• Jungsung, Kim
  • Professor
  • Konyang University

Curriculum Vitae

Education

2011. 연세대학교 대학원 이학박사
2016. 한양대학교 대학원 기술경영학 박사수료

Professional Experience

2014 ~ 현재 건양대학교 미래융합기술연구원 3D 융합기술연구소 연구소장
2016 ~ 2017 건양대학교 K-ICT 3D프린팅 지역센터 센터장
2014 ~ 2015 건양대학교 산학협력단 부단장
2006 ~ 2014 ㈜코렌텍 중앙기술연구소 연구소장/이사

Research Interests

메디컬 3D 프린팅(정형/신경외과용 임플란트 등)
인공관절, 척추임플란트, 골절용 임플란트 설계 및 해석

Honors & Awards

2013. 식품의약품안전청장 표창
2012. 으뜸기술상 지식경제부 장관상

Publications

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Abstract

금속 3D 프린팅 기술의 의료분야 적용 사례 : 다공성 티타늄 척추유합케이지 연구

Many attempts of applying 3D printing technology in medical fields have been done since 3D printing technology was introduced. 3D printing is done by building up layers of powder or liquid materials so it made possible to build structures that was difficult to do it by traditional machining works. 3D printed medical devices have been used applied in orthopedic especially. Mechanical properties are very important for safety and stability in orthopedic device because medical device has strength and elastic modulus to retain until bone regeneration. Commonly Titanium and PEEK are used in spinal interbody fusion. Titanium materials have good char-acteristics to integrate with bone and good strength more than polymeric materials, but have possibility to subside into the bone caused by high elastic modulus. On the other hand, PEEK Materials have so low elastic modulus that stress shielding is avoided. However lack of bone ingrowth characteristics is disadvantage.
If we control the parameters of porous structure, elastic modulus of titanium cage could be decreased like polymer cage or less. In this study, 3D porous posterior lumbar interbody fusion cage is designed with 3 types of porous structures to reduce stiffness like as bone or PEEK. The parameters of porous structure, as like pore size, strut thickness, unit cell size, and porosity, were tunable for controlling elastic modulus. Furthermore inner frame parts at anterior and posterior in cage were designed to enhance the strength of cage. Then we fabricated 3D porous cages by metal 3D printer with pure titanium(Grade 4). To evaluate strength and stiffness, analysis of mechanical properties was performed through mechanical test with fabricated cages.
As results of comparison with PEEK cage, it is showed stiffness of metal fusion cages with porous structure were decrease as like PEEK cages. Additionally, yield loads were increased in porous metal cages with frame parts.
3D metal fusion cage can induce to integrate with bone, caused by biocompatible material titanium, and reduces subsidence. Consequently, the mechanical properties of metal cage could be controlled as designer’s intent. So, we expect that success of interbody fusion is increased through bone integration and mechanical stability.
In the future, the study of 3D metal prosthesis is needed more in clinical study besides mechanical analysis under fatigue load.