Change in Nasolabial Angle During the Neuromuscular Correction of Excessive Gingival Display from Botulinum Toxin Type A
Journal Title: Scholars Journal of Dental Sciences - Year 2018, Vol 5, Issue 10
Abstract
Abstract: Nasolabial angle is an important parameter in clinical examination and cephalometric soft tissue analysis. Normal value of Nasolabial angle is 95-1100. Acute nasolabial angle suggests proclined teeth,short upper lip, anterior vertical maxillary excess. The purpose of that study was to determine the change in nasolabial angle by injecting BTX-A at particular muscle sites during botox therapy for gummy smiles caused by hyper contractibility or excessive muscle activity. Ten subjects from both the sexes with age group of16-27 years, with gummy smile more than 5mm of gingival exposure on smiling, due to hyperactivity of elevator muscles. Botulinium toxin type-A doseage of 1.25 U per muscle site per side was selected as a baseline at the start of the study. Under sterile conditions, 1.25 U per side was injected in both the right and left levator labii superioris and levator labii superioris alaeque nasi muscles (LLS), and an additional 1.25 U per side at the overlap areas of the levator labii superioris and zygomaticus. The effect of botox on nasolabial angle and gingival display was measured at the interval of 2weeks, 4 weeks, 8weeks, 16 weeks, and 24 weeks. The following conclusions were drawn from the present study botox-A injection was effective in reducing nasolabial fold on administration of 2.5 units on either side from 4th to 24th week.
Authors and Affiliations
Dr. Faisal Arshad, Dr. Shamshad Begum, Dr. Khadeer Riyaz
Keywords
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