Navegando por Palavras-chave "palatal expansion technique"
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- ItemSomente MetadadadosComplications From Surgically Assisted Rapid Maxillary Expansion With HAAS and HYRAX Expanders(Lippincott Williams & Wilkins, 2018) Pereira, Max Domingues [UNIFESP]; Koga, Alexandre Fukuzo [UNIFESP]; Prado, Gabriela Pereira Ribeiro [UNIFESP]; Ferreira, Lydia Masako [UNIFESP]The current study aimed at comparing the number and type of undesired outcomes during and after the maxillary expansion performed with HYRAX and HAAS expanders. A total of 90 patients (41 males and 49 females, 45.6% and 54.4%, respectively) aged 18 to 59 (mean age of 26.1
- ItemAcesso aberto (Open Access)Desmineralização dentária de pacientes respiradores orais submetidos à expansão maxilar(Associação Brasileira de Otorrinolaringologia e Cirurgia Cervicofacial, 2010-12-01) Bakor, Silvia Fuerte [UNIFESP]; Pereira, Julio Cesar Mota [UNIFESP]; Frascino, Silvana [UNIFESP]; Ladalardo, Thereza Christinna Cellos Gonçalves Pinheiro [UNIFESP]; Pignatari, Shirley Shizue Nagata [UNIFESP]; Weckx, Luc Louis Maurice [UNIFESP]; FAPI Curso de Especialização em Ortodontia; Universidade Estadual de Feira de Santana Curso de Odontologia; Universidade Federal de São Paulo (UNIFESP); APCDMouth breathing may cause deformities on the dental arch and be a risk factor for caries and periodontal disease; fixed orthodontic appliances compound the problem. AIM: to evaluate mineralization of tooth enamel and the oral cariogenic microbiota of mouth breathers that are using maxillary expanders. MATERIAL AND METHOD: a prospective study of 20 mouth-breathing patients with maxillary atresia, aged from 09 to 13 years. Enamel mineralization was measured using a fluorescence technique, before installing the expander and after its removal. The cariogenic microbiota was evaluated by the No Caries®. The t test (p<0.05) was applied for the statistical analysis, and the oral microbiota was analyzed by incidence. RESULTS: there was a statistically significant difference in the enamel mineralization level after maxillary expansion; the mean value was 3.08. The colorimetric test showed that the caries development potential was reduced in 45%, increased in 15%, and unaltered in 40% after maxillary expander use. CONCLUSION: there was a statistically significant difference in enamel mineralization after maxillary expansion; this difference was within the clinically normal range; the cariogenic potential increased in a small number of patients during orthodontic treatment.
- ItemSomente MetadadadosEfeitos morfofuncionais da disjunção maxilar em respiradores orais(Universidade Federal de São Paulo (UNIFESP), 2014-02-26) Gregolin, Paula Rotoli [UNIFESP]; Testa, Jose Ricardo Gurgel Testa [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Introduction: The mouth breathers usually present altered shape and orofacial function, such as maxillary atresia precursor of skeletal posterior crossbite, interfering in areas of occlusal contact and chewing. For the correction of this malocclusion, the Hyrax expander allows the disjunction of the maxilla, improving the maxillarymandibular relationship and breathing. Objective: Evaluate the effects of the maxillary disjunction on the facial structures and chewing of mouth breathing children and teenagers. Method: Thirty patients (ages 6-14 years) underwent the procedure using the maxillary Hyrax appliance and evaluated at the pre - disjunction (T0), postdisjunction (T1) and 4 years after maxillary disjunction (T2), with frontal view radiography to obtain the craniofacial measures through the Cef-X program and analysis of chewing videotaped using the Sony Vegas Pro10 ® program to check the chewing type and mandible movements during chewing. The findings were compared over the three times. Results: In the evaluation of the sample before to disjunction, 43.3 % showed alternating bilateral chewing (AB), 56.7 % preferential unilateral (PU) and 13.3% (PU) of these on the left side. It was found that the side of the crossbite before maxillary expansion is not associated to the masticatory preference side throughout the three periods. The percentage of rotational cycles is related with the chewing side when evaluated three months after maxillary expansion (p = 0.040) while during the other periods this did not occur. An increase in the percentage of rotational cycles at times T1 and T2 was observed. Regarding change of chewing side comparing the 3 periods we noticed that most children maintained the side of chewing, and the percentage of T0 to T1, 52.4%; T0 to T2 and 52.4% and T1 to T2 58.3%. Also during the three periods, the study of the relationship between cephalometric information and the prefered masticatory side showed that only the inclination of the occlusal plane is related to the chewing side after 4 years of rapid maxillary expansion (p = 0.006). Conclusion: The maxillary disjunction in mouth-breathing children and teenagers promoted a positive inference in facial structures and affected the chewing very little, it showed a tendency to equilibrium after maxillary expansion.
- ItemAcesso aberto (Open Access)Estudo das alterações craniofaciais e da importância da expansão rápida da maxila após adenotonsilectomia(Associação Brasileira de Otorrinolaringologia e Cirurgia Cervicofacial, 2012-04-01) Pereira, Silvia Regina Amorim; Weckx, Luc Louis Maurice [UNIFESP]; Ortolani, Cristina Lúcia Feijó; Bakor, Silvia Fuerte [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); UNIPObstructive hypertrophy of the tonsils and/or adenoids is associated with mouth breathing and can lead to facial imbalances. Adenotonsillectomy is not enough to treat the anatomic changes. Facial orthopedic techniques aid in morphological and functional recovery. This prospective longitudinal clinical study aimed to observe craniofacial changes after adenotonsillectomy and to verify the importance of linking rapid maxillary expansion to treatment. METHOD: Fifty-three children of both genders, aged 6 to 12 years, were allocated to: Group 1, 20 children with nasal breathing; and group 2, 33 children with obstructive hypertrophy of pharyngeal and/or palate undergoing adenotonsillectomy. After surgery, this group was subdivided into Group 2A, 16 patients not treated with rapid maxillary expansion; and Group 2B, 17 patients treated with maxillary rapid expansion. Frontal and lateral cephalometric measurements were made prior to surgery and after 14 months. Statistical analysis used the Kruskal-Wallis and Wilcoxon tests - significance level of 5%. RESULTS: Adenotonsillectomy balanced transversal, sagittal and vertical growth in both groups, and was more effective in the group undergoing combined treatment. CONCLUSIONS: Adenotonsillectomy improved the facial growth of children with obstructive hypertrophy, which was more evident when associated with rapid maxillary expansion.
- ItemSomente MetadadadosTransverse effects after surgically assisted rapid maxillary expansion in the midpalatal suture using computed tomography(Lippincott Williams & Wilkins, 2008-03-01) Loddi, Patrícia Porto [UNIFESP]; Pereira, Max Domingues [UNIFESP]; Wolosker, Angela Maria Borri [UNIFESP]; Hino, Claudia Toyama [UNIFESP]; Kreniski, Tessie Maria [UNIFESP]; Ferreira, Lydia Masako [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)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%).
- ItemSomente MetadadadosTransverse effects of surgically assisted rapid maxillary expansion: A comparative study using Haas and Hyrax(Lippincott Williams & Wilkins, 2008-05-01) Hino, Claudia Toyama [UNIFESP]; Pereira, Max Domingues [UNIFESP]; Sobral, Christiane Steponavicius [UNIFESP]; Kreniski, Tessie Maria [UNIFESP]; Ferreira, Lydia Masako [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Background: Surgically assisted rapid maxillary expansion is the treatment of choice for correcting transverse maxillary deficiency in patients with skeletal maturity, although the influence of the expander type on these alterations has not been elucidated yet.Objective: Determine the skeletal and dental transverse effects on the maxilla after completion of surgically assisted rapid maxillary expansion, with Haas and Hyrax expanders.Methods: Thirty-eight patients (aged between 118 and 39 years) were submitted to subtotal Le Fort I osteotomy and divided into Hass and Hyrax groups (19 patients each). Measurements of maxillary width, upper intermolar width, and its inclination on the posteroanterior cephalometric radiographs were obtained in the preoperatory period (T1), after the completion of the expansion (T2), and 4 months after the completion of the expansion (TU the intercusp and intergingival distances measured on the plaster models were obtained from the first premolars and molars, before expander cementation (M1) and after the expander removal (M2).Results: Both groups revealed statistically significant increase in the maxillary width, upper intermolar width, and inclination of the molars in T2 (P < 0.001); T3 showed a statistically significant decrease in the maxillary width and inclination of the molars (P < 0.001). the expansion presented an increment on the maxillary width of 71% from the upper intermolar width (T1 - T3), and molars had vestibular inclination (P < 0.05). the ratio of width increase of maxilla by the amount of device activation was of 69% for Haas and 74.5% for Hyrax.Conclusion: Clinically, the transversal effects were similar for both groups.