Effectiveness of Different Modalities of Lip Repositioning Surgery for Management of Patients Complaining of Excessive Gingival Display: A Systematic Review and Meta-Analysis

Figure 1

PRISMA study flow diagram. One of the RCTs was a randomized clinical trial with two arms including modified lip repositioning surgery (LRS) and nonsurgical technique using Botulinum toxin type-A injection. According to our inclusion criteria, only the LRS group was included in our study. There were some studies with more than one reason for exclusion.