title: [Research of dynamic measurements of perioral soft tissue]
abstract: OBJECTIVE:This article introduced a concept of dynamic image measurement for calculate the quantity of cirumoral soft tissue movements. METHODS: A developed computer image analyzing system was used to calculate the quantity of circumoral soft tissue movement under the three conditions. RESULTS: (1)When/mo/is pronounced,lip protrudes,the upper lip landmarks move upwards,imwards and forwards,and the lower lip landmarks downwards and backwards.The variation of upper lip triangular area will be M2<M3<M1,that of the lower lip will be M3>M2>M1. (2)When/si/is pronounced,as a result of vowel,the amount of lower lip moving down backwards is more than that when/mo/is pronounced,which makes the lower lip triangular area comes to be M3>M2>M1. CONCLUSION: Pronunciation is one of the important oral functins. It could be used as a method of research to measure the facial soft tissue change dynamically and effectively.
authors.affiliation: Department of Prosthodontics, School of Stomotology,Shanghai Second Medical University. Shanghai 200011,China.
authors.forename: J P
authors.initials: JP
authors.lastname: Luo
authors.forename: E Y
authors.initials: EY
authors.lastname: Lu
authors.forename: C Y
authors.initials: CY
authors.lastname: Yang