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1.
J. appl. oral sci ; 28: e20190409, 2020. graf
Article in English | LILACS, BBO | ID: biblio-1090768

ABSTRACT

Abstract Menopause induces oral bone loss, leading to various oral diseases. Mastication importantly affects bone metabolism in the jawbone. Objective: To analyze the effect of enhanced masticatory force on osteoprotegerin (OPG), receptor activator of nuclear factor kappa B ligand (RANKL), and mechano-growth factor (MGF) in alveolar bone of ovariectomized rats and to study the mechanics mechanism of the alveolar bone of ovariectomized rats response to enhanced masticatory force. Methodology: Thirty Sprague Dawley rats were randomly divided into three groups: sham-operation group (fat around the removed ovary + normal hard diet), model group (ovariectomy + normal hard diet), and experimental group (ovariectomy + high hard diet). It was a 2-month experiment. Enzyme-linked immunosorbent assay (ELISA) detected serum estradiol (E2), osteocalcin (BGP) and alkaline phosphatase (ALP) in rats. Bone histomorphometric indices in the third molar region of maxilla were detected by micro-CT; protein expressions of OPG, RANKL, and MGF in the third molar region of maxilla was detected by Western blot; and gene expression of OPG, RANKL, and MGF in the third molar region of maxilla was detected by Quantitative Real-Time PCR. Results: Comparing with model group, serum E2 in experimental group increased but not significantly, serum BGP and serum ALP in experimental group decreased but not significantly, OPG in experimental group in alveolar bone increased significantly, RANKL in experimental group in alveolar bone decreased significantly, RANKL/OPG ratio in experimental group decreased significantly, MGF in experimental group in alveolar bone increased significantly, bone volume to total volume fraction increased significantly in experimental group, trabecular thickness increased significantly in experimental group, and trabecular separation decreased significantly in experimental group. Conclusion: Enhanced masticatory force affected the expression of OPG, RANKL, and MGF in alveolar bone of ovariectomized rats, improved the quality of jaw bone of ovariectomized rats, and delayed oral bone loss by ovariectomy.


Subject(s)
Animals , Female , Bite Force , Insulin-Like Growth Factor I/analysis , Ovariectomy , RANK Ligand/analysis , Osteoprotegerin/analysis , Alveolar Process/physiopathology , Osteocalcin/blood , Blotting, Western , Polymerase Chain Reaction , Rats, Sprague-Dawley , Alkaline Phosphatase/blood , Estradiol/blood , X-Ray Microtomography , Enzyme-Linked Immunospot Assay
2.
RFO UPF ; 24(2): 309-315, maio/ago. 2 2019. ilus
Article in Portuguese | LILACS, BBO | ID: biblio-1049684

ABSTRACT

Objetivo: demonstrar, por meio de uma revisão de literatura, a utilização do hormônio do crescimento (GH) e concentrados plaquetários e sugerir técnica de associação de uso para odontologia em processos de preservação de osso alveolar. Revisão de literatura: enxertos ósseos são uma necessidade na área da saúde, por diversas razões. A utilização de osso autógeno apresenta grande desvantagem em ter um segundo sítio cirúrgico, entretanto, os substitutos ósseos não possuem as características ideais. Assim, existe a busca por alternativas que otimizem a cicatrização e a incorporação dos substitutos ósseos, dentre elas os concentrados sanguíneos, ricos em fatores de crescimento derivados das plaquetas e o hormônio do crescimento. É possível encontrar uma vasta literatura utilizando os concentrados sanguíneos, inclusive utilizando esses como veículos para outras substâncias. Os concentrados sanguíneos são ricos em fatores de crescimento derivados das plaquetas, como fator de crescimento semelhante à insulina (IGF), Fator de crescimento derivado de plaquetas (PDGF) e outros. Além disso, também é possível encontrar, na literatura, o uso tópico de hormônio do crescimento em enxertos ósseos, fraturas e implantes dentários. Entretanto, o GH possui uma meia-vida de 20 minutos, assim, quando utilizado em conjunto com a I-PRF, espera-se um aumento no tempo de ação local. Considerações finais: é possível otimizar os enxertos ósseos utilizando-se L-PRF/I-PRF e hormônio do crescimento. Porém, são necessárias mais pesquisas.(AU)


Objective: this study aims to show through a literature review the use of the growth hormone and platelet concentrates and to suggest an association technique for dentistry use in alveolar bone preservation processes. Literature review: bone grafts are a health requirement for a number of reasons. The use of autogenous bone has the main disadvantage of a second surgical site, while bone substitutes do not present optimal characteristics. Thus, there is a search for alternatives that optimize the healing and incorporation of bone substitutes, which include blood concentrates that are rich in platelet-derived growth factors and the growth hormone. A vast literature can be found on blood concentrates, including their use as vehicles to other substances. Blood concentrates are rich in platelet-derived growth factors such as IGF, PDGF, and others. Moreover, the literature also shows the topical use of the growth hormone in bone grafts, fractures, and dental implants. However, the growth hormone presents a half-life of 20 minutes; therefore, when combined with I-PRF, an increased time in local action is expected. Final considerations: it is possible to optimize bone grafts by using L-PRF/I-PRF and the growth hormone. However, further research is required.(AU)


Subject(s)
Humans , Growth Hormone/therapeutic use , Alveolar Process/physiopathology , Alveolar Ridge Augmentation/methods , Platelet-Rich Fibrin , Combined Modality Therapy
3.
J. appl. oral sci ; 27: e20180574, 2019. graf
Article in English | LILACS, BBO | ID: biblio-1040233

ABSTRACT

Abstract Hypertension is one of the main causes of premature death in the world; also, it is associated with several bone alterations. Preclinical studies have demonstrated delayed alveolar bone healing in hypertensive rats. However, losartan has been favorable for consolidation of bone grafts and reduction in active periodontitis. Therefore, losartan is suggested to be effective in bone formation stages, as well as in the synthesis of matrix proteins and mineralization. Objectives: To evaluate the alveolar bone dynamics in hypertensive rats treated with losartan by laser confocal microscopy and histological analysis. Methodology: Thirty-two rats, 16 spontaneously hypertensive rats (SHR) and 16 Wistar albinus rats, treated or not with losartan (30 mg/kg/day) were used. Calcein fluorochrome at 21 days and alizarin red fluorochrome at 49 days were injected in rats (both 20 mg/kg). The animals were submitted to euthanasia 67 days after treatment, and then the right maxilla was removed for laser confocal microscopy analysis and the left maxilla for histological analysis. Results: This study showed a greater calcium marking in normotensive animals treated with losartan in relation to the other groups. Laser confocal microscopy parameters showed higher values of bone volume formed, mineralized surface, active surface of mineralization and bone formation rate in normotensive animals treated with losartan. However, a smaller mineralized surface was observed in all hypertensive animals. Conclusion: Losartan can improve bone mineralization parameters under normal physiological conditions, but the same anabolic effect does not occur under hypertension.


Subject(s)
Animals , Male , Losartan/pharmacology , Alveolar Process/drug effects , Alveolar Process/physiopathology , Hypertension/physiopathology , Antihypertensive Agents/pharmacology , Osteogenesis/drug effects , Rats, Inbred SHR , Time Factors , Blood Pressure/drug effects , Bone Regeneration/drug effects , Calcification, Physiologic/drug effects , Reproducibility of Results , Rats, Wistar , Microscopy, Confocal , Alveolar Process/pathology , Fluoresceins/analysis
4.
Medisan ; 22(4)abr. 2018. ilus
Article in Spanish | LILACS | ID: biblio-987226

ABSTRACT

A pesar de los avances en la tecnología para preservar la dentición, aún se requiere la rehabilitación del sistema masticatorio en pacientes desdentados parcial o totalmente, lo que resulta difícil y frustrante -- tanto para los afectados como para los protesistas -- si existe atrofia grave del hueso alveolar. Este problema se puede solucionar mediante una intervención quirúrgica denominada profundización del vestíbulo, dirigida a lograr el aumento de la cresta alveolar y, con ello, el soporte de las prótesis dentales. A tal efecto, en el presente trabajo se propone y describe una nueva opción terapéutica: la técnica de Alemán y Pico, para la profundización del surco vestibular inferior, la cual no es tan invasiva y resulta factible cuando no se cuenta con las condiciones necesarias para colocar implantes, ya sea por escasez de recursos materiales o por situaciones propias del paciente


In spite of the advances in technology to preserve the eruption of teeth, the rehabilitation of the masticatory system is still required in partial or totally toothless patients, what is difficult and frustrating -- either for those affected patients or for the prosthesists -- if serious atrophy of the alveolar bone exists. This problem can be solved by means of a surgical procedure denominated deepening of the vestibule directed to achieve the increase of the alveolar crest and, with it, the support of the dental prosthesis. To such an effect, this work intends and describes a new therapeutic option: the Alemán and Pico technique, for deepening of the inferior vestibular edge, which is not so invasive and it is feasible when the necessary conditions to place an implant are not available, either due to shortage of material resources or due to situations of the patients themselves


Subject(s)
Humans , Male , Female , Vestibular Function Tests/methods , Vestibuloplasty , Dental Prosthesis, Implant-Supported/methods , Alveolar Process/physiopathology , Therapeutics , Alveolar Ridge Augmentation
6.
Bauru; s.n; 2015. 116 p. ilus, tab, graf.
Thesis in Portuguese | LILACS | ID: lil-773789

ABSTRACT

Objetivos: O objetivo deste estudo foi avaliar em adultos com perdas dos primeirosmolares inferiores permanentes, as inclinações e angulações dentárias dos dentesadjacentes, bem como a espessura do rebordo após movimentação mesial desegundos molares para suprir a perda e verticalização dos segundos molares parareabilitação protética. Métodos: Foram selecionados 2 grupos de estudo. O GrupoFechamento (GF) foi composto por 12 hemiarcos com ausência de primeirosmolares permanentes e espaços variando entre 2 a 7mm, que foram tratadasortodonticamente com fechamento do espaço. O Grupo Abertura (GA) foi compostopor 14 hemiarcos com ausência de primeiros molares permanentes e espaçosvariando entre 7,1 a 12mm, que foram tratadas ortodonticamente com verticalizaçãodo segundo e terceiro molar e reabertura de espaço para reabilitação protética.Avaliou-se em modelos dentários digitais a angulação, a inclinação, a dimensãocérvico-oclusal e a espessura do rebordo. As comparações interfases e intergruposforam realizadas com os testes t-pareado e t-independente respectivamente(p<0,05). Resultados: Houve melhora na angulação dos segundos molaresinferiores tanto no GF quanto no GA, mostrando eficácia da mecânica em ambas asterapias; não houve alterações significantes nas inclinações vestibulolinguais dosdentes posteriores em ambos os grupos; a espessura do rebordo aumentou no GF emanteve-se constante no GA. Conclusões: As duas modalidades de tratamentodemonstraram resultados adequados. A escolha do plano de tratamento deveponderar a relação custo-benefício de cada caso, considerando-se a dimensãoinicial do espaço, a presença dos terceiros molares, as condições periodontaisiniciais, o tempo de tratamento e o custo financeiro...


Objectives: The aim of this study was to evaluate, in adults with loss of the firstpermanent molars, the inclinations and angles of adjacent teeth as well as thealveolar ridge thickness after mesial movement of second molars to close the spaceof the tooth loss and second molar uprighting to rehabilitation prosthetic. Methods:Two study groups were selected. The Group Closure (GC) was composed of 12quadrants with no permanent first molars and edentulous spaces varying from 2 to7mm, which were treated with orthodontic space closure. The Group Opening (GO)was composed of 14 quadrants with no permanent first molars and edentulousspaces varying from 7.1 to 12mm, which were treated with orthodontic uprighting ofthe second and third molars and reopening space for prosthetic rehabilitation. Indigital dental models were evaluated the angulation, inclination, the cervical-occlusaldimension and alveolar ridge thickness. Interphase and intergroup comparisons wereperformed with with paired t-test and independent t-test, respectively (p <0.05).Results: There was improvement in the angulation of the mandibular second molarsboth in GC and GO, showing the mechanical efficiency in both therapies; there wereno significant changes in buccolingual inclinations of the posterior teeth in bothgroups; the alveolar ridge thickness increased in GC and remained constant in GO.Conclusions: Both treatment modalities have demonstrated appropriate results. Thechoice of treatment plan should consider the cost-benefit of each case, taking intoaccount the initial dimension of the space, the presence of third molars, initialperiodontal conditions, treatment time and the financial cost...


Subject(s)
Humans , Male , Female , Adult , Models, Dental , Tooth Movement Techniques/methods , Alveolar Process/physiopathology , Molar/physiopathology , Odontometry/methods , Reference Values , Reproducibility of Results , Time Factors , Treatment Outcome
7.
Bauru; s.n; 2015. 116 p. ilus, tab, graf.
Thesis in Portuguese | LILACS, BBO | ID: biblio-867337

ABSTRACT

Objetivos: O objetivo deste estudo foi avaliar em adultos com perdas dos primeirosmolares inferiores permanentes, as inclinações e angulações dentárias dos dentesadjacentes, bem como a espessura do rebordo após movimentação mesial desegundos molares para suprir a perda e verticalização dos segundos molares parareabilitação protética. Métodos: Foram selecionados 2 grupos de estudo. O GrupoFechamento (GF) foi composto por 12 hemiarcos com ausência de primeirosmolares permanentes e espaços variando entre 2 a 7mm, que foram tratadasortodonticamente com fechamento do espaço. O Grupo Abertura (GA) foi compostopor 14 hemiarcos com ausência de primeiros molares permanentes e espaçosvariando entre 7,1 a 12mm, que foram tratadas ortodonticamente com verticalizaçãodo segundo e terceiro molar e reabertura de espaço para reabilitação protética.Avaliou-se em modelos dentários digitais a angulação, a inclinação, a dimensãocérvico-oclusal e a espessura do rebordo. As comparações interfases e intergruposforam realizadas com os testes t-pareado e t-independente respectivamente(p<0,05). Resultados: Houve melhora na angulação dos segundos molaresinferiores tanto no GF quanto no GA, mostrando eficácia da mecânica em ambas asterapias; não houve alterações significantes nas inclinações vestibulolinguais dosdentes posteriores em ambos os grupos; a espessura do rebordo aumentou no GF emanteve-se constante no GA. Conclusões: As duas modalidades de tratamentodemonstraram resultados adequados. A escolha do plano de tratamento deveponderar a relação custo-benefício de cada caso, considerando-se a dimensãoinicial do espaço, a presença dos terceiros molares, as condições periodontaisiniciais, o tempo de tratamento e o custo financeiro.


Objectives: The aim of this study was to evaluate, in adults with loss of the firstpermanent molars, the inclinations and angles of adjacent teeth as well as thealveolar ridge thickness after mesial movement of second molars to close the spaceof the tooth loss and second molar uprighting to rehabilitation prosthetic. Methods:Two study groups were selected. The Group Closure (GC) was composed of 12quadrants with no permanent first molars and edentulous spaces varying from 2 to7mm, which were treated with orthodontic space closure. The Group Opening (GO)was composed of 14 quadrants with no permanent first molars and edentulousspaces varying from 7.1 to 12mm, which were treated with orthodontic uprighting ofthe second and third molars and reopening space for prosthetic rehabilitation. Indigital dental models were evaluated the angulation, inclination, the cervical-occlusaldimension and alveolar ridge thickness. Interphase and intergroup comparisons wereperformed with with paired t-test and independent t-test, respectively (p <0.05).Results: There was improvement in the angulation of the mandibular second molarsboth in GC and GO, showing the mechanical efficiency in both therapies; there wereno significant changes in buccolingual inclinations of the posterior teeth in bothgroups; the alveolar ridge thickness increased in GC and remained constant in GO.Conclusions: Both treatment modalities have demonstrated appropriate results. Thechoice of treatment plan should consider the cost-benefit of each case, taking intoaccount the initial dimension of the space, the presence of third molars, initialperiodontal conditions, treatment time and the financial cost.


Subject(s)
Humans , Male , Female , Adult , Models, Dental , Tooth Movement Techniques/methods , Alveolar Process/physiopathology , Molar/physiopathology , Odontometry/methods , Reference Values , Reproducibility of Results , Time Factors , Treatment Outcome
8.
Dental press j. orthod. (Impr.) ; 18(5): 91-98, Sept.-Oct. 2013. ilus, tab
Article in English | LILACS | ID: lil-697051

ABSTRACT

OBJECTIVE: To compare, through computed tomography, alveolar bone thickness changes at the maxillary incisors area during orthodontic treatment with and without tooth extraction. METHODS: Twelve patients were evaluated. They were divided into 2 groups: G1 - 6 patients treated with extraction of right and left maxillary first premolars, with mean initial age of 15.83 years and mean treatment length of 2.53 years; G2 - 6 patients treated without extraction, with mean initial age of 18.26 years and mean treatment length of 2.39 years. Computed tomographies, lateral cephalograms and periapical radiographs were used at the beginning of the treatment (T1) and 18 months after the treatment had started (T2). Extraction space closure occurred in the extraction cases. Intragroup and intergroup comparisons were performed by dependent and independent t test, respectively. RESULTS: In G1, the central incisor was retracted and uprighted, while in G2 this tooth showed vestibularization. Additionally, G1 presented a higher increase of labial alveolar bone thickness at the cervical third in comparison with G2. The incidence of root resorption did not present significant differences between groups. CONCLUSION: There were no changes in alveolar bone thickness when extraction and nonextraction cases were compared, except for the labial alveolar bone thickness at the cervical third of maxillary incisors.


OBJETIVO: comparar, por meio de tomografia computadorizada, a alteração da espessura óssea alveolar na região de incisivos superiores durante o tratamento ortodôntico, com e sem extração dentária. MÉTODOS: foram avaliados 12 pacientes, divididos em dois grupos: G1, seis pacientes tratados com extrações de dois primeiros pré-molares superiores, com idade média inicial de 15,83 anos, e tratados por um tempo médio de 2,53 anos; G2, seis pacientes tratados sem extrações, com idade média inicial de 18,26 anos e tratados por um período de 2,39 anos. Foram utilizadas tomografias computadorizadas, telerradiografias em norma lateral e radiografias periapicais ao início (T1) e após 18 meses de tratamento (T2), desde que o espaço da extração já estivesse fechado nos casos tratados com extrações. A comparação intragrupo foi realizada por meio do teste t dependente, e a comparação intergrupos por meio do com o teste t independente. RESULTADOS: o grupo 1 apresentou uma retração e verticalização do incisivo central, enquanto o grupo 2 apresentou uma vestibularização desse dente. Além disso, o grupo 1 apresentou maior aumento da espessura óssea cervical vestibular durante o tratamento, quando comparado ao grupo 2. A incidência de reabsorção radicular não apresentou diferenças significativas entre os grupos. CONCLUSÕES: não houve alteração nas espessuras ósseas alveolares quando comparados casos tratados com e sem extrações, com exceção da espessura óssea vestibular na região cervical dos incisivos superiores.


Subject(s)
Adolescent , Child , Female , Humans , Male , Young Adult , Alveolar Bone Loss/etiology , Alveolar Process/physiopathology , Malocclusion, Angle Class I/therapy , Malocclusion, Angle Class II/therapy , Maxilla/physiopathology , Orthodontics, Corrective/methods , Tooth Extraction , Alveolar Process , Bone Density , Bicuspid/surgery , Chi-Square Distribution , Incisor , Maxilla , Orthodontics, Corrective/adverse effects , Root Resorption/etiology , Tomography, X-Ray Computed , Tooth Extraction/adverse effects
9.
Article in English | IMSEAR | ID: sea-139771

ABSTRACT

Context: The prediction of implant treatment is directly influenced by the quality of the remaining bone after tooth extraction. Aims : The purpose of this experimental study was to, histologically and histometrically, evaluate the bone repair process in the central areas of extraction sockets filled with platelet-rich plasma. Materials and Methods: Four young adult male Cebus apella monkeys were used. The extraction of both right and left inferior second premolars was accomplished. After extraction, in one of the extraction sockets, coagulum was maintained while in the other it was removed; the alveolus was dried with gauze compress and filled up with platelet concentrate. For PRP production, Sonnleitner's protocol was followed. The specimens for histological and histometric assessment were obtained in 30, 90, 120 and 180 days intervals. Results: In 30 days new bone formation was intense in both experimental and control sockets and no significant differences were observed between the two groups. After 90 days of the extraction, while the control group showed signs of decrease in osteogenesis, in the experimental unit, the process of bone formation and fibroblast-like cell proliferation remained intense. After 120 days, the PRP treated socket was occupied by large trabeculae of bone. After 180 days, the control unit was occupied mostly with bone marrow. The experimental unit remained occupied with large amounts of bone tissue. Conclusions: It was possible to conclude that bone repair was enhanced by the use of platelet- rich plasma in alveolar sockets.


Subject(s)
Adipocytes/pathology , Alveolar Process/pathology , Alveolar Process/physiopathology , Animals , Bicuspid/surgery , Biopsy , Bone Density/physiology , Bone Marrow/pathology , Cebus , Cell Proliferation , Collagen , Fibroblasts/pathology , Fibroblasts/physiology , Male , Osteoblasts/pathology , Osteoblasts/physiology , Osteogenesis/physiology , Platelet-Rich Plasma/physiology , Random Allocation , Time Factors , Tooth Extraction , Tooth Socket/pathology , Tooth Socket/physiopathology , Wound Healing/physiology
10.
Rev. Asoc. Odontol. Argent ; 95(2): 157-171, abr.-mayo 2007. ilus
Article in Spanish | LILACS | ID: lil-467759

ABSTRACT

En el presente artículo se reveen los conceptos que tratan la problemática del trauma periodontal por oclusión (TPO) desde su comienzo hasta la actualidad. Se describen las consecuencias de las fuerzas oclusales en el periodonto cuanto éste pierde la capacidad de adaptación ante las mismas o cuando éstas exceden la capacidad de adaptación del periodonto. Luego, los factores que puedenproducir un desequilibrio biomecánico en el sistema gnático necesarios para generar TPO. Por último, se propone un enfoque de tratamiento multidisciplinario para cada uno de los tipos de TPO, ilustrando cada uno de ellos con casos clínicos


Subject(s)
Periodontal Diseases/etiology , Periodontal Diseases/therapy , Dental Occlusion, Traumatic/pathology , Patient Care Team , Biomechanical Phenomena , Bruxism/physiopathology , Periodontium/physiopathology , Alveolar Process/physiopathology , Stomatognathic System/physiopathology
11.
Rev. ADM ; 63(5): 176-180, sept.-oct. 2006. ilus, tab
Article in Spanish | LILACS | ID: lil-481244

ABSTRACT

El papel fisiológico de las hormonas sexuales en el hueso alveolar ha tomado gran importancia en el movimiento ortodóncico. El objetivo de este estudio es determinar el efecto de un anticonceptivo a base de una combinación de estrógeno y progestina en la formación inicial de osteoclastos inducida por estrés mecánico. Material y métodos: Se utilizaron treinta ratas Wistar hembras. Al grupo A, considerado grupo experimental, se le aplicó una dosis de cipionato de estradiol y medroxiprogesterona así como la fuerza de un resorte colocado entre el primero y segundo molar superior. El grupo B, fue el grupo al que se le aplicó el mismo preparado hormonal, pero sin resorte. Y al grupo C se le colocó el resorte, sin aplicación hormonal. Resultados: El grupo A presentó un decremento significativo en el número de osteoclastos (16.60 ± 3.9 p < 0.005) comparado con el grupo C (21.30 ± 1.94 p < 0.005). El grupo B que sólo recibió terapia hormonal se comportó significativamente menor a los dos grupos anteriores mostrando un decremento en el número de osteoclastos (0.8380 ± .4824 p < 0.005). Conclusiones: Los resultados sugieren que la combinación de estrógeno y progestina utilizada en este estudio generó disminución en la formación inicial de osteoclastos, decreciendo los efectos de la resorción en el hueso alveolar.


Subject(s)
Rats , Animals , Estrogens/physiology , Tooth Movement Techniques/adverse effects , Osteoclasts/physiology , Progestins/physiology , Stress, Mechanical , Orthodontic Appliances , Alveolar Process/physiopathology , Data Interpretation, Statistical
12.
Rev. Fundac. Juan Jose Carraro ; 3(7): 10-4, nov. 1998.
Article in Spanish | LILACS | ID: lil-253725

ABSTRACT

Una situación por demás desagradable en las consultas de mantenimiento o de control es cuando se observa la visibilidad del margen de las coronas provocadas por la retracción de la encía. No cabe duda que el mayor empeño fue empleado para ocultar dicha terminación, ubicando adecuadamente el margen de la preparación, sin embargo, el defecto por demás frecuente se produce. Veamos qué maniobras, qué situaciones se deben evitar o qué acciones se deben realizar para que a largo plazo no se produzca la tan temida retracción. Podemos enumerar las posibles causas: 1- Comenzar la toma de impresión con la encía inflamada. 2- Lesión periodontal a causa de la placa bacteriana. 3- Maniobras operatorias incorrectas. a) Ubicación inadecuada del margen gingival. b) Invasión del espacio biológico. c) Incorrecta toma de impresión. 4- Apresuramiento en la toma de las impresiones. 5- Uso incorrecto de los elementos de higiene. 6- Anatomía ósea subyacente que predispone a los cambios de posición del margen gingival


Subject(s)
Gingival Recession/etiology , Gingival Recession/prevention & control , Alveolar Process/physiopathology , Dental Marginal Adaptation/standards , Dental Plaque/physiopathology , Gingiva/pathology , Gingival Diseases/physiopathology , Periodontal Diseases/physiopathology , Dental Cavity Preparation/adverse effects , Dental Restoration, Permanent/adverse effects , Dental Impression Technique/adverse effects
13.
Rev. dent. Chile ; 88(1): 4-7, abr. 1997. ilus
Article in Spanish | LILACS | ID: lil-200173

ABSTRACT

Se realizó un trabajo clínico sobre un paciente desdentado parcial superior clase II de Kennedy (desdentado de extensión distal unilateral), con extrema reabsorción alveolar y neumatización amplia del seno maxilar. La rehabilitación consistió en una prótesis fija empleando como pilares los dos dientes naturales próximos a la zona desdentada y un muñón distal emergente de un implante subperióstico parcial. Los controles a los 3, 6, 9 y 12 meses demostraron morfofuncionalidad de dientes e implante subperióstico, cuando éstos se conectan a través de una prótesis fija convencional


Subject(s)
Humans , Female , Adult , Dental Implantation, Subperiosteal , Denture, Partial, Fixed , Jaw, Edentulous, Partially/rehabilitation , Alveolar Process/physiopathology , Maxillary Sinus/pathology , Bone Resorption/physiopathology , Root Planing , Subgingival Curettage
14.
Odontol. chil ; 44(1): 5-9, jun. 1996. ilus
Article in Spanish | LILACS | ID: lil-200112

ABSTRACT

Para determinar los cambios tisulares que provocan las fuerzas ortodóncicas de alta magnitud se utilizaron 25 ratas Sprague Dowley, a las cuales se les instaló durante 10 días un resorte comprimido que ejercía 150 grs/pond sobre el primer molar superior, de componente mesial y extrusivo. El molar contralateral fue utilizado como control. Obtenidas las muestras fueron procesadas y sometidas a 3 tinciones: hematoxilina-eosina, tricrómico de Masson y picrosirius. Los resultados observados muestran una respuesta de tipo patológico en los tejidos del periodonto de inserción del molar experimental, en los cuales se apreció una gran reabsorción del hueso alveolar, presencia de osteoclastos, células gigantes multinucleadas y reabsorción radicular, sin distinguirse aposición ósea en las áreas de tensión. La respuesta a la fuerza aplicada se extendió a los tejidos de inserción de la pieza vecina, observándose la presencia de reabsorción ósea endóstica y parietal y vasodilatación en la zona cercana al molar experimental


Subject(s)
Animals , Rats , Orthodontic Appliances/adverse effects , Periodontal Ligament/injuries , Bone Resorption/physiopathology , Tooth Movement Techniques/adverse effects , Alveolar Process/physiopathology , Histological Techniques , Microscopy, Polarization/methods , Molar/ultrastructure , Rats, Sprague-Dawley
15.
Rev. ADM ; 52(5): 255-8, sept.-oct. 1995.
Article in Spanish | LILACS | ID: lil-166222

ABSTRACT

La enfermedad dental puede dividirse dentro de dos categorías: caries dental y enfermedad periodontal. Ambas enfermedades deberán ser tratadas antes de iniciar un tratamiento ortodóntico. El tratamiento de la caries es regularmente hecho dentro de la rutina dental, al contrario de la enfermedad periodontal que no es diagnosticada ni tratada en sus inicios tempranos. En este artículo se propone discutir o mencionar algunas formas de la enfermedad periodontal y la existencia de ésta así como su tratamiento y su influencia sobre el tratamiento ortodóntico


Subject(s)
Humans , Adult , Orthodontic Appliances , Periodontal Diseases/therapy , Tooth Movement Techniques , Alveolar Process/physiopathology , Dental Caries/therapy , Dental Plaque/prevention & control , Periodontal Ligament/physiopathology , Tooth Mobility/therapy
16.
Rev. Fac. Odontol. (Córdoba) ; 21/22(1/2): 69-86, ene. 1993-dic. 1994. ilus
Article in Spanish | LILACS | ID: lil-197189

ABSTRACT

Se analizan las circunstancias y características del terreno óseo en implantología, para llegar a una diagnóstico del momento en que se aplicarán los implantes. Según este análisis se los clasifica en inmediatos y diferidos. Los inmediatos tienen ventajas al reducir el tiempo operatorio y en la conservación del proceso alveolar. En esta forma de implantar se pueden emplear recursos complementarios: dilatación alveolar, injertos óseos autólogos recubiertos con periostio, materiales osteotróficos y oseínico mineral, que evita la lisis del coágulo y favorece la coagulación sanguínea y materiales para reforzar o de refuerzo como es la esponja de titanio. Los diferidos, respecto a su instalación, pueden tener interrogantes en su pronóstico por la existencia de áreas osteolíticas que comprometen la instalación de los implantes. La biopsia del terreno y el efecto estimulante de la cicatrización del alveolo quirúrgico, son criterios aplicables a este tiempo para la inserción de los implantes


Subject(s)
Humans , Male , Female , Alveolar Process/physiopathology , Dental Implantation, Endosseous , Dental Implantation, Endosseous/classification , Oral Surgical Procedures, Preprosthetic , Biocompatible Materials , Bone Transplantation , Collagen/therapeutic use , Surgical Flaps/methods , Bone Density/physiology , Durapatite/therapeutic use , Tooth Extraction , Freeze Drying/methods , Membranes, Artificial , Osseointegration/physiology , Bone Regeneration/physiology , Titanium/therapeutic use , Transplantation, Autologous/instrumentation , Transplantation, Homologous/instrumentation , Treatment Outcome
17.
PJS-Pakistan Journal of Surgery. 1994; 8-9 (3): 13-15
in English | IMEMR | ID: emr-35232
18.
Pract. odontol ; 12(4): 13-5, abr. 1991. ilus
Article in Spanish | LILACS | ID: lil-102395

ABSTRACT

La atrofia del proceso alveolar se evita con la conservación intencional de raíces dentarias sanas en pacientes con estados ideales de salud parodontal y pulpar. En el presente artículo, los resultados se ilustran con un caso representativo


Subject(s)
Humans , Adult , Middle Aged , Male , Female , Alveolar Process/physiopathology , Oral Surgical Procedures, Preprosthetic , Tooth Root , Denture, Complete , Denture, Partial
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