title: Volumetric changes of the nose and nasal airway 2 years after tooth-borne and bone-borne surgically assisted rapid maxillary expansion.
abstract: This study aimed to assess the effects of bone-borne and tooth-borne surgically assisted rapid maxillary expansion on the volumes of the nose and nasal airway 2 yr after maxillary expansion. This prospective cohort study included 32 patients with transverse maxillary hypoplasia. Expansion was performed with a tooth-borne distractor (Hyrax) in 19 patients and with a bone-borne distractor [transpalatal distractor (TPD)] in the remaining 13. Cone beam computed tomography scans and three-dimensional (3D) photographs of the face were acquired before treatment and 22 ± 7 months later, and were used to evaluate the volumes of the nose and nasal airway. Nasal volume increased by 1.01 ± 1.6% in the Hyrax group and by 2.39 ± 2.4% in the TPD group. Nasal airway volume increased by 9.7 ± 5.6% in the Hyrax group and by 12.9 ± 12.7% in the TPD group. Changes in the nasal volume and in the nasal airway volume between the pre- and post-treatment measurements were statistically significant, whereas differences between the treatment groups were not; 22 months after surgically assisted rapid maxillary expansion, the increases in the nasal volume and in the nasal airway volume were comparable between tooth-borne and bone-borne devices.
authors.affiliation: Department of Orthodontics and Craniofacial Biology, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands; Department of Orthodontics, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt; 3D Facial Imaging Research Group Nijmegen - Bruges (3D FIRG), Nijmegen, the Netherlands.
authors.forename: Rania M
authors.initials: RM
authors.lastname: Nada
authors.forename: Bram
authors.initials: B
authors.lastname: van Loon
authors.forename: Jan G J H
authors.initials: JG
authors.lastname: Schols
authors.forename: Thomas J J
authors.initials: TJ
authors.lastname: Maal
authors.forename: Martien J
authors.initials: MJ
authors.lastname: de Koning
authors.forename: Yehya A
authors.initials: YA
authors.lastname: Mostafa
authors.forename: Anne M
authors.initials: AM
authors.lastname: Kuijpers-Jagtman
mesh_terms: D000293:Adolescent; D000328:Adult; D002508:Cephalometry; D015331:Cohort Studies; D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D008310:Malocclusion / Q000628:therapy*; D008437:Maxilla / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000601:surgery; D009666:Nose / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D019857:Osteogenesis, Distraction / Q000379:methods*; D010155:Palatal Expansion Technique / Q000295:instrumentation*; D011446:Prospective Studies; D014070:Tooth / Q000000981:diagnostic imaging*
keywords: cone beam computed tomography; distraction osteogenesis; nasal airway; palatal expansion technique; three-dimensional stereophotogrammetry