Surgically assisted rapid maxillary expansion is the treatment of choice for correcting maxillary transverse deficiency in adults. Traditionally, the appliance for expansion is tooth-borne and tissue-tooth-borne devices (Hyrax and Haas). Although a number clinical and radiographic studies have evaluated the surgically assisted rapid maxillary expansion, only limited information is available to study the transverse movement of the midpalatal suture with computed tomography. Forty adult patients of both sexes, ranging in age from 18 to 38 years, with bilateral transverse maxillary deficiency were operated on. Twenty patients had Hyrax expander, and 20 had Haas expander. Under general anesthesia, subtotal Le Fort I osteotomy was performed including pterygomaxillary dysjunction. The width of the midpalatal suture opening was measured at the anterior edge of the midpalatal suture and at the junction of the midpalatal suture and palatal bones, using computed tomography in axial acquisition, obtained in the preoperative period and immediately after the end of expansion. A digital caliper was used to measure Haas and Hyrax distance on the central jackscrew preoperatively and postoperatively. The proportion between the midpalatal suture expansion and the amount of expansion on the jackscrew was evaluated. The mean of midpalatal suture opening and screw opening for Haas group was 5.19 and 8.78 mm, and for the Hyrax group, 5.85 and 8.51 mm, respectively. Both groups showed parallel-shaped separation of the midpalatal opening with no significant difference in the anterior and posterior portion. Midpalatal/jackscrews opening proportion was greater in the Hyrax group (69,2%) than in the Haas group (60%).
INTRODUÇÃO: atualmente, considera-se multifatorial a etiologia da desordem temporomandibular (DTM), na qual fatores psicológicos, parafunções orais, má oclusão morfológica e funcional constituem possíveis causas para o desenvolvimento dessa disfunção. OBJETIVO: avaliar as crianças que procuram por tratamento ortodôntico preventivo, visando compreender melhor suas queixas e avaliar a prevalência de sinais e sintomas de desordem temporomandibular. MÉTODOS: sessenta e cinco crianças, com idades variando entre 6 e 11 anos, foram avaliadas por dois examinadores. RESULTADOS: o bruxismo foi o sintoma que apresentou o maior índice de prevalência na amostra estudada e a deglutição atípica apresentou o maior índice dentre os fatores predisponentes. CONCLUSÃO: recomenda-se que a avaliação dos possíveis sinais e sintomas da DTM em crianças seja adotada como rotina durante o exame clínico inicial.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.