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Effects of modified and conventional facemask therapies with expansion on dynamic measurement of natural head position in Class III patients.
Am J Orthod Dentofacial Orthop. 2011 Nov; 140(5):e223-31.AJ

Abstract

INTRODUCTION

The aim of this prospective clinical trial was to assess the effects of varying force directions on the dynamic measurement of natural head position and orofacial airway dimensions of Class III patients during maxillary orthopedic protraction compared with an untreated control group.

METHODS

The conventional facemask group comprised 15 patients (8 girls, 7 boys; mean age, 9.6 ± 1.3 years), the modified facemask group comprised 15 patients (7 girls, 8 boys; mean age, 9.5 ± 1.5 years), and the control group comprised 15 subjects (7 girls, 8 boys; mean age, 9.8 ± 1.6 years). Natural head position measurements and cephalometric records were obtained from all subjects before and after treatment or the control period (approximately 1 year). An inclinometer and a portable data logger were used to collect the dynamic natural head position data. For statistical comparisons, paired samples t tests, analysis of variance (ANOVA), and post-hoc Tukey tests were used at the P <0.05 level.

RESULTS

Both treatment groups showed statistically significant changes in the sagittal (pitch) measurements of natural head position and upper pharynx, aerial, and total area of airway measurements during the treatment period. In the control group, the only statistically significant change was an increased upper pharynx measurement (P = 0.020). According to the intergroup comparisons, statistically significant natural head position differences were found in the conventional (6.4° flexion) and the modified (5.7° flexion) facemask groups when compared with the controls. The modified facemask group also showed significant changes in aerial (P = 0.003) and total (P <0.001) areas of the airway measurements compared with the control group. No statistically significant differences were observed between the 2 treatment groups.

CONCLUSIONS

These findings suggest that modified and conventional facemask therapy with expansion have significant cranial flexion effects on the dynamic measurements of natural head position. Additionally, the modified facemask procedure showed significant effects on the orofacial airway dimensions compared with the initial values and the values of the untreated controls.

Authors+Show Affiliations

Department of Orthodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Journal Article

Language

eng

PubMed ID

22051500

Citation

Yagci, Ahmet, et al. "Effects of Modified and Conventional Facemask Therapies With Expansion On Dynamic Measurement of Natural Head Position in Class III Patients." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 140, no. 5, 2011, pp. e223-31.
Yagci A, Uysal T, Usumez S, et al. Effects of modified and conventional facemask therapies with expansion on dynamic measurement of natural head position in Class III patients. Am J Orthod Dentofacial Orthop. 2011;140(5):e223-31.
Yagci, A., Uysal, T., Usumez, S., & Orhan, M. (2011). Effects of modified and conventional facemask therapies with expansion on dynamic measurement of natural head position in Class III patients. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 140(5), e223-31. https://doi.org/10.1016/j.ajodo.2011.05.018
Yagci A, et al. Effects of Modified and Conventional Facemask Therapies With Expansion On Dynamic Measurement of Natural Head Position in Class III Patients. Am J Orthod Dentofacial Orthop. 2011;140(5):e223-31. PubMed PMID: 22051500.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of modified and conventional facemask therapies with expansion on dynamic measurement of natural head position in Class III patients. AU - Yagci,Ahmet, AU - Uysal,Tancan, AU - Usumez,Serdar, AU - Orhan,Metin, PY - 2010/12/01/received PY - 2011/05/01/revised PY - 2011/05/01/accepted PY - 2011/11/5/entrez PY - 2011/11/5/pubmed PY - 2011/12/30/medline SP - e223 EP - 31 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 140 IS - 5 N2 - INTRODUCTION: The aim of this prospective clinical trial was to assess the effects of varying force directions on the dynamic measurement of natural head position and orofacial airway dimensions of Class III patients during maxillary orthopedic protraction compared with an untreated control group. METHODS: The conventional facemask group comprised 15 patients (8 girls, 7 boys; mean age, 9.6 ± 1.3 years), the modified facemask group comprised 15 patients (7 girls, 8 boys; mean age, 9.5 ± 1.5 years), and the control group comprised 15 subjects (7 girls, 8 boys; mean age, 9.8 ± 1.6 years). Natural head position measurements and cephalometric records were obtained from all subjects before and after treatment or the control period (approximately 1 year). An inclinometer and a portable data logger were used to collect the dynamic natural head position data. For statistical comparisons, paired samples t tests, analysis of variance (ANOVA), and post-hoc Tukey tests were used at the P <0.05 level. RESULTS: Both treatment groups showed statistically significant changes in the sagittal (pitch) measurements of natural head position and upper pharynx, aerial, and total area of airway measurements during the treatment period. In the control group, the only statistically significant change was an increased upper pharynx measurement (P = 0.020). According to the intergroup comparisons, statistically significant natural head position differences were found in the conventional (6.4° flexion) and the modified (5.7° flexion) facemask groups when compared with the controls. The modified facemask group also showed significant changes in aerial (P = 0.003) and total (P <0.001) areas of the airway measurements compared with the control group. No statistically significant differences were observed between the 2 treatment groups. CONCLUSIONS: These findings suggest that modified and conventional facemask therapy with expansion have significant cranial flexion effects on the dynamic measurements of natural head position. Additionally, the modified facemask procedure showed significant effects on the orofacial airway dimensions compared with the initial values and the values of the untreated controls. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/22051500/Effects_of_modified_and_conventional_facemask_therapies_with_expansion_on_dynamic_measurement_of_natural_head_position_in_Class_III_patients_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(11)00634-2 DB - PRIME DP - Unbound Medicine ER -