원문정보
초록
영어
In recent years, it has been become important to develop an effective material to be used as scaffolds for bone fixation in surgical field. PLA (Poly lactic acid), PGA (Poly glycolic acid), PLGA(Poly lactic-co-glycolic acid) and PLLA(Poly (L)-lactic acid) are well known to absorbable polymers that exhibit sufficiently low toxicity to useful for internal applications. So, we are study on the one of absorbable polymers as scaffolds (Plates and screws) consisting of PLGA (85/15). The aim of this study is to fabricate this plates and screws using an injection molding and to evaluate its surface, thermal and mechanical properties. The obtained plates and screws were observed with SEM, NMR, XRD, XPS, FTIR, DSC, TGA and mechanical moment (tensile and compressive strength). The glass temperature and molecular of PLGA were influenced by absorbed moisture. Therefore, obtained injection moldings were stored at 40°C and 20%, 50%, 80% relative humidity. Weight fraction absorbed free moisture was determined using a chemical balance.
목차
1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Experimental Methods
3. Results and Discussions
3.1. Surface properties of absorbable PLGA plates
3.2. Thermal properties of absorbable PLGA plates
3.3. Mechanical properties of absorbable PLGA plates
4. Conclusions
References