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Search Results: 1 - 10 of 92966 matches for " José Fernando Castanha;Freitas "
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Estudo comparativo entre técnicas de superposi??es cefalométricas totais
Zampieri, Ricardo Fernando;Henriques, José Fernando Castanha;Freitas, Marcos Roberto de;Janson, Guilherme R. P.;
Revista Dental Press de Ortodontia e Ortopedia Facial , 2005, DOI: 10.1590/S1415-54192005000600015
Abstract: aim: this study was aimed at verifying whether there are differences among the results obtained by total superimposition techniques. methods: a sample of 50 cephalometric x-rays from patients aged 8.25-16.25 years was used to assess the alterations that derive from craniofacial growth and development, as well as from orthodontic treatment. cephalometric variables representative of direction and magnitude of displacements of facial-skeletal components were used to assess those alterations. results and conclusion: we concluded that superimposition techniques can produce significantly different results.
Características oclusais de pacientes com Classe II, divis?o 1, tratados sem e com extra??es de dois pré-molares superiores
Graciano, Jo?o Tadeu Amin;Janson, Guilherme;Freitas, Marcos Roberto de;Henriques, José Fernando Castanha;
Dental Press Journal of Orthodontics , 2010, DOI: 10.1590/S2176-94512010000600011
Abstract: objective: the purpose of this study was to identify initial occlusal characteristics of class ii, division 1 patients treated with and without extraction of two upper premolars. methods: for this purpose, 62 patients presenting with class ii, division 1 malocclusion were selected and divided into two groups according to treatment type. group 1 consisted of 42 patients (23 females and 19 males) with a mean age of 12.7 years, who were treated without extractions, with fixed appliance and headgear. group 2 was composed of 20 patients (6 females and 14 males) with a mean age of 13.5 years, also treated with fixed appliance combined with the use of headgear, but group 2 treatment plan indicated the extraction of two premolars. in order to observe initial and final occlusal characteristics as well as changes throughout treatment the treatment priority index (tpi) was used. tpi values were subjected to statistical analysis by the independent t-test to compare variables between groups. results and conclusions: the results showed that the degree of initial malocclusion was different in the two groups when assessed by the tpi, which was higher in the group treated with extraction of two upper premolars
Estudo comparativo de complica??es durante o uso do aparelho de Herbst com cantiléver e com splint inferior de acrílico removível
Moro, Alexandre;Janson, Guilherme;Moresca, Ricardo;Freitas, Marcos Roberto de;Henriques, José Fernando Castanha;
Dental Press Journal of Orthodontics , 2011, DOI: 10.1590/S2176-94512011000100005
Abstract: objective: to assess and compare the type of complications during herbst treatment with cantilever bite jumper (cbj) and removable mandibular splint. methods: twenty one consecutive herbst patients treated with the cbj were compared with twenty one patients consecutively treated with herbst with stainless steel crowns on the maxillary first molars and a removable mandibular acrylic splint. the initial mean age for the cbj group was 12 years and 3 months and for the splint group was 11 years and 3 months. both groups used the herbst appliance for 12 months. based on the patients' clinical records an occurrence survey of complications during herbst treatment was performed. results: there were 24 complications for the cbj and 53 for the splint group, which were statistically different (mann-whitney test, p<0.05). the prevalence of patients exhibiting complications during treatment was 66.67% in the cbj and 85.71% in the splint group. the frequencies of complications were also statistically different between the groups. conclusions: the cbj exhibited a significantly smaller number of complications during herbst appliance treatment than the removable mandibular splint. herbst appliance with first molar crowns and a cantilever on the mandibular molars is preferable to the removable mandibular acrylic splint because of savings in clinical and laboratory time.
Estabilidade pós-conten??o das altera??es da forma do arco inferior na má oclus?o de Classe II de Angle tratada com e sem a extra??o de pré-molares
Busato, Mauro C. Agner;Janson, Guilherme;Freitas, Marcos Roberto de;Henriques, José Fernando Castanha;
Revista Dental Press de Ortodontia e Ortopedia Facial , 2006, DOI: 10.1590/S1415-54192006000500014
Abstract: aim: the purpose of this research was to compare the relapse of the postretention lower arch form in patients with class ii malocclusions, that were treated with either two or four premolar extraction therapies. methods: group 1 consisted of 19 patients (9 male e 10 female) treated with two premolar extraction, and group 2 consisted of 47 patients (20 male e 27 female) treated with four premolar extraction. the initial mean age of the first group was 14.04 years, and the initial mean age for group two was 13.03 years. individual variables of the mandibular arch, such as intercanine width, intermolar width and arch length, were evaluated in the pre-treatment, end of active treatment and five years posttreatment diagnostic casts of each patient. lndependent t tests were used to compare the differences of the variables between groups. results: results demonstrated that there were no statistically significant difference between the groups for posttreatment constriction of the mandibular arch (width and length). conclusion: it was concluded that the treatment of class ii malocclusion with two premolar extraction provides the same stability for lower arch form as the treatment with four premolar extraction.
Classe II divis?o 1 associada à deficiência transversal maxilar. Tratamento com disjuntor tipo Hyrax e aparelho de Herbst: relato de caso clínico
Quaglio, Camila Leite;Henriques, Rafael Pinelli;Henriques, José Fernando Castanha;Freitas, Marcos Roberto de;
Revista Dental Press de Ortodontia e Ortopedia Facial , 2009, DOI: 10.1590/S1415-54192009000500016
Abstract: the angle class ii division 1 malocclusion is often accompanied by maxillary transverse deficiency. when ever is possible, this maxillary transverse problem must be corrected before the anteroposterior correction. the rapid maxillary expanders is the appliance more used to correct the transverse deficiency. for the class ii malocclusion correction the fixed functional appliances are more studied and used. they are a kind of intraoral appliance that almost don't need patient's collaboration. the aim of this study is to show the results' stability after six years of the orthodontic treatment with hyrax expander, followed by herbst and straight wire appliances. after a literature review, a clinical case with maxillary transverse deficiency and class ii division 1 malocclusion treated with this therapy is reported. the treatment duration was very brief and the results were functionally and esthetically satisfactory with a long-term stability.
Influência da coopera??o no planejamento e tempo de tratamento da má oclus?o de Classe II
Maria, Fábio Rogério Torres;Janson, Guilherme;Freitas, Marcos Roberto de;Henriques, José Fernando Castanha;
Revista Dental Press de Ortodontia e Ortopedia Facial , 2005, DOI: 10.1590/S1415-54192005000200007
Abstract: orthodontic treatment alternatives in cases presenting a complete bilateral class ii malocclusion are varied and may include extractions or not. when the option includes extractions, sagital correction of class ii malocclusion is enormously facilitated by the choice of two upper premolar extractions. when the choice excludes extractions and priorize posterior dental distalization, it seems evident a greater mechanical need and mainly a greater demand for patient cooperation so that the expected results can be reached. therefore it was decided to evaluate and compare the level of cooperation demonstrated by 73 patients showing a complete bilateral class ii, planned without extractions in group 1 or with 2 upper premolar extractions in group 2, and then verify if the initial therapeutical plan associated with the patients cooperation level influenciated final results. the results demonstrated that the initial therapeutical decision based on the sagital correction of class ii malocclusion without extractions, using extraoral distalization forces, was clearly dependent of patient cooperation, forcing this group into a reavaluation in order to reach treatment goals, consequently extending significantly the duration of orthodontic treatment.
Estudo cefalométrico das altera??es das alturas faciais anterior e posterior em pacientes leucodermas, com má oclus?o de classe II, 1a divis?o de Angle, tratados com e sem extra??o de quatro primeiros pré-molares
Machado, Daniele Teixeira;Henriques, José Fernando Castanha;Janson, Guilherme;Freitas, Marcos Roberto de;
Revista Dental Press de Ortodontia e Ortopedia Facial , 2005, DOI: 10.1590/S1415-54192005000600006
Abstract: aim: the cephalometric changes of anterior and posterior facial heights, in the class ii, division 1 treatment, were compared among three different groups of patients: 4-premolar extraction, non-extraction and control. methods: each test sample consisted of 22 patients from whom lateral headfilms were obtained, either at the beginning or in the end of the treatment. fourteen compatible subjects, comprising the control group, had their radiographs taken accordingly, at this same time interval. the one-way anova was used to identify differences among the groups regarding the observed variables. results and conclusion: as a result, significant differences for the anterior and posterior facial heights were not statistically detected among the groups. based upon this methodology, no significant influence of the orthodontic treatment therapy was revealed over the facial heights, but rather similar behavior, in all groups, toward increasing the lafh, uafh, tafh, pfh, afh, tpfh and cf-go'. the rate between the tpfh and the tafh exhibited an increase in groups i (4-premolar extraction) and iii (control). in all three groups, the vertical drift of upper and lower first molars were similarly modified, producing a significant extrusion of these teeth, mainly in the lower arch of the treated sample. sagital dentoalveolar changes, regardless of the group, consisted of mesial movement of all first molars. the largest mesial movements, however, were found to occur in the 4-premolar extraction and in the control groups.
Estudo da correla??o do posicionamento dos incisivos superiores e inferiores com a rela??o antero-posterior das bases ósseas
Cabrera, Carlos Alberto Gregório;Freitas, Marcos Roberto de;Janson, Guilherme;Henriques, José Fernando Castanha;
Revista Dental Press de Ortodontia e Ortopedia Facial , 2005, DOI: 10.1590/S1415-54192005000600008
Abstract: aim: it was studied the behavior of the dentoskeletal relationship through the wits appraisal and the acceptable variations of the maxillary and mandibular incisor buccolingual inclinations through different methods using teleradiographies and plaster models. methods: the sample was comprised by teleradiographs in lateral norm and plasters models from fifty seven brazilian youths, divided in 26 male and 31 females. the age ranged from 15 years and 5 month old for the females and 16 years and 6 month old for the males, orthodontically treated by the straight-wire appliance, where a perfect occlusion was prioritized. results: the normative value for wits appraisal from this sample was -2.26mm (sd=1,83), showing no sexual dimorfism. mean upper incisor inclination was +13,35o and mean lower incisor inclination was +5.14o, when cephalometric measurements were evaluated. from plaster models measurements, the mean inclination pattern for maxillary and mandibular incisor were +7.96o and +5,03o, respectivaly. conclusion: it was found a significant correlation between skeletal sagital relationship and upper and lower inclinations.
Estudo comparativo das altera??es dentoesqueléticas da má-oclus?o de Classe II, 1a divis?o de Angle, nos jovens sem tratamento e nos submetidos a dois tipos de aparelhos ortod?nticos
MALTAGLIATI, Liliana ávila;HENRIQUES, José Fernando Castanha;ALMEIDA, Renato Rodrigues;FREITAS, Marcos Roberto;PINZAN, Arnaldo;
Revista de Odontologia da Universidade de S?o Paulo , 1999, DOI: 10.1590/S0103-06631999000400015
Abstract: the purpose of this study was to compare the skeletal and dental changes of the class ii, division 1 malocclusions with and without treatment. seventy five patients were divided in three groups: control, treated with a modified maxillary splint and treated with fixed appliance and kloehn headgear, each one having thirteen males and twelve females. the cephalometric radiographs were traced and analyzed by means of the "dentofacial planner" software. the results showed that there is little change in the pattern of growth and that the anteroinferior facial height increases in the three groups. there is no significant improvement in the maxillomandibular relationship in the control group, while in the treatment groups, the maxilla seemed to be retracted with a significant decrease in the anb angle. the dentoalveolar changes showed that the appliance used in the second group is efficient in controlling the vertical extrusion of the upper teeth. in both treated groups, they are moved distally, leading to a normal molar relationship and the reduction of the overjet. in the controls, however, the teeth continue to develop in an anteroinferior direction, maintaining the class ii characteristics.
Avalia??o de um programa de tra?ado cefalométrico
Vasconcelos, Maria Helena Ferreira;Janson, Guilherme;Freitas, Marcos Roberto de;Henriques, José Fernando Castanha;
Revista Dental Press de Ortodontia e Ortopedia Facial , 2006, DOI: 10.1590/S1415-54192006000200007
Abstract: aim: to evaluate the cephalometric software radiocef 2.0 regarding reliability and precision, as compared to the conventional manual tracing and measuring procedures, and to the software dentofacial planner 7.02 (gold standard). methods: the sample consisted of 50 good quality lateral head films from patients of both gender at the 11 to 24-year age range belonging to the files of the orthodontic graduate clinic at bauru dental school, university of s?o paulo. the radiographs were traced and measured by different methodologies generating four groups as follows: group 1 (the radiographs were manually traced and measured); group 2 (the cephalograms and landmarks were scanned and measured with radiocef 2.0 software); group 3 (the radiographs were scanned and measured with radiocef 2.0 software); and group 4 (the landmarks were digitized and measured with dentofacial planner 7.02 software). linear and angular measurements were performed and an analysis of variance and a kruskal-wallis test were conducted for intergroup comparison. results: results demonstrated no statistically significant differences between the groups. conclusions: the software is reliable to be used for clinical and investigative purposes and that radiocef 2.0 can be used by either scanning the cephalograms and landmarks or by scanning the radiograph itself.
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