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1.
Skin Res Technol ; 30(4): e13681, 2024 Apr.
Article in English | MEDLINE | ID: mdl-38584576

ABSTRACT

OBJECTIVE: Safe, effective, and biocompatible minimally invasive procedures with the potential to stimulate collagen production have been made to recover dermal thickness and skin quality. The main of this animal model experiment was to observe the effect of poly-L-lactic acid (PLLA) and polydioxanone (PDO) biostimulators in collagen I and III after hypodermal injection. METHODOLOGY: Sixteen adult female rats (Wistar) were randomized into four groups and had dorsal treatment with: G1: hypodermic subcision (HS) only; G2: HS and PLLA hypodermic injection (HI), G3: HS and PDO HI; G4: Control, with no treatment. RESULTS: In histochemical, it was observed hypodermal and dermal tissue in more organized thickness in G3 and in G4 when compared to G1 and G2. There was few difference in G1 compared to G4. The tissue of G2 showed irregularities in the arrangement of collagen fibers, less defined structure and lower distribution of type I collagen compared to the other groups. There is a greater tendency for the proportions of type III collagen among tissues treated with both biostimulators (G2 and G3). PLLA and PDO had relatively similar percentages of collagen when compared to G4. The amount of type I collagen was higher in tissues treated with subcision, while type III collagen was higher in tissues treated with both biostimulators. CONCLUSION: G3 showed better performance in collagen production, although small, when compared with G2.


Subject(s)
Collagen Type I , Polydioxanone , Polyesters , Rats , Female , Animals , Polydioxanone/pharmacology , Collagen Type III , Rats, Wistar , Collagen
2.
ImplantNewsPerio ; 3(1): 138-146, jan.-fev. 2018.
Article in Portuguese | LILACS, BBO - Dentistry | ID: biblio-881731

ABSTRACT

O crescimento das situações estressantes, associado a outros fatores agravantes, tem tornado as Disfunções Temporomandibulares (DTM) foco de diversas pesquisas e intervenções clínicas. As incorreções oclusais, musculares e comportamentais podem alterar o sistema estomatognático, prejudicando a saúde periodontal, dental e dos demais tecidos bucais, e comprometendo os trabalhos clínicos já realizados. A compreensão dessa patologia deve ser de conhecimento do cirurgião-dentista, especialmente daquele que vai realizar reabilitações bucais implantossuportadas. O controle da DTM pode ser primordial para o sucesso do tratamento planejado. Condições diagnósticas e comportamentais do paciente podem orientar as propostas terapêuticas do profi ssional, e essa tem sido cada vez mais uma realidade para o controle das situações sintomáticas relacionadas às DTM. Fatores inerentes ao diagnóstico são relevantes na condução terapêutica, e somente através de procedimentos sistemáticos e bem estruturados é possível obter dados que assegurem organizar a intervenção necessária ao manejo das DTM. Neste artigo descrevemos alguns procedimentos adotados em nossa conduta clínica para o diagnóstico das DTM, ao mesmo tempo em que abordamos algumas modalidades de intervenção terapêutica, com uma visão voltada à terapia baseada em evidências.


The stressful situations associated with other aggravating factors has made Temporomandibular Disorders (TMD) the focus of several researches and clinical interventions. Occlusal, muscular and behavioral disturbance may alter the stomatognathic system, compromising periodontal, dental and other oral tissues health, as well as some clinical work already done. The understanding of this pathology should be relevant to the dentist, especially when it will be performed supported implant rehabilitations. Control of TMD may be critical to the success of planned treatment. Diagnostic conditions and behavioral understanding of the patient may guide the therapeutic proposals, and it has been an increasingly reality for the control of TMD symptomatic situations. Factors inherent to the diagnosis are relevant in the therapeutic conduction, and it is only through systematic and well structured procedures the data can be obtained to organize the necessary intervention for TMD management. In this article, we describe some of the procedures adopted in our clinical management for the diagnosis of TMD, while addressing some modalities of therapeutic intervention, with a vision focused on evidence-based therapy.


Subject(s)
Humans , Male , Female , Facial Pain/drug therapy , Facial Pain/etiology , Temporomandibular Joint Disorders/diagnosis , Temporomandibular Joint Disorders/therapy
3.
Int. j. odontostomatol. (Print) ; 9(1): 149-152, Apr. 2015. ilus
Article in English | LILACS | ID: lil-747491

ABSTRACT

Maxillary reconstruction is a common procedure in maxillofacial surgery; for this purpose is used autogenous bone, alloplastic bone or another one with different results. In all of them, traditionally the use of computed tomography is used to make the surgical plan, however, 3D models are not used frequently. This report show a new application of the stereolithography to anticipate the surgical treatment of maxillary reconstruction, using a titanium mesh and rhBMP-2 to obtain a predictable surgical result with diminished surgical time.


La reconstrucción maxilar es un procedimiento común en cirugía maxilofacial; para este propósito es utilizado hueso autógeno, hueso aloplástico u otro tipo de hueso con diferentes resultados. En todos ellos, tradicionalmente el uso de tomografía computadorizada se emplea para elaborar el plan quirúrgico, sin embargo, los modelos 3D no son utilizados con frecuencia. Este reporte presenta una nueva aplicación de la estereolitografia para anticipar el tratamiento quirúrgico de la reconstrucción maxilar, usando una malla de titanio y rhBMP-2 para obtener un resultado quirúrgico predecible con disminución del tiempo quirúrgico.


Subject(s)
Humans , Titanium , Alveolar Ridge Augmentation , Surgical Mesh , Tomography, X-Ray Computed , Transforming Growth Factor beta , Bone Morphogenetic Protein 2 , Alveolar Process , Stereolithography
4.
Int. j. odontostomatol. (Print) ; 9(1): 107-111, Apr. 2015. ilus
Article in English | LILACS | ID: lil-747486

ABSTRACT

The aim of this study was to analyse the in vitro the stress distribution in craniofacial structures around zygomatic implants. Synthetic polyurethane skulls replicas were used as templates for installation of standard and zygomatic implants performing two techniques using rehabilitation with using one zygomatic implant in the right and left side in combination with 2 and 4 standard implants in the anterior maxilla (group 1 and group 2). The skull replicas of photoelastic resin were subjected to photoelastic analysis after linear loading using an Instron 4411 servohydraulic mechanical testing, with a 2 mm displacement. The stress distribution showed the fringes with concentration in the body and the frontal process of zygomatic bone. In the case of model 1, higher concentrations of stress were found around the standard and zygomatic implants and surrounding bone. Under this condition, the rehabilitation with 2 zygomatics implants and 4 standard implants (group 2) provided the most favorable behavior.


El objetivo de este estudio fue analizar el estrés in vitro y la distribución de tensiones en la estructura craneofacial a partir de los implantes cigomaticos. Réplicas de cráneo de poliuretano fueron usados como modelos para la instalación de implantes cigomáticos estándar utilizando dos modelos de distribución de implantes. Estos modelos fueron usados como modelos utilizando 1 implante en cada lado con dos o cuatro implantes convencionales en la región anterior maxilar (grupo 1 y grupo 2); posteriormente, se realizó una carga compresiva unilateral en la máquina Instrom 4411 utilizando 2 mm de desplazamiento máximo. La distribución de estrés se concentró principalmente en la región de cuerpo de hueso cigomático y en la región frontal del proceso cigomático; el modelo 1, con dos implantes convencionales, mostró mayor distribución de estrés en la región cigomática al comparase con el grupo 2; bajo estas condiciones, se concluye que la distribución con cuatro implantes convencionales entrega mejores condiciones de distribución de tensiones.


Subject(s)
Humans , Tooth Mobility , Zygoma/surgery , Dental Implants , Atrophy/pathology , Zygoma/anatomy & histology , Computer-Aided Design , Maxilla/surgery
5.
Int. j. morphol ; 33(1): 327-332, Mar. 2015. ilus
Article in English | LILACS | ID: lil-743805

ABSTRACT

Dental implant and chin osteotomy are executed on the mandible body and the mental nerve is an important anatomical limit. The aim of this research was to know the position of the mental nerve loop comparing result in panoramic radiography and cone beam computed tomography. We analyzed 94 hemimandibles and the patient sample comprised female and male subjects of ages ranging from 18 to 52 years (mean age, 35 years) selected randomly from the database of patients at the Division of Oral Radiology at Piracicaba Dental School State University of Campinas; the anterior loop (AL) of the mental nerve was evaluated regarding the presence or absence, which was classified as rectilinear or curvilinear and measurement of its length was obtained. The observations were made in the digital panoramic radiography (PR) and the cone beam computed tomography (CBCT) according to a routine technique. The frequencies of the AL identified through PR and CBCT were different: in PR the loop was identified in 42.6% of cases, and only 12.8% were bilateral. In contrast, the AL was detected in 29.8% of the samples using CBCT, with 6.4% being bilateral; Statistical comparison between PR and CBCT showed that the PR led to false-positive diagnosis of the AL in this sample. According to the results of this study, the frequency of AL is low. Thus, it can be assumed that it is not a common condition in this population.


Implantes dentales y la osteotomía de mentón son realizadas en el cuerpo mandibular y el nervio mental es un importante limite anatómico. El objetivo de esta investigación es conocer la posición del bucle del nervio mental comparando resultados entre radiografia panorámica y tomografía computadorizada de haz cónico (TCHC). Fueron analizadas 94 hemimandíbulas; la muestra de pacientes de sexo feminino y masculino con edades fluctuando entre 18 y 52 años (edad media, 35 años) seleccionados de la base de datos de pacientes de la División de Radiología de la Facultad de Odontología de Piracicaba, Universidad Estadual de Campinas; el bucle anterior (BA) del nervio mental fue evaluado según su presencia o ausencia, el cual fue clasificado como rectilíneo o curvilíneo obteniéndose el largo total del bucle; las observaciones fueron realizadas en radiografías panorámicas digitales (RP) y en TCHC de acuerdo a técnicas de rutina. La frecuencia de identificación del BA en RP y TCHC fue diferente: en la PR, el BA se identificó en un 42,6% de los casos y solo el 12,8% fue bilateral. En contraste, el BA fue detectado en el 29,8% de la muestra utilizando TCHC, con un 6,4% bilateral; la comparación estadística entre RP y TCHC muestra que la RP lleva a diagnósticos falsos positivos de la muestra de BA. De acuerdo con los resultados de este estudio, la frecuencia de BA es baja. Por este motivo se puede asumir que esta es una condición anatómica poco frecuente en la población estudiada.


Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Cone-Beam Computed Tomography , Mandible/diagnostic imaging , Mandibular Nerve/diagnostic imaging , Radiography, Panoramic , Chin/innervation , Mandible/innervation , Mandibular Nerve/anatomy & histology
6.
Int. j. morphol ; 32(4): 1472-1476, Dec. 2014. ilus
Article in Spanish | LILACS | ID: lil-734701

ABSTRACT

La regeneración ósea en reconstrucción del proceso alveolar junto al uso de implantes oseointegrables son ampliamente utilizados, existiendo una amplia variabilidad de productos. El objetivo de esta investigación es estudiar la reparación ósea asociada a un sustituto óseo a base de sulfato de calcio cubierto con membrana biológica en defectos creados en tibia de conejos. Se seleccionaron 12 conejos de entre 3 y 6 meses para ser intervenidos; de acuerdo a protocolos de anestesia ya conocidos se realizó la técnica con acceso a ambas tibias donde se realizaron 2 defectos de 2,6 mm de diámetro; se formaron cuatro grupos siendo el grupo I de relleno con coágulo sanguíneo, grupo II relleno con coagulo cubierto con membrana de colágeno, grupo III relleno con sulfato de calcio y grupo IV relleno con sulfato de calcio cubierto con membrana biológica. Se realizó la eutanasia a los 21 y 42 días y posteriormente se procedió a procesar y analizar láminas histológicas con tinción de hematoxilina y eosina. Se realizó la histomorfometría comparativa analizando los datos con prueba ANOVA y prueba de Turkey considerando un valor de p<0,05 para significancia estadística. Los resultados demostraron que todos los defectos mostraron patrones regulares de reparación ósea; los grupos rellenados con coágulo mostraron formación ósea estadísticamente menor que el presentado por los defectos rellenos con el sulfato de calcio, aunque estos últimos presentaron mayores indicadores de presencia de proceso inflamatorio; el grupo IV fue el que presentó los mejores niveles de reparación ósea a los 21 y 42 días. Se concluye que la reparación ósea en defectos menores es viable de ser realizada con este biomaterial y que la cobertura con membrana de colágeno puede ser útil en la regeneración ósea guiada.


Bone regeneration in the alveolar process and dental implant are widely used and there are a lot of different products. The aim of this research was to know the bone reparation associated to bone substitute with calcium sulfate and a biological membrane in created defects in rabbit tibiae. Were selected 12 rabbit between 3 and 6 month to be operated; using previous anesthesia protocols was do it a surgical defect in the right and left tibiae with 2.6 mm diameter; four groups were created: group I with blood clot fill, group II with blood clot fill plus biological membrane, group III with calcium sulfate and group IV with calcium sulfate plus biological membrane. The euthanasia was made in 21 and 42 days before surgery and was obtained histological plate using hematoxillin and eosin. The histomorphometry was made and statistical analysis using ANOVA and Turkey test with p<0.05 to obtain statistical differences. Were observed in the all created defects a regular bone reparation; the group I and II, with blood clot, showed a minor bone reparation than group III and IV with calcium sulfate, but these last one show an important inflammatory process; the group IV presented the better results at 21 and 42 euthanasia days in term of bone formation. It´s conclude that calcium sulfate can be used in bone reparation of minor defects and the biological membrane can be used in guide bone regeneration with success.


Subject(s)
Animals , Female , Rabbits , Tibia/surgery , Tibia/injuries , Calcium Sulfate/therapeutic use , Bone Substitutes/therapeutic use , Biocompatible Materials , Calcium Sulfate/chemistry , Bone Substitutes/chemistry
7.
Int. j. morphol ; 30(1): 130-135, mar. 2012. ilus
Article in English | LILACS | ID: lil-638773

ABSTRACT

The purpose of this research was to compare the bone formation around submerged and non-submerged implants installed in a mandible of dog. Seven beagle dogs were used in this protocol; initially, was performed extraction of posterior teeth of mandible and after 3 month healing were installed two dental implants with surface treatment (subtraction of titanium via acidification) in each hemimandible. A transmucosal healing screw of 7 mm without oclusal contact was installed at the anterior implant as a model of non-submerged implant; in the posterior implant were installed a cover screw, using the submerged technique. After six weeks of healing, histomorphometric analysis of osseous tissue between the threads was performed. Was analyzed the implant unit as well as the cervical, meddle and apical region of implant. Student t test with 5 percent significance was used. The non-submerged implant model showed more bone formation than submerged implant without statistically significance (p=0.106); for regional analyses, cervical area shows more osseous formation than middle and apical areas. The regional analyses did not present statistical difference between areas for comparative analysis of submerged and non-submerged implant model. Non-submerged implant model it's not an obstacle for osseous formation.


El objetivo de esta investigación fue comparar la formación ósea alrededor de implantes dentales sumergidos y no sumergidos instalados en mandíbula de perro. Siete perros Beagle fueron utilizados en este protocolo; inicialmente fueron realizadas las exodoncias de dientes posteriores de mandíbula y luego de 3 meses de recuperación fueron instalados dos implantes dentales con tratamiento de superficie en cada hemimandíbula (substracción de titanio vía acidificación). En el implante anterior fue instalado también un conector transmucoso de 7 mm sin contacto oclusal y en el implante posterior fue instalado el tornillo de cierre. Luego de 6 semanas de recuperación, se realizó un análisis histomorfométrico del tejido óseo presente entre las roscas. Se analizó el implante como unidad así como también sus sectores cervical, medio y apical. Se utilizó la prueba estadística t de student con 5 por ciento de significancia estadística. El implante no sumergido presentó mayor formación ósea sin diferencias estadísticamente significativa (p=0.106); en los análisis regionales, el área cervical presentó mayor formación ósea que las áreas medianas y apicales. El análisis regional no presentó diferencias estadísticamente significativas entre ambos tipos de implante. El modelo de implante no sumergido no es un obstáculo para la formación ósea.


Subject(s)
Dogs , Bone Development , Dental Implants , Bone and Bones/anatomy & histology , Bone and Bones/blood supply , Bone and Bones/ultrastructure , Dogs/anatomy & histology
8.
Int. j. morphol ; 29(4): 1219-1222, dic. 2011. ilus
Article in Spanish | LILACS | ID: lil-626992

ABSTRACT

La elevación de piso sinusal maxilar ha sido ampliamente discutida y presenta altas tasas de éxito. El objetivo de esta investigación fue establecer la prevalencia de septum intrasinusal presente en cirugías consecutivas de elevación de piso sinusal y establecer su relación con las perforaciones de membrana sinusal. Noventa y un cirugías fueron realizadas en pacientes que presentaban indicación para instalar implantes dentales en maxila posterior; fueron incluidos aquellos pacientes que presentaron documentos clínicos íntegros (ficha clínica, radiografías, entre otros) y que no presentasen contraindicación del procedimiento; las cirugías fueron realizadas con anestesia local o general y fueron rellenados con biomateriales o hueso autógeno. El septum fue identificado mediante la imagen panorámica preoperatoria y de forma clínica intraoperatoria, mientras que cualquier complicación fue estudiada y relacionada con la presencia de septum; el estudio estadístico se realizó a través de la prueba test de Fisher siendo reconocido el valor de p<0.05. Fueron operados 72 sujetos (53 mujeres y 19 hombres) con una edad promedio de 44,5 años; en el 74,7 por ciento no se observó ningún tipo de complicación, mientras que en el 18,7 por ciento de los casos se observó perforación de la membrana sinusal. Septum sinusal fue observado en el 17,6 por ciento de los casos operados (16 senos maxilares), presentando 12 septum en posición anterior y 4 en posición posterior. La presencia de septum tuvo relación estadísticamente significativa con la laceración de membrana sinusal (p<0,05). Finalmente, podemos señalar que la presencia de septum intrasinusal se observó en 17 por ciento de los casos y se relaciona directamente con complicaciones intraoperatorias como la perforación de membrana.


Sinus lift has been widely studied and is highly successful. The aim of this research was to establish the prevalence of intrasinusal septum in consecutive surgeries for maxillary sinus floor elevation and identify the relation with sinus membrane rupture. Ninety one surgeries were realized in patients with an indication for dental implant installation in the posterior maxilla; the patient with complete clinical and medical record (card, radiography, etc.) and without contraindications for the procedure was included in the study; the surgery was realized with local or general anesthesia and the material used for inlay graft was autogenous bone or biometarials. The septum was identified by panoramic image in the preoperatory and clinically at the time of surgery; any complication was studied and related to intrasinusal septum; the statistical study was carried out with Fisher test with p value <0.05. Surgery was performed on 72 subjects (53 female and 19 male) with a mean age of 44.5 years of age; in 74.7 percent of patients no complications were observed, while 18.7 percent presented sinusal membrane rupture. The septum was observed in 18.7 percent (16 maxillary sinus), showing 12 septum in anterior position and 4 in posterior position; the presence of septum was positively related to membrane rupture (p<0.05). Finally, we can state that the intrasinusal septum was observed in 17 percent and was related to intraoperatory complications as membrane rupture.


Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Sinus Floor Augmentation/adverse effects , Maxillary Sinus/pathology , Maxillary Sinus , Prevalence , Radiography, Panoramic , Retrospective Studies , Maxillary Sinus/surgery
9.
Int. j. odontostomatol. (Print) ; 4(3): 285-290, dic. 2010. ilus
Article in Spanish | LILACS | ID: lil-594267

ABSTRACT

La migración de caninos inferiores es un fenómeno poco común. Su incidencia es menor que incluidos maxilares y son frecuentemente encontrados en jóvenes. Solamente caninos, segundos premolares y terceros molares incluidos migran a lugares ectópicos en su desarrollo y dientes incluidos ectópicos son, en la mayoría de los casos, asintomáticos. La etiología es compleja y poco descrita en la literatura. Un canino es considerado un diente migrado cuando, horizontalmente, más de la mitad del diente atraviesa la línea mediana. Este artículo reporta un caso clínico, con tratamiento quirúrgico de exodoncia de caninos bilaterales incluidos, horizontalmente en la región de la sínfisis. Se observó que la exodoncia es la conducta operatoria más frecuente, presentando en este caso buenos resultados.


Migration of canine mandibles is a very uncommon phenomenon. Their incidence is less frequent than maxillary canines and present frequently in young people. Only canines, second bicuspid and third molars can migrate to ectopic areas in their development and ectopic embedded teeth are, for the most part asymptomatic. The etiology is complex and with poor information. A canine is considered a migrating tooth when it penetrates horizontally the middle line of the mandible. This paper reports a case with surgical treatment of dental extraction, including horizontal bilateral canines in the symphysis region. It was observed that dental extraction is a more frequent treatment and presented with good results in this case.


Subject(s)
Humans , Adult , Female , Cuspid/surgery , Tooth, Unerupted/surgery , Tooth Eruption, Ectopic/surgery , Tooth Migration/complications , Tooth Eruption, Ectopic/etiology , Mandible , Surgery, Oral , Treatment Outcome
10.
Rev. Assoc. Paul. Cir. Dent ; 64(2): 146-149, mar.-abr. 2010.
Article in Portuguese | LILACS, BBO - Dentistry | ID: biblio-874224

ABSTRACT

Uma das preocupações constantes do ser humano tem sido recuperar as funções que os dentes ofereciam antes de serem perdidos. Os implantes dentários são nos dias atuais uma realidade segura e previsível para aqueles pacientes desdentados que desejam reabilitar sua saúde bucal. Diante disso, o objetivo do presente estudo é avaliar retrospectivamente o índice de complicações trans e pós-operatórias em pacientes submetidos à instalação de implantes dentários osseointegráveis pela área de Cirurgia Bucomaxilofacial da Fop/Unicamp no período de junho de 2001 a julho de 2008. Os resultados mostram que o índice de complicações foi de 13,750f0, sendo 3,600f0 de complicações trans-operatórias e 9,750f0 de complicações pós-opera- tórias, enquanto que houve ausência de complicações em 86,580f0 dos casos tratados e incluídos na amostra. Em conclusão, podemos afirmar que as complicações podem ocorrer em qualquer fase do tratamento e se não tratadas adequadamente, podem ocasionar a perda dos implantes, devendo o cirurgião estar apto a intervir no momento necessário


One of the constant preoccupations of human being has been to recover the functions that the used before been lost. The dental implants are considered nowadays a safe and predictable reality for those toothless patients who desire to rehab buccal health. According to this issue, the actual study is to evaluate retrospectively the index of complications during and after surgeries in patients submitted to an installation of bone integrable dental implants in the Surgery Area of Oral-Maxillo-Facial at Fop/Unicamp in the period of June 2001 to July 2008. The results shown that the index of complications was at 13,750f0, where 3.600f0 of during surgeries complications and 9,750f0 of after surgeries complications, while there were an absence of complications in 86,58% of the treated cases included in the sample. In conclusion, we can affirm that the complications can occur in any phase of the treatment and if not treated rightly they can cause to lose of the implants and surgeon must be capable to intermediate in the necessary moment


Subject(s)
Humans , Male , Female , Dental Implants , Osseointegration/physiology , Postoperative Complications
11.
Int. j. morphol ; 27(2): 407-412, June 2009. ilus, tab, graf
Article in Spanish | LILACS | ID: lil-563086

ABSTRACT

Los implantes dentales han evolucionado de forma sustancial en los últimos 40 años; sin embargo, dudas sobre las características de la reparación ósea continúan toda vez que nuevos diseños y nuevos métodos quirúrgicos son aplicados. El objetivo de esta investigación es evidenciar la presencia de tejido mineralizado en diferentes regiones del implante. Se elaboró un estudio basado en un modelo de restauración inmediata, aplicado en la mandíbula de 7 canes machos. Se realizaron las exodontias de los premolares mandibulares y, después de 3 meses de recuperación, se instalaron 2 implantes endóseos bilaterales, siendo uno de tipo cónico y otro de tipo cilíndrico. Después de dos periodos de sacrificio se realizo una evaluación histomorfométrica en los cortes seleccionados. Los resultados se presentan de forma porcentual estableciendo comparaciones entre las áreas cervical, media y apical. Los implantes de morfología cónica sometidos al modelo de restauración inmediata, presentaron mayor formación ósea en todos los niveles evaluados. En todas las condiciones de trabajo el área cervical presentó mayor presencia de tejido mineralizado que el área apical. Concluimos que el modelo de restauración inmediata no es un obstáculo para la instalación de la secuencia apropiada de reparación ósea y que diferentes factores deben estar asociados a la mayor formación ósea presente en el área cervical de los implantes dentales.


Dental implants have evolved of substantial form in the last 40 years; however, doubt about osseous repair characteristic are maintained because new design and surgical method are applied. The aim of this research is show the mineralized tissue in different areas of the implant. Was done a study based to a immediate load model applied in 7 male dogs mandible. Was realized the dental extractions of de bilateral mandibles bicusp and after to 3 month of recuperations was installed two bilaterally implants, been conical and cylindered shape. After of two sacrifices period was realized a histomorphometric analysis in the selection cut. The results are present with perceptual form, establishing cervical, meddle and apical comparison. Conical implants with immediate restoration model were present more osseous formations in all evaluated level. For all conditions of work, cervical area presented more mineralized tissue than apical area. We conclude that immediately restoration model it is not an obstacle for the installation of the appropriate sequence for the osseous reparation and that different factors have been associated to the more osseous formation in the cervical area of the dental implants.


Subject(s)
Male , Adolescent , Animals , Dogs , Dental Implants/veterinary , Osseointegration , Osseointegration/physiology , Dental Restoration, Permanent/methods , Dental Restoration, Permanent/veterinary , Tissue Conditioning, Dental/veterinary , Calcification, Physiologic
12.
Int. j. morphol ; 27(2): 453-458, June 2009. ilus
Article in Spanish | LILACS | ID: lil-563093

ABSTRACT

Los implantes oseointegrados forman parte de la práctica clínica en diferentes disciplinas de la rehabilitación funcional y estética del hombre donde el área de la odontología no es una excepción; de esta forma, los implantes dentales son una respuesta a la gran demanda de paciente con edentulismo parcial o total. Existe una importante y creciente investigación en implantología, siendo imperativo reconocer las características histológicas de la reparación ósea cuando son instalados implantes dentarios. El objetivo de esta investigación es reconocer las características histológicas descriptivas de la reparación ósea asociada a la instalación de implantes dentales en dos periodos de evaluación. El modelo experimental utilizado en este estudio correspondió al de cinco perros sometidos a la exodoncia de premolares mandibulares bilaterales. Después de tres meses fueron instalados implantes bilaterales con dos diseños diferentes y con diferentes protocolos de carga. Los sacrificios de los animales fueron realizados después de tres y seis semanas de instalados los implantes. El estudio histológico descriptivo se desarrolló en el tejido adyacente a implantes instalados con técnica sumergida. Se observaron características de reparación ósea en los dos periodos de evaluación. El periodo de tres semanas presento tejido mineralizado en contacto con el implante y tejido conectivo no mineralizado en aumento desde la región superior hacia la inferior. Las regiones de reparación ósea fueron relacionadas con fenómenos de angiogénesis adyacentes. A las seis semanas se observo una mayor formación ósea, reemplazando las áreas de tejido conectivo no mineralizado por tejido mineralizado. Se observo también tejido óseo maduro con canales de Havers bien constituidos. Concluimos que existe una secuencia biológica de reparación ósea respetada en los dos periodos de evaluación, donde después de seis semanas es posible observar un tejido óseo bien constituido, teóricamente ...


Osseointegrated implants are a part of clinical practice in different areas of the aesthetic and functional human rehabilitation where dentistry is not an exception; being like that, dental implants are a responses to great necessity of patient with partial or total dental lost. Exist an important and crescent research in implantology, being very important to recognize the histological characteristic of the osseous repair when dental implant are installed. The aim of this research was to recognize the histological descriptive characteristic of the osseous repair in two evaluation period. The experimental model in this research was five dogs submitted to dental extraction of mandibular bilateral bicuspid. After three month were installed bilateral implants with two implants design and different load protocols. The animals' sacrifices were realized three and six weeks after implants installation. The histological evaluation was realized in a tissue of implant with submerged techniques. Was observed osseous repair characteristic for two evaluation period. For three weeks period was observed mineralized tissue in contact with implant and non mineralized connective tissue in increase from superior to inferior areas. Reparation areas were related to adjacent angiogenic phenomena. For sex weeks period, was observed a major osseous formation, change connective tissue for mineralized tissue. Was observed too matures osseous tissue with well formed Havers channel. We conclude that exist a biological sequence of osseous repair present for a two evaluation period, where in a sex weeks is observed osseous tissue with good definition, theoretically capable for stress support.


Subject(s)
Male , Animals , Child , Dogs , Bicuspid/anatomy & histology , Bicuspid/surgery , Bicuspid/ultrastructure , Dental Implantation, Endosseous/methods , Dental Implantation, Endosseous/veterinary , Calcification, Physiologic/physiology , Models, Animal , Dogs/anatomy & histology , Connective Tissue/anatomy & histology , Connective Tissue
13.
Int. j. odontostomatol. (Print) ; 2(1): 43-52, jul. 2008. ilus
Article in Spanish | LILACS | ID: lil-545852

ABSTRACT

Las técnicas de implantología actuales, no se limitan a evaluar la instalación de implantes y la rehabilitación protésica, sino que deben abocarse a resolver los problemas integrales de nuestros pacientes. De esta forma, devolver armonía facial perdida debe ser un criterio trascendente en la elección de los tratamientos. Con este principio, la estética se establece como un punto de inicio de nuestras terapias, lo cual lleva obligatoriamente a interrelacionarla con la función del sistema estomatognático. Este artículo tiene como objetivo discutir algunos conceptos asociados a la reconstrucción de maxilares atróficos y establecer su relación con fenómenos de deficiencias dentofaciales. Desarrollamos una revisión de aspectos que consideramos relevantes a la hora de escoger determinados tratamientos y presentamos uno de nuestros casos para ejemplificarlo.


Despite solve the implant installation and prosthesis rehabilitation the actual implant are also used to solve other disorders. This way, restore the facial symmetry lost has to be transcendent criteria when choosing a treatment. With this principle, aesthetic becomes a major point in our therapy, correlating it with the stomatognathic system function. The meaning of the present article is discuss some concepts associated with the reconstruction of the atrophic maxillas and established its relation with dentofacial deformities. It was performed a literature review of some points that we consider relevant when choosing a treatment planning and showing one of ours clinical case to exemplify.


Subject(s)
Humans , Adult , Female , Dental Implantation, Endosseous/methods , Maxilla/surgery , Osteotomy, Le Fort , Alveolar Bone Loss/surgery , Dental Implants , Esthetics, Dental , Mandible/surgery , Osseointegration , Plastic Surgery Procedures/methods , Bone Transplantation/methods
14.
Int. j. odontostomatol. (Print) ; 1(2): 121-127, Dec. 2007. ilus
Article in Spanish | LILACS | ID: lil-533366

ABSTRACT

La reconstrucción de rebordes alveolares atróficos para la rehabilitación con implantes oseointegrados son procedimientos que han demostrado predictibilidad en términos de estabilidad y estética. Diferentes materiales se han utilizados pero, sin duda, son los autoinjertos los que más frecuentemente se asocian al éxito terapéutico. De ellos, el hueso obtenido de sitios donantes intraorales son de elección cuando el defecto está de acuerdo al tamaño del injerto obtenido. El objetivo del presente estudio es evaluar las técnicas quirúrgicas para recolección de hueso de mandíbula y discutir las características generales y particulares asociadas a estos procedimientos quirúrgicos.


Reconstruction of atrophic alveolar ridge for rehabilitation with osseointegrated implants is a predictable procedure that offers excellent esthetic and stable results. Several materials have been used, but autogenous bone grafts continue to be the ones associated with high success rates. Depending on the size of the defect, intrabucal areas are the best donor sites for reconstruction. The aim of this study is to evaluate surgical techniques to collect bone from the jaws and discuss the general characteristics as well as the particularities associated with this type of surgical procedure.


Subject(s)
Humans , Mouth Rehabilitation , Mandible/transplantation , Transplantation, Autologous , Bone Transplantation/methods , Osteotomy/methods
15.
PCL, Rev. Íbero Am. Prótese Clín. Lab. ; 6(33): 493-498, set.-out. 2004. ilus, CD-ROM
Article in Portuguese | BBO - Dentistry | ID: biblio-853100

ABSTRACT

Este artigo descreve uma técnica de confecção de prótese nasal em paciente do sexo feminino, 70 anos, com perda total das estruturas nasais por carcinoma espinocelular. Esta técnica adotou como procedimento a reprodução do nariz em modelina, onde foram esculpidas as configurações anatômicas de interesse. Após moldagem das estruturas faciais remanescentes com hidrocolóide irreversível, foi feito modelo de gesso tipo IV, sobre o qual foi realizado todo o trabalho de escultura da peça protética. Após a prova estética e seleção aproximada da cor base, a peça foi incluída em gesso tipo III e processada com resina acrílica termopolimerizável através de ciclo rápido. As caracterizações de cor e nuanças de sombra foram feitas no interior do molde, com inclusão de pigmentos acrílicos durante inclusão da resina. O resultado estético foi bastante satisfatório e a prótese encontra-se atualmente sob controle


Subject(s)
Aged , Humans , Female , Acrylic Resins , Maxillofacial Prosthesis , Nose , Nose Neoplasms , Eyeglasses , Rehabilitation
16.
Rev. ABO nac ; 10(1): 18-22, fev.-mar. 2002. ilus
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-312794

ABSTRACT

O objetivo deste trabalho foi avaliar a capacidade de regeneraçäo óssea de um enxerto ósseo desmineralizado e liofilizado de origem humana (DEMBONE) em calvária de coelhos. Nove coelhos foram utilizados sendo preparadas duas cavidades ósseas em cada calvária. As cavidades do lado esquerdo foram utilizadas como controle e preenchidas apenas com sangue do animal. As cavidades do lado direito foram preenchidas com o enxerto ósseo. Os animais foram sacrificados nos períodos pós-operatórios de 03, 07 e 15 semanas. A análise das amostras sob microscopia ótica revelou que a neoformaçäo óssea foi favorecida no grupo de estudo


Subject(s)
Bone Transplantation
17.
BCI ; 9(32): 320-323, nov. 2001-jan. 2002. ilus
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-313005

ABSTRACT

O granuloma de células gigantes é uma lesäo de crescimento predominantemente lento, bem circunsctito e assintomático, sendo geralmente diagnosticado através de exame radiográfico de rotina. Esta patologia apresenta comportamento agressivo, expandindo corticais e apresentando um considerável grau de recidiva e potencial de transformaçäo maligna. Os aspectos clínicos, radiográficos e histológicos do granuloma central de células gigantes näo säo patognomônicos, podendo ser confundidos com outras lesöes que acometem os ossos maxilares, se forem analisadas isoladamente. Este relato de caso clínico refere-se a uma paciente portadora de granuloma central de células gigantes que já havia sido submetida a três cirurgias para remoçäo da lesäo sem sucesso do quadro clínico, sendo, entäo, realizada nova remoçäo cirúrgica por curetagem associada à crioterapia para eliminaçäo da patologia


Subject(s)
Female , Adult , Cryosurgery , Cryotherapy , Granuloma, Giant Cell/surgery , Granuloma, Giant Cell/diagnosis , Mandible/surgery
18.
Rev. reg. Aracatuba assoc. paul. cir. Dent ; 22(2): 15-9, jul.-dez. 2001. ilus
Article in Portuguese | BBO - Dentistry | ID: biblio-858876

ABSTRACT

Somente os caninos, segundo pré molares e terceiros molares inferiores inclusos migram para locais distantes do local de seu desenvolvimento. É mais freqüente em pacientes jovens, com idade inferior a 20 anos. Durante o processo de migração o dente pode ocasionar sintomatologia ou passar desapercebido, sendo descoberto ocasionalmente com auxílio de exames radiográficos. Os autores realizaram revista da literatura a partir do ano de 1940. Poucas considerações até 2001 tem fornecido a razão pela qual os dentes migram na mandíbula. A migração de pré molar tem relação com a perda precoce do primeiro pré ou molar adjacente e/ou o germe dental está mal posicionado na mandíbula. Diante das poucas razões encontradas para explicar o porquê os dentes migram, os autores propõem três hipóteses: a primeira poderia estar relacionada com a retração da cartilagem de Meckel, deixando um canal residual com menor densidade óssea ou remanescentes de células. Isolada ou associada à primeira, a segunda seria a direção da osteogênese para distal e mesial a partir da ramificação dos nervos mentoniano e incisivo. Deste modo se explica a migração do segundo pré molar inferior e do canino incluso respectivamente, para distal e mesial. A terceira hipótese estaria associada as primeiras, e a própria morfologia do trabeculado ósseo da mandíbula desde que mantida a integridade do capuz pericoronário e da superfície radicular do dente incluso


Subject(s)
Humans , Male , Female , Adolescent , Adult , Tooth, Unerupted/surgery , Tooth Migration
19.
BCI ; 7(25): 60-3, abr.-jun. 2000. ilus
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-296728

ABSTRACT

As fístulas bucossinusais säo ocorrências comuns e quase sempre estäo relacionadas à remoçäo dos molares superiores, principalmente porque há uma relaçäo anatômica íntima entre o ápice das raízes destes dentes com o seio maxilar. Normalmente uma fístula bucossinusal com menos de 2 mm de diâmetro fecha-se espontaneamente, mas quando este defeito é igual ou maior que 3 mm, ou o seio ou a regiäo periodontal estäo comprometidos por um processo inflamatório ou infeccioso, a abertura persiste freqüentemente. Na literatura há relatos de várias técnicas cirúrgicas para o fechamento de fístula bucossinusal, porém, estes procedimentos nem sempre apresentam resultados satisfatórios. Neste trabalho os autores avaliam o uso do enxerto pediculado com o corpo adiposo bucal para fechamento de fístula bucossinusal, e concluem que o procedimento tem larga aplicaçäo e um alto grau de sucesso


Subject(s)
Humans , Female , Adult , Fat Body , Fistula
20.
Rev. Assoc. Paul. Cir. Dent ; 53(6): 493-7, nov.-dez. 1999. ilus, tab
Article in Portuguese | LILACS, BBO - Dentistry | ID: lil-262490

ABSTRACT

O objetivo deste estudo foi avaliar dois tipos de tratamento de alveolite. Vinte pacientes portadores de alveolite foram selecionados e divididos em dois grupos (A e B), que receberam tratamento com Rifocina M - 75 mg e fita radiotaca à base de eugenol a 20 por cento. Os dois tratamentos mostraram-se eficazes, porém a irrigaçäo com Rifocina M - 75 mg mostrou-se mais prática e confortável, näo havendo diferenças estatisticamente significantes


Subject(s)
Dry Socket , Eugenol/therapeutic use , Rifamycins/therapeutic use
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