT side in comparison with that on the non-CMT side. The y-middle landmark length ratio (yMLR), m/n, represents the lateral length asymmetry of the ZY on the CMT side in comparison with that on the non-CMT side. The y-lower landmark length ratio (yLLR), o/p, represents the lateral length asymmetry of the GO on the CMT side in comparison with that on the non-CMT side.


Craniofacial Asymmetry in Adults With Neglected Congenital Muscular Torticollis.

Jeong KY, Min KJ, Woo J, Yim SY - Ann Rehabil Med (2015)

Measurement of the lateral length asymmetry on the coronal plane. (A) The distances from the y1-axis to the paired landmarks mentioned in Fig. 2A were measured in frontal view. The yULR, k/l, which represents the lateral length asymmetry of the LO from the y1-axis on the CMT side in comparison with that on the non-CMT side. The yMLR, m/n, represents the lateral length asymmetry of ZY. The yLLR, o/p, represents the lateral length asymmetry of GO on the CMT side in comparison with that on the non-CMT side. (B) Linear regression analyses between yULR, yMLR, yLLR, and the subjects' ages. LO, latero-orbitale; CMT, congenital muscular torticollis; ZY, zygonion; GO, gonion.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4496516&req=5

Figure 3: Measurement of the lateral length asymmetry on the coronal plane. (A) The distances from the y1-axis to the paired landmarks mentioned in Fig. 2A were measured in frontal view. The yULR, k/l, which represents the lateral length asymmetry of the LO from the y1-axis on the CMT side in comparison with that on the non-CMT side. The yMLR, m/n, represents the lateral length asymmetry of ZY. The yLLR, o/p, represents the lateral length asymmetry of GO on the CMT side in comparison with that on the non-CMT side. (B) Linear regression analyses between yULR, yMLR, yLLR, and the subjects' ages. LO, latero-orbitale; CMT, congenital muscular torticollis; ZY, zygonion; GO, gonion.
Mentions: Lateral length asymmetry of facial landmarks LO, ZY, and GO was measured as depicted in Fig. 3A. The y-upper landmark length ratio (yULR), k/l, represents the lateral length asymmetry of the LO from the y1-axis on the CMT side in comparison with that on the non-CMT side. The y-middle landmark length ratio (yMLR), m/n, represents the lateral length asymmetry of the ZY on the CMT side in comparison with that on the non-CMT side. The y-lower landmark length ratio (yLLR), o/p, represents the lateral length asymmetry of the GO on the CMT side in comparison with that on the non-CMT side.

Bottom Line: The frontal and the zygomatic length ratio (i.e., the anteroposterior length asymmetry on the axial plane) was 1.06±0.03 and 1.07±0.03, respectively, which was increased significantly with age in the linear regression analysis (r(2)=0.176, p=0.019 and r(2)=0.188, p=0.015, respectively).The vertical or lateral displacement of the facial landmarks and rotation of the mandibular axis did not significantly correlate with age (p>0.05).This finding may enhance the understanding of therapeutic strategies for craniofacial asymmetry in adults with neglected CMT.

View Article: PubMed Central - PubMed

Affiliation: The Clinic for Torticollis, Department of Physical Medicine and Rehabilitation, Ajou University School of Medicine, Suwon, Korea.

ABSTRACT

Objective: To evaluate the craniofacial asymmetry in adults with neglected congenital muscular torticollis (CMT) by quantitative assessment based on craniofacial three-dimensional computed tomography (3D-CT).

Methods: Preoperative craniofacial asymmetry was measured by 3D-CT for 31 CMT subjects ≥18 years of age who visited a tertiary medical center and underwent 3D-CT between January 2009 and December 2013. The relationship between the age and the severity of craniofacial asymmetry was analyzed in reference to anteroposterior length asymmetry of the frontal bone and zygomatic arch, vertical and lateral displacements of the facial landmarks, and mandibular axis rotation.

Results: The age at CT was 27.71±7.02 years (range, 18-44 years). All intra-class correlation coefficients were higher than 0.7, suggesting good inter-rater reliability (p<0.05) of all the measurements. The frontal and the zygomatic length ratio (i.e., the anteroposterior length asymmetry on the axial plane) was 1.06±0.03 and 1.07±0.03, respectively, which was increased significantly with age in the linear regression analysis (r(2)=0.176, p=0.019 and r(2)=0.188, p=0.015, respectively). The vertical or lateral displacement of the facial landmarks and rotation of the mandibular axis did not significantly correlate with age (p>0.05).

Conclusion: Craniofacial asymmetry of neglected CMT became more severe with age in terms of anteroposterior length asymmetry of the ipsilateral frontal bone and zygomatic arch on the axial plane even after growth cessation. This finding may enhance the understanding of therapeutic strategies for craniofacial asymmetry in adults with neglected CMT.

No MeSH data available.


Related in: MedlinePlus