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.

Effect of Surgically Assisted Rapid Maxillary Expansion on Upper Airway Volume: A Systematic Review

“…They did not note any correlation between nasal volume change and amount of transverse expansion at the appliance. At a long-term follow-up of 22 months using CBCT, Nada et al 39 found a statistically significant increase in nasal cavity volume of 9.74% (P < .001) in their hyrax group and 12.95% (P < .001) in their TPD group. There was no significant difference between these appliance results (P = .35).…”

“…Ultimately, 11 articles met all criteria for inclusion in this review; a PRISMA flowchart is shown in Figure 1. These 11 studies were comprised of 1 retrospective clinical trial, 35 8 prospective clinical trials, [14][15][16][36][37][38][39][40] 1 controlled clinical trial, 41 and 1 RCT. 42 In total, 204 treated patients were included in qualitative synthesis.…”

“…Blinding of assessors was outlined by 2 studies. 39,42 The blinding of assessors was considered unlikely to be possible, because researchers were generally involved in patient treatment from screening and appliance placement to outcome assessment. Complete outcome data reporting was found in all studies without selective reporting of results.…”

Assessment of changes in the nasal airway after nonsurgical miniscrew-assisted rapid maxillary expansion in young adults

“…7,8 Adults with OSA have also shown maxillary constriction; however, it remains unclear whether maxillary constriction is a primary etiological factor for OSA. 9 An increased upper airway volume has also been reported in adults treated with surgically assisted rapid maxillary expansion (SARME), 10,11 although the clinical significance of this finding is considered questionable because of measurement errors associated with the acoustic rhinometry (AR) technique and variability in individual response. 12 Furthermore, because a surgical procedure can affect the airway volume, the findings after SARME cannot be directly applied to MARME.…”

Volumetric upper airway changes following a new technique for Surgically-Assisted Maxillary Expansion (SAME)

“…[13][14][15] There are few studies in the literature that show the effect of SAME on the upper airway and compare the influence of different SAME techniques on the upper airway dimensions. 7,16,17 Therefore, the aim of this study was to show the effects of a new, minimally invasive SAME technique on the upper airway dimensions, and compare the results with the conventional SAME technique using cone beam computed tomography (CBCT).…”