Finite element analysis of stress concentration between surface coated implants and non surface coated implants - An in vitro study.

Background: To determine qualitative comparison in stress distribution between surface coated implants and non surface coated implants using 2 different lengths and vertical, oblique, and lateral forces.

Material And Methods: 3 dimensional finite element study was carried out at first molar site with 4 surface coated and 4 non surface coated implants using mimic 8.11, solid edge 2004, hypermesh 9.

A new PEG-lipid conjugate micelle for encapsulation of CdSe/ZnS quantum dots.

A new polymer conjugate of poly(ethylene glycol) (PEG) and 10,12-pentacosadiynoic acid (PCDA), PEG-PCDA conjugate, was synthesized by coupling reaction between carboxyl group of PCDA and hydroxyl group of PEG. Luminescent CdSe/ZnS QDs were encapsulated in the polymer micelles of mixtures of PEG-PCDA and PCDA using solid dispersion method to prepare water-soluble and biocompatible QD micelles. Upon UV-irradiation, the core of QD micelles was further stabilized by intramicellar crosslinking between neighboring PCDA moieties.