Success Rate of Stainless-steel Crowns Placed on Permanent Molars among Adolescents.

Aim And Objective: To evaluate the success rate of stainless-steel crowns (SSCs) placed on permanent molars among adolescents in King Abdulaziz University Dental Hospital (KAUDH).

Materials And Methods: Electronic records of KAUDH patients aged 10 to 15 years who had an SSC placed on a permanent molar from 2013 to 2018 were reviewed. The patients were contacted by telephone and were invited to participate in the study.

Stability issues and approaches to stabilised nanoparticles based drug delivery system.

Nanoparticles form the fundamental building blocks for many exciting applications in various scientific disciplines due to its unique features such as large surface to mass ratio, targeting potential, ability to adsorbed and carry other compound which makes them suitable for biomedical applications. However, the problem of the large-scale synthesis of nanoparticles remains challenging due to physical instability associated with nanoparticles which lead to generation of aggregates particles with high polydispersity index (PDI) indicating low particle homogeneity and eventually loss of their special nanoscale properties. The stabilisation concept can be generated by repulsive electrostatic force, which nanoparticles experience, when they are surrounded by a double layer of electric charges.