Z. Tabatabaei; Hossein Aghili; M. Danesh Ardekani; F. Ghadiri
Abstract
Aim: Evaluation of facial shape and proportions is one of the most important steps in determining treatment options and outcomes. Balancing the position of the lips in relation to the nose and chin has a direct effect on patient aesthetic preference. Therefore the aim of this study was evaluation of ...
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Aim: Evaluation of facial shape and proportions is one of the most important steps in determining treatment options and outcomes. Balancing the position of the lips in relation to the nose and chin has a direct effect on patient aesthetic preference. Therefore the aim of this study was evaluation of the correlation between nasolabial angle and antero-posterior position of maxilla in orthodontic patients who referred to private dental office in Yazd city.
Material and Methods: In this cross- sectional descriptive study position of maxilla were evaluated based on Mc. Namara and Steiner analysis in the lateral cephalometric radiographs of 47 orthodontics patients (21 male and 26 female). Nasolabial angle (NLA) and lower nasolabial angle (LNLA) were measured and correlation between thesen parameters were analyzed by ANOVA test and Pearson’s correlation tests using SPSS(version 16).Results: Diffrences of Wit’s appraisal SNA and Mc namara values amoung three groups of maxillary deficiency, maxillary excess and orthognatic patients were statistically significant (p.value<0.05) but no correlation found among NLA or LNLA and maxillary position(p.value>0.05)Conclusion: Due to compensation of skeletal problems by teeth, NLA can not describe position of maxilla perfectly.
Mohammad Hossein Toodehzaeim; Hossein Aghili; Hoori Mirmohammadsadeghi; Elham Shariatifar
Abstract
Aim: To compare the prediction of unerupted permanent canine and premolar size of a comparable sample size of Iranian (Yazd) population with that of the study of Tanaka and Johnston.Materials and Methods: Teeth on study casts of an unselected sample from a 11 to 25 years old (n 120; 60 males and 60 females) ...
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Aim: To compare the prediction of unerupted permanent canine and premolar size of a comparable sample size of Iranian (Yazd) population with that of the study of Tanaka and Johnston.Materials and Methods: Teeth on study casts of an unselected sample from a 11 to 25 years old (n 120; 60 males and 60 females) were measured in the mesiodistal dimension. An Iranian mixed dentition analysis based on the Tanaka and Johnston method was constructed with new linear regression equations for prediction of the mesiodistal widths of unerupted canines and premolars. Digital calipers were used to measure the mesiodistal widths of all teeth on study models fabricated from alginate impressions. The predicted widths of the canines and the premolars in both arches were compared with the actual measured widths.Results: Sexual dimorphism was evident between Iranian (Yazd) males and females in incisors, canines, and premolars in the mesiodistal dimension.Conclusions: To predict the space (in mm) required for alignment of unerupted canine and premolars in Iranian(Yazd) children, divide the sum of the mesiodistal dimensions of the four mandibular incisors by two and add the respective constants for males (upper, 12.91; lower, 10.51) or females (upper, 9.09; lower, 8.22).