The relationship of maxillary incisor eruption and upper lip length with the incisor stomion

Zafar ul Islam; Shahab Adil; Tania Arshad; Sanam Naveed; Sohaib Hassan; Hassan Ali Raza

The relationship of maxillary incisor eruption and upper lip length with the incisor stomion

Authors

Zafar ul Islam BDS, FCPS, Associate Professor Orthodontics, Peshawar Dental College, Warsak Road, Peshawar.
Shahab Adil BDS FCPS, Professor of Orthodontics, Peshawar Dental College, Warsak Road, Peshawar.
Tania Arshad BDS FCPS, Assistant Professor Orthodontics, Foundation University College of dentistry, Islamabad.
Sanam Naveed BDS, FCPS. Assistant Professor Orthodontics, Jinnah Medical and Dental College, Karachi
Sohaib Hassan BDS, FCPS, M Orth RCS Ed, Associate Professor Orthodontics Islamabad Medical and Dental College, Islamabad.
Hassan Ali Raza BDS, FCPS, Assistant Professor Orthodontics, Peshawar Dental College, Peshawar.

Keywords:

Incisor stomion, lip length, maxillary incisor height

Abstract

Introduction: To determine the correlation of maxillary incisor tooth eruption and lip length with the incisor stomion of orthodontic subjects.

Material and Methods: The lateral cephalograph of 180 subjects were traced and the various parameters like SNMP, FMA, MxCH and upper lip length were recorded. The incisor stomion were recorded from patient’s record files. Multivariate analysis of variance was applied to determine the difference in skeletal, dental and soft tissue variable among three vertical groups and gender of patients. Pearson’s correlation was applied to assess the relationship of lip length and maxillary incisor dental height with the incisor stomion.

Results: The MxIDH (p = .001) and lip length (p = .008) showed significant difference between males and female subjects. There was significant difference in MxIDH (p = .009) and lip length (p = .031) among the vertical facial patterns. The lip length showed a statistically significant (p = .016) but weak inverse correlation (r = ? .179) with incisor stomion. The MxIDH showed statistically highly significant (p = <.001) but positive weak correlation (r = .320) with incisor stomion.

Conclusions: Although, the lip length and maxillary incisor height are different in males and females, the gender has no effect of the incisor stomion. The lip length and maxillary incisor height increases with the increase in face height however, the incisor stomion remains constant. The maxillary incisor eruption is the strongest predictor in determining the incisor stomion.