International orthodontics · 2025
Comparison of differential and conventional rapid maxillary expansion on upper airway dimensions in children with bilateral complete cleft lip and palate: A CBCT-based secondary analysis of a clinical trial.
СтатьяСравнительное исследованиеНазвание и аннотация: Перевод в очереди
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Caffer Denise, Garib Daniela, Faber Carolina, Meireles Borba Alexandre, Volpato Luiz, de Cássia Moura Carvalho Lauris Rita, Malagodi de Almeida Araci, Guerra Lund Rafael
Аннотация
AIM: This study aimed to compare the changes in upper airway dimensions produced by conventional expanders (CE) and differential expanders (DE, which display two parallel jackscrews) in children with bilateral cleft lip and palate (BCLP).
MATERIALS AND METHODS: The initial clinical trial sample included 50 patients with complete BCLP who were treated with RME before the secondary bone graft procedure at a single centre-Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo (HRAC-USP). The patients were divided into two groups. Group DE were treated with differential expanders, while Group CE received Hyrax expansion during pre-bone graft orthodontics. Pre-expansion (T1) and six months post-expansion (T2) cone-beam computed tomography (CBCT) images were analysed to assess upper airway dimensions, including the nasal cavity, nasopharynx, oropharynx, and total pharyngeal space. Intergroup comparisons were performed using independent T-tests (α=0.004).
RESULTS: Of the initial 50 patients, the final Group DE consisted of 20 patients with a mean age of 9.07years while the CE group included 19 patients (13 males and 6 females), with a mean initial age of 9.19years. No statistically significant differences were observed between the changes of the two groups in the analysed variables, indicating that both expanders had similar effects on increasing upper airway dimensions.
CONCLUSION: Both CE and DE effectively increase upper airway dimensions in BCLP patients. These findings support that the choice of expander should be guided by the dental upper arch shape and the clinician's preferences.
MATERIALS AND METHODS: The initial clinical trial sample included 50 patients with complete BCLP who were treated with RME before the secondary bone graft procedure at a single centre-Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo (HRAC-USP). The patients were divided into two groups. Group DE were treated with differential expanders, while Group CE received Hyrax expansion during pre-bone graft orthodontics. Pre-expansion (T1) and six months post-expansion (T2) cone-beam computed tomography (CBCT) images were analysed to assess upper airway dimensions, including the nasal cavity, nasopharynx, oropharynx, and total pharyngeal space. Intergroup comparisons were performed using independent T-tests (α=0.004).
RESULTS: Of the initial 50 patients, the final Group DE consisted of 20 patients with a mean age of 9.07years while the CE group included 19 patients (13 males and 6 females), with a mean initial age of 9.19years. No statistically significant differences were observed between the changes of the two groups in the analysed variables, indicating that both expanders had similar effects on increasing upper airway dimensions.
CONCLUSION: Both CE and DE effectively increase upper airway dimensions in BCLP patients. These findings support that the choice of expander should be guided by the dental upper arch shape and the clinician's preferences.