EVALUATION OF ARCH WIDTH VARIATIONS AMONG SKELETAL VERTICAL PATTERNS

Abstract

The relationship between vertical patterns and arch widths has always been a measure of interest. Present study was done to evaluate arch width variations among different skeletal vertical patterns. A cross sectional study was conducted at department of Orthodontics, Karachi Medical and Dental College, Karachi, Pakistan for six months after approval of synopsis with sample of 110 patients calculated by using WHO calculator. Arch width was calculated and SNMP angle was used for vertical plane analysis. One way ANOVA was used to evaluate differences between arch widths of patients with low, normal and high skeletal vertical patterns using SPSS 23.0. In terms of gender males were likely to have greater inter molar arch widths (i.e. 45.26±0.66) compared to that of females (i.e.42.97±0.31) though the measurements of 0.05. An insignificant weak inverse relationship was witnessed between inter molar arch widths and SNMP(r=-0.96) with p >0.05.The findings of the study sum ups that the measurement of arch width does not vary in accordance to various skeletal vertical patterns. Greater arch widths were witnessed in patients belonging to normal angle category whereas patients having low & high angle SNMP were observed to have minimum arch widths.