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Register a new userAstudy of the effect of Sagital malocclusion at Class I and Class III on Facial Asymmetry at the Frontal Plane for a Sample of Patients Using Computed Tomography (CT)
دراسة تأثير سوء الإطباق في الصنف الأول و الثالث الهيكلي على اللاتناظر الوجهي في المستوى الجبهي لدى عينة مرضى باستخدام التصوير الطبقي المحوري CT
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Aِl-Baath University ورقة بحثية
Publication date
2016
fields
Dentistry
and research's language is
العربية
Created by
Shamra Editor
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ان عدم تناظر الوجه شائع بين البشر لذلك زادت نسبة الاهتمام به و ظهرت طرق مختلفة لتقييم عدم التناظر و يعتبر التصوير الطبقي المحوسب من الطرق الدقيقة التي تمكن الطبيب الفاحص من قراءة جيدة للوجه بالمستويات الثلاثة, و يستخدم حاليا على نطاق واسع للحصول على معلومات ثلاثية الأبعاد على المركب القحفي الفكي من خلال تطوير تقنيات و برامج حاسوبية تتيح بسهولة دراسة دقيقة للوجه و الفكين. يهدف هذا البحث الى ايجاد العلاقة بين اللاتناظر الوجهي و انماط سوء الإطباق (صنف اول . صنف ثالث) بتقنية التصوير ثلاثي الأبعاد CT.
The asymmetric face is common so that increased interest in it . there are different ways to assess the asymmetry. Computed tomography is an accurate way that enable the examiner for reading the face at three planes ,and present three-dimensional information on the cranial mandibular Complex whereas (3D) analysis is essential for making a precise diagnosis of craniofacial morphology . Aim : This research aims to study the asymmetric at the facial patterns malocclusion (class I. Class III) using CT .
References used
Edler R, Wertheim D, Greenhill D. Clinical and computerized assessment of mandibular asymmetry. EurJ Orthod 2001; 23(5):485-94
Haraguchi S, Iguchi Y, Takada K. Asymmetry of the Face in Orthodontic Patients. Angle Orthod 2008;78(3):421-426
Lee MS, Chung DH, Lee JW, Cha KS. Assessing softtissuecharacteristics of facial asymmetry with photographs. AmJ Orthod Dentofacial Orthop 2010 ;138(1):23-31
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The asymmetric face is common so that increased interest in it .there are different ways to
assess the asymmetry. Computed tomography is an accurate way that enable the examiner for
reading the face at three planes ,and present three-dimensional in
formation on the cranial
mandibular Complex whereas (3D) analysis is essential for making a precise diagnosis of
craniofacial morphology. Aim : This research aims to study the asymmetric at the facial patterns
malocclusion (class I. Class II) using CT . the research sample consists of 48 CT image (male 23
and female 15)their ages ranged between 18 and 35 years old and did not receive any orthodontic
treatment before, and devided into two groups according to the malocclusion ptterns(17 class II, 31
class I ) . Analysis was performed T. student test then calculated for all the data obtained . This
study showed that a significant difference between the class I and class II malocclusion in each of
the right and left.
Class II malocclusion is a common clinical problem among white Caucasian population and its transverse component is a critical aspect of a functional and stable occlusion. The size and shape of the arches have considerable implications in orthodontic
diagnosis and treatment planning, affecting the space available, dental esthetics, and stability of the dentition. Hence , it is important to study the alveolar arch width in this group of patients using the wide possibilities of cone beam computed tomography of evaluating real anatomy , true-to-scale images without distortions or superimpositions, and the selection of the desired sections.Objective:To evaluate the width of maxillary and mandibular alveolar arches in skelatal Class II adults compared to skeletal class I using cone beam computed tomography. Materials and methods: thirty-two subjects with skeletal Class II relationship and 10 subjects with skeletal Class I who were ordinary undergoing CBCT scan for non-orthodontics nor for otorihnolaryngology purpose were selected to measure the maxillary and mandibular alveolar width of first premolar and first molars.Independent samples’ t-test was calculated. Results:No statistically significant differences were found of alveolar widths between skeletal Class II and Class I subjects in both maxillary and mandibular widths of molar and premolar regions. Gender had no statistically significant effect in the results of the study. Conclusion :There is no differences in alveolar width between adults with skeletal Class II and Class I relationships, so the transverse discrepancy in skeletal Class II when exsists , it is more probably not originated from the alveolar base.
The aim of the study was to evaluate The relation between frontonasal complex and cases with class I, II, III Malooclousion. Material and methods: True lateral cephalometric radiograph of the sample that comprises 61 patienta of 34 females and 27 ma
les aged 18-25 years.The data were analyzed using independent sample Student t-test, Anova analysis and Pearson correlation analysis. The results showed that significant differences between the value of front complsx and frontonasal angle and different malooclusion classes, but there were no significant differences between male and female according to frontal convex and frontonasal angle, However, the differences between classes according to frontal convex and frontonasal angle were found in females.
Many of researchers concerned jaws bases dimensions because of it's a part of
craniofacial complex , its influence on the facial aestheticand functional portions .Though
these dimensions were studied by Björk the width of the jaws bases in the diff
erent planes,
its relation with craniofacial growth and development had been not studied . Aim: The
aim of this study is to investigate the relationship of the length and width of the jaws in
the frontal plane with Facial Growth Type in adults using Cone-Beam Computed
Tomography scan (CBCT).
Materials and methods: 33 adult patients (22 female, 11 male) with no prior
orthodontic treatment were selected with age average 16 - 27 years ( mean age of 20.02
years, females average age was 20.15 years ; males average age was 21.84 years ) of age ,
were ordinary undergoing CBCT scan for non-orthodontics purpose. Cephalometric
measurements determining facial growth type were performed according to
Jarabak'sanalysis. Pearson's Correlation Coefficient was calculated to investigate the
relationship between the CBCT jaws measurements and facial growth type according to
Jarabak's analysis.
Results :CBCT measurements of jaws' dimensions in the frontal plane showed no
statistical significant differences.
Conclusion:There is no relationship between jaws bases' dimensions in the frontal
plane and facial growth pattern in adults orthodontic ally non-treated subjects.
Dental anomalies are congenital defected teeth which have a certain prevalence
in various malocclusions. the aim of this study was to determine the prevalence of different dental
anomalies in Class I malocclusion patients seeking orthodontic treatment.
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