title: Implant handpiece with adapted drills in orthognathic surgery:  preventing facial scars.
abstract: The attachment of bilateral sagittal-split osteotomy of the mandibular ramus with bicortical screws or the combination of miniplates and a bicortical screw is complicated through the intraoral approach because of the angle required for insertion of screws, so it is necessary to use a trocater. This article aimed to report a technique developed and used in 60 patients, wherein an implant handpiece with adapted drills was used in the intraoral attachment. The setting was performed intraorally to prevent scarring and extraoral facial nerve damage, which may be caused by extraoral and transbuccal approaches routinely performed when using the trocater. The versatility of the handpiece implant allows for the insertion of monocortical and bicortical screws and rigid internal fixation of mandibular sagittal-split osteotomy, as well as surgical time reduction, decreasing postoperative morbidity.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Pontifícia Universidade Católica do Rio Grande do Sul Porto Alegre, Rio Grande do Sul, Brazil.
authors.forename: Otávio Emmel
authors.initials: OE
authors.lastname: Becker
authors.forename: Rafael Linard
authors.initials: RL
authors.lastname: Avelar
authors.forename: André do Nascimento
authors.initials: Ado N
authors.lastname: Dolzan
authors.forename: Juliana Gonçalves
authors.initials: JG
authors.lastname: Göelzer
authors.forename: Orion Luiz
authors.initials: OL
authors.lastname: Haas
authors.forename: Rogério Belle
authors.initials: RB
authors.lastname: de Oliveira
mesh_terms: D001860:Bone Plates; D001863:Bone Screws; D002921:Cicatrix / Q000517:prevention & control*; D004867:Equipment Design; D020220:Facial Nerve Injuries / Q000517:prevention & control*; D006801:Humans; D008310:Malocclusion / Q000601:surgery*; D057909:Orthognathic Surgery / Q000295:instrumentation*; D019415:Torque