RESUMO
OBJECTIVE: This retrospective study aimed to compare the dentoskeletal and soft-tissue changes in Class II malocclusion patients treated with Jasper Jumper and Twin Force Bite Corrector associated with fixed orthodontic appliances. MATERIAL AND METHODS: The sample comprised 60 subjects divided into 3 groups. Patients with Class II malocclusion, mandibular retrusion, slight or no crowding and with no previous orthodontic treatment were eligible. Group 1 comprised 20 patients treated with the Jasper Jumper (JJ), with an initial age of 12.39 years. Group 2 comprised 20 patients treated with the Twin Force (TF), with an initial age of 11.83 years. The control group consisted of 20 untreated Class II subjects with an initial age of 12.13 years. Intergroup pretreatment comparisons were performed with One-way analysis of variance and intergroup treatment changes were compared with the Analysis of Covariance, both followed by Tukey test. RESULTS: The TF group showed greater increase in mandibular length (6.23mm±4.64, P=0.004) than the control group (2.94mm±1.75). The mandibular incisors in the experimental groups presented significantly greater labial inclination and protrusion than the control (Md1.NB; JJ: 4.19°±2.09; TF: 4.46°±6.83; control: 1.13°±2.08, P=0.000/Md1-NB; JJ: 1.95mm±1.45; TF: 1.74mm±1.79; control: 0.31mm±0.81, P=0.000). In addition, the treated groups also showed significantly improvement of the dental relationships (Overjet; JJ: -4.05mm±4.64; TF: -3.80mm±2.12; control: 0.05mm±1.12, P=0.000/Overbite; JJ: -2.52mm±1.46; TF: -2.93mm±2.13; control: -0.63mm±1.35, P=0.000). CONCLUSION: The Jasper Jumper and Twin Force associated to fixed appliances were effective in correcting Class II malocclusion with a combination of skeletal and dentoalveolar changes. However, the TF seems to provide more skeletal effects with greater maxillary growth restriction and mandibular length increase when compared to the JJ.
Assuntos
Aparelhos Ativadores , Arcada Osseodentária/fisiologia , Má Oclusão Classe II de Angle/terapia , Avanço Mandibular/instrumentação , Mucosa Bucal/fisiologia , Adolescente , Análise de Variância , Criança , Feminino , Humanos , Arcada Osseodentária/anatomia & histologia , Masculino , Má Oclusão Classe II de Angle/fisiopatologia , Mandíbula/crescimento & desenvolvimento , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos Fixos , Estudos RetrospectivosRESUMO
The micronucleus (MN) test of the human buccal mucosa was developed more than 30 years ago, although this technique has only recently been applied to wild mammals. This paper presents a pioneering study in the genotoxicological evaluation of the exfoliated cells of the buccal mucosa of bats. The assay was applied to two insectivorous bat species (Noctilio albiventris and Pteronotus parnellii) sampled in riparian corridors located in the city of Palmas (capital of the Brazilian state of Tocantins), with the results being compared with those obtained for a third insectivorous species (Nyctinomops laticaudatus), which has established a colony under a road bridge in the same region. This colony represents one of the largest molossidae populations ever recorded in Brazil. A significantly higher frequency of micronuclei was recorded in this colony, as well as a number of other nuclear abnormalities, including binucleated cells, cells with condensed chromatin and karyolysis, in comparison with the bats from the riparian corridors, indicating that the bats from the bridge colony are more susceptible to genotoxic damage. Thus, it is demonstrated the importance of the biomarker (MN) for use in wild animals and allows to conclude that colony bats are more susceptible to genotoxic damages.
Assuntos
Núcleo Celular/patologia , Quirópteros/genética , Dano ao DNA/genética , Poluição Ambiental/efeitos adversos , Micronúcleos com Defeito Cromossômico/veterinária , Mucosa Bucal/citologia , Animais , Biomarcadores/análise , Brasil , Humanos , Micronúcleos com Defeito Cromossômico/induzido quimicamente , Testes para Micronúcleos , Mucosa Bucal/fisiologiaRESUMO
Fibroblast growth factor 2 (FGF-2) is a multifunctional cytokine expressed in several tissues and involved in a wide variety of biologic activities, with one low molecular weight (LMW) protein present in the cytosol, which is secreted, acting via its receptors (FGFRs), and four high molecular weight (HMW) proteins located in the nucleus. Fibroblast growth factor receptor (FGFR) family has four (FGFR1-4) transmembrane tyrosine kinase receptors expressed on several cell types, and FGFR-1 has been indicated as a potential molecular target in several types of cancer, including oral squamous cell carcinoma (OSCC). The FGF-2/FGFR-1 expression has been studied in the oral cavity, and it was associated with the wound repair process, the development of benign and malignant salivary gland tumors, besides being related to oral potentially malignant disorders (OPMDs) and OSCC. Hence, we critically review the currently available data on FGF-2/FGFR-1 expression in the normal mucosa and lesions of the oral cavity.
Assuntos
Carcinoma de Células Escamosas/genética , Carcinoma de Células Escamosas/metabolismo , Fator 2 de Crescimento de Fibroblastos/genética , Fator 2 de Crescimento de Fibroblastos/metabolismo , Expressão Gênica , Mucosa Bucal/metabolismo , Neoplasias Bucais/genética , Neoplasias Bucais/metabolismo , Boca , Lesões Pré-Cancerosas/genética , Lesões Pré-Cancerosas/metabolismo , Receptor Tipo 1 de Fator de Crescimento de Fibroblastos/genética , Receptor Tipo 1 de Fator de Crescimento de Fibroblastos/metabolismo , Glândulas Salivares/metabolismo , Humanos , Mucosa Bucal/fisiologia , Cicatrização/genéticaRESUMO
Wounds in the oral mucosa heal faster and more efficiently than those in the skin, although the mechanisms underlying these differences are not completely clear. In the last 10 years, a group of salivary peptides, the histatins, has gained attention on behalf of their ability to improve several phases of the wound-healing process. In addition to their roles as anti-microbial agents and in enamel maintenance, histatins elicit other biological effects, namely by promoting the migration of different cell types contained in the oral mucosa and in non-oral tissues. Histatins, and specifically histatin-1, promote cell adhesion and migration in oral keratinocytes, gingival and dermal fibroblasts, non-oral epithelial cells, and endothelial cells. This is particularly relevant, as histatin-1 promotes the re-epithelialization phase and the angiogenic responses by increasing epithelial and endothelial cell migration. Although the molecular mechanisms associated with histatin-dependent cell migration remain poorly understood, recent studies have pointed to the control of signaling endosomes and the balance of small GTPases. This review aimed to update the literature on the effects of histatins in cell migration, with a focus on wound healing. We will also discuss the consequences that this increasing field will have in disease and therapy design.
Assuntos
Movimento Celular , Histatinas/fisiologia , Mucosa Bucal/fisiologia , Cicatrização , Animais , Adesão Celular , Células Epiteliais/fisiologia , Histatinas/metabolismo , Humanos , Saliva/metabolismoRESUMO
Chile peppers are one of the most important vegetable and spice crops in the world. They contain capsaicinoids that are responsible for the characteristic burning (pungency) sensation. Currently, there are 22 known naturally occurring capsaicinoids that can cause the heat sensation when consumed. Each produces a different heat sensation effect in the mouth. A need exists for a standard and new terminology to describe the complex heat sensation one feels when eating a chile pepper. A comprehensive set of descriptors to describe the sensory characteristics of chile pepper heat was developed. It was validated with trained panelists tasting samples representing the five domesticated species and 14 pod-types within these species. Five key attributes that define and reference a lexicon for describing the heat sensation of chile peppers were determined to describe the heat sensation in any product, and importantly, can be used in the food industry worldwide.
Assuntos
Capsicum , Preferências Alimentares , Qualidade dos Alimentos , Frutas , Percepção Gustatória , Paladar , Capsicum/química , Capsicum/crescimento & desenvolvimento , Capsicum/normas , Consenso , Produtos Agrícolas/química , Produtos Agrícolas/crescimento & desenvolvimento , Produtos Agrícolas/normas , Rotulagem de Alimentos/normas , Preferências Alimentares/etnologia , Frutas/química , Frutas/crescimento & desenvolvimento , Frutas/normas , Guias como Assunto , Humanos , Mucosa Bucal/fisiologia , New Mexico , Sensação , Especificidade da Espécie , Terminologia como Assunto , Fatores de TempoRESUMO
BACKGROUND AND OBJECTIVES: Increased expression of inflammatory cytokines in the oral cavity has been related to the etiopathogenesis of oral mucositis and to delayed oral mucosal repair. Low-level laser therapy (LLLT) stimulates proliferation and migration of gingival fibroblasts, but the effects of specific inflammatory cytokines on oral mucosal cells and the modulation of these effects by LLLT have not been fully investigated. Therefore, this study investigated the effects of LLLT on oral fibroblasts after being challenged by oral-mucositis-related inflammatory cytokines. METHODS: Human gingival fibroblasts were seeded in plain culture medium (DMEM) containing 10% fetal bovine serum (FBS) for 24 hours. Then, cells were kept in contact with inflammatory cytokines (TNF-α, IL-1ß, IL-6, and IL-8) in serum-free DMEM for 24 hours. After this period, cells were subjected to LLLT with a diode laser device (LaserTABLE, InGaAsP, 780 nm, 25 mW) delivering energy doses from 0.5 to 3 J/cm2 . Irradiation was repeated for 3 consecutive days. Twenty-four hours after the last irradiation, cell migration (wound-healing and transwell migration assays), cell proliferation (BrdU), gene expression of COL-I and growth factors (real-time PCR), and synthesis of COL-I (Sirius Red assay) and VEGF (ELISA) were assessed. Data were subjected to two-way ANOVA and Tukey's tests or Kruskall-Walis and Mann-Whitney tests (P < 0.05). RESULTS: The inflammatory cytokines decreased the migration capacity of gingival fibroblasts. However, a statistically significant difference was observed only for IL-6, detected by transwell assay, where 30% less cells migrated through the pores (P < 0.05) and IL-8, with an increased wound area (116%; P < 0.05), detected by the wound healing method. Cell proliferation was not affected by contact with cytokines, while growth factors and COL-I expression (approximately 80%; P < 0.05), as well as VEGF synthesis (approximately 20%; P < 0.05), were decreased after contact to all tested cytokines. The opposite was seen for total collagen synthesis. LLLT promoted an acceleration of fibroblast migration (30%; P < 0.05) and proliferation (112%; P < 0.05) when delivering 0.5 J/cm2 to the cells previously in contact with the inflammatory cytokines. Gene expression of VEGF (approximately 30%; P < 0.05), and EGF (17%; P < 0.05), was stimulated by LLLT after contact with TNF-α and IL-6. CONCLUSION: LLLT can counteract the negative effects of high concentrations of inflammatory cytokines, especially IL-6 and IL-8 on gingival fibroblast functions directly related to the wound-healing process. Lasers Surg. Med. 48:1006-1014, 2016. © 2016 Wiley Periodicals, Inc.
Assuntos
Citocinas/metabolismo , Fibroblastos/efeitos da radiação , Lasers Semicondutores/uso terapêutico , Terapia com Luz de Baixa Intensidade/métodos , Mucosa Bucal/efeitos da radiação , Estomatite/radioterapia , Cicatrização/efeitos da radiação , Adulto , Biomarcadores/metabolismo , Movimento Celular/efeitos da radiação , Proliferação de Células/efeitos da radiação , Fibroblastos/fisiologia , Regulação da Expressão Gênica/efeitos da radiação , Gengiva/fisiologia , Gengiva/efeitos da radiação , Humanos , Mucosa Bucal/fisiologia , Estomatite/genética , Estomatite/metabolismo , Cicatrização/fisiologiaRESUMO
PURPOSE: The aim of this study was to evaluate bone regeneration at surgically created dehiscence buccal defects at implants placed immediately into extraction sockets (IPIES) of small dimensions filled with autogenous bone or deproteinized bovine bone mineral (DBBM) associated with a collagen membrane. MATERIALS AND METHODS: Eight Labrador dogs were used and implants were placed immediately into the extraction sockets of the second premolar. The buccal wall was subsequently removed to create a standardized defect, 4 mm wide coronally, 2 mm wide apically, and 6 mm high. Autogenous bone particles (AB) or DBBM granules were used to fill the defects. All surgical sites were subsequently covered by a resorbable collagen membrane and a non-submerged healing was allowed. After 4 months, the animals were euthanized and bone blocks harvested and processed for histomorphometric analysis. RESULTS: The bony crest at the buccal aspect (C) was located 2.3 ± 0.8 mm and 1.7 ± 0.7 mm apically to the implant shoulder (IS) at the AB and DBBM sites, respectively. The coronal levels of osseointegration at the buccal aspect (B) were located 2.7 ± 0.7 mm and 2.2 ± 1.0 mm apically to IS at the AB and DBBM sites, respectively. At the AB sites, the peri-implant mucosa was located 4.3 ± 0.9 mm, 4.7 ± 0.9 mm, and 2.0 ± 1.6 mm coronally to C, B, and IS, respectively. The corresponding values at the DBBM sites were 4.3 ± 0.6 mm, 4.8 ± 0.6 mm, and 2.5 ± 0.8 mm, respectively. No statistically significant differences were found. CONCLUSIONS: The treatment of surgically created buccal defects at IPIES sites using Bio-Oss® (Geistlich Biomaterials, Wolhusen, LU, Switzerland) or autogenous bone, concomitantly with a collagen membrane, engenders bone regeneration to a similar extent after 4 months of healing.
Assuntos
Regeneração Óssea , Substitutos Ósseos , Implantes Dentários , Carga Imediata em Implante Dentário , Alvéolo Dental/fisiologia , Animais , Bovinos , Colágeno , Cães , Modelos Animais , Mucosa Bucal/fisiologia , Mucosa Bucal/cirurgia , Alvéolo Dental/cirurgia , Transplante AutólogoRESUMO
O Líquen Plano Oral e o Pênfigo Vulgar são doenças imunológicas crônicas mucocutâneas de etiologias desconhecidas que podem acometer a mucosa oral. Tão importante quanto em neoplasias o papel da angiogênese na patogenia das doenças inflamatórias crônicas é de apreciável interesse, podendo ser considerado um marcador da atividade da doença. Ademais, com o estudo do processo angiogênico nessas lesões tem-se a possibilidade de aprimorar o entendimento do mecanismo patogênico nas mesmas. Este trabalho se propôs a avaliar a atividade angiogênica através da expressão imunoistoquímica do anticorpo anti-CD34, utilizando a técnica da MVC, em 26 casos de LPO reticulares, 14 casos de LPO erosivos, 18 casos de PV e em 15 casos de mucosa oral normal. Os resultados deste experimento foram submetidos a testes estatístico não-paramétricos com nível de significância de 5%. Não foram observadas diferenças estatisticamente significativas entre o número médio de vasos obtidos pela MVC nas lesões. Todavia, foi observado que a mediana dos casos de líquen plano oral foi maior que no grupo de pênfigo vulgar, que por sua vez revelou mediana maior que nos casos de mucosa oral normal (p=0,280). No tocante a contagem microvascular de CD34 em relação à forma clínica dos líquens planos orais (reticular e erosivo), verificou-se uma mediana ligeiramente maior para a forma clínica erosiva. Apesar de os testes estatísticos utilizados não demonstrarem diferença significativa (p=0,720). Ainda que os resultados do presente estudo não permitam a afirmação contundente da participação do processo angiogênico na patogênese e progressão das lesões de líquen plano oral e pênfigo vulgar, sugerimos que este processo está presente em ambas as lesões, porém outros estudos devem ser realizados a fim de que essa hipótese seja fundamentada. (AU)
Oral lichen planus and pemphigus vulgaris are chronic diseases mucous membrane immune of unknown aetiology that can be observed affecting to the oral mucous. A relevant as regards neoplasies the role angiogenesis in the inflammatory chronic disease pathogenesis as it provides a substancial interest can be considered as being an activity diseases marker; besides being through specialised research of this angiogenic process to improve of understanding pathogenic mechanism. This research proposes to assess angiogenic active through of antibody immunohistochemistry expression antiCD34 antibody in 26 OLP of reticular cases, 14 OLP erosives cases, 18 of PV cases and 15 specimens of normal oral mucosa. The result was submitted non-parametric tests of 5% significance level. It is not statistically significant correlacion was seen regarding between average vessels. However, only be effectively observed the median of OLP cases was larger than pemphigus vulgaris in fact proved average larger than oral normal mucosa (p=0,280). Regarding the microvascular count of CD34 concerning clinic form oral lichen planus (reticular and erosion) increased emphasis is more cross-border average for the form erosion clinic. Despite of the statistic tests could not be more effective (p=0,720). Even though, the results of the research is not sufficient to enable to consider of angiogenic process in the pathogenesis and lesions progression of oral lichen planus and pemphigus vulgaris, we suggest this process is present in both forms lesion, however, more studies must be made in the near future in order to prepare a well-founded proposal. (AU)
Assuntos
/metabolismo , Líquen Plano Bucal/fisiopatologia , Neovascularização Patológica/patologia , Pênfigo/fisiopatologia , Estatísticas não Paramétricas , Imuno-Histoquímica/métodos , Mucosa Bucal/fisiologiaRESUMO
Objetivo: Avaliar a percepção dos pacientes quanto às sensações após o uso de enxaguatórios à base de óleos essenciais e àlcool e à base de cloreto de cetilperidíneo. Métodos: Foram constituídos 2 grupos (n= 15) que realizaram 2 bochechos diários durante 3 semanas: G 1 - enxaguatório a base de óleos essenciais e álcool, em bochechos de 30 segundos; G2 - enxaguatório à base de cloreto de cetilperidínio, em bochechos de 60 segundos. Ao final de 3 semanas, os participantes responderam a um questionário sobre desconforto, alteração de paladar, sensibilidade dentária e ressecamento da mucosa oral. Resultados: O desconforto foi de 93,3% para G1 e de 26,6% em G2, sendo o ardor o mais relatado (86,6% em G1 e 26,6% em G2). Não foi relatada sensibilidade ou alteração dentária nos grupos avaliados. O ressecamento da mucosa ocorreu em 66,6% no G 1 e 33,3% no G2. A alteração de paladar ocorreu somente em 13,3% do G1 com diminuição da sensibilidade e gosto metálico. Conclusão: A utilização contínua de enxaguatórios com óleos essenciais e álcool causou maior desconforto quando comparado ao cloreto de cetilperidínio.
Objective: Evaluate the perceptions of patients about the effects of the use of mouthwash based on essential oils and alcohol -based and cetylpyridinium chloride. Methods: 2 groups ( n = 15) who underwent 2 mouthwash daily for 3 weeks were formed: G1 - a mouthwash based on essential oils and alcohol in mouthwash for 30 seconds; G2 - the base of mouthwash cetil peridínio chloride in mouthwashes 60 seconds. At the end of 3 weeks, participants answered a questionnaire on discomfort , change in taste, tooth sensitivity and dryness of the oral mucosa. Results: The discomfort was 93.3 % for G1 and 26.6% in G2, with the ardor as reported (86.6% in G1 and 26.6 % in G2) . It was reported tooth sensitivity or change in study groups. The dryness of the mucosa occurred in 66.6 % in G1 and 33.3% in G2. The taste change occurred in only 13.3% of G 1 with decreased sensitivity and metallic taste . Conclusion: The continuous use of mouthwashes with essential oils and alcohol caused greater discomfort when compared to cetilperidínio chloride.