Symptoms of obstruction and dimensions of the nasal cavity after Surgically Assisted Rapid Maxillary Expansion with 2 and 3 segments: randomized clinical trial

Not Applicable

• Conditions: Anomalies of the relationship between the dental arches; C05.660.207.540

• Registration Number: RBR-8rhkm25
• Lead Sponsor: niversidade Federal de São Paulo

Brief Summary

This study aimed to evaluate Surgically Assisted Rapid Maxillary Expansion (SARME), with osteotomies separating the maxilla into 2 and 3 segments, on the symptoms of obstruction and dimensions of the nasal cavity in patients with transverse skeletal deficiency of the maxilla. In each group, 16 patients with said deficiency equal to or greater than 7 mm were analyzed, totaling 32 patients. All patients were evaluated pre- and postoperatively up to 10 months after expander activation. Using acoustic rhinometry, the minimum cross-sectional area and volume of the nasal cavities were identified. The Nose scale was applied to evaluate the symptoms of nasal obstruction. The palate area was measured via digitalized maxillary models. As a result, there was no difference between the groups (p = 0.370). An increase in the palate area was observed postoperatively (p < 0.001). The minimum cross-sectional area showed a non-significant increase (p = 0.203) and together with the volume (p = 0.174) of the nasal cavities remained constant. The Nose scale score decreased in the postoperative periods (p < 0.001), implying a reduction in nasal obstruction symptoms in both groups. In conclusion, the 3-segment SARME is as effective as the 2-segment one in improving the symptoms of nasal obstruction in patients with transverse skeletal deficiency of the maxilla. SARME, regardless of the surgical technique, should only be indicated for the correction of the aforementioned deformity. Although an improvement in nasal breathing is expected, this should be understood as probable but not certain

Detailed Description

Not available

Study Timeline

• Study Start: 2022-06-22
• Study Completion: 2022-09-01
• Results First Posted: 2023-08-26
• Last Update Posted: 13 November 2023

Recruitment & Eligibility

• Status: Recruitment completed
• Sex: Not specified
• Target Recruitment: Not specified

Inclusion Criteria

Adult patients, literate and without cognitive impairment. Present maxillary transverse skeletal deficiency equal to or greater than 7 mm. Distance between the roots of the lateral incisors and maxillary canines of at least 1.2 mm so that osteotomies could be performed if the patient was randomized to the group with 3-segment osteotomies.

Exclusion Criteria

Patients with unilateral transverse maxillary skeletal deficiency. Presence of congenital craniofacial syndromes. Surgeries previously performed on the maxilla or nose. Diagnosis of possible nasal alterations such as the deviated septum, hypertrophy of the nasal turbinates, polyps, etc. Patient who had the expander loosened during the activation or retention period. Patients who did not perform any of the postoperative exams in their respective periods of analysis.

Study & Design

• Study Type: Intervention
• Study Design: Not specified