P Mayoral Sanz1, M Garcia Reyes2, A Bataller Torras2, J A Cabrera Castillo2, M O Lagravère Vich3. 1. Master Program Dental Sleep Medicine, Catholic University of Murcia UCAM, Conde de Peñalver 61, 28006, Madrid, Spain. 2. Faculty of Engineering, University of Malaga, Flauta Mágica 22, 29006, Málaga, Spain. 3. Faculty of Medicine and Dentistry, School of Dentistry, University of Alberta ECHA, 5-524, 11405-87 Avenue, Edmonton, AB, T6G 1C9, Canada. manuel@ualberta.ca.
Abstract
BACKGROUND: The mandibular opening path movements have different directions according to the craniofacial morphology of the patient but always downward and backward, therefore increasing the collapse of the upper airway. The aim of this work is to determine if there is a relationship between the craniofacial morphology and the mandibular movement to help understand the impact on the mandibular position. METHODS: 52 students with full permanent dentition aged 19 to 23 years (mean 21.3 SD 1.7; 29 females and 23 males), participated in the study. Each subject had a lateral cephalometric radiograph taken. The opening angle was determined for two levels of vertical openings at 5 and 10 mm. RESULTS: The opening angle showed a greater variability between subjects ranging from 63.15 to 77.08 for 5 mm angle and from for 61.65 to 75.72 for the 10 mm angle. Differences of facial phenotypes was evident when comparing the individual dissoccluding angle of the low angle horizontal pattern and high angle vertical pattern. CONCLUSIONS: The opening angle is related to craniofacial morphology with higher vertical anterior and shorter anteroposterior faces having a more horizontal path of mandibular movement than shorter vertical anterior and longer anteroposterior subjects who have a more vertical path.
BACKGROUND: The mandibular opening path movements have different directions according to the craniofacial morphology of the patient but always downward and backward, therefore increasing the collapse of the upper airway. The aim of this work is to determine if there is a relationship between the craniofacial morphology and the mandibular movement to help understand the impact on the mandibular position. METHODS: 52 students with full permanent dentition aged 19 to 23 years (mean 21.3 SD 1.7; 29 females and 23 males), participated in the study. Each subject had a lateral cephalometric radiograph taken. The opening angle was determined for two levels of vertical openings at 5 and 10 mm. RESULTS: The opening angle showed a greater variability between subjects ranging from 63.15 to 77.08 for 5 mm angle and from for 61.65 to 75.72 for the 10 mm angle. Differences of facial phenotypes was evident when comparing the individual dissoccluding angle of the low angle horizontal pattern and high angle vertical pattern. CONCLUSIONS: The opening angle is related to craniofacial morphology with higher vertical anterior and shorter anteroposterior faces having a more horizontal path of mandibular movement than shorter vertical anterior and longer anteroposterior subjects who have a more vertical path.
Authors: Francesca Milano; Maria Celeste Billi; Francesca Marra; Giovanni Sorrenti; Antonio Gracco; Giulio A Bonetti Journal: Int Orthod Date: 2013-07-15
Authors: Kate Sutherland; Olivier M Vanderveken; Hiroko Tsuda; Marie Marklund; Frederic Gagnadoux; Clete A Kushida; Peter A Cistulli Journal: J Clin Sleep Med Date: 2014-02-15 Impact factor: 4.062