Required time for pre-oncological dental management - A rapid review of the literature.

This study identified the scientific literature comparing the influence of different times in which dental procedures were performed before the oncological treatments (radiotherapy and/or chemotherapy) on the risk of oral complications development. MEDLINE/PubMed and Embase databases were searched, and articles were selected by title, abstract and full-text assessment. The search identified 2,356 articles and three retrospective observational studies were included. Data were collected and analyzed according to the dental procedure, the time before oncological treatment, and oral complications. Risk of bias (ROBINS) and certainty of evidence (GRADE) were evaluated. Pairwise meta-analyses were performed from dental extractions (Exo) data according to the time which were performed and ORN development using a random-effect model (RR and 95 % CI, p < 0.05). meta-analyses showed a higher risk of ORN development in patients with Exo performed < 2 weeks before oncological treatment than in those who Exo was performed > 2 weeks ≤ 1 month before oncological therapy (RR 1.29; 95 % CI 1.12-1.48; p < 0.01). There was a higher prevalence of oral mucositis (OM) in patients who received periodontal treatment ≤ 3 weeks before oncological therapy than those who received dental procedures > 3 weeks ≤ 6 months before. Although the risk of bias ranged from serious to critical, with very low certainty of evidence, the findings suggest that dental extractions should be performed within > 2 weeks before oncological treatment to avoid ORN complications. More studies are needed to conclude the appropriate time to perform dental procedures to decrease other associated oral complications. (CRD42021272652).

Prevalência e posição de caninos superiores impactados e sua relação com reabsorção radicular / Prevalence and position of impacted maxillary canines and their relation with root resorption

Objetivo: este estudo teve como objetivo avaliar a posi-ção e a prevalência de caninos maxilares inclusos supe-riores bem como a presença de reabsorção radicular emdentes adjacentes. Materiais e método: foram examina-das 372 radiografias panorâmicas, de pacientes entre 13e 50 anos de idade, realizadas, entre os anos de 2008 e2013, em duas instituições de ensino. As radiografias fo-ram examinadas por um único avaliador, com o auxíliode negatoscópio e lupa com diâmetro de 90 mm e au-mento de 2,5 vezes. Os dados foram submetidos à aná-lise estatística pelo teste Qui-Quadrado (? = 5%). Resul-tado: foram encontradas um total de 13 radiografias compresença de caninos superiores inclusos, portanto, umaprevalência de 3,5%. A idade foi um fator que, estatis-ticamente, influenciou na presença de caninos inclusos(p = 0,040), sendo mais prevalente em pacientes comidade de 13 a 30 anos do que em pacientes de 31 a50 anos. A retenção de caninos foi mais recorrente nogênero feminino, porém, sem significância estatística (p= 0,163). A reabsorção do dente adjacente ocorreu em15,4% dos casos. Conclusão: a prevalência de caninosinclusos foi dependente da idade, a qual influenciou apresença de caninos inclusos, e a posição mésio-angu-lada foi predominante em todos os casos.

Reflections about adhesive systems / Reflexiones acerca de los sistemas adhesivos

The adhesive systems are responsible for an efficient union between teeth and resin, resulting in a longevity restoration. They are organic molecules di or multifunctional that contain reactive groups that interact with dentin and with the resin monomer of composite resin. The adhesive systems are characterized by wet adhesion, which is a result of presence of hidrophylics radicals in their compositions, to promote a better bond and the best properties of the adhesion. Adhesive systems may use two different strategies to interact with the dental structure: total-etching and self-etching technique. The total-etching systems require a conditioning, a rinsing and a priming step in order to allow involvement of collagen fibers by the resin monomers and the formation of the so-called ‘hybrid layer’. The total-etching promotes the cleaning of dentin, also promotes superficial demineralization and delivers collagen fibrils to participate of an interface union mechanism teeth/ adhesive system/restorative material. Self-etching adhesive systems are characterized by demineralization and infiltration of resin monomers simultaneously. This technique is attractive because reduced sensitivity associated with retaining the smear layer and smear plugs, thereby, minimize the possibility of inadvertent contamination of the bonding surface with dentinal surface through dentinal fluid transudate.

Los sistemas adhesivos son responsables de una unión eficaz entre los dientes y la resina, dando como resultado una restauración durable. Son moléculas orgánicas bi o multifuncionales que contienen grupos reactivos que interactúan con la dentina y con el monómero de resina de composite. Los sistemas adhesivos se caracterizan por la adhesión húmeda, que es el resultado de la presencia de radicales hidrofílicos en sus composiciones, para promover una mejor adherencia y las mejores propiedades de la adhesión. Los sistemas adhesivos pueden utilizar dos estrategias diferentes para interactuar con la estructura dental: Técnica de grabado total y auto-grabado. Los sistemas de grabado total requiere un acondicionamiento, un lavado y un paso de priming con el fin de permitir la participación de las fibras de colágeno por los monómeros de resina y la formación de la llamada capa híbrida. El grabado total promueve la limpieza de la dentina, también promueve la desmineralización superficial y condiciona a las fibrillas de colágeno para participar de un mecanismo de interfaz de unión diente/sistema adhesivo /material de restauración. Los sistemas adhesivos autograbantes se caracterizan por la desmineralización y la infiltración de los monómeros de resina de forma simultánea. Esta técnica es atractiva debido a la sensibilidad reducida asociada a conservar la capa de barro dentinario y tapones de barro dentinario, reduciendo al mínimo la posibilidad de contaminación accidental de la superficie de unión con la superficie de la dentina a través del líquido dentinario trasudado.