ABSTRACT
A perda precoce dos dentes decíduos anteriores é relativamente comum em Odontopediatria e está associada principalmente a traumas acidentais e cáries múltiplas. Através de uma revisão de literatura, este artigo buscou apresentar a importância da reposição protética dos elementos dentários perdidos, por meio de aparelhos denominados mantenedores de espaço estético-funcionais e discutir aspectos de interesse clínico relacionados à etiologia das perdas localizadas e suas consequências, a função e os tipos de dispositivos ortodônticos, buscando orientar os profissionais que prestam atendimento odontológico a crianças. O tema abordado nesta revisão tem sido motivo de estudo e discussão por muitos anos; entretanto, o desejo dos pais e a aceitação pelo paciente irão determinar a colocação de uma prótese.
The early of the front deciduous teeth is relatively common in Pediatric Dentistry. It is associated mainly toaccidental injuries and multiple dental decays. Through a literature revision, this article aims on presentingthe importance of prosthetic replacement of the lost dental elements, using devices called aesthetic functional space maintainers. This study approached aspects of clinical interests related to the etiology of the located losses and their consequences, the function and the types of orthodontic devices, serving for orientation to professionals who provide dental service to children. This presented subject in this revision has been reason of study and discussion for many years, however, the parentsïdesire and the patientïs acceptance will determinate the choice of a denture.
Subject(s)
Tooth, Deciduous , Space Maintenance, Orthodontic , Orthodontics/methods , Pediatric Dentistry/methodsABSTRACT
Two different DNA-based techniques viz, simple sequence repeat (SSR) and inter simple sequence repeat (ISSR) markers were used to estimate genetic diversity among 20 rice genotypes possessing different physiological mechanisms contributing to salt tolerance. A total of 11 clear and repeatable bands were amplified from ten selected SSR primers pairs and 43 fragments were detected from nine ISSR primers. The level of polymorphism was 1.1% with SSR compared to 90.7% with ISSRs. Mean genetic similarity of 0.88 based on SSRs and 0.85 using ISSRs was observed. A total of 43 (39 polymorphic) and 11 bands were detected using 9 ISSR primers and 10 well distributed mapped SSR markers, respectively. Estimates of genetic similarity of ISSRs based on the 39 polymorphic markers between 20 rice cultivars ranged from 0.55 for PR108/CSR19 to 0.94 for Pokkali/CSR20 with an average of 0.81. The estimates revealed by the 11 polymorphic SSR bands showed the average value (0.94) and also the range of genetic similarity (from 0.86 to 1.00 for CSR22/CSR18 and CSR24/CSR20, respectively) reflecting their hyper variability and their high resolution power. The findings are likely to expedite breeding new salt tolerant cultivars by involving parents from diverse molecular clusters.