Skeletal, Dentoalveolar, and Buccal Bone Changes using Hybrid and Tooth-borne Expanders for RME and SARME in Different Growth Stages

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Kayalar E., Fıratlı S., Darendeliler M. A., Dalcı K., Dalcı Ö.

98th European Orthodontic Congress, Oslo, Norveç, 11 - 15 Haziran 2023, cilt.45, ss.20

  • Yayın Türü: Bildiri / Özet Bildiri
  • Cilt numarası: 45
  • Basıldığı Şehir: Oslo
  • Basıldığı Ülke: Norveç
  • Sayfa Sayıları: ss.20
  • İstanbul Üniversitesi Adresli: Evet

Özet

Skeletal, Dentoalveolar, and Buccal Bone Changes using  Hybrid and Tooth-borne Expanders for RME and SARME in Different Growth Stages Kayalar E1, Firatli S3, Darendeliler M1, Dalci K1, Dalci O1 1The University Of Sydney, School of Dentistry, Discipline of Orthodontics and Paediatric Dentistry, Surry Hills, Australia, 2 Istanbul Aydin University, Faculty of Dentistry, Department of Orthodontics, Istanbul, Turkey, 3Istanbul University, Faculty of Dentistry, Department of Orthodontics, Istanbul, Turkey Aim: To compare the skeletal, dentoalveolar and buccal bone thickness of tooth–bone-borne (Hybrid-H) and tooth-borne (TB) maxillary expanders used for rapid maxillary expansion (RME) in early and late adolescents and surgically-assisted RME (SARME) in young adults. Materials and methods: This two-centre clinical study included initial and 6 months post-retention CBCT records of 60 patients (27 males, 33 females; mean age 15.7 ± 3.75 years). The cohort was divided into two groups according to the expander type (H or TB) and subdivided into a further three groups determined by cervical vertebrae maturation stages: early adolescents (EA), late adolescents (LA), and young adults (A). EA and LA patients underwent RME and young adults received a SARME.  Results: The Hybrid-designed appliance increased the internal skeletal maxillary width and nasal width more than the TB-designed appliance anteriorly in EA and posteriorly in SARME young adults. The TB expanders tipped and expanded the first premolars more than the Hybrid SARME expanders in young adults and caused a greater reduction in buccal alveolar bone thickness at the level of the first premolars and molars at the three growth stages.  Conclusion: The Hybrid expanders, with relatively greater skeletal and nasal widening potential and fewer dentoalveolar side effects, were a favourable alternative to tooth-borne expanders for RME in the early and late adolescents, and for SARME in young adults.