Document Details

Document Type : Article In Journal 
Document Title :
The Position of Anatomical Porion in Different Skeletal Relationships
وضع بوريون التّشريحيّ في العلاقات الهيكليّة المختلفة
 
Subject : The Position of Anatomical Porion in Different Skeletal Relationships 
Document Language : English 
Abstract : Previous research has shown that the position of glenoid fossa differs in different skeletal relationships. However, it is hard to identify and trace the glenoid fossa on a lateral cephalometric radiograph. The aim of the present study was to evaluate the anteroposterior and the vertical positions of the porion point (P) in different skeletal relationships as seen on lateral cephalometric radiographs. Methods: Two hundred eighty lateral cephalometric radiographs of orthodontic male patients (age range: 12 + 0.6) having different skeletal relationships were traced and corrected for magnification distortion. They were divided into three groups according to their sagittal relationships. All selected patients had average lower face height and mesofacial type. Five vertical and horizontal linear measurements were performed; from P to CF point [Ricketts], basion (Ba) and to condylion (Co). Intra and inter-examiner reliability tests were performed. Data were statistically analyzed using ANOVA test. Results: In relation to CF, P was significantly positioned more posteriorly in Class II than in Class I (P<0.05) or in Class III (P<0.05), and no statistically significant difference in the position of P between skeletal Class I and III relationships. In relation to Ba, P was significantly positioned more posteriorly in Class II than in Class I (P<0.05) and no statistically significant difference in the vertical or anteroposterior positions of P between skeletal Class I and III relationships. However, skeletal Class II subjects showed more superiorly positioned P than in Class III subjects when related to Ba (P<0.05). There was no statistically significant difference in the vertical and the anteroposterior position of the P to Co between different skeletal relationships. Conclusion: The position of porion (P) point on a cephalometric radiograph varies among different skeletal relationships. The posteriorly positioned P point in Class II subjects could be a cause for the mandibular retrognathism in skeletal Class II malocclusion 
ISSN : 1319-1004 
Journal Name : Medical Science Journal 
Volume : 25 
Issue Number : 1 
Publishing Year : 1424 AH
2004 AD 
Article Type : Article 
Added Date : Saturday, February 5, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
علي حبيب اكبرAkbar, Ali HabibResearcherDoctorate 

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