Cephalometric Sstandard Proportional Template for Normal Adults Based on Natural Head Orientation

Cephalometric analysis based on estimated natural head Orientation (NHO) could be used as reliable method as registered natural head position(NHP) without related technical problems. This study have been carried out in purpose of preparing a template that makes the use of extracranial reference possible. Cephalograms and photographs from 60 orthodontic patients’ files (30 males and 30 females) with proportionate profile and normal occlusion were analyzed. First, photographs adjusted into natural head position using estimated method then they were transmitted to cephalograms. From landmark N on cephalograms, true vertical and true horizontal lines were drowned. Then hard and soft tissue landmarks were identified and according to coordinate system and mean values, standard facial profile was obtained for male and female separately. The graphic mean face became incorporated into transparent sheets to form template for different gentle and size. SPSS 17 was used for statistic analysis. Difference less than 0.05 was considered significant. The comparison between two gentle registering on landmark N and true vertical line showed that linear measurements on the hole, are larger in males than females. Also in the males, forehead and chin are more prominenced and nasiolabial angle is less than females. use of proportional cephalometric template based on NHO could be an usful diognostic tool that leads to accurate and fast analysis.