Efficacy of two mouthwashes with cetylpyridinium chloride: a controlled randomized clinical trial

Abstract This study aimed to evaluate the anti-plaque and anti-gingivitis effects of two mouthwashes containing cetylpyridinium chloride (CPC), in comparison to negative control mouthwash. One hundred and twenty subjects were randomly assigned to study groups: test (0.075% CPC and 0.28% zinc lactate), positive control (0.07% CPC) and negative control mouthwash without CPC. All volunteers were examined by a calibrated examiner for the Quigley-Hein Plaque Index (Turesky modification) and Löe-Silness Gingival Index (GI). Gingival severity was also measured by the percentage of sites with positive gingival bleeding. During six weeks, oral hygiene consisted of brushing twice daily with a toothbrush and toothpaste and rising with their assigned mouthwash. Plaque and gingival parameters were assessed at baseline, after four and six weeks of product use. Statistical analyses were performed separately for plaque and gingival indices, by ANOVA, paired t-test and ANCOVA (α < 0.05). After 4 and 6 weeks, all mouthwashes groups presented statistically significant reductions in plaque and gingival parameters as compared to baseline. In comparison to the positive control, the test group presented additional reductions in dental plaque of 19.8% and 16.8%, after 4 and 6 weeks, respectively. For GI, the additional reductions in the test group were 9.7% and 14.3%, at 4 and 6 weeks, respectively. The test group showed additional reduction of 35.3% and 54.5% in the gingival severity, at week 4 and 6, respectively. It is concluded that the mouthwash containing CPC and zinc lactate presents significant anti-plaque and anti-gingivitis effects as compared to positive and negative control mouthwashes.

Prevalence, severity, and risk indicators of gingival inflammation in a multi-center study on South American adults: a cross sectional study

ABSTRACT Objectives: The aim of this study is to investigate the prevalence and severity of gingival inflammation and associated risk indicators in South American adults. Material and Methods: Multi-stage samples totaling 1,650 adults from Porto Alegre (Brazil), Tucumán (Argentina), and Santiago (Chile) were assessed. The sampling procedure consisted of a 4-stage process. Examinations were performed in mobile dental units by calibrated examiners. A multivariable logistic regression model was utilized for associating variables as indicators of gingival inflammation (GI) (Gingival Index ≥0.5). Statistical significance was set at 0.05. Results: A total of 96.5% of the adults have GI. Regarding the severity of GI, 22.5% of participants examined have mild GI, 74.0% have moderate GI, and 3.6% have severe GI. The multivariate analyses identify the main risk indicators for GI as adults with higher mean of Calculus Index (OR=18.59); with a Visible Plaque Index ≥30% (OR=14.56); living in Santiago (OR=7.17); having ≤12 years of schooling (OR=2.18), and females (OR=1.93). Conclusions: This study shows a high prevalence and severity of gingival inflammation, being the first one performed in adult populations in three cities of South America.

Immunohistochemical evaluation of the inflammatory response in periodontal disease

In order to contribute to the knowledge of the pathogenesis of periodontal disease, an immunohistochemical analysis of the density of inflammatory mononucleated cells and the number of dendritic cells was performed using anti-CD4, anti-CD20, anti-CD25, anti-CD68 and anti-protein S-100 antibodies in 17 cases of chronic gingivitis (CG) and 25 of chronic periodontitis (CP). The CD4+ and CD68+ cells exhibited a diffuse distribution in the connective tissue. CD20+ cell distribution was predominantly in groups and the CD25+ cells exhibited a diffuse or focal distribution. The S-100+ cells were identified in the epithelium and the lamina propria, exhibiting distinct morphology and number. The statistical analysis showed no significant differences (p>0.05) between CG and CP regarding the density of the CD4+ and CD20+ cells and the number of S-100+ cells. However, significant differences (p<0.05) were found between the groups in the density of CD25+ and CD68+ cells . The density of macrophages was greater in CG and the level of cellular activation of the lymphocyte infiltrate was greater in CP. No differences were detected between the aforementioned conditions regarding the density of the T and B lymphocytes and to the number of the dendritic cells.

Com o objetivo de contribuir para um melhor entendimento na etiopatogenia da doença periodontal, um análise imuno-histoquímica da densidade das células inflamatórias mononucleares e da quantidade das células dendríticas foi realizada utilizando os anticorpos anti-CD4, anti-CD20, anti-CD25, anti-CD68 and anti-proteína S-100 em 17 casos de gengivite crônica (GC) e 25 casos de periodontite crônica (PC). As células CD4+ e CD68+ exibiram distribuição difusa no tecido conjuntivo, enquanto que a distribuição das células CD20+ foi predominantemente em grupos, e as CD25+ exibiram distribuição ora difusa ora focal. As células S-100+ foram identificadas no epitélio e na lamina própria, exibindo morfologia e números distintos. A análise estatística não demonstrou diferenças estatisticamente significativas em relação a densidade das células CD4+ e CD20+ e no número de células S-100+ entre os casos de CG e PC. Entretanto, houve diferenças em relação a densidade das células CD25+ e CD68+ entre os grupos (p<0,05). A densidade dos macrófagos foi maior em GC e o nível de ativação celular do infiltrado linfocítico foi maior em PC, não havendo diferenças em relação a densidade de linfócitos T e B, bem como no número de células dendríticas entre as condições anteriormente mencionadas.

¿Existe la gingivitis descamativa crónica? / Does chronic desquamative gingivitis exist?

La llamada gingivitis descamativa crónica (G.D.C.), atribuida en sus comienzos a insuficiencia estrogénica en mujeres en menopausia, fue posteriormente observada en otras condiciones, especialmente en el liquen plano y las dermatosis ampollares. Modernamente muchos autores creen que sería el penfigoide cicatrizal la causa principal. Para nosotros sería el liquen plano erosivo. Pensamos que la llamada G.D.C. no tiene una clínica específica, ni tampoco una histología e inmunología que permitan su diagnóstico. Esto, unido al tratamiento, que se relaciona a la causa que la produce, nos permite considerar que no se trata de una verdadea enfermedad y ni siquiera de un síndrome y que frente a una gingivitis crónica habrá que determinar a través de estudios completos la causa que la produce. La G.D.C. no existiría, por lo tanto, como una entidad con caracteres propios.