دراسة شعاعية لموثوقية النقطة C (كوتيند) في تشخيص حالات سوء الإطباق في المستوى السهمي.
Abstract
There are many ways of diagnosing malocclusion in the sagittal level on cephalometric images, one of which is the point C method of Cotend.
.The study sample consisted of 87 patients (I,II,III Classes), and then we limit the point C (the convergence of a column at the palatal plane from point A and a column on the lower mandibular from point B.
The agreement of point C was compared with the value of the ANB angle in terms of the corresponding of the two values in the diagnosis of basal variation.
The results showed that the two values totally corresponded to the diagnosis of the second and third classes and partly in the cases of the first class.
There was a strong correlation between the two values for all males and females, and for females of the third class. And varied in the rest of the groups
Conclusions: We can count on point C in the diagnosis of malocclusion in class II and III, and especially in class I.
تعددت طرق تشخيص حالات سوء الإطباق في المستوى السهمي على الصور السيفالومترية، وأحد هذه الطرق هي طريقة النقطة C لكوتيند.
تألف عينة البحث من 87 مريضا (صنف أول وثاني وثالث)، ثم تحديد النقطة C (التقاء عمود على المستوى الحنكي مارا من النقطة A وعمود على الفك السفلي مارا من النقطة B).
تمت مقارنة توافق النقطة C مع قيمة الزاوية ANB من حيث تطابق القيمتين في تشخيص التفاوت القاعدي.
جاءت النتائج بحيث تطابقت القيمتان بشكل كامل في تشخيص الصنف الثاني والثالث وبشكل جزئي في حالات الصنف الأول.
كان الارتباط قوياً بين القيمتين عند مجمل الذكور، ومجمل الإناث، وإناث الصنف الثالث، ومتفاوتاً في باقي المجموعات.
الاستنتاجات: من الممكن أن نعوّل على النقطة C في تشخيص سوء الإطباق في الصنفين الثاني والثالث، وبشكل أقل في الصنف الأول.
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