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1.
Rev. Fac. Odontol. (B.Aires) ; 38(89): 31-37, 2023. ilus, tab
Article in Spanish | LILACS | ID: biblio-1552895

ABSTRACT

Objetivo: Comparar la discrepancia anteroposterior medida a nivel de la platina incisiva de 2 métodos de registro intermaxilar en la misma sesión que la im-presión definitiva en adultos mayores desdentados totales. Materiales y métodos. Se incluyeron en el es-tudio 20 pacientes (n=20) con edad promedio de 70 años. En cada uno de ellos se obtuvieron registros intermaxilares con cubetas rodete de acrílico: uno con inducción manual (IM) y otro autoinducido con el sistema de cubeta rodete de acrílico y apoyo central único utilizando una superficie palatina de registro curva (BYC). Los modelos fueron montados en un ar-ticulador Whip Mix modelo 2240 al que se le adicio-nó un dispositivo de papel milimetrado, Orthodent, a nivel de la platina incisiva, para registrar las dife-rencias existentes entre las posiciones obtenidas. El análisis estadístico se llevó a cabo mediante el cálcu-lo de intervalos de confianza (95%) para las diferen-cias medias y prueba de t de student para datos apa-reados (nivel de significancia: α<0,05). Resultados. En el plano mesiodistal a nivel de la platina incisiva se encontró diferencia estadísticamente significativa entre las dos variables de registro (p<0,001). A este nivel el BYC proporcionó registros más retrusivos que IM. Media aritmética (desviaciones estándar) en milímetros: 3,82 (2,1). Conclusión. El sistema de re-gistro con cubetas rodete acrílicas y BYC incorpora-do a las mismas proporciona un registro intermaxi-lar más retrusivo que IM en adultos mayores des-dentados totales cuando se realizan dichos registros en la misma sesión que la impresión definitiva (AU)


Objective: To compare the anteroposterior discre-pancy measured at the level of the incisal plate of 2 methods of intermaxillary registration in the same session as the definitive impression in fully edentu-lous older adults. Materials and methods. Twenty pa-tients (n=20) with an average age of 70 years were included in the study. On each of them, intermaxillary recordings were obtained with acrylic rims trays: one with manual induction (MI) and the other with a self-induced system and single central support using a curved recording palatal surface (BYC). The models were mounted in a Whip Mix model 2240 articula-tor to which an Orthodent graph paper device was added, at the level of the incisal plate, to record the di-fferences between the positions obtained. Statistical analysis was carried out by calculating confidence intervals (95%) for mean differences and T-student for paired data (significance level: α<0.05). Results. On the mesiodistal plane at the level of the incisal plate, a statistically significant difference was found between the two recording variables (p<0.001). At this level the BYC provided more retrusive recordings than MI. Arithmetic mean (standard deviations) in mi-llimeters: 3.82 (2.1). Conclusions. The registration system with acrylic rim trays and BYC incorporated into them provides a more retrusive intermaxillary registration than MI in fully edentulous older adults when such registrations are made in the same ses-sion as the final impression.(AU)


Subject(s)
Humans , Male , Female , Aged , Acrylic Resins , Dental Care for Aged , Dental Impression Technique/instrumentation , Mouth, Edentulous , Jaw Relation Record/methods , Argentina , Schools, Dental , Denture, Complete
2.
Rev. Ateneo Argent. Odontol ; 63(2): 28-33, nov. 2020. tab, graf
Article in Spanish | LILACS | ID: biblio-1150550

ABSTRACT

El objetivo de este estudio es determinar la frecuencia y características del edentulismo parcial y patologías de la articulación temporomandibular en pacientes adultos. Se realizó un estudio observacional y descriptivo de pacientes que concurrieron al Módulo de Odontología Rehabilitadora de la Facultad de Odontología, se seleccionaron 60 pacientes que necesitaban rehabilitación protésica parcial. Las variables estudiadas fueron: edad, sexo, clase de Kennedy, dolor articular, ruidos articulares, restricción y desviación mandibulares. Los datos fueron cargados en una base de datos diseñada a tal efecto, para su análisis estadístico. Del análisis del estudio se observó ausencia parcial de piezas dentarias con mayor frecuencia en el sexo femenino (58%), el 52% correspondieron a la clase I de Kennedy: el 64% en el maxilar inferior, el 17% presentó dolor articular, 28% ruidos articulares, 68% presentó desviación mandibular (siendo lo más frecuente hacia la derecha), y el 42% presentó restricción mandibular leve y solo un n=1, grave. Las pérdidas de las piezas dentarias bilaterales posteriores del maxilar inferior son las de mayor frecuencia asociado a patologías frecuentes del ATM. Partiendo desde la prevención, evitando las pérdidas de piezas dentarias y con una correcta rehabilitación se podrá lograr una buena salud bucodental (AU)


The objective of this study is to determine the frequency and characteristics of partial edentulism and pathologies of the temporomandibular joint in adult patients. An observational and descriptive study of patients who attended the Rehabilitation Dentistry Module of the Faculty of Dentistry was carried out; 60 patients who needed partial prosthetic rehabilitation were selected. The variables studied were age, sex, Kennedy class, joint pain, joint noises, mandibular restriction, and mandibular deviation. The data were loaded into a database designed for this purpose, for statistical analysis. From the analysis of the study, partial absence of teeth was observed with greater frequency in females (58%), 52% corresponded to Kennedy Class I: 64% in the lower jaw, 17% presented joint pain, 28 % joint noises, 68% presented mandibular deviation being the most frequent to the right, 42% presented mild mandibular restriction and only one n = 1 severe. Loss of the posterior bilateral teeth of the lower jaw are the most frequent associated with frequent TMJ pathologies. Starting from prevention, avoiding the loss of teeth and with correct rehabilitation, good oral health can be achieved (AU)


Subject(s)
Humans , Male , Female , Middle Aged , Temporomandibular Joint Disorders/etiology , Jaw, Edentulous, Partially/pathology , Argentina , Schools, Dental , Epidemiology, Descriptive , Arthralgia , Observational Study
3.
Int. j. med. surg. sci. (Print) ; 3(1): 771-777, 2016. tab
Article in English | LILACS | ID: lil-790605

ABSTRACT

Severe resorption in the posterior maxilla sectors as a result of tooth loss along with the process of pneumatization of the maxillary sinus, difficult the prosthetic rehabilitation supported by conventional implants due to the shortage of vertical bone availability. So that over the years they have designed therapeutic alternatives to help overcome these drawbacks. The zygomatic implant was introduced in 1988 by Branemark. This implant has a design which allows it to be positioned over the ridge to the height of the first molar, reducing vestibular cantilever up to 20 percent and reducing complications of peri-implant inflammation, infection and gingival hyperplasia, which may lead to perforation horizontal process of the palatine bone. The purpose of this review is to determine the success rate of zygomatic implants for rehabilitation of severely atrophied maxillae. A total of 1410 zygomatic implants and 1673 Traditional implants were included in selected articles. Of these 1410 zygomatic Implants, 365 were conventional loading and 1045 were immediately and early loading, these had a success rate of 98.3 percent and 98.7 percent, respectively. Of these 1673 Traditional Implants, 463 were conventional loading and 1210 were immediately and early loading, they had a success rate of 93.9 percent and 97.8 percent, respectively. The overall success rate of zygomatic implants and Conventional implants was 98.6 percent and 96.8 percent, respectively. The rehabilitation of severely atrophied maxilla with fixed prosthesis immediately and conventional loaded by zygomatic implants gives excellent results in the medium term. When comparing traditional treatment modalities, proposals for prosthetic reconstruction of severely atrophied maxilla, the zygomatico implant has the highest success rate over conventional treatments...


La reabsorción severa en sectores posteriores del maxilar, como resultado de la pérdida de dientes junto con el proceso de neumatización del seno maxilar, resulta en una difícil rehabilitación protésica conel apoyo de los implantes convencionales, debido a la escasez de hueso vertical disponible. A lo largo de los años se han diseñado alternativas terapéuticas para ayudar a superar estos inconvenientes. El implante cigomático fue introducido en 1988 por Branemark. Este implante tiene un diseño que permite colocarse sobre la cresta hasta la altura del primer molar, reduciendo el voladizo bucal hasta en un 20 %, con la consecuente reducción de las complicaciones del peri-implantarias, como inflamación, infección y la hiperplasia gingival, que pueden conducir al desarrollo del proceso de perforación horizontal del hueso palatino. El propósito de esta revisión fue determinar la tasa de éxito de los implantes cigomáticos para la rehabilitación del maxilar gravemente atrófico. Un total de 1410 implantes cigomáticos y 1673 implantes tradicionales fueron descritos en los artículos seleccionados. De estos 1410 implantes cigomáticos, 365 eran de carga convencional y 1045 fueron de carga inmediata y temprana, teniendo una tasa de éxito del 98,3 % y 98,7 %, respectivamente. De los 1673 implantes tradicionales, 463 fueron de carga convencional y 1210 fueron de carga inmediata y temprana, presentando una tasa de éxito del 93,9 % y 97,8 %, respectivamente. La tasa de éxito de los implantes cigomáticos y los implantes convencionales fue del 98,6 % y 96,8 %, respectivamente. La rehabilitación del maxilar severamente atrofiado con prótesis fija convencional cargado inmediatamente y por los implantes cigomáticos otorgó excelentes resultados en el mediano plazo. Al comparar las modalidades de tratamiento tradicionales, propuestas para la re-construcción protésica del maxilar severamente atrofiado, el implante cigomático tiene la mayor tasa de éxito respecto a los tratamientos convencionales.


Subject(s)
Humans , Jaw, Edentulous/surgery , Periodontal Atrophy/surgery , Zygoma , Dental Implantation, Endosseous/methods , Dental Implants , Treatment Outcome
4.
Acta odontol. latinoam ; 29(2): 123-129, 2016. tab
Article in English | LILACS | ID: biblio-834216

ABSTRACT

The aim of this study is to evaluate the effects of replacing poorly fitting dentures on patient’s masticatory function, satisfaction and oral healthrelated quality of life. Fourteen patients with conventional maxillary complete dentures and mandibular overdentures retained by two implants bar clip system had their dentures replaced. The laboratory tests for the analysis of masticatory performance were conducted using an “Optocal” food simulator test. Questionnaires were used to evaluate patient satisfaction with dentures and impact of oral health on quality of life. Tests were conducted and questionnaires were administered before and 1, 3 and 6 months after the patient had adapted to the new dentures. Masticatory performance data and satisfaction with dentures (Visual Analogic Scale) were statistically analyzed by ANOVA and Tukey b test, satisfaction with dentures (SATs P) and impact of oral health on quality of life were evaluated using the Wilcoxon and Friedman tests (a=.05). There was no statistically significant improvement in masticatory function after denture replacement, although better outcomes were observed. Satisfaction with dentures and total score obtained using the OHIPedent showed significant improvement. It can be suggested that the potential for grinding food, patient satisfaction and aspects of quality of life improved immediately after denture replacement.


Avaliar os efeitos da substituição de próteses mal adaptadas na função mastigatória, satisfação e qualidade de vida relacionada à saúde bucal do paciente. Quatorze pacientes com próteses totais convencionais maxilares e overdentures retidas por dois implantes mandibulares sistema barra clip e tiveram suas próteses substituídas .Os testes laboratoriais para análise da performance mastigatória foram realizados utilizando um simulador de alimento “Optocal”. Foram utili za dos questionários para avaliar a satisfação com a prótese eo impacto da saúde bucal na qualidade de vida. Os testes foram realizados e os questionários foram aplicados antes, 1, 3 e 6 meses após o paciente ter adaptado às novas próteses. Os dados da performance mastigatória e satisfação com a prótese (EscalaAnalógica Visual) foram analisados estatistica mente por análise de variância e teste de Tukey b, a satisfação com próteses (SATs P) e o impacto da saúde bucal na qualidade de vida foram avaliados pormeio dos testes de Wilcoxon e Friedman (a = 0,05). Não houve melhora estatisticamente significativa na função mastigatória após a troca das próteses, embora melhores resultados foram observados após a substituição. Satisfação com a prótese e a somatória total obtida utilizando o OHIPEdent mostraram melhora significativa. Pode se sugerir que o potencial de trituração dos alimentos, a satisfação do paciente com as novas próteses e aspectos da qualidade de vida melhoraram imediatamente após a substituição da prótese.


Subject(s)
Humans , Male , Adult , Female , Young Adult , Middle Aged , Dental Prosthesis, Implant-Supported , Denture, Overlay , Quality of Life , Analysis of Variance , Brazil , Mastication/physiology , Patient Satisfaction , Data Interpretation, Statistical , Surveys and Questionnaires
5.
Medisan ; 19(4)abr.-abr. 2015. tab
Article in Spanish | LILACS, CUMED | ID: lil-745144

ABSTRACT

Se realizó un estudio descriptivo y transversal de 374 desdentados parciales con disfunción mandibular, quienes acudieron al servicio de prótesis Estomatológica de la Clínica Estomatológica Provincial Docente "Mártires del Moncada" de Santiago de Cuba desde octubre de 2013 hasta igual mes de 2014, para determinar la presencia de ruidos articulares en su articulación temporomandibular. Entre los principales resultados prevalecieron el sexo femenino, el grupo etario de 20-29 años y como manifestaciones clínicas de disfunción articular: el sonido articular en forma de chasquido al inicio y final de la apertura bucal (51,6 y 38,7 %, respectivamente), así como la desviación mandibular (42,4 %)...


A descriptive and cross-sectional study of 374 partially edentulous patients with mandibular dysfunction who assisted the Stomatological Prosthesis Service from "Mártires del Moncada" Teaching Provincial Stomatological Clinic in Santiago de Cuba was carried out from October, 2013 to the same month of 2014, to determine the presence of articular sounds in their temporomandibular joints. Among the main results there were the female sex, the age group 20-29 and as clinical manifestations of articular dysfunction: the articular sound in crack form at the beginning and end of the oral opening (51.6 and 38.7%, respectively), as well as the mandibular deviation (42.4%)...


Subject(s)
Temporomandibular Joint , Jaw, Edentulous, Partially
6.
Medisan ; 19(4)abr. 2015. tab
Article in Spanish | CUMED | ID: cum-59626

ABSTRACT

Se realizó un estudio descriptivo y transversal de 374 desdentados parciales con disfunción mandibular, quienes acudieron al servicio de prótesis Estomatológica de la Clínica Estomatológica Provincial Docente Mártires del Moncada de Santiago de Cuba desde octubre de 2013 hasta igual mes de 2014, para determinar la presencia de ruidos articulares en su articulación temporomandibular. Entre los principales resultados prevalecieron el sexo femenino, el grupo etario de 20-29 años y como manifestaciones clínicas de disfunción articular: el sonido articular en forma de chasquido al inicio y final de la apertura bucal (51,6 y 38,7 por ciento, respectivamente), así como la desviación mandibular (42,4 por ciento)(AU)


A descriptive and cross-sectional study of 374 partially edentulous patients with mandibular dysfunction who assisted the Stomatological Prosthesis Service from Mártires del Moncada Teaching Provincial Stomatological Clinic in Santiago de Cuba was carried out from October, 2013 to the same month of 2014, to determine the presence of articular sounds in their temporomandibular joints. Among the main results there were the female sex, the age group 20-29 and as clinical manifestations of articular dysfunction: the articular sound in crack form at the beginning and end of the oral opening (51.6 and 38.7 percent, respectively), as well as the mandibular deviation (42.4 percent)(AU)


Subject(s)
Humans , Male , Female , Young Adult , Adult , Middle Aged , Temporomandibular Joint/pathology , Temporomandibular Joint Dysfunction Syndrome , Jaw, Edentulous, Partially , Xenarthra , Epidemiology, Descriptive , Cross-Sectional Studies
7.
Int. j. odontostomatol. (Print) ; 8(3): 329-335, dic. 2014. ilus
Article in English | LILACS | ID: lil-734708

ABSTRACT

Biomechanical measurements show that tilted implants, when part of a prosthetic support, avoid the use of distal cantilever units. This study included 20 women (78%) and 12 men (22%), aged over 50 years old (89%), with a total of 156 implants. A delayed occlusal loading protocol was used and the average distal implant length and diameter were 10 mm and 4 mm respectively. Patients were followed up for 2 to 5 years after prosthesis connection. The aims of this study are to analyze the use of tilted implants in prosthetic rehabilitation of maxillae to reduce cantilevers length, and to study the biomechanical implications of implant-bone interface.


Mediciones biomecánicas demuestran que los implantes inclinados, cuando son parte de un soporte de prótesis, evitan el uso de unidades distales en voladizo. Se incluyeron 20 mujeres (78%) y 12 hombres (22%), mayores de 50 años (89%), con un total de 156 implantes. Se utilizó un protocolo de carga oclusal retardada, y la longitud y el diámetro promedios del implante a nivel distal distal, fue de 10 mm y 4 mm, respectivamente. Los pacientes fueron seguidos durante 2 a 5 años después de la conexión de la prótesis. El objetivo de este estudio consiste en analizar el uso de los implantes inclinados en la rehabilitación protésica de maxilares para reducir la longitud de los voladizos, y estudiar las implicaciones biomecánicas de la interfase hueso-implante.

8.
Article in Spanish | LILACS | ID: lil-708828

ABSTRACT

En esta comunicación se presenta una técnica simplificada de rehabilitación del desdentado total por medio de prótesis removible en que solamente en tres citas clínicas se logra el objetivo del tratamiento. Este logro es posible de ser llevado a cabo por medio del uso de un material fotopolimerizable con el que se realiza la cubeta individual directamente en boca, sin la confección de modelos preliminares, permitiendo de este modo efectuar la toma de impresiones preliminares, definitivas y relaciones intermaxilares en una sola sesión.


In this paper we present a simplified rehabilitation technique for the edentulous through removable prosthesis that achieve the goal of the treatment in only three clinical appointments. This accomplishment is possible through the use of a photopolymerizable material, performing an impression tray directly in the mouth without making any preliminary models; it thereby enables to take preliminary and definitive impressions, and intermaxillary relations in a single session.


Subject(s)
Humans , Male , Jaw, Edentulous/therapy , Denture, Complete , Dental Implantation/methods , Jaw, Edentulous/rehabilitation , Dental Impression Technique
10.
Int. j. odontostomatol. (Print) ; 7(3): 465-470, Dec. 2013. ilus
Article in Spanish | LILACS | ID: lil-696579

ABSTRACT

El uso de la telerradiografía lateral ha tomado gran importancia en Rehabilitación Oral ayudando al clínico en el diagnóstico y planificación del tratamiento a través de la identificación del biotipo facial del paciente, la inclinación del plano oclusal, la relación anteroposterior entre maxilar y mandíbula, inclinación de los ejes dentarios y como ayuda complementaria en casos de alteraciones de la Dimensión Vertical. El problema surge cuando estamos frente a pacientes desdentados que han perdido puntos de referencia cefalométricos necesarios para el análisis. El presente trabajo muestra una técnica para poder visualizar radiográficamente el plano oclusal y la guía anterior utilizando láminas de plomo.


The use of lateral cephalometric radiographs has become very important in Oral Rehabilitation, helping the clinician in the diagnosis and treatment planning through the identification of facial biotype, occlusal plane inclination, sagittal relationship between maxilla and mandible, inclination of the dental axes, and a valuable help in assessing alterations of the vertical dimension of occlusion. The problem arises when treating partially edentulous patients who have lost their cephalometric reference points necessary for the analysis. This paper shows a technique to visualize the occlusal plane and anterior guidance in partially edentulous patients who have lost these anatomical landmarks in a lateral cephalometric radiograph, using lead sheets.


Subject(s)
Humans , Male , Female , Middle Aged , Jaw, Edentulous, Partially/pathology , Jaw, Edentulous, Partially , Dental Occlusion , Teleradiology , Vertical Dimension , Cephalometry
11.
Arch. oral res. (Impr.) ; 8(2): 103-109, maio-ago. 2012. ilus, tab
Article in English | LILACS, BBO - Dentistry | ID: lil-706358

ABSTRACT

Objective: To assess the sequelae of unilateral chewing on muscles of mastication via comparing the approximatemuscular volume (AMV) of the masseter (MM), medial pterygoid (MPM), temporalis (TM),superior and inferior lateral pterygoid muscles (SLPM/ILPM) bilaterally using MRI. Materials and methods:Twenty patients (16 females and 4 males) were selected from outpatient dental clinics of Kaser AlAini Hospitals, Cairo University, complaining from being unilaterally edentulous for one year or more. Alsosix fully dentate individuals (2 males and 4 females) were selected as control group. Magnetic ResonanceImaging (MRI) of the masticatory muscles was performed followed by measuring the approximate musclevolume (AMV) for each muscle bilaterally using the planimetry method. Results: Showed increase in theapproximate muscular volume (AMV) of the dentate side in both right side and left side edentulous patients.Conclusion: Our study shows the effect of long term unilateral chewing on decreasing the AMV in the nonfunctioningside, suggesting that measuring the approximate masticatory muscle volume using MRI couldbe helpful in detection of long-term functional disability of each muscle in comparison to adjacent muscles.


Objetivo: Avaliar as sequelas da mastigação unilateral sobre os músculos da mastigação por meio da comparaçãodo volume aproximado muscular (AMV) do músculo masseter (MM), pterigóideo medial (MPM), temporal(TM), músculos pterigóideos laterais superior e inferior (SLPM/ILPM) bilateralmente usando ressonânciamagnética. Materiais e métodos: Vinte pacientes (16 mulheres e 4 homens) foram selecionados a partir deambulatórios odontológicos do Hospital Kaser Al Aini, Universidade do Cairo; todos os participantes eram unilateralmentedesdentados há um ano ou mais. Também, seis indivíduos totalmente dentados (2 homens e 4mulheres) foram selecionados como grupo controle. Imagem por Ressonância Magnética (RM) dos músculosmastigatórios foi realizada seguido pela medição do volume muscular aproximada (AMV) para cada músculobilateral utilizando o método de planimetria. Resultados: Foi observado aumento no volume aproximadomuscular (AMV) do lado dentado em ambos os lados direito e esquerdo de desdentados laterais. Conclusão:Este estudo mostra o efeito em longo prazo da mastigação unilateral na diminuição da AMV no lado nãofuncional, o que sugere que a medição do volume muscular mastigatório aproximado usando ressonânciamagnética pode ser útil na detecção de deficiência funcional de cada músculo em comparação com músculosadjacentes em longo prazo.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Anodontia/physiopathology , Mastication/physiology , Masticatory Muscles/physiopathology , Analysis of Variance , Magnetic Resonance Spectroscopy
12.
ROBRAC ; 18(47)jan. 2010. ilus, tab
Article in Portuguese | LILACS | ID: lil-558298

ABSTRACT

A prótese parcial removível (PPR) de recobrimento oclusal, também conhecida como PPR overlay, se caracteriza por recobrir a face oclusal de um ou mais dentes, podendo até mesmo recobrir as oclusais de todos os dentes posteriores e as incisais dos dentes anteriores para apoio ou sustentação. O presente trabalho teve como objetivo revisar os princípios envolvidos na sua indicação clínica, planejamento e execução, com o objetivo de discutir a viabilidade clínica e efetividade deste tipo de tratamento, identificando suas indicações, vantagens e desvantagens através da apresentação de casos clínicos. Concluiu-se que a PPR overlay pode ser indicada como alternativa de tratamento para situações especiais de arcadas parcialmente desdentadas, em pacientes com necessidade de alteração da dimensão vertical e/ou realinhamento do plano oclusal, podendo ser empregada como tratamento temporário ou definitivo. Apresenta como vantagens principais a maior simplicidade do tratamento, reversibilidade e custo relativamente baixo. No entanto, estudos adicionais são necessários para assegurar a viabilidade clínica e efetividade deste tipo de tratamento.


Overlay removable partial denture (RPD) is a prosthesis that recovers and uses for support, the occlusal surface of teeth, or even the occlusal of all posterior teeth and incisal edge of the anterior teeth. This review presents and discusses clinical and technical aspects involved in treatment with overlay partial dentures. It was concluded that overlay RPD can be indicated as an alternative treatment for partially edentulous patients who present reduced vertical dimension and changes of the occlusal plan. Treatment may be a definitive or temporary solution. The main advantages of overlay RPD are technical simplicity, reversibility and relative low cost. However, additional studies are needed to assure clinical viability and effectiveness of this treatment.

13.
Odonto (Säo Bernardo do Campo) ; 17(34): 19-26, jul.-dez. 2009. ilus, tab, graf
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-542862

ABSTRACT

Objetivo: Comparar, no plano horizontal, as posições mandibulares determinadas por dois métodos de registro para determinação da posição de relação central (RC): inclinação da cabeça para trás (IC) os métodos guiado não forçado (GNF), em pacientes edêntulos. A hipótese nula é de que não haverá diferença entre os dois métodos. Material e Método: 20 pacientes desdentados totais foram selecionados para este estudo (n=20). Todos pacientes foram manipulados para posição de RC utilizando os métodos IC e GNF. A mensuração da posição de RC determinada por cada método foi registrada em um dispositivo extra-oral, cujas componentes foram fixados nos planos de orientação maxilar e mandibular. Para cada paciente, as duas posições de RC foram registradas no mesmo dispositivo extra-oral. Para mensurar as variações ânteroposteriores e laterais entre os pontos registrados por cada técnica, foi utilizado um projetor de perfil (Modelo 6C, Nikon/ USA). Os dados (mm) foram analisados estatisticamente utilizando o teste T (p<0.05) e o teste de correlação de Pearson. Resultados: A diferença entre a posição de RC obtida pelos métodos na posição ântero-posterior diferiu estatisticamente de zero (p=0.001) e que não houve diferença significante (p=0,479) quando comparada as posições de RC em relação à linha média: UHM (0,56±0,35mm) e IHB (0,65±0,52mm). Não foi observada correlação linear de Pearson entre as medidas lineares antero-posteriores e laterais dos métodos estudados (r=0,26; p=0,268>0,05). Conclusão: Pode-se concluir que método GNF gerou uma retrusão mandibular maior que o método IC.


Objective: To compare, in the horizontal plane, the mandibular positions determined by two methods for registering the centric relation (CR): inclination of the head backward (IHB) and unstrained hinging movement (UHM), in edentulous patients. The null hypothesis was that there is not difference between the two methods. Material and Methods: Twenty edentulous subjects were selected for this study (n=20). All patients were manipulated to CR position using the methods IHB and UHM. The CR measure of each method was registered in one extraoral device, which was fixed at the maxillary and mandibular record bases. For each patient, the two CR positions were registered in the same extraoral device. To measure the anteroposterior and lateral linear variations between the points registered for each technique, it was used a profile projector (Model 6C, Nikon/USA). The data (μm) were statistically analyzed using the Tukey test (p<0.05) and Pearson correlation test. Results: The difference between CR position obtained by the methods in anteroposterior position differed statically from zero (p=0.001) and that there was no significant difference (p=0.479) when compared the CR positions with the medium line: UHM (0.56±0.35ìm) and IHB (0.65±0.52ìm). It wasn’t observed Pearson linear correlation between the anteroposterior and lateral linear measures of the methods (r = 0.26; p = 0.268>0.05). Conclusion: It can be conclude that the method UHM presented a higher mandibular retrusion than the method IHB.


Subject(s)
Humans , Adult , Middle Aged , Mouth, Edentulous , Dental Occlusion , Mandible/anatomy & histology , Maxilla/anatomy & histology , Centric Relation
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