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1.
ImplantNewsPerio ; 3(3): 506-516, mai.-jun. 2018. ilus, tab
Article in Portuguese | LILACS, BBO | ID: biblio-905516

ABSTRACT

Objetivos: melhorar a percepção do dentista sobre a atratividade do sorriso através de avaliações objetivas. Material e métodos: fotografias frontais de sorrisos (envolvendo a área dos caninos) foram aleatoriamente escolhidas e dispostas em dois sentidos verticais variados (nivelado, abaixo) numa guia personalizada contendo quatro molduras labiais do sorriso (fino, médio, grosso, invertido). Os aspectos que influenciam a atratividade do sorriso (PD = proporção dentária, PV = posicionamento vertical dentário, EL = espessura labial, FG = festonamento gengival) também foram incluídos e uma nota final geral atribuída ao sorriso geral (SG). Adicionalmente, o formulário do exercício continha a opção "existe um implante?" e "qual sua localização?". Todos os itens foram avaliados através de escalas de Likert. A prevalência de respostas foi calculada para cada item. O teste de Wilcoxon (alfa = 5%) foi usado para verificar a possibilidade de diferença de opinião entre os nivelamentos horizontais e para uma mesma moldura de sorriso. Os níveis de confiabilidade (concordância absoluta = ICC e responsividade = Cronbach alfa) também foram avaliados. Resultados: um teste-piloto foi conduzido com 16 estudantes. Trinta e duas combinações foto/moldura labial foram geradas e apresentadas de forma randomizada. A avaliação geral do sorriso ficou em: pobre (11/32), mediano (6/32), bom (15/32) e muito bom (1/32). O número de acertos da possível posição do implante foi 13 em 32 tentativas. Diferenças estatisticamente significativas entre os nivelamentos foram observadas nas situações 1/17 (p=0,0001), 13/29 (p=0,02), 2/18 (p=0,0002), 6/22 (p=0,0001), 14/30 (p=0,0001), 7/23 (p=0,01) e 15/31 (p=0,039). Os maiores coeficientes de ICC e Cronbach alfa foram vistos para o sorriso geral e FG. Conclusão: a percepção visual do dentista pode ser treinada mudando-se a moldura labial e o nivelamento vertical dos dentes e é influenciada pelo festonamento gengival. O teste se mostrou útil na verificação da atratividade do sorriso.


Objectives: to improve the perception of the dentist on the smile attractiveness through objective evaluations. Material and methods: frontal photographs of smiles (involving the canine area) were randomly chosen and arranged in two different vertical directions (leveled, below) in a personalized guide containing four lip architectures (thin, medium, thick, inverted). The aspects that infl uence the smile attractiveness (PD = dental proportion, PV = vertical tooth position, EL = lip thickness, GS = gingival scalloping) were also included and a general final score attributed to the general smile (SA). Additionally, the exercise form contained questions such as "is there an implant?" and "what is your location?". All items were assessed using Likert scales. The prevalence of responses was calculated for each item. The Wilcoxon test was used to verify the possibility of differences between the horizontal leveling for the same smile architecture. The reliability levels (absolute agreement = ICC and responsiveness = Cronbach alpha) were also evaluated. Results: a pilot test was conducted with 16 students. Thirty-two photos/lip architecture combinations were generated and presented at random. The overall smile rating was: poor (11/32), average (6/32), good (15/32), and very good (1/32). The number of positive responses for implant position was 13 in 32 trials. Statistically significant differences were observed in the combinations 1/17 (p=0.0001), 13/29 (p=0.02), 2/18 (p=0.0002), 6/22 (p=0.0001), 14/30 (p=0.0001), 7/23 (p=0.01) and 15/31 (p=0.039). The highest ICC and Cronbach alpha values were seen for the general smile attractiveness (SA) and GS. Conclusion: the visual perception can be trained by changing the lip architecture and vertical leveling of the teeth and is influenced by gingival scalloping. This test proved to be useful in verifying the smile attractiveness.


Subject(s)
Humans , Dental Prosthesis, Implant-Supported , Esthetics, Dental , Photography, Dental , Smiling , Technology, Dental
2.
ImplantNewsPerio ; 1(7): 1322-1326, out.-nov. 2016. ilus
Article in Portuguese | LILACS, BBO | ID: biblio-847945

ABSTRACT

Alterações nos tecidos moles, na zona estética, podem ocorrer por procedimentos restauradores associados ou não à Implantodontia. Os autores propuseram um dispositivo acrílico simples associado a uma sonda periodontal, para verificação destes níveis em todos os momentos do tratamento reabilitador. O dispositivo em questão também pode ser desenhado e confeccionado em qualquer sistema CAD/CAM.


Soft tissue changes in the esthetic zone can occur after restorative procedures associated or not to implant dentistry. The authors describe a simple acrylic device associated to a periodontal probe to verify those levels during all treatment procedure steps. Also, this device can be design and milled at any CAD/CAM system.


Subject(s)
Humans , Acrylic Resins/chemistry , Acrylic Resins/therapeutic use , Computer-Aided Design , Dental Implants , Gingival Recession , Therapy, Soft Tissue
3.
ImplantNewsPerio ; 1(4): 712-721, mai.-jun. 2016. ilus, tab
Article in Portuguese | LILACS, BBO | ID: biblio-847034

ABSTRACT

Objetivo: avaliar as desadaptações em supraestruturas de implantes e a curva de assinatura torque-ângulo dos parafusos protéticos nas condições monobloco e pós-soldagem. Material e métodos: uma base retangular de aço inox recebeu três implantes de hexágono externo (4,1 mm x 10 mm), onde foram parafusados minipilares de zircônia. Após o enceramento e inclusão, as supraestruturas foram fundidas em monobloco com uma liga de cobalto-cromo, e os cilindros foram numerados sequencialmente (1, 2 e 3). A leitura na interface supraestrutura/pilar foi realizada com um microscópio comparador (precisão de 1 µm), três vezes em cada cilindro. A tensão de torque nos parafusos foi medida com um torquímetro eletrônico odontológico (OsseoCare, Nobel Biocare). Depois, as supraestruturas foram seccionadas e soldadas a plasma (pontos de estabilização) e maçarico (preenchimento da área restante). Novamente, as desadaptações e assinaturas dos parafusos foram avaliadas pela mesma metodologia. Resultados: as médias de desadaptações foram maiores nas supraestruturas em monobloco (C1=3,5 µm; C2=0 µm; C3=31,2 µm) do que nas supraestruturas pós-soldagem (C1=3,0 µm; C2=2,9 µm; C3=18,1 µm). Dentro de cada condição, o teste de Kruskal-Wallis mostrou diferença estatisticamente significativa apenas para o cilindro 3 (monobloco: p < 0,00003 / pós-soldagem: p=0,008) em relação aos cilindros 1 e 2. Uma diferença estatisticamente significante foi encontrada apenas no C3, comparando as condições monobloco e pós-soldagem (teste t pareado, p=0,03). A assinatura dos parafusos se mostrou melhor na condição pós-soldagem. Conclusão: a fundição monobloco gera instabilidade na assinatura dos parafusos. A desadaptação nos parafusos protéticos de supraestruturas sobre minipilares de zircônia melhora após secção e soldagem híbrida.


Objective: to evaluate the misfi t at implant frameworks and the torque-angle signature curves at the prosthetic screws at one-piece and after soldering conditions. Material and methods: a stainless steel rectangular base received 3 external hex implants (4.1 x 10 mm) where zirconia mini-abutments were fastened. After wax-up and investing, the frameworks were one-piece cast with a Co-Cr alloy, and the prosthetic cylinders sequentially identified (1, 2, and 3). The misfit at the framework/abutment interface was measured with a microscope (reading error 1 µm) 3 times for each cylinder. The screw tension was investigated with an electronic torqued device (Osseocare, Nobel Biocare). After, the frameworks were sectioned and soldered with plasma (stabilization points) and gas torch (filling of the remaining areas). Again, the misfit and torque-angle signatures were measured as described. Results: mean misfit values were greater for one-piece castings (C1=3.5 µm; C2=0 µm; C3=31.2 µm) than after soldering (C1=3.0 µm; C2=2.9 µm; C3=18.1 µm). Within each condition, the Kruskal-Wallis test demonstrated a statistically significant difference only for C3 (one-piece casting: p < 0.00003 / after soldering: p=0.008) compared to C1 and C2. Between each condition, a significant difference was seen only for C3 in the one-piece and after soldering conditions (paired t test, p=0.03). The torque-angle signatures demonstrated a better behavior after soldering. Conclusion: one-piece castings provide instability at torque-angle signatures. Thus, the seating of the prosthetic abutments over the zirconia mini-abutments improves after sectioning and hybrid soldering.


Subject(s)
Dental Implants , Dental Soldering/adverse effects , Metal Ceramic Alloys/adverse effects , Torque , Zirconium
4.
J. appl. oral sci ; 23(4): 376-382, July-Aug. 2015. tab
Article in English | LILACS, BBO | ID: lil-759363

ABSTRACT

AbstractObjective To evaluate the effect of staining beverages (coffee, orange juice, and red wine) on the Vickers hardness and surface roughness of the base (BL) and enamel (EL) layers of improved artificial teeth (Vivodent and Trilux).Material and Methods Specimens (n=8) were stored in distilled water at 37°C for 24 h and then submitted to the tests. Afterwards, specimens were immersed in one of the staining solutions or distilled water (control) at 37°C, and the tests were also performed after 15 and 30 days of immersion. Data were analyzed using 3-way ANOVA and Tukey’s test (α=0.05).Results Vivodent teeth exhibited a continuous decrease (p<0.0005) in hardness of both layers for up to 30 days of immersion in all solutions. For Trilux teeth, similar results were found for the EL (p<0.004), and the BL showed a decrease in hardness after 15 days of immersion (p<0.01). At the end of 30 days, this reduction was not observed for coffee and water (p>0.15), but red wine and orange juice continuously reduced hardness values (p<0.0004). Red wine caused the most significant hardness changes, followed by orange juice, coffee, and water (p<0.006). No significant differences in roughness were observed for both layers of the teeth during the immersion period, despite the beverage (p>0.06).Conclusions Hardness of the two brands of acrylic teeth was reduced by all staining beverages, mainly for red wine. Roughness of both layers of the teeth was not affected by long-term immersion in the beverages.


Subject(s)
Acrylic Resins/chemistry , Beverages , Coloring Agents/chemistry , Tooth, Artificial , Analysis of Variance , Hardness Tests , Immersion , Materials Testing , Surface Properties/drug effects , Time Factors , Water/chemistry
5.
Odontol. clín.-cient ; 10(1): 95-98, jan.-mar. 2011. ilus
Article in Portuguese | LILACS, BBO | ID: lil-577686

ABSTRACT

Lesão periférica de células gigantes é um processo proliferativo não neoplásico reativo à irritaçãolocal ou trauma. Apresenta-se como uma lesão bem circunscrita, que acomete a mucosa alveolar egengiva, podendo comprometer os tecidos ósseos adjacentes, causando mobilidade dentária. O examemicroscópico dessa lesão revela uma massa não encapsulada de tecido, contendo um grande númerode células do tecido conjuntivo e de células gigantes multinucleadas em um padrão estrutural,constituído de nódulos focais de células gigantes, separados por septos fibrosos. Tecido hemorrágico,hemossiderina, células inflamatórias e osso neoformado ou material calcificado também podem serencontrados ao longo do tecido conjuntivo. A associação de extensas lesões periféricas de célulasgigantes a fatores bucais ou sistêmicos ainda não é claramente estabelecida. O objetivo deste trabalhoé o de relatar um caso de lesão periférica de células gigantes recorrente. O correto diagnóstico eo adequado tratamento culminaram em resultados satisfatórios e completa resolução do caso, semindícios de recidivas. Este trabalho apresenta uma revisão atual sobre essa entidade, além de discutir sobre os fatores relacionados à sua etiologia.


Peripheral giant cell lesion is a non-neoplastic proliferative process reactive to the local that has anirritation or a trauma. Presents as well-circumscribed lesion confined to the alveolar and gingivalmucosa, may compromise the bone tissue adjacent causing tooth mobility. On histologic evaluation,the lesion is a noncapsulated mass of tissue containing a large number of young connective tissuecells and multinucleated giant cells in an architectural pattern of giant cells? focal nodules, separatedby fibrous septa. Hemorrhage, hemosiderin, inflammatory cells, and newly formed bone or calcifiedmaterial may also be seen throughout the cellular connective tissue. The association of large peripheralgiant cell?s lesions to oral or systemic factors is also unclear. The purpose of this work is to presenta case of peripheral giant cell?s lesion recurrence. The correct diagnosis and treatment culminatedin a totally satisfactory result and complete resolution of the case, without recurrences. This paperpresents a review on the current entity, and discusses the factors related to its etiology.


Subject(s)
Diagnosis , Granuloma, Giant Cell , Recurrence
6.
J. appl. oral sci ; 17(spe): 1-4, 2009.
Article in English | LILACS | ID: lil-576870

ABSTRACT

The rate of bariatric surgery has significantly risen in the past decade as an increasing prevalence of extreme obesity can be observed. Although bariatric surgery is an effective therapeutic modality for extreme obesity, it is associated with risk factors affecting also oral health. Based on an overview of the current literature, this paper presents a summary of dental manifestations in bariatric patients. Bariatric surgeries are associated with an increased risk for gastro-esophageal reflux which in turn might account for the higher amount of carious and erosive lesions observed in bariatric patients. As a result, also dentin hypersensitivity might be observed more frequently. The current data indicate that recommended postsurgical meal patterns and gastric reflux might increase the risk for dental lesions, particularly in the presence of other risk factors, such as consumption of sweet-tasting foods and acidic beverages. Further research is needed to evaluate the correlation of bariatric surgery and the development of dental diseases.


Subject(s)
Humans , Bariatric Surgery/adverse effects , Dental Caries/etiology , Dentin Sensitivity/etiology , Tooth Erosion/etiology , Gastroesophageal Reflux/complications , Oral Hygiene , Postoperative Period , Risk Factors
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