1
|
Li G, Chen Z, Li Y, Cai G, Ruan X, Wang T, Guan Z, Sun L, Wang W, Sun W, Wang H. Correlation between oral cavity volume and upper airway changes in skeletal Class III patients undergoing bimaxillary orthognathic surgery: a pilot cone-beam computed tomography study. Angle Orthod 2024; 94:432-440. [PMID: 39229952 PMCID: PMC11210515 DOI: 10.2319/112223-774.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 02/01/2024] [Indexed: 09/05/2024] Open
Abstract
OBJECTIVES To evaluate changes of the upper airway and oral cavity volumes in patients with skeletal Class III malocclusion undergoing bimaxillary orthognathic surgery, and to analyze the correlation between postoperative upper airway decrease and the amount of jaw movement and oral cavity volume reduction. MATERIALS AND METHODS Thirty patients (16 males and 14 females) undergoing bimaxillary surgery were included. Three-dimensional reconstruction of the upper airway and oral cavity were performed using preoperative (T0) and postoperative (T1) (6 months) cone-beam computed tomography scans. RESULTS The volume, sagittal area and minimum cross-sectional area of the upper airway were diminished (P < .001). The decrease in volume and minimum cross-sectional area in the oropharyngeal region of the upper airway were weakly correlated with B-point posterior movement (P < .05). Total oral cavity volume was decreased, with maxillary oral volume increasing and mandibular oral volume decreasing (P < .001). Upper airway decrease was highly correlated with total oral volume reduction and mandibular oral volume reduction, with the most significant correlation being with total oral volume reduction (P < .001). CONCLUSIONS Class III bimaxillary surgery reduced the volume, sagittal area, and minimum cross-sectional area of the upper airway as well as oral cavity volume. Upper airway changes were weakly correlated with anterior-posterior mandibular movement but significantly correlated with oral cavity volume changes. Thus, oral cavity volume reduction is a crucial factor of upper airway decrease in patients with skeletal Class III malocclusion undergoing bimaxillary orthognathic surgery.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Hua Wang
- Corresponding author: Dr Hua Wang, Department of Orthodontics, Affiliated Stomatological Hospital of Nanjing Medical University, 136 Hanzhong Road, Nanjing 210029, China. (e-mail: )
| |
Collapse
|
2
|
Sekar MR, Parameswaran R, Rajkumar B, Parameswaran A. Intraoral volume changes in relation to the hard tissue shape changes in asymmetric patients before and after orthognathic surgery - A retrospective CT study. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2024; 125:101629. [PMID: 37699446 DOI: 10.1016/j.jormas.2023.101629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/07/2023] [Accepted: 09/06/2023] [Indexed: 09/14/2023]
Abstract
OBJECTIVES To evaluate Intraoral volume changes in relation to the hard tissue shape changes in asymmetric patients before and after orthognathic surgery and establish a correlation between them. MATERIALS AND METHODS A retrospective study which evaluated 12 asymmetric patients' pre and post-surgical CT records satisfying the inclusion criteria. Borders were defined for the measurement of extraoral, intraoral and tongue volume. The volume assessment was carried out using software from 3D SYSTEMS, Colorado, US, Version 1.0.2.2055. RESULTS Predicting changes in volume between extra-oral, intra-oral spaces and tongue, Linear regression modeling of the data revealed that for every mm3 change in post-surgical extra-oral volume the post-surgical intra-oral volume decreased by 0.684 mm3 and for every mm3 change in post-surgical intra-oral volume, the post-surgical tongue volume increased by 0.728 mm3. CONCLUSIONS Significant decrease in the extra-oral volume, Intra-oral volume and tongue volume was evident after orthognathic surgery in patients with facial asymmetry. This volumetric approach sheds insight into achieving a muscular equilibrium between intraoral and extraoral structures, which would improve orofacial function and enhance facial aesthetics.
Collapse
Affiliation(s)
- Manoj R Sekar
- Former Postgraduate Student, Department of Orthodontics and Dentofacial Orthopedics, Meenakshi Ammal Dental College & Hospital, Meenakshi University (MAHER), Chennai, Tamil Nadu, India
| | - Ratna Parameswaran
- Professor, Department of Orthodontics and Dentofacial Orthopedics, Meenakshi Ammal Dental College & Hospital, Meenakshi University (MAHER), Chennai, Tamil Nadu, India.
| | - Balaji Rajkumar
- Assistant Professor, Department of Orthodontics and Dentofacial Orthopedics, Meenakshi Ammal Dental College & Hospital, Meenakshi University (MAHER), Chennai, Tamil Nadu, India
| | - Anantanarayanan Parameswaran
- Professor, Department of Oral and Maxillofacial surgery, Meenakshi Ammal Dental College & Hospital, Meenakshi University (MAHER), Chennai, Tamil Nadu, India
| |
Collapse
|
3
|
Mladenovic M, Freezer S, Dreyer C, Meade MJ. Influence of second premolar extractions on the volume of the oral cavity proper: a control comparative cone-beam computed tomography volumetric analysis study. Angle Orthod 2024; 94:31-38. [PMID: 38145620 DOI: 10.2319/031023-164.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 07/01/2023] [Indexed: 12/27/2023] Open
Abstract
OBJECTIVES To compare the pre- and postorthodontic treatment volumetric changes of the oral cavity proper (OCP) in extraction and nonextraction patients and to identify influencing variables. MATERIALS AND METHODS Pre- and posttreatment cone-beam computed tomography (CBCT) scans of patients undergoing orthodontic treatment with fixed labial appliances and who satisfied the inclusion criteria were individually landmarked. Linear, angular, and volumetric measurements were determined. Descriptive statistics, repeated measure analyses of variance, correlations, and stepwise regression statistical analyses were applied. RESULTS The CBCT scans of 54 patients who underwent the extraction of second premolars and/or extraction of second primary molars associated with agenic second premolars, and 59 nonextraction patients matched for crowding, were assessed. The mean age for both groups was 15 years. There was a statistically significant increase in the volume of the OCP for both the extraction and nonextraction groups, with the nonextraction group demonstrating a larger increase in the volume of the OCP. Gender, age, changes in mandibular and maxillary arch length, and changes in mandibular and maxillary intermolar width all influenced the change in the OCP volume. CONCLUSIONS The volume of the OCP increased in growing patients with and without the extraction of the second premolars and/or extraction of second primary molars associated with agenic second premolars. Patients who did not have extractions as part of their orthodontic treatment demonstrated a greater overall increase in OCP volume.
Collapse
|
4
|
Tang H, Cui X, Li H, Zheng F, Chen Y, Jiang J. Effects of vertical control on anatomic and aerodynamic characteristics of the oropharyngeal airway during premolar extraction treatment of Class II hyperdivergent nonsevere crowding malocclusion. Am J Orthod Dentofacial Orthop 2023:S0889-5406(23)00256-1. [PMID: 37245126 DOI: 10.1016/j.ajodo.2023.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/01/2023] [Accepted: 05/01/2023] [Indexed: 05/29/2023]
Abstract
INTRODUCTION This study aimed to analyze the effects of premolar extraction treatment with vertical control on changes in the anatomy and aerodynamics of the oropharynx in Class II hyperdivergent malocclusion with nonsevere crowding. METHODS Thirty-nine patients with Class II hyperdivergent malocclusion were enrolled consecutively. All the participants underwent 4 premolar extractions. The high-pull J-hook and mini-implants were used to provide vertical control. Cone-beam computed tomography was performed before and after treatment. The participants were divided into a decreased lower vertical facial height group (n = 23) and an increased lower vertical facial height group (n = 16) on the basis of superimposition. The aerodynamic characteristics, including airway resistance (inspiration, Rin; expiration, Rex) and maximum velocity (inspiration, Vmaxin; expiration, Vmaxex) at inspiration and expiration, were calculated using computational fluid dynamics. Anatomic characteristics, including volume and cross-sectional area (CSAmin), were measured using the Dolphin Imaging software (Dolphin Imaging and Management Solutions, Chatsworth, Calif). RESULTS After treatment, the median volume and CSAmin increased by 2357 mm3 and 43 mm2, respectively, and median Rin and Vmaxex decreased by 0.15 Pa/L/min and 0.24 m×s-1, respectively, in decreased lower vertical facial height group. In contrast, the median CSAmin decreased by 9.5 mm2 in the increased lower vertical facial height group. All the changes were statistically significant (all P <0.05). Significant differences in volume, CSAmin, Rin, and Vmaxex were observed between the 2 groups. CONCLUSIONS Vertical control might improve the anatomic and aerodynamic characteristics of the oropharyngeal airway during premolar extraction treatment of Class II hyperdivergent malocclusion with nonsevere crowding.
Collapse
Affiliation(s)
- Hongyi Tang
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China
| | - Xinyu Cui
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China
| | - Huazhi Li
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China
| | - Fu Zheng
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China
| | - Youchao Chen
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China
| | - Jiuhui Jiang
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China.
| |
Collapse
|
5
|
Aflah KA, Yohana W, Oscandar F. Volumetric measurement of the tongue and oral cavity with cone-beam computed tomography: A systematic review. Imaging Sci Dent 2022; 52:333-342. [PMID: 36605855 PMCID: PMC9807796 DOI: 10.5624/isd.20220067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/29/2022] [Accepted: 07/06/2022] [Indexed: 01/07/2023] Open
Abstract
Purpose The goal of this systematic review was to compare the use of cone-beam computed tomography (CBCT) with that of computed tomography (CT) for volumetric evaluations of the tongue and oral cavity. Materials and Methods A search for articles was conducted in accordance with the Preferred Reporting Items for Systematic Review and Meta-analyses guidelines. The PubMed, Scopus, ScienceDirect, and SAGE Journals databases were searched for articles published between 2011 and 2021. Articles were screened and assessed for eligibility. Screening involved checking for duplication, reading the title and abstract, and reading the full text. Results The initial search retrieved 25,780 articles. Application of the eligibility criteria yielded 16 articles for qualitative analysis. Multiple uses of CBCT were identified. In several studies, researchers assessed the volumetric correlation between tongue and oral cavity volumes, as well as other parameters. Post-treatment volumetric evaluations of the oral cavity were also reported, and the reliability of CBCT was assessed. The use of CT resembled that of CBCT. Conclusion CBCT has been used in the evaluation of tongue and oral cavity volumes to assess correlations between those volumes and with the upper airway. It has also been used for volumetric evaluation after surgical and non-surgical procedures and to assess the relationships between tongue volume, tooth position, occlusion, and body mass index. Participants with obstructive sleep apnea and malocclusion have been evaluated, and the reliability of CBCT has been assessed. In the included studies, CT was utilized for similar purposes as CBCT, but its reliability was not assessed.
Collapse
Affiliation(s)
| | - Winny Yohana
- Department of Oral Biology, Faculty of Dentistry, Universitas Padjadjaran, Bandung, Indonesia
| | - Fahmi Oscandar
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Universitas Padjadjaran, Bandung, Indonesia
| |
Collapse
|
6
|
Soulet S, Sussman RA. Critical Review of the Recent Literature on Organic Byproducts in E-Cigarette Aerosol Emissions. TOXICS 2022; 10:714. [PMID: 36548547 PMCID: PMC9787926 DOI: 10.3390/toxics10120714] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 11/03/2022] [Accepted: 11/14/2022] [Indexed: 06/17/2023]
Abstract
We review the literature on laboratory studies quantifying the production of potentially toxic organic byproducts (carbonyls, carbon monoxide, free radicals and some nontargeted compounds) in e-cigarette (EC) aerosol emissions, focusing on the consistency between their experimental design and a realistic usage of the devices, as determined by the power ranges of an optimal regime fulfilling a thermodynamically efficient process of aerosol generation that avoids overheating and "dry puffs". The majority of the reviewed studies failed in various degrees to comply with this consistency criterion or supplied insufficient information to verify it. Consequently, most of the experimental outcomes and risk assessments are either partially or totally unreliable and/or of various degrees of questionable relevance to end users. Studies testing the devices under reasonable approximation to realistic conditions detected levels of all organic byproducts that are either negligible or orders of magnitude lower than in tobacco smoke. Our review reinforces the pressing need to update and improve current laboratory standards by an appropriate selection of testing parameters and the logistical incorporation of end users in the experimental design.
Collapse
Affiliation(s)
| | - Roberto A. Sussman
- Institute of Nuclear Sciences, National Autonomous University of Mexico, Mexico City 04510, Mexico
| |
Collapse
|
7
|
Al-hammuri K, Gebali F, Thirumarai Chelvan I, Kanan A. Tongue Contour Tracking and Segmentation in Lingual Ultrasound for Speech Recognition: A Review. Diagnostics (Basel) 2022; 12:diagnostics12112811. [PMID: 36428870 PMCID: PMC9689563 DOI: 10.3390/diagnostics12112811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/07/2022] [Accepted: 11/13/2022] [Indexed: 11/18/2022] Open
Abstract
Lingual ultrasound imaging is essential in linguistic research and speech recognition. It has been used widely in different applications as visual feedback to enhance language learning for non-native speakers, study speech-related disorders and remediation, articulation research and analysis, swallowing study, tongue 3D modelling, and silent speech interface. This article provides a comparative analysis and review based on quantitative and qualitative criteria of the two main streams of tongue contour segmentation from ultrasound images. The first stream utilizes traditional computer vision and image processing algorithms for tongue segmentation. The second stream uses machine and deep learning algorithms for tongue segmentation. The results show that tongue tracking using machine learning-based techniques is superior to traditional techniques, considering the performance and algorithm generalization ability. Meanwhile, traditional techniques are helpful for implementing interactive image segmentation to extract valuable features during training and postprocessing. We recommend using a hybrid approach to combine machine learning and traditional techniques to implement a real-time tongue segmentation tool.
Collapse
Affiliation(s)
- Khalid Al-hammuri
- Department of Electrical and Computer Engineering, University of Victoria, Victoria, BC V8W 2Y2, Canada
- Correspondence:
| | - Fayez Gebali
- Department of Electrical and Computer Engineering, University of Victoria, Victoria, BC V8W 2Y2, Canada
| | | | - Awos Kanan
- Department of Computer Engineering, Princess Sumaya University for Technology, Amman 11941, Jordan
| |
Collapse
|
8
|
Raja V, Priyadarshini SR, Moses JA, Anandharamakrishnan C. A dynamic in vitro oral mastication system to study the oral processing behavior of soft foods. Food Funct 2022; 13:10426-10438. [PMID: 36102637 DOI: 10.1039/d2fo00789d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bolus-oriented artificial oral mastication system was developed to simulate the dynamics of food mastication in the human mouth. The system consists of a chewing unit, a bolus forming unit, and provisions for the dynamic incorporation of saliva during mastication. The system performance was validated with in vivo trials (n = 25) considering time-dependent changes in particle size, textural attributes and rheological behavior of the bolus. Idli, a fermented and steamed black gram-rice-based Indian food was considered the model soft food for all trials measured in triplicates. The mastication dynamics were evaluated by analyzing bolus properties during every 3 s of mastication. Large strain shear rheology tests revealed that the viscosity of the sample decreased over time. Results of in vivo trials follow close trends in particle size and rheological behavior and have no significant change in correlation with in vitro mastication results. Similar observations were made in the half softening time of idli during mastication as determined using the relative change in hardness (hardness ratio (Ht/H0)) values fitted to the Weibull model. Also, a model to simulate the time-dependent changes in bolus adhesiveness was developed.
Collapse
Affiliation(s)
- Vijayakumar Raja
- Computational Modeling and Nanoscale Processing Unit, National Institute of Food Technology Entrepreneurship and Management, Thanjavur, Ministry of Food Processing Industries, Government of India, Thanjavur - 613005, Tamil Nadu, India.
| | - S R Priyadarshini
- Computational Modeling and Nanoscale Processing Unit, National Institute of Food Technology Entrepreneurship and Management, Thanjavur, Ministry of Food Processing Industries, Government of India, Thanjavur - 613005, Tamil Nadu, India.
| | - J A Moses
- Computational Modeling and Nanoscale Processing Unit, National Institute of Food Technology Entrepreneurship and Management, Thanjavur, Ministry of Food Processing Industries, Government of India, Thanjavur - 613005, Tamil Nadu, India.
| | - C Anandharamakrishnan
- Computational Modeling and Nanoscale Processing Unit, National Institute of Food Technology Entrepreneurship and Management, Thanjavur, Ministry of Food Processing Industries, Government of India, Thanjavur - 613005, Tamil Nadu, India.
| |
Collapse
|
9
|
A cone beam computed tomography study based on three-dimensional cephalometric analysis of relationships between the lip-line and jaw deformity. Arch Oral Biol 2022; 141:105489. [DOI: 10.1016/j.archoralbio.2022.105489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/16/2022] [Accepted: 06/16/2022] [Indexed: 11/19/2022]
|
10
|
Helbing A, Lee E, Pla R, Heinz E. Utilization of submandibular ultrasound to measure oral cavity changes with interventions in routine airway management. Proc AMIA Symp 2022; 35:20-23. [PMID: 34970025 DOI: 10.1080/08998280.2021.1980318] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Ultrasound is a quick, noninvasive, inexpensive tool that can provide an accurate airway assessment. Tongue thickness, oral cavity height, and their relationship were measured using submandibular ultrasonography with and without oral airway interventions during intubation in 26 patients. The mean tongue thickness to oral cavity height ratio was 0.83 ± 0.03. The percent change of tongue thickness to oral cavity height decreased significantly by 36.47% with an oral airway and by 43.49% with laryngoscope interventions (P < 0.01). This study demonstrates how ultrasound-measured oral cavity ratios change with the placement of airway equipment, and application of these findings may advance our understanding of advanced airway management among diverse patient populations.
Collapse
Affiliation(s)
- Alexandra Helbing
- School of Medicine and Health Sciences, George Washington University, Washington, DC
| | - Esther Lee
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, California
| | - Raymond Pla
- Department of Anesthesiology and Critical Care Medicine, George Washington University Medical Faculty Associates, Washington, DC
| | - Eric Heinz
- Department of Anesthesiology and Critical Care Medicine, George Washington University Medical Faculty Associates, Washington, DC
| |
Collapse
|
11
|
The effect of rapid maxillary expansion on the upper airway's aerodynamic characteristics. BMC Oral Health 2021; 21:123. [PMID: 33731068 PMCID: PMC7968163 DOI: 10.1186/s12903-021-01488-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/04/2021] [Indexed: 12/20/2022] Open
Abstract
Background The effect of rapid maxillary expansion (RME) on the upper airway (UA) has been studied earlier but without a consistent conclusion. This study aims to evaluate the outcome of RME on the UA function in terms of aerodynamic characteristics by applying a computational fluid dynamics (CFD) simulation. Methods This retrospective cohort study consists of seventeen cases with two consecutive CBCT scans obtained before (T0) and after (T1) RME. Patients were divided into two groups with respect to patency of the nasopharyngeal airway as expressed in the adenoidal nasopharyngeal ratio (AN): group 1 was comprised of patients with an AN ratio < 0.6 and group 2 encompassing those with an AN ratio ≥ 0.6. CFD simulation at inspiration and expiration were performed based on the three-dimensional (3D) models of the UA segmented from the CBCT images. The aerodynamic characteristics in terms of pressure drop (ΔP), maximum midsagittal velocity (Vms), and maximum wall shear stress (Pws) were compared by paired t-test and Wilcoxon test according to the normality test at T0 and T1. Results The aerodynamic characteristics in UA revealed no statistically significant difference after RME. The maximum Vms (m/s) decreased from 2.79 to 2.28 at expiration after RME (P = 0.057). Conclusion The aerodynamic characteristics were not significantly changed after RME. Further CFD studies with more cases are warranted.
Collapse
|
12
|
Safi M, Amiri A, Nasrabadi N, Khosravi S. Comparing Outcomes of Airway Changes and Risk of Sleep Apnea after Bimaxillary Orthognathic Surgery and Mandibular Setback Surgery in Patients with Skeletal Class III Malocclusion: A Systematic Review and Meta-Analysis. PESQUISA BRASILEIRA EM ODONTOPEDIATRIA E CLÍNICA INTEGRADA 2021. [DOI: 10.1590/pboci.2021.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|