title: Skeletal stability following mandibular advancement and rigid fixation with polylactide biodegradable screws.
abstract: Skeletal stability during the first year after mandibular advancement surgery and fixation using biodegradable self-reinforced poly-l-lactide (SR-PLLA) screws, without postoperative intermaxillary fixation, was studied in 25 patients by means of cephalometric measurements. The magnitude of advancement was on average, 3.88 mm at pogonion (PG) (range 1.25-6.5 mm) and 4.57 mm at B-point (range 2.75-7.5 mm). After one year a mean relapse backwards of 0.59 mm at the PG (15%) and 0.78 mm at the B-point (17%) was observed. Nineteen patients (76%) and 17 patients (68%) were stable at PG and B-point, respectively. SR-PLLA screws are considered to be comparable to other forms of rigid internal fixation for fixation of bilateral splitting osteotomies after mandibular advancement, as far as skeletal stability is concerned.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Helsinki University Central Hospital, Finland.
authors.forename: I
authors.initials: I
authors.lastname: Kallela
authors.forename: P
authors.initials: P
authors.lastname: Laine
authors.forename: R
authors.initials: R
authors.lastname: Suuronen
authors.forename: T
authors.initials: T
authors.lastname: Iizuka
authors.forename: S
authors.initials: S
authors.lastname: Pirinen
authors.forename: C
authors.initials: C
authors.lastname: Lindqvist
mesh_terms: D000042:Absorption; D000293:Adolescent; D000328:Adult; D001672:Biocompatible Materials; D001673:Biodegradation, Environmental; D001863:Bone Screws; D002508:Cephalometry; D005260:Female; D006801:Humans; D019248:Jaw Fixation Techniques; D008297:Male; D008334:Mandible / Q000601:surgery*; D019186:Mandibular Advancement / Q000379:methods*; D010027:Osteotomy / Q000379:methods; D011091:Polyesters; D012008:Recurrence; D063173:Retrognathia / Q000601:surgery; D016896:Treatment Outcome
chemical_list: D001672:Biocompatible Materials; D011091:Polyesters; C033616:poly(lactide)