Does the use of intra-alveolar chlorhexidine gel reduces the rate of alveolar osteitis, pain, edema and trismus after the extraction of lower third molars? A meta analysis - Armond, A C; Milani, L M; Fonseca, J D; de Castro Martins, C; Falci, S G (J Oral Maxillofac Surg Med Pathol, 2017)