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Differences in distances between maxillary posterior root apices and the sinus floor according to skeletal pattern.
Am J Orthod Dentofacial Orthop. 2017 Dec; 152(6):811-819.AJ

Abstract

INTRODUCTION

The aim of this study was to evaluate the distances from the maxillary posterior root apices to the inferior wall of the maxillary sinus using cone-beam computed tomography images and the relationships between roots and maxillary sinus according to age, sex, and skeletal pattern.

METHODS

Three-dimensional images of each root were checked, and the distances were measured along the true vertical axis from the apex of the root to the sinus floor in 118 patients (63 male, 55 female) aged 10 to 28 years. Compare-means statistic tests were done to assess the differences between groups classified according to age, sex, and skeletal pattern.

RESULTS

The frequency of root contact with the sinus floor increased from 70% at the second premolar to more than 80% at the buccal roots of the first and second molars. Male and older age (20-28 years) groups had significantly smaller distances or more protrusion of the root into the sinus than female and younger age (10-20 years) groups. The distances were shorter, or there was more protrusion of the root into the sinus in the hyperdivergent, down-canted palatal plane, and large gonial angle groups.

CONCLUSIONS

Male, older age, hyperdivergent skeletal pattern, and large gonial angle groups had significantly closer distances between maxillary root tips and the sinus floor or more protrusion of the roots into the sinus. The intrusion of the maxillary molars in those situations may be difficult and slow because of the pneumatized maxillary sinus.

Authors+Show Affiliations

Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu, Korea.Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu, Korea. Electronic address: parkhs@knu.ac.kr.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29173860

Citation

Ahn, Nguyen-Lan, and Hyo-Sang Park. "Differences in Distances Between Maxillary Posterior Root Apices and the Sinus Floor According to Skeletal Pattern." 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. 152, no. 6, 2017, pp. 811-819.
Ahn NL, Park HS. Differences in distances between maxillary posterior root apices and the sinus floor according to skeletal pattern. Am J Orthod Dentofacial Orthop. 2017;152(6):811-819.
Ahn, N. L., & Park, H. S. (2017). Differences in distances between maxillary posterior root apices and the sinus floor according to skeletal pattern. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 152(6), 811-819. https://doi.org/10.1016/j.ajodo.2017.05.021
Ahn NL, Park HS. Differences in Distances Between Maxillary Posterior Root Apices and the Sinus Floor According to Skeletal Pattern. Am J Orthod Dentofacial Orthop. 2017;152(6):811-819. PubMed PMID: 29173860.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Differences in distances between maxillary posterior root apices and the sinus floor according to skeletal pattern. AU - Ahn,Nguyen-Lan, AU - Park,Hyo-Sang, PY - 2016/12/01/received PY - 2017/05/01/revised PY - 2017/05/01/accepted PY - 2017/11/28/entrez PY - 2017/11/28/pubmed PY - 2017/12/12/medline SP - 811 EP - 819 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 - 152 IS - 6 N2 - INTRODUCTION: The aim of this study was to evaluate the distances from the maxillary posterior root apices to the inferior wall of the maxillary sinus using cone-beam computed tomography images and the relationships between roots and maxillary sinus according to age, sex, and skeletal pattern. METHODS: Three-dimensional images of each root were checked, and the distances were measured along the true vertical axis from the apex of the root to the sinus floor in 118 patients (63 male, 55 female) aged 10 to 28 years. Compare-means statistic tests were done to assess the differences between groups classified according to age, sex, and skeletal pattern. RESULTS: The frequency of root contact with the sinus floor increased from 70% at the second premolar to more than 80% at the buccal roots of the first and second molars. Male and older age (20-28 years) groups had significantly smaller distances or more protrusion of the root into the sinus than female and younger age (10-20 years) groups. The distances were shorter, or there was more protrusion of the root into the sinus in the hyperdivergent, down-canted palatal plane, and large gonial angle groups. CONCLUSIONS: Male, older age, hyperdivergent skeletal pattern, and large gonial angle groups had significantly closer distances between maxillary root tips and the sinus floor or more protrusion of the roots into the sinus. The intrusion of the maxillary molars in those situations may be difficult and slow because of the pneumatized maxillary sinus. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/29173860/Differences_in_distances_between_maxillary_posterior_root_apices_and_the_sinus_floor_according_to_skeletal_pattern_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(17)30619-4 DB - PRIME DP - Unbound Medicine ER -