Evaluation of vertical mandibular asymmetry in unilateral and bilateral posterior crossbite adult patients

2015 ◽  
Vol 3 (2) ◽  
pp. 124
Author(s):  
Amjad Al Taki ◽  
Omar Othman ◽  
Fatma Al Kaddah
Keyword(s):  
Adult Patients ◽  
Posterior Crossbite ◽  
Mandibular Asymmetry

scholarly journals PREVALENCE OF MANDIBULAR ASYMMETRY IN SKELETAL CLASS I ADULT PATIENTS

2014 ◽  
Vol 2 (2) ◽  
pp. 189 ◽  
Author(s):  
Bruno Frazão Gribel ◽  
Guilherme Thiesen ◽  
Tássia Silvana Borges ◽  
Maria Perpétua Mota Freitas
Keyword(s):  
Computed Tomography ◽  
Calculation Method ◽  
Significant Error ◽  
Adult Patients ◽  
Class I ◽  
Cone Beam ◽  
Skeletal Class ◽  
Mandibular Asymmetry ◽  
Computed Tomography Images ◽  
Significant Difference

AIM: The objective of this study was evaluating the prevalence of mandibular asymmetry in skeletal Class I adult patients. MATERIALS AND METHODS: The sample was composed by cone-beam computed tomography images of 250 skeletal Class I patients with age from 18 to 70 years old. The side deviation of mandibular asymmetry was evaluated (right and left), as well as the intensity of this asymmetry. People with gnathic deviation until 2mm were considered as patients with slight asymmetry; deviation between 2 and 5mm was considered moderate asymmetry and those higher than 5mm as severe asymmetries. The error calculation method was performed and there was not significant error in the measurements. To verify the association between the prevalence of mandibular asymmetry and the gender of individuals, the Χ2 was carried out and the significant level adopted was 5% (p<0.05). RESULTS: The results showed that mandibular deviation occurred more frequently to the left side in both genders (male 56.5% e female 58.2%), without statistically significant difference between them (p=0.792). Besides, the prevalence of slight, moderate and severe asymmetries were, respectively 61%, 27% and 12% for males and 54%, 28% and 18% for female; and there was not statistically significant difference (p=0.366) between the gender of the sample evaluated. CONCLUSION: In this study, both deviation and intensity of mandibular asymmetry did not present preference regarding to the gender.

scholarly journals Evaluation of structural skeletal asymmetry of the glenoid fossa in adult patients with unilateral posterior crossbite using surface-to-surface matching on CBCT images

2020 ◽  
Vol 90 (3) ◽  
pp. 376-382 ◽  
Author(s):  
Simone Muraglie ◽  
Rosalia Leonardi ◽  
Khaled Aboulazm ◽  
Chiara Stumpo ◽  
Carla Loreto ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Reference Points ◽  
Adult Patients ◽  
Glenoid Fossa ◽  
Maxillary Expansion ◽  
Articular Eminence ◽  
Posterior Crossbite ◽  
Three Dimensional Models ◽  
Skeletal Asymmetry ◽  
Two Sides

ABSTRACT Objectives To compare, using surface-to-surface (StS) matching, any shape differences between the crossbite and noncrossbite side of the glenoid fossa and articular eminence in adult patients affected by posterior unilateral crossbite (PUXB) and compare them with unaffected controls. Materials and Methods 32 cone beam computed tomography (CBCT) scans of patients (mean age: 23.72 ± 3.74 years) undergoing surgical maxillary expansion were analyzed to obtain three-dimensional models of the left and right glenoid fossae that were superimposed using stable anatomical reference points and then compared using StS matching to evaluate the presence of any shape differences. These findings were compared with those obtained from 16 CBCT scans of unaffected controls (mean age: 23.72 ± 3.73 years). Results A mean difference of &gt;11% was found between the study group and controls when comparing the matching percentages of the two sides of the glenoid fossa and articular eminence at all three levels of tolerance selected for this study. These differences were found to be highly statistically significant (P ≤ .0001). Conclusions According to the shape analysis findings, adult PUXB patients exhibit a higher degree of glenoid fossa and articular eminence shape differences compared to unaffected controls.

scholarly journals Mandibular asymmetry: A proposal of radiographic analysis with public domain software

2014 ◽  
Vol 19 (3) ◽  
pp. 52-58 ◽  
Author(s):  
Alexandre Durval Lemos ◽  
Cintia Regina Tornisiello Katz ◽  
Mônica Vilela Heimer ◽  
Aronita Rosenblatt
Keyword(s):  
Public Domain ◽  
Diagnostic Methods ◽  
Linear Measurements ◽  
Distortion Factor ◽  
Panoramic Radiographs ◽  
Posterior Crossbite ◽  
Mandibular Asymmetry ◽  
Normal Occlusion ◽  
Public Domain Software ◽  
The Right

OBJECTIVE: This preliminary study aimed to propose a new analysis of digital panoramic radiographs for a differential diagnosis between functional and morphological mandibular asymmetry in children with and without unilateral posterior crossbite. METHODS: Analysis is based on linear and angular measurements taken from nine anatomic points, demarcated in sequence directly on digital images. A specific plug-in was developed as part of a larger public domain image processing software (ImageJ) to automate and facilitate measurements. Since panoramic radiographs are typically subject to magnification differences between the right and left sides, horizontal linear measurements were adjusted for greater accuracy in both sides by means of a Distortion Factor (DF). In order to provide a preliminary assessment of proposed analysis and the developed plug-in, radiographs of ten patients (5 with unilateral posterior crossbite and 5 with normal occlusion) were analyzed. RESULTS: Considerable divergence was found between the right and left sides in the measurements of mandibular length and position of condyles in patients with unilateral posterior crossbite in comparison to individuals with normal occlusion. CONCLUSION: Although there are more effective and accurate diagnostic methods, panoramic radiography is still widespread, especially in emerging countries. This study presented initial evidence that the proposed analysis can be an important resource for planning early orthodontic intervention and, thus, avoid progression of asymmetries and their consequences.

Effect of unilateral posterior crossbite and unilateral cleft lip and palate on vertical mandibular asymmetry

2013 ◽  
Vol 183 (3) ◽  
pp. 357-362 ◽  
Author(s):  
L. Abad-Santamaría ◽  
A. López-de-Andrés ◽  
I. Jiménez-Trujillo ◽  
C. Ruíz ◽  
M. Romero
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Posterior Crossbite ◽  
Mandibular Asymmetry

scholarly journals Orthodontic-surgical treatment of class III malocclusion with mandibular asymmetry

2011 ◽  
Vol 22 (2) ◽  
pp. 151-156 ◽  
Author(s):  
Ana Zilda Nazar Bergamo ◽  
Marcela Cristina Damião Andrucioli ◽  
Fábio Lourenço Romano ◽  
José Tarcísio Lima Ferreira ◽  
Mírian Aiko Nakane Matsumoto
Keyword(s):  
Orthognathic Surgery ◽  
Facial Asymmetry ◽  
Open Bite ◽  
Class Iii ◽  
Posterior Crossbite ◽  
Mandibular Asymmetry ◽  
Skeletal Malocclusion ◽  
Facial Esthetics ◽  
The Face ◽  
Maxillary Deficiency

Class III skeletal malocclusion may present several etiologies, among which maxillary deficiency is the most frequent. Bone discrepancy may have an unfavorable impact on esthetics, which is frequently aggravated by the presence of accentuated facial asymmetries. This type of malocclusion is usually treated with association of Orthodontics and orthognathic surgery for correction of occlusion and facial esthetics. This report presents the treatment of a patient aged 15 years and 1 month with Class III skeletal malocclusion, having narrow maxilla, posterior open bite on the left side, anterior crossbite and unilateral posterior crossbite, accentuated negative dentoalveolar discrepancy in the maxillary arch, and maxillary and mandibular midline shift. Clinical examination also revealed maxillary hypoplasia, increased lower one third of the face, concave bone and facial profiles and facial asymmetry with mandibular deviation to the left side. The treatment was performed in three phases: presurgical orthodontic preparation, orthognathic surgery and orthodontic finishing. In reviewing the patient's final records, the major goals set at the beginning of treatment were successfully achieved, providing the patient with adequate masticatory function and pleasant facial esthetics.

An evaluation of mandibular asymmetry in adults with unilateral posterior crossbite

1995 ◽  
Vol 107 (4) ◽  
pp. 394-400 ◽  
Author(s):  
Brian L. O'Byrn ◽  
Cyril Sadowsky ◽  
Bernard Schneider ◽  
Ellen A. BeGole
Keyword(s):  
Posterior Crossbite ◽  
Mandibular Asymmetry
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