scholarly journals Evaluation of Mandibular Growth and Symmetry in Child with Congenital Zygomatic-Coronoid Ankylosis

Symmetry ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1634
Author(s):  
Anna Lipowicz ◽  
Wojciech Wolański ◽  
Edyta Kawlewska ◽  
Patrycja Zwolska ◽  
Małgorzata Kulesa-Mrowiecka ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Facial Asymmetry ◽  
Median Plane ◽  
Growth Disorders ◽  
Mandibular Growth ◽  
Stomatognathic System ◽  
Articular Process ◽  
Angular Measurements ◽  
The Right

Ankyloses in the area of the temporomandibular joint (TMJ) are mentioned as a potential etiological factor of mandibular growth disorders and facial asymmetry. The aim of this case study was to evaluate the changes in the mandible of a child with zygomatic-coronoid ankylosis during the first five years of life, in which two adhesion release procedures were performed. The adopted symmetrical approach is based on the assumption of symmetry of the structure of the stomatognathic system in relation to the sagittal median plane. However, the assessment of pathological changes in the structure of the skeletal system was performed using an asymmetrical approach. Computed tomography techniques and a system of computer-aided diagnosis (CAD) were used in the case study. During the child’s growth, linear and angular measurements were made thrice (at the age of 16, 25 and 54 months). The degree of asymmetry was estimated in the measurements made on the right and left sides of the three-dimensional mandible. Unilateral congenital hypoplasia of the articular process and zygomatic-coronoid adhesion caused asymmetrical growth of the mandible in the child along with shortening of the mandibular branch and body on the damaged side and a visible difference in the size of the mandibular angles. Removal of the adhesions during surgical procedures made it possible to reduce the asymmetry of the mandible and catch-up growth, although at the age of five, the mandible was still smaller than the mandible in healthy peers. It was shown that the early adhesion release procedures supported by the CAD analysis enabled the restoration of mandibular symmetry.

scholarly journals Multidisciplinary approach in the treatment of ossifying fibroma: Case report

2020 ◽  
Vol 9 (10) ◽  
pp. e3779108833
Author(s):  
Luara Teixeira Colombo ◽  
Laís Kawamata de Jesus ◽  
Ana Flávia Piquera Santos ◽  
Henrique Hadad ◽  
Everton Pontes Martins ◽  
...  
Keyword(s):  
Bone Lesion ◽  
Facial Asymmetry ◽  
Postoperative Recovery ◽  
Ossifying Fibroma ◽  
Clinical Report ◽  
Total Excision ◽  
Stomatognathic System ◽  
Slow Evolution ◽  
The Right ◽  
And Function

Ossifying fibroma is a type of fibro-bone lesion characterized by asymptomatic volumetric increase, of slow evolution, which can reach large dimensions resulting in facial asymmetry, causing tooth displacement and functional impairment of the stomatognathic system structures. The purpose of this article was to the clinical report a case of a female patient, seen at the University Clinic, with a complaint of a volumetric increase in the right mandibular region with an evolution of approximately 1 (one) year. Before the total excision of the lesion, an incisional biopsy was performed with the diagnosis of ossifying fibroma. Due to the proportions of the lesion, the patient presented dysphagia, which resulted in an anemic condition, requiring normalization of the condition prior to the total excision of the lesion. After 6 months of follow-up, the patient showed significant improvement in the shape and function of the operated region, in addition to the nutritional deficiency. The assessment of the patient's nutritional status is extremely important, should not be neglected, since malnutrition is directly linked to the evolution of the disease, and interferes with postoperative recovery.

scholarly journals An evaluation of panoramic radiograph to assess mandibular asymmetry as compared to posteroanterior cephalogram

2015 ◽  
Vol 5 ◽  
pp. 197-201 ◽  
Author(s):  
Astitva Agrawal ◽  
Dinesh Kumar Bagga ◽  
Poonam Agrawal ◽  
Ravindra Kumar Bhutani
Keyword(s):  
Strong Correlation ◽  
Facial Asymmetry ◽  
Panoramic Radiograph ◽  
Kappa Statistics ◽  
Class Interval ◽  
Mandibular Asymmetry ◽  
Kappa Test ◽  
Coefficient Corrélation ◽  
Angular Measurements ◽  
The Right

Aim and Objectives To assess the reliability of orthopantomograms (OPGs) in detecting facial asymmetry. Materials and Methods The OPGs and posteroanterior cephalograms for 10 patients with facial asymmetry were obtained from the outpatient department of the dental college. These radiographs were traced and analyzed. Six measurements (four linear and two angular measurements) were made on both sides. Asymmetry was defined by subtracting the right and the left side measurements. The differences from OPG were compared to those obtained from posteroanterior cephalograms. The kappa statistics and intra-class correlation coefficient (ICC) were used to calculate the differences. Results The ICC was calculated between OPGs and posteroanterior cephalograms difference measurements. The class interval for all measurements was noted between 0.61 and 0.84. The ICC was 0.7861, which shows strong correlation between the values (P < 0.0005) by probability 10−5, within 95%, coefficient correlation lies between 0.61 and 0.84. Kappa test gives a value of 0.64, which shows strong agreement between the measurements. Conclusion Individually, the measurements from OPGs may not be reliable but the obtained difference between the values of the OPGs and the posteroanterior cephalograms are comparable in nature and show strong correlation and can be used to detect facial asymmetry.

scholarly journals Condylar hypoplasia: Clinical case

2021 ◽  
pp. 124-131
Author(s):  
Agnaldo Plácido da Silva ◽  
Eloá Jessica Mendes dos Santos Plácido ◽  
Walber Moraes
Keyword(s):  
Temporomandibular Joint ◽  
Facial Asymmetry ◽  
Psychological Status ◽  
First Year ◽  
Mandibular Growth ◽  
Condylar Process ◽  
Stomatognathic System ◽  
The Face ◽  
Facial Changes ◽  
First Year Of Life

The formation of the face and the stomatognathic system is complex in nature and involves the development of multiple tissue processes that must unite and fuse in an extremely orderly manner. Disorders in the growth of these tissue processes or in their fusions can result in facial changes. The temporomandibular joint is one of the most complex in the human body, with the condylar process responsible for the expression of mandibular growth. Condylar hypoplasia is characterized by a defective formation of the condylar process that can be congenital or acquired. In the case presented, the patient has facial asymmetry since the first year of life, only on the left side. Thus, professionals working in the region of the temporomandibular joint must have knowledge of the existence and clinical implications for an early diagnosis in order to avoid the development of facial asymmetries, restoring the patient’s function, aesthetics and psychological status.

Rotational occlusion of the vertebral artery caused by transverse process hyperrotation and unilateral apophyseal joint subluxation

1997 ◽  
Vol 86 (6) ◽  
pp. 1031-1035 ◽  
Author(s):  
Tetsuro Kawaguchi ◽  
Shigekiyo Fujita ◽  
Kohkichi Hosoda ◽  
Yuji Shibata ◽  
Masaki Iwakura ◽  
...  
Keyword(s):  
Vertebral Artery ◽  
Three Dimensional ◽  
Head Rotation ◽  
Transverse Process ◽  
Content Type ◽  
X Ray ◽  
Articular Process ◽  
Inner Surface ◽  
The Right ◽  
Anterior Root

✓ The authors describe transverse process hyperrotation and unilateral apophyseal joint subluxation as a novel mechanism of rotational vertebral artery (VA) occlusion. The patient, a 56-year-old man, complained of episodic bilateral blindness when rotating his head more than 90° to the right. Plain cervical x-ray films showed spondylotic osteophytes of the right C4–5 uncovertebral portion. Dynamic angiography revealed right VA occlusion at C4–5 and left VA occlusion at C1–2 with head rotation to the right. It was demonstrated on three-dimensional images constructed from computerized tomography scans that C-4 transverse process hyperrotation compressed the right VA against the apex of the C-5 subluxating superior articular process via the inner surface of the transverse process anterior root (processus costarius) rather than the osteophytes. It is also proposed that the true site of occlusion is different from that observed in angiographic studies.

scholarly journals The three-dimensional morphology of mandible and glenoid fossa as contributing factors to menton deviation in facial asymmetry—retrospective study

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Min-Hee Oh ◽  
Jin-Hyoung Cho
Keyword(s):  
Regression Analysis ◽  
Multiple Regression Analysis ◽  
Explanatory Power ◽  
Three Dimensional ◽  
Mandibular Condyle ◽  
Facial Asymmetry ◽  
Glenoid Fossa ◽  
Neck Length ◽  
3D Morphology ◽  
The Right

Abstract Background The aim of this study is to evaluate whether the three-dimensional (3D) morphology of the mandibular condyle, glenoid fossa, and mandible correlated with menton deviation in facial asymmetry. Subjects and methods Thirty adults (15 males and 15 females; mean age, 23.2 ± 3.8 years) with facial asymmetry were included. Linear, angular, and volumetric measurements of the 3D morphology of the mandibular condyle, glenoid fossa, and mandible were recorded using computed tomography (CT) images. The right/left differences were obtained by subtracting the left value from the right value, and an independent t test was used to compare the differences between the females and males. Multiple regression analysis was performed to identify the correlation between the right/left difference of the 3D morphology and menton deviation. Results The results of the comparative analysis did not show any statistical difference between the females and males (P > .05), so the females and males were combined. Multiple regression analysis for the mandibular condyle, glenoid fossa, and mandible showed that neck length, ramus length, and frontal ramal inclination had positive influences on menton deviation, with 76.5% of explanatory power. The neck length and head volume of the mandibular condyle when only the mandibular condyle was considered, and the ramus length and frontal ramal inclination when only the mandible was considered had positive influence on menton deviation with 69.9% and 68.6% explanatory power, respectively. On the other hand, when only considering glenoid fossa, the glenoid fossa had little effect on menton deviation with 15.7% of explanatory power. Conclusions In facial asymmetry, the right/left differences in mandibular condyle and mandible have more impact on the menton deviation than the right/left differences in glenoid fossa. Trial registration CNUDH, CNUDH-EXP-2017-016. Registered 28 September 2017

Construction of plastic contact deformation maps on ceramics: a case study on aluminum nitride

1996 ◽  
Vol 54 ◽  
pp. 636-637
Author(s):  
D. L. Callahan
Keyword(s):  
Plastic Deformation ◽  
Aluminum Nitride ◽  
Mechanical Response ◽  
Three Dimensional ◽  
Bright Field Image ◽  
Perfectly Plastic ◽  
Contrast Analysis ◽  
Deformation Patterns

Modern polishing, precision machining and microindentation techniques allow the processing and mechanical characterization of ceramics at nanometric scales and within entirely plastic deformation regimes. The mechanical response of most ceramics to such highly constrained contact is not predictable from macroscopic properties and the microstructural deformation patterns have proven difficult to characterize by the application of any individual technique. In this study, TEM techniques of contrast analysis and CBED are combined with stereographic analysis to construct a three-dimensional microstructure deformation map of the surface of a perfectly plastic microindentation on macroscopically brittle aluminum nitride.The bright field image in Figure 1 shows a lg Vickers microindentation contained within a single AlN grain far from any boundaries. High densities of dislocations are evident, particularly near facet edges but are not individually resolvable. The prominent bend contours also indicate the severity of plastic deformation. Figure 2 is a selected area diffraction pattern covering the entire indentation area.

The Calculation of Turbulent Diffusion Coefficients in Aquatic Ecosystems

2019 ◽  
Vol 70 (11) ◽  
pp. 3903-3907
Author(s):  
Galina Marusic ◽  
Valeriu Panaitescu
Keyword(s):  
Transport Equation ◽  
Turbulent Diffusion ◽  
Diffusion Coefficients ◽  
Aquatic Ecosystems ◽  
Specific Area ◽  
Left Bank ◽  
The Right ◽  
Prut River

The paper deals with the issues related to the pollution of aquatic ecosystems. The influence of turbulence on the transport and dispersion of pollutants in the mentioned systems, as well as the calculation of the turbulent diffusion coefficients are studied. A case study on the determination of turbulent diffusion coefficients for some sectors of the Prut River is presented. A new method is proposed for the determination of the turbulent diffusion coefficients in the pollutant transport equation for specific sectors of a river, according to the associated number of P�clet, calculated for each specific area: the left bank, the right bank and the middle of the river.

Paranasal Sinus Mucocele Clinical, imagistic and biochemical aspects

2018 ◽  
Vol 69 (8) ◽  
Author(s):  
Doina Vesa ◽  
Cristian Martu ◽  
Razvan Leata ◽  
Ludmila Lozneanu ◽  
luminita Radulescu ◽  
...  
Keyword(s):  
Facial Asymmetry ◽  
Retrospective Case ◽  
Mri Scans ◽  
The One ◽  
Ethmoid Sinuses ◽  
Retrospective Case Study ◽  
Cellular Components ◽  
Ct And Mri

Paranasal mucoceles are a type of cysts that evolve slowly and are asymptomatic; this poses a difficulty in diagnosing the patient because the symptoms can go unnoticed. The mucocele evolves unpredictably. On the one hand, it can become infected turning into pyoceles and on the other hand, it can invade important regions such as the orbital, cranial or genian regions, creating facial asymmetry. This is a retrospective case study of 37 patients diagnosed with sinus mucoceles, followed up by clinical examination and paraclinical tests such as CT and MRI scans. The biochemical components of the liquid from within the mucocele were analyzed and the following criteria were recorded: NaCl-, Cl-, Na+ and cholesterine as well as cellular components such as mastocytes, macrophages, hematocytes and leucocytes. In all cases, the treatment option was surgery with favorable post-operative and follow-up evaluation. The mucoceles that appeared post-operatively (maxillary and ethmoid sinuses) evolved more rapidly than the mucoceles that were induced byan external injury. Longer follow-up of operated patients permitted a more timely diagnosis of recurrences.

Sign in / Sign up

Export Citation Format

Share Document