scholarly journals Craniofacial morphology/phenotypes influence on mandibular range of movement in the design of a mandibular advancement device

2021 ◽  
Author(s):  
Pedro Mayoral Sanz ◽  
Mariano Garcia Reyes ◽  
Alex Bataller Torras ◽  
JA Cabrera Castillo ◽  
Manuel Lagravere
Keyword(s):  
Upper Airway ◽  
Craniofacial Morphology ◽  
Mandibular Advancement ◽  
Opening Angle ◽  
Mandibular Movement ◽  
Range Of Movement ◽  
Cephalometric Radiograph ◽  
Mandibular Position ◽  
The Individual ◽  
The Impact

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.

scholarly journals Craniofacial morphology/phenotypes influence on mandibular range of movement in the design of a mandibular advancement device

2020 ◽  
Author(s):  
Pedro Mayoral Sanz ◽  
Mariano Garcia Reyes ◽  
Alex Bataller Torras ◽  
JA Cabrera Castillo ◽  
Manuel Lagravere
Keyword(s):  
Upper Airway ◽  
Craniofacial Morphology ◽  
Mandibular Advancement ◽  
Opening Angle ◽  
Mandibular Movement ◽  
Range Of Movement ◽  
Cephalometric Radiograph ◽  
Mandibular Position ◽  
The Individual ◽  
The Impact

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.

scholarly journals Craniofacial Morphology/Phenotypes Influence on Mandibular Range of Movement in the Design of a Mandibular Advancement Device

2020 ◽  
Author(s):  
Pedro Mayoral Sanz ◽  
Mariano Garcia Reyes ◽  
Alex Bataller Torras ◽  
JA Cabrera Castillo ◽  
Manuel Lagravere
Keyword(s):  
Upper Airway ◽  
Craniofacial Morphology ◽  
Mandibular Advancement ◽  
Opening Angle ◽  
Mandibular Movement ◽  
Range Of Movement ◽  
Cephalometric Radiograph ◽  
Mandibular Position ◽  
The Individual ◽  
The Impact

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.

scholarly journals Craniofacial morphology/phenotypes influence on mandibular range of movement in the design of a mandibular advancement device

2020 ◽  
Author(s):  
Pedro Mayoral Sanz ◽  
Mariano Garcia Reyes ◽  
Alex Bataller Torras ◽  
JA Cabrera Castillo ◽  
Manuel Lagravere
Keyword(s):  
Upper Airway ◽  
Craniofacial Morphology ◽  
Mandibular Advancement ◽  
Opening Angle ◽  
Mandibular Movement ◽  
Range Of Movement ◽  
Cephalometric Radiograph ◽  
Mandibular Position ◽  
The Individual ◽  
The Impact

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.

scholarly journals Craniofacial morphology/phenotypes influence on mandibular range of movement in the design of a mandibular advancement device

2020 ◽  
Author(s):  
Pedro Mayoral Sanz ◽  
Mariano Garcia Reyes ◽  
Alex Bataller Torras ◽  
JA Cabrera Castillo ◽  
Manuel Lagravere
Keyword(s):  
Upper Airway ◽  
Craniofacial Morphology ◽  
Mandibular Advancement ◽  
Opening Angle ◽  
Mandibular Movement ◽  
Range Of Movement ◽  
Cephalometric Radiograph ◽  
Mandibular Position ◽  
The Individual ◽  
The Impact

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.

scholarly journals Craniofacial morphology/phenotypes influence on mandibular range of movement in the design of a mandibular advancement device

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
P. Mayoral Sanz ◽  
M. Garcia Reyes ◽  
A. Bataller Torras ◽  
J. A. Cabrera Castillo ◽  
M. O. Lagravère Vich
Keyword(s):  
Upper Airway ◽  
Craniofacial Morphology ◽  
Mandibular Advancement ◽  
Opening Angle ◽  
Mandibular Movement ◽  
Range Of Movement ◽  
Cephalometric Radiograph ◽  
Mandibular Position ◽  
The Individual ◽  
The Impact

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.

scholarly journals Changes in head posture, hyoid bone position and airway dimensions after orthognatic surgery

2018 ◽  
Vol 17 ◽  
pp. 1-11
Author(s):  
Wanderson Roberto dos Santos Azevedo ◽  
Christiane Cavalcante Feitoza ◽  
Carlos Sanches Vargas Junior ◽  
Karina Eiras Dela Coleta Pizzol
Keyword(s):  
Postoperative Period ◽  
Orthognathic Surgery ◽  
Hyoid Bone ◽  
Upper Airway ◽  
Mandibular Advancement ◽  
Cervical Region ◽  
Mandibular Movement ◽  
Postural Changes ◽  
Air Space ◽  
Airway Dimensions

Mandibular/bimaxillary advancement surgery is described as a potential means of increasing the oropharyngeal airspace , provided a significant improvement in breathing capacity. Aim: To evaluate postural changes suffered in the positioning of the head and the hyoid bone, dentofacial deformity patients undergoing orthognathic surgery with consequent dimensional changes of oropharyngeal airspace. Methods: We evaluated the archived records of patients with postoperative 6 months minimum, being used as criteria for selecting individuals with dental class II malocclusion and facial Pattern II, jaw or maxilomandibular deficiency, patients undergoing orthodontic-surgical treatment through mandibular advancement or of both bony bases, associated or not to genioplastia. Twenty-eight patients were part of the sample and were evaluated by means of lateral radiographs in lateral standard digitized, in three distinct periods: pre-operative, immediate postoperative period and late postoperative period (minimum 6 months). 12 linear measures and two angular cephalometric analysis were used in this research. Results: With the surgery, there was an average of mandibular advancement 6, 76 mm, while remaining stable in the long-term follow-up period; the hyoid bone moved onward and upward, extending your movement in the post-operative. The cervical region presented minimal movement of the head extension in the immediate post operative with almost total returns the position of the head in the post-operative. The surgical movement of oropharyngeal air space was in the same direction of the mandibular movement, but to a lesser extent (1,88 -2,76 mm). In the post-operative period was a late partial reduction of the diameter of the air space between 34-56% of gain, representing an apparent accommodation of this anatomical region soft tissue. Conclusion: Orthognathic surgery of mandibular advancement or bimaxillary promotes significant changes in aesthetics, in the position of the hyoid bone and upper airway dimensions, getting better quality of life to these patients.

scholarly journals Orthodontic treatment of patients with obstructive sleep apnea syndrome (OSAS)

2019 ◽  
Vol 2 (1) ◽  
pp. 168-176
Author(s):  
Mariana Păcurar ◽  
Eugen Bud ◽  
Silvia Pop ◽  
Manuela Chibelean ◽  
Martha Krisztina
Keyword(s):  
Sleep Apnea Syndrome ◽  
Upper Airway ◽  
Craniofacial Morphology ◽  
Interdisciplinary Treatment ◽  
Mandibular Advancement ◽  
Maxillary Expansion ◽  
Gonial Angle ◽  
Rapid Palatal Expansion ◽  
Anterior Cranial Base ◽  
Obstructive Sleep

AbstractIntroductionThe craniofacial skeleton in the growing child is responsive to changing functional demands and environmental factors. Orthopedic modification of facial bones through the application of constant forces over long periods of time has been a mainstay of orthodontic and dentofacial orthopedic therapy.Aim of the studyThe aim of this study was to evaluate changes in pharyngeal structures after rapid palatal expansion (RPE) and compare them with those after using a removable mandibular advancement device (MAD).Material and methodsIn order to accomplish function we modified the pattern of neuromuscular activity throught mandible forward position.ResultsThis finding shows that maxillary deficiency and mandibular retrognathism have been reportedly linked to OSA as both etiologic factors and sequelae of prolonged mouth breathing during the period of growth, these illustrate the potential interaction between alteration in respiratory function and craniofacial morphology.ConclusionsCraniofacial anatomic defects, including inferior displacement of the hyoid bone, larger gonial angle, smaller anterior cranial base, altered anterior and posterior facial heights, and mandibular deficiency, have been suggested as predisposing factors for upper airway obstruction during sleep. Cephalometry has been used extensively in the fields of orthodontics and anthropology to record craniofacial form. Recently, it has been also suggested that cephalometry could be an adjunctive procedure for assessing craniofacial patterns associated with OSAS.Estimating efficacy of rapid maxillary expansion and mandibular advanced in the treatment of paediatric SDB. This might provide alternatives to primary treatments and/or enhance interdisciplinary treatment planning for the children suffering from OSA. The relationships between maxillofacial malocclusions and upper airway volumes were investigated. Literature studies on the association of upper airway narrowing with dento-skeletal malocclusions have been confirmed by us for the group of patients studied.

scholarly journals The impact of oral appliance therapy with moderate mandibular advancement on obstructive sleep apnea and upper airway volume

2019 ◽  
Vol 24 (3) ◽  
pp. 865-873 ◽  
Author(s):  
Riitta Pahkala ◽  
J. Seppä ◽  
R. Myllykangas ◽  
J. Tervaniemi ◽  
V. M. Vartiainen ◽  
...  
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Upper Airway ◽  
Oral Appliance ◽  
Mandibular Advancement ◽  
Oral Appliance Therapy ◽  
Obstructive Sleep ◽  
The Impact

Effect of Mandibular Position on Upper Airway Collapsibility and Resistance

2005 ◽  
Vol 84 (6) ◽  
pp. 554-558 ◽  
Author(s):  
T. Inazawa ◽  
T. Ayuse ◽  
S. Kurata ◽  
I. Okayasu ◽  
E. Sakamoto ◽  
...  
Keyword(s):  
Airway Pressure ◽  
Upper Airway ◽  
Mandibular Advancement ◽  
Neutral Position ◽  
Airway Patency ◽  
Airway Collapsibility ◽  
Critical Closing Pressure ◽  
Mandibular Position ◽  
Upper Airway Collapsibility ◽  
Closing Pressure

It has been proposed that advancement of the mandible is a useful method for decreasing upper airway collapsibility. We carried out this study to test the hypothesis that mandibular advancement induces changes in upper airway patency during midazolam sedation. To explore its effect, we examined upper airway pressure-flow relationships in each of 4 conditions of mouth position in normal, healthy subjects (n = 9). In the neutral position, Pcrit ( i.e., critical closing pressure, an index of upper airway collapsibility) was −4.2 cm H2O, and upstream resistance (Rua) was 21.2 cm H2O/L/sec. In the centric occlusal position, Pcrit was −7.1 cm H2O, and Rua was 16.6 cm H2O/L/sec. In the incisor position, Pcrit was significantly reduced to −10.7 cm H2O, and Rua was significantly reduced to 14.0 cm H2O/L/sec. Mandibular advancement significantly decreased Pcrit to −13.3 cm H2O, but did not significantly influence Rua (22.1 cm H2O/L/sec). We conclude that the mandibular incisors’ position improved airway patency and decreased resistance during midazolam sedation.

Accent Policy and Accent Modification Enterprises as Potential Indicators of Intercultural Power Relations: A Call for an Updated Research Agenda

2013 ◽  
Vol 3 (1) ◽  
pp. 22-33 ◽  
Author(s):  
Brynne D. Ovalle ◽  
Rahul Chakraborty
Keyword(s):  
International Relations ◽  
Identity Construction ◽  
Social Theory ◽  
Power Relations ◽  
Linguistic Diversity ◽  
Cultural Organization ◽  
Using Data ◽  
The Individual ◽  
The Impact ◽  
The Relationship

This article has two purposes: (a) to examine the relationship between intercultural power relations and the widespread practice of accent discrimination and (b) to underscore the ramifications of accent discrimination both for the individual and for global society as a whole. First, authors review social theory regarding language and group identity construction, and then go on to integrate more current studies linking accent bias to sociocultural variables. Authors discuss three examples of intercultural accent discrimination in order to illustrate how this link manifests itself in the broader context of international relations (i.e., how accent discrimination is generated in situations of unequal power) and, using a review of current research, assess the consequences of accent discrimination for the individual. Finally, the article highlights the impact that linguistic discrimination is having on linguistic diversity globally, partially using data from the United Nations Educational, Scientific and Cultural Organization (UNESCO) and partially by offering a potential context for interpreting the emergence of practices that seek to reduce or modify speaker accents.

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