Does Maxillary Advancement Alter Vocal Acoustic Parameters in Class III Skeletal Patients?

2021 ◽  
Author(s):  
Majid Neamati ◽  
Mehran Jamali ◽  
Reza Tabrizi ◽  
Behrouz Barati
Keyword(s):  
Class Iii ◽  
Acoustic Parameters ◽  
Maxillary Advancement

scholarly journals Effect of Le Fort I Maxillary Advancement and Clockwise Rotation on the Anteromedial Cheek Soft Tissue Change in Patients with Skeletal Class III Pattern and Midface Deficiency: A 3D Imaging-Based Prediction Study

2020 ◽  
Vol 9 (1) ◽  
pp. 262
Author(s):  
Hsin-Chih Lai ◽  
Rafael Denadai ◽  
Cheng-Ting Ho ◽  
Hsiu-Hsia Lin ◽  
Lun-Jou Lo
Keyword(s):  
Soft Tissue ◽  
Orthognathic Surgery ◽  
Class Iii ◽  
Le Fort ◽  
Skeletal Class ◽  
Tissue Change ◽  
Maxillary Advancement ◽  
Soft Tissue Change ◽  
Mass Position ◽  
Le Fort I

Patients with a skeletal Class III deformity may present with a concave contour of the anteromedial cheek region. Le Fort I maxillary advancement and rotational movements correct the problem but information on the impact on the anteromedial cheek soft tissue change has been insufficient to date. This three-dimensional (3D) imaging-assisted study assessed the effect of surgical maxillary advancement and clockwise rotational movements on the anteromedial cheek soft tissue change. Two-week preoperative and 6-month postoperative cone-beam computed tomography scans were obtained from 48 consecutive patients who received 3D-guided two-jaw orthognathic surgery for the correction of Class III malocclusion associated with a midface deficiency and concave facial profile. Postoperative 3D facial bone and soft tissue models were superimposed on the corresponding preoperative models. The region of interest at the anteromedial cheek area was defined. The 3D cheek volumetric change (mm3; postoperative minus preoperative models) and the preoperative surface area (mm2) were computed to estimate the average sagittal movement (mm). The 3D cheek mass position from orthognathic surgery-treated patients was compared with published 3D normative data. Surgical maxillary advancement (all p < 0.001) and maxillary rotation (all p < 0.006) had a significant effect on the 3D anteromedial cheek soft tissue change. In total, 78.9%, 78.8%, and 78.8% of the variation in the cheek soft tissue sagittal movement was explained by the variation in the maxillary advancement and rotation movements for the right, left, and total cheek regions, respectively. The multiple linear regression models defined ratio values (relationship) between the 3D cheek soft tissue sagittal movement and maxillary bone advancement and rotational movements of 0.627 and 0.070, respectively. Maxillary advancements of 3–4 mm and >4 mm resulted in a 3D cheek mass position (1.91 ± 0.53 mm and 2.36 ± 0.72 mm, respectively) similar (all p > 0.05) to the 3D norm value (2.15 ± 1.2 mm). This study showed that both Le Fort I maxillary advancement and rotational movements affect the anteromedial cheek soft tissue change, with the maxillary advancement movement presenting a larger effect on the cheek soft tissue movement than the maxillary rotational movement. These findings can be applied in future multidisciplinary-based decision-making processes for planning and executing orthognathic surgery.

Middle and Lower Facial Soft Tissue Changes after Maxillary Advancement through Conventional or High Le Fort I Osteotomy: A Case Series Study

2019 ◽  
Author(s):  
Ramin Foroughi ◽  
Oveis Khakbaz ◽  
Mehrdad Maneshi
Keyword(s):  
Case Series ◽  
Mean Difference ◽  
Class Iii ◽  
Le Fort I Osteotomy ◽  
Le Fort ◽  
Maxillary Advancement ◽  
Tissue Changes ◽  
Group 2 ◽  
Le Fort I ◽  
Group 1

Introduction Maxillary advancementis applied extensively for malocclusion class III correction.This procedure is done using one of the two methods, Conventional or High. Maxilla moves in both vertical and horizontal and only in the horizontal directions in Conventional and High method respectively, so expecting a difference in facialsoft tissue changes. In present study is a case series that describes this issue. Materials and Methods: The cases included 30 patients with class III malocclusion due to maxillary deficiency, whom underwent Le Fort I osteotomy for maxillary advancement in Shahid Beheshti Hospital in Babol, Iran during 1995 to 1995. According to surgical technique, the cases were placed in group 1 (Conventional) or group 2 (High). Maxillary advancement and changes in hard and soft tissue of the middle and lower facial regions where measured through tracing on the lateral cephalometry. Intra-group and inter-group statistical comparisons were done using SPSS20 software at significance level as 0.05. Result: The pre-surgical mean size of SNA, SNB, nasolabial and mentolabial angles was similar in two groups. In all patients, after surgery, SNA angle size was increased and SNB، nasolabial and Mentolabial angles size were decreased. The mean value of these change was similar in two groups. In group 2, the displacement of point A ‘(mean difference: 1.30 mm) and Labrale Superius (mean difference: 1.40 mm) were significantly more than group 1. The amount of displacement of SN (mean difference: 1.30 mm), Labrale Inferius (mean difference: 0.88 mm) and Pogonion (mean difference: 0.23 mm) points in group 2 was higher than that of group 1, but this difference was not statistically significant. Conclusion: It is needed strong evidence for decision about selecting High or Conventional approach maxillary advancement in terms of facial aesthetic aspects. So, further studies with larger sample sizes and cohort or quasi-experimental design is suggested

scholarly journals Volumetric and cephalometric evaluation of the upper airway of class III patients submitted to maxillary advancement

2016 ◽  
Vol 45 (6) ◽  
pp. 356-361
Author(s):  
Thais Mazeu SANTIAGO ◽  
Lucas Borin MOURA ◽  
Marisa Aparecida Cabrini GABRIELLI ◽  
Rubens SPIN-NETO ◽  
Valfrido Antonio PEREIRA-FILHO
Keyword(s):  
Medical Records ◽  
Upper Airway ◽  
Cone Beam ◽  
Class Iii ◽  
Maxillary Advancement ◽  
Cone Beam Tomography ◽  
Maxillary Deficiency ◽  
Transversal Study ◽  
Airway Dimensions ◽  
Area And Volume

Abstract Introduction Anteroposterior maxillary deficiency can be associated with a decrease of upper airway volume. Maxillary advancement can improve the upper airway space. Aim To correlate cephalometric (2D) and volumetric (3D) measurements of the upper airway in class III patients treated by maxillary advancement. Material and method This retrospective transversal study was performed in ten adult patients submitted to maxillary advancement for correction of class III deformity secondary to maxillary anteroposterior deficiency. The Cone beam tomography files included in the medical records were used: (T1) pre-operative and (T2) 6 to 8 months postoperative. The DICOM files were imported and reconstructed for volumetric and cephalometric evaluation of the upper airway, as divided into nasopharynx, oropharynx and hypopharynx (Arnett & Gunson FAB Surgery). Result Age ranged from 26 to 55 years with a mean of 36.3±9.2 years. There were no statistically significant differences for cephalometric and volumetric parameters of the three pharyngeal regions between T1 and T2 periods. This was due to the small amount of maxillary advancement necessary to correct the maxillary deformity in the studied patients (4.7±1.89mm). The correlation between area and volume was not statistically significant only for preoperative measurements of the nasopharynx (r=0.30, p=0.40). It was significant for the other regions and evaluation periods (p<0.05). Conclusion Small maxillary advancements do not result in significant increases in airway dimensions.

scholarly journals Class III Treatment with Skeletal and Dental Anchorage: A Review of Comparative Effects

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Roberta Clemente ◽  
Luca Contardo ◽  
Christian Greco ◽  
Roberto Di Lenarda ◽  
Giuseppe Perinetti
Keyword(s):  
Skeletal Anchorage ◽  
Class Iii ◽  
Control Groups ◽  
Facial Mask ◽  
Maxillary Protraction ◽  
Maxillary Advancement ◽  
Almost All ◽  
And Control ◽  
Class Iii Treatment

Objectives. This review addresses the comparative effects of skeletal anchored maxillary protraction (MP) versus dental anchored MP. Materials and Methods. The studies retrieved had to have both test and control groups treated by the use of a facemask with or without the use of skeletal anchorage though either (palatal/buccal) maxillary or mandibular miniscrews/miniplates, respectively. Results. Nine articles were included. Dentoalveolar changes were seen in all the studies. In particular, a significant proclination of the upper incisors was documented in the group treated with a dental anchorage facial mask, as compared to that treated with skeletal anchorage. Comparing the two methods, almost all the studies indicated a greater maxillary advancement in the group treated with skeletal anchorage. Conclusions. Therapies with skeletal anchorage produce greater maxillary protraction, reducing undesirable dental effects.

scholarly journals Changes in smile morphometric indices following maxillary advancement and mandibular setback surgery in skeletal Class III patients

2019 ◽  
Vol 18 (2) ◽  
pp. 216-221
Author(s):  
Fahimeh Farzanegan ◽  
Farzin Hearvi ◽  
Mandana Karrari ◽  
Hooman Shafaee ◽  
Touraj Vaezi ◽  
...  
Keyword(s):  
Medical Science ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Lower Incisor ◽  
Skeletal Class ◽  
Mandibular Setback ◽  
Post Surgery ◽  
Maxillary Advancement ◽  
Significant Difference ◽  
Mandibular Setback Surgery

Objectives: The aim of this study was to evaluate the changes in smile morphometric indices following maxillary advancement and mandibular setback surgery in patients with skeletal class III malocclusion. Materials and Methods: Smile morphometric indices were measured on frontal rest and smile photographs of 15 female patients with skeletal Class III malocclusions before and three months after maxillary advancement and mandibular setback surgery. Pre- and post-surgery measurements were compared. Results: The amount of left and right commissural height, philtrum height, and maximum upper incisor show at rest did not change significantly three months after surgery (p>0.05). The amount of maximum upper and lower incisor show, interlabial gap, smile width and index, buccal corridor ratio, gingival display, and smile arc on the frontal smile photographs didn’t showstatistically significant difference before and after surgery (P>0.05). Conclusion: Orthognathic surgery in patients with skeletal Class III malocclusion had no significant effect on rest and smile parameters from the frontal view. Bangladesh Journal of Medical Science Vol.18(2) 2019 p.216-221

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