Association of head posture with inclination of incisors and dental arch crowding

Introduction: Head and cervical posture relationship has been a concern for many years because changes in head posture and its functional alterations can be related to craniofacial morphology. Changes in head posture also affect the upper and lower lip pressure which can presumably influence the inclination of the incisor .So, the aim of the present study was to investigate association between head posture, dental arch crowding and inclination of incisors. Material and Methods: The sample for the study consists of 200 subjects (100 males and 100 females) were divided into two groups: group 1 crowding larger than 2mm (50 males & 50 females) and another with crowding smaller or equal to 2mm (50 males & 50 females) as determined by Nance space analysis. Difference in variables studied on lateral radiograph which was taken with subjects made to stand in Natural Head Position were analyzed using Student’s unpaired “t” test. Results: The results shows significant association of head posture with dental arch crowding and inclination of incisors (p<0.05). Conclusions: (1) There is significant association between an increase in craniocervical angulation and dental arch crowding and inverse relationship between an increase in craniocervical angulation and inclination.