Patient and population (P)
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All adult patients (> 17 years) with a transverse maxillary hypoplasia requiring orthognatic surgery.
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Intervention (I)
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Segmental Le Fort I osteotomy.
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Comparator or control group (C)
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Surgically assisted rapid maxillary expansion
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Outcomes (O)
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Transverse dentoalveolar and skeletal expansion and relapse, total dentoalveolar expansion, frequency of complications and patient-related outcome measure.
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Study design (S)
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Human studies, including randomized controlled trials, controlled clinical trials and retrospective studies, with the aim of comparing transverse dental and skeletal expansion and relapse after segmental Le Fort I osteotomy compare to surgically assisted rapid maxillary expansion.
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Focused question
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Are there any differences in the transverse maxillary dentoalveolar and skeletal expansion and relapse between segmental Le Fort I osteotomy and surgically assisted rapid maxillary expansion?
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