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Register a new userThe Relationship of Jaws Bases Width With Different Facial Growth Patterns In The frontal Plane ( CBCT Scan Study )
علاقة عرض القواعد الفكية في المستوى الجبهي مع مختلف نماذج النمو الوجهي ( دراسة بواسطة التصوير الطبقي المحوري المخروطي )
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اهتم الكثير من الباحثين بدراسة أبعاد القواعد الفكية نظرا لكونها جزء من المركب القحفي الوجهي و تأثيرها على النواحي الجمالية و الوظيفية . درست هذه الأبعاد من قبل بيورك , إلا أن عرض القواعد الفكية في المستويات المختلفة و ماله من ارتباط متبادل مع النمو و التطور الذي يحصل في منطقة المركب القحفي الوجهي لم يدرس من قبل، الخيارات الواسعة للتصوير الطبقي المحوري المخروطي فتحت مجالاً واسعاً لدراسة البنى التشريحية دون تغير الأبعاد أو تركب الأخيلة. هدف البحث: تحري العلاقة بين أبعاد القواعد الفكية في المستوى الجبهي مع نموذج النمو الوجهي لدى البالغين غير المعالجين تقويميا باستخدام التصوير الشعاعي الطبقي المحوري المخروطي. مواد و طرق البحث : بلغ عدد أفراد العينة 33 مريض بالغ (22 أنثى و 11 ذكر) ممن لم يخضعوا لمعالجة تقويمية سابقة, تم انتقاؤهم بشكل تلقائي حيث كانوا بصدد إجراء تصوير طبقي محوري مخروطي لأسباب لا تتعلق بمشاكل تقويمية , ثم إجراء دراسة سيفالومترية لتحديد نموذج النمو وفق تحليل جاراباك, و من ثم تحليل معامل ارتباط بيرسون لدراسة العلاقة بين قياسات قواعد الفكين المجراة على صور الطبقي المحوري المخروطي مع نموذج النمو الوجهي وفق تحليل جاراباك . النتائج :لا توجد فروقات ذات دلالة إحصائية في قياسات قواعد الفكين في المستوى الجبهي بين مختلف نماذج النمو الوجهي . الخلاصة :لا توجد علاقة بين أبعاد القواعد الفكية في المستوى الجبهي من جهة و بين نموذج النمو الوجهي من جهة أخرى لدى المرضى البالغين غير المعالجين تقويميا.
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 different 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.
References used
HONG,J.C;MICGAELl,W; DAMIEN,S. Mandibular muscle morphology in children with different vertical facial patterns, A 3-dimensional computed tomography study. American Journal of Orthodontics ,2008,10-133
BJORK, A.Cranial Base Development .American Journal Orthodontics, 1955,27- 76
LEE, R.T. Arch width and form , American Journal of Orthodonticsand Dentofacial Orthopedics, 1999,33-78
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It is generally agreed that growth in palatine results from bone formation at the
palatine sutures and lengthening of the alveolar processes, but the extent to which these
two sites contribute to the depth and length of the hard palate remains unso
lved. Hence,
professionals should use quantitative assessments of the hard palate, which allow more
accuracy in the diagnosis and assessment of this structure.
Aim investigating the relationship between the length and depth of the skeletal hard
palatine with facial growth type in adult subjects using CBCT scan.
The dentoalveolar mechanism, within the dentofacial complex, acts to camouflage the vertical base bone discrepancies resulting in differences in the functional occlusal plane cant (FOPC). Considering this, ensures more stable orthodontic treatment re
sults. This research aims to study the possibility of a relationship between the FOPC (represented by anterior and posterior occlusal planes) and the vertical facial growth patterns (VFGPs) using cone beam computed tomography (CBCT). The research sample consisted of 50 CBCTs (22 males and 28 females) aged 18 to 35 years with no prior orthodontic treatments. Their FOPCs were studied according to the VFGPs. Pearson's correlation coefficient was then calculated for all the data obtained. The study showed that the posterior occlusal plane has a clearer correlation to the VFGPs than to the traditional occlusal plane. The posterior occlusal plane showed a strong correlation with the VFGPs in the female sample.
Facial structures, as well as their functions and correlations, have been extensively
studied to expand the knowledge of craniofacial growth and development and to optimize
growth predictions and proper indications of orthodontic and surgical treat
ments. The
cranial base forms the boundaries of the craniofacial complex . The nasomaxillary
complex is related to the anterior cranial base, whereas the mandible is related to its
posterior portion. Therefore, the shape of the cranial base is an important factor in
establishing the position of the maxilla and mandible. Aim: to investigate the relationship
of cranial base with jaws rotation in adult orthodontically non-treated subjects using Cone-
Beam Computed Tomography (CBCT) scan. Materials and methods: 27 Caucasian adult
patients with no prior orthodontics treatment were selected (16 males, 11 females)
.Cephalometric measurements determining type of jaw rotation were performed according
to Björk's analysis. Pearson's Correlation Coefficient was calculated to investigate the
relationship between the CBCT cranial base measurements and Cephalometric
measurements determining type of jaw rotation . Results: This study reveal vary
correlation between CBCT measurements of cranial base's dimensions and jaws rotation.
Conclusions: There is no relationship between the cranial base morphology and Jaws
rotation in adult orthodontically non-treated subjects.
The research aim for testing the correlations between the morphology of the bone around the apexes of the central incisors and facial type.the sample consist of 59 patient.They were divided into three groups according to their facial Type.the result
is three groups ,19 short face type, 20 norm face type, and 20 long face type patients, aged 19 to 40 years.we have measured many measurement that determine the relationship between the apex of central upper incisor and its surroundings. The measurements were processed using analysis of variance Anova and Mann-Whitney U-tests and (Correlation coefficient )r .We find that at the upper central incisors, In short face type subjects the root apex of the upper central incisors was farther away from the lingual cortex than in the norm face type and long face type. In long face type subjects the root apex of the upper incisors was farther away from the palatal plane than in the norm face type and long face type.
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 .
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