| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.674 |
| 발표분야 | 의료용 고분자 부문위원회 |
| 제목 | Mechanical properties of acrylic bone cement incorporated with vinyl groups |
| 초록 | Introduction Acrylic bone cements are widely used in dentistry and orthopaedic surgery. Many researches have been carried out to improve the mechanical properties of bone cements. Some studies include addition of small quantities of ingredients such as hydroxyapatite(HA), the silanation of ceramic oxides in the cement matrix1. Montmorillonite(MMT) as nanocomposites based on layered inorganic offer improved stiffness and strength2. Moreover, the surface modification of MMT through grafting of 3-(trimethoxysilyl)propyl methacrylate(γ-MPS)(MPS-MMT) may make MMT dispersed easily in liquid MMA3. The aim of this study was to prepare [MMT or MPS-MMT]-containing bone cements with improved mechanical properties. For this purpose, MMT or MPS-MMT was added in various amounts to bone cement. The effects of composition on the properties of compressive strength and compressive elastic modulus were examined. The morphology of fractured specimens was examined by SEM. Materials and Methods The cements were prepared by hand-mixing the powder containing MMT or MPS-MMT and the liquid part and the resulting paste was injected in the dough state into cylindrical glass molds(h=12㎜, Φ=6㎜; ASTM F451-86). The compressive test for all specimens were performed at a speed of 20㎜/min on a Instron 4482 MTS. Results and Discussion FT-IR spectra revealed the presence of carbonyl groups and the shoulder at 1719.14㎝-1 in MMT silanized with γ-MPS[Fig. 1(c)], comparable with the similar stretching band at 1720.94㎝-1 in pure γ-MPS[Fig. 1(a)], is relative to the "free" counterparts of C=O groups. Compressive strength of bone cement containing 0.1% MMT was found to be 121.83±1.39MPa, and it was observed that MMT addition caused an increase of up to 15%[Fig. 2]. In bone cement containing 1% MPS-MMT, compressive strength at 1% MPS-MMT was found to be 117.40±1.84MPa, and it was observed that MMT addition caused an increase of up to 12%[Fig. 2]. MMT or MPS-MMT addition caused an increase in compressive strength until 1%. Compressive modulus showed that 0.3% and 0.5% MMT-bone cements increased up to 4% and 6%, relatively and 1% MPS-MMT-bone cements increased up to 8%[Fig. 3]. Reference 1. M. Abboud, S. Vol and E. Duguet, Journal of Materials Science: Materials in Medicine, 11, 295 (2000). 2. T. J. Pinnacaia and G. W. Beall, Polymer-Clay Nanocomposites, John Wiley & Sons, Inc., 2001, pp111. 3. K. Servetci, F. Korkusuz and N. Hasirci, Polymer Testing, 23, 145 (2004). |
| 저자 | 조은희1, 김승수1, 손은희2, 임진숙2, 신병철1 |
| 소속 | 1한국화학(연), 2충남대 |
| 키워드 | Montmorillonite; PMMA bone cement; 3-(trimethoxysilyl)propyl methacrylate(γ-MPS); mechanical property |
