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Original Article

PAFMJ. 2015; 65(0): S236-S239


CORRELATION BETWEEN NASOLABIAL ANGLE AND MAXILLARY INCISOR INCLINATION

Abdullah Jan, Hamza Rehman, Nida Taifur, Azhar Ali Bangash.

Abstract
Objective: To find out the relationship between nasolabial angle and maxillary incisor inclination
Study Design: Cross sectional study
Patients and Methods: On the basis of inclusion criteria; 208 good quality lateral cephalograms were traced. Nasolabial angle and maxillary incisor to S-N plane were drawn. Correlation was done by using Pearson correlation coefficient (r). Bivariate analysis was done. p value was also determined. A p value of less than 0.05 was considered to be statistically significant.
Results: Out of a total study sample (N=208) 41% were male where as 58.2% were female. Regarding the class of occlusion, 40.4% of our population was Class I, 47% was class II and 12.5 % was Class III. The mean age of patients in our sample was 17.15 years with a range between 11 to 35 years. The mean nasolabial angle (NLA) was 102 degrees (50 to 148 degrees). The mean maxillary incisor to S-N plane (I –SN) angle was 105, with a minimum of 57 and maximum of 138 degrees and standard deviation of 12.02. Pearson correlation coefficient test (r=-0.97) showed that the relationship between pre-treatment nasolabial angle and pretreatment maxillary incisor inclination was not present.
Conclusions: Pretreatment relationship between maxillary incisor inclination and nasolabial angle is statistically insignificant.

Key words: Maxillary Incisor inclination, Nasolabial angle, Relationship.



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