To correlate interlabial gap, lip morphology and lip strain in various skeletal malocclusions in distt solan population – A cephalometric study

An aesthetically pleasing and balanced face is one of the objectives of orthodontic treatment. The evaluation of soft tissue morphology is an indispensable tool in clinical practice and in research and can be achieved with different approaches. : To correlate lip morphology, lip strain and interlabial gap in various skeletal malocclusions in dist solan population. 50 Pretreatment lateral cephalograms were included in the study. The sample was divided into 2 groups as group I(Skeletal Class I,N=25) and group II (Skeletal Class II ,N=25).Various angular and linear parameters were recorded to measure lip morphology, lip strain and interlabial gap. When linear parameters of both the groups (skeletal class I &skeletal Class II) were compared there were no significant result seen in UL-E (p=1.00), LL-E(p=0.45),UL-S(p=0.51),LL-S(p=0.36),UL-B(p=0.63),LL-B(p=0.44),LL-H(0.71),UL-T(p=0.58),LL-T(p=o.47). When lip strain, lip morphology and interlabial gap were correlated in Group I it was found that there were significant difference between the UL-E and SNB (p=0.02*) and in Group 2 there were significant differences between the Lip strain (LS-LI) & SNB (p=0.00*) UL-E and SNA (p=0.04*), UL-E and SNB(p=0.01*). When angular parameters between group I and group II were compared there were no significant differences between them. No significant difference is seen between the Lip morphology and lip strain but only significant changes ae seen in Interlabial gap while comparing the Skeletal Class II And Skeletal Class I.