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Register a new usercranial base and its relation with jaws rotation in adult(CBCT scan study)
قاعدة القحف و علاقتها باتجاه دوران الفكين لدى البالغين (دراسة بواسطة التصوير الطبقي المحوري المخروطي)
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Added by
Tishreen University ورقة بحثية
Publication date
2015
fields
Dentistry
and research's language is
العربية
Created by
Shamra Editor
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درست البنى الوجهية و علاقتها مع البنى المجاورة بشكل كبير بهدف الحصول على معلومات واسعة عن عملية النمو و التطور التي تحدث في منطقة المركب القحفي الوجهي بحيث يمكننا من التنبؤ باتجاه النمو و التداخلات العلاجية الجراحية و التقويمية التي يمكن إجراؤها عند الحاجة . هذا ينتمي المركب الأنفي الفكي العلوي إلى قاعدة القحف الأمامية في حين يرتبط الفك السفلي مع الجزء الخلفي من قاعدة القحف , لذلك تعتبر دراسة قاعدة القحف و التغيرات الشكلية التي تصيبها عاملا هاما في تحديد موقع كل من الفكين العلوي و السفلي. هدف البحث : تحري وجود علاقة بين قاعدة القحف و بين دوران الفكين لدى مرضى بالغين غير معالجين تقويميا باستخدام التصوير الطبقي المحوري المخروطي . مواد و طرق البحث : اعتمادا على نتائج الدراسة الشعاعيىة , بلغ عدد أفراد العينة 27 بالغاً (16 ذكور،11 أنثى) ممن لم يخضعوا لمعالجة تقويمية سابقة حيث تم انتقاؤهم من مرضى كانوا تلقائياً بصدد إجراء تصوير طبقي محوري مخروطي لأسباب لا تتعلق بمشاكل تقويمية ، تم إجراء دراسة سيفالومترية لتحديد اتجاه دوران الفكين وفق تحليل بيورك ، و من ثم تحليل معامل ارتباط بيرسون لدراسة العلاقة بين قياسات قاعدة القحف المجراة على صور الطبقي المحوري المخروطي مع القياسات السيفالومترية المحددة لاتجاه دوران الفكين . النتائج : أظهرت الدراسة وجود تنوع في الارتباط بين قياسات قاعدة القحف المجراة على صور الطبقي المحوري المخروطي مع القياسات الخاصة بنموذج دوران الفكين وفق تحليل بيورك. الخلاصة : لم يلاحظ وجود علاقة بين مورفولوجيا قاعدة القحف مع نموذج دوران الفكين لدى المرضى البالغين الغير خاضعين لمعالجة تقويمية .
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 treatments. 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.
References used
DE BEER GR.The development of the vertebrateskull. Oxford: Oxford University Press,1937
Graber TM, Vanarsdall RL, Vig KWL. Orthodontics: current principles and techniques. 4th ed. Elsevier Inc., 2005. p.117
Enlow DH, Hans MG. Essentials of facial growth. WB Saunders Co., Philadelphia; 1996. p. 193-199
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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.
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.
The aim of this research is to investigate the dimensional and positional symmetries
between the right and left condyles ,and the possible asymmetries between the condylar
processes that could be related to the type of growth pattern in adult subje
cts with no
clinical nor radiographic symptoms of TMDs.
Materials and methods: In result of a multistage clinical examination protocol, 14
Caucasian patients with normal growth pattern ,and with no prior orthodontics treatment
were selected (14 females)from 17 to 29 years of age with no clinical signs and symptoms
of TMDs.
The images obtained from the axial and sagittal slices, Cephalometric growth pattern
study was performed. Pearson's Correlation Coefficient and T-test were calculated.
Results :no statistically significant relationship between the measurements of
TMJ(left &right) and the normal growth pattern.
Conclusions:There is no relationship between the morphology of TMJ and normal
growth pattern in adult female orthodontically non-treated .
First Cervical Vertebra (Atlas) belongs to the Atlantoaxial joint which
connects the base of the skull to the spine. It plays a highly significant role in the
growth and function of the craniofacial complex. Atlas has function-anatomical
interrela
tionship with the TMJ. That means the Axis is involved in the
morphogenetic and function of the jaws.
Aim To investigate the relationship of Atlas's dimensions with jaws rotation
in adult orthodontically non-treated 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.
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