Syed Suleman Shah, Ghulam Rasool, Faiz-ul hassan.
Relationship between head posture and lower arch dental crowding.
Pak Oral Dental J Jan ;35(3):420-3.

Objective of the study was to determine the relationships between head posture and lower arch crowding. Hundred cases records( lateral cephalograms and casts) were used in this study. Fifty percent were females and fifty percent males. The cases were divided into two groups; crowded and non-crowded. Each group containing 50 cases. The head posture (craniocervical angles- NSL/CVT, NSL/OPT) were measured in the both groups. Data were analyzed using SPSS for Windows version 16.0. The postural variables were calculated as the mean and standard deviation. The independent Student’s t-test was used to determine if significant head postural difference exists between the two groups(crowded and non-crowded). Statistical significance was set as P < 0.05. Out of total 100 patients in which 50 were females and 50 were males. Fifty cases were crowded and 50 were non-crowded. Their age ranged from 12 to 20 years with a mean age 16±3.2. The mean value for craniocervical angles; NSL/OPT and NSL/CVT were 97.34 and 101.50 respectively in non – crowded group. While the mean value for craniocervical angles; NSL/OPT and NSL/CVT were 106.57 and 111.40 respectively in crowded group. The difference in craniocervical angles (head posture) was statistically significant. It was concluded that extended posture is associated with lower crowded cases.

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