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A Novel Microfluidic Platform for Evaluation of Bioengineered Implants
( Sangbae Park ),( Jae Eun Kim ),( Jae Woon Lim ),( Byeongjoo Park ),( Jong Hoon Chung ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2
A dental implant is defined as an artificial tooth root that is usually made of a special metal and surgically implanted in the region of a missing tooth. A highly osseointegrative dental implant surrounded by reconstructed periodontium is a promising tooth replacement option that mimics the structure and physiological functions of natural teeth. However, there is a shortage of in vitro models to effectively evaluate the bioengineered implants (bioimplants) as well as their integration with reconstructed tissues. In this study, a bioimplant-on-a-chip (BoC) platform was developed and applied to investigate the cellular responses of bioimplants. The cell culture conditions on BoC were optimized using Live/Dead assay, WST-1 assay, and immunostaining. To evaluate the osseointegration of PDL-like tissues on the implants, the expression of cementum protein-1 (CEMP-1) was observed using immunofluorescence imaging. As a result, this platform successfully mimicked the structure of the natural periodontium tissue. The induced PDL-like tissues showed enhanced collagen and periostin expression. Furthermore, the osseointegration of PDL-like tissues on the bioimplants was evaluated using BoCs. The results showed that the distribution of expressed CEMP-1 was not observed around the CPCs, whereas it was very high around the bioimplant. This finding indicates that this platform can effectively assess the osseointegration of bioimplants. As most studies on implants rely on in vivo tests, this platform holds significant promise for the development and evaluation of novel dental implants.
A Novel Microfluidic Platform for Evaluation of Bioengineered Implants
( Sangbae Park ),( Jae Eun Kim ),( Jae Woon Lim ),( Byeongjoo Park ),( Jong Hoon Chung ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2
A dental implant is defined as an artificial tooth root that is usually made of a special metal and surgically implanted in the region of a missing tooth. A highly osseointegrative dental implant surrounded by reconstructed periodontium is a promising tooth replacement option that mimics the structure and physiological functions of natural teeth. However, there is a shortage of in vitro models to effectively evaluate the bioengineered implants (bioimplants) as well as their integration with reconstructed tissues. In this study, a bioimplant-on-a-chip (BoC) platform was developed and applied to investigate the cellular responses of bioimplants. The cell culture conditions on BoC were optimized using Live/Dead assay, WST-1 assay, and immunostaining. To evaluate the osseointegration of PDL-like tissues on the implants, the expression of cementum protein-1 (CEMP-1) was observed using immunofluorescence imaging. As a result, this platform successfully mimicked the structure of the natural periodontium tissue. The induced PDL-like tissues showed enhanced collagen and periostin expression. Furthermore, the osseointegration of PDL-like tissues on the bioimplants was evaluated using BoCs. The results showed that the distribution of expressed CEMP-1 was not observed around the CPCs, whereas it was very high around the bioimplant. This finding indicates that this platform can effectively assess the osseointegration of bioimplants. As most studies on implants rely on in vivo tests, this platform holds significant promise for the development and evaluation of novel dental implants.
이동단말 관리서비스를 위한 OMA-DM 프로토콜의 임베디드 XML파서 설계
안희준(Heejune Ahn),김용호(Yong-ho Kim),정승호(Seung-ho Jeong),이재광(Jaekwang Lee),박병주(Byeongjoo Park) 한국IT서비스학회 2009 한국IT서비스학회 학술대회 논문집 Vol.2009 No.1
이동통신 단말기의 기능과 서비스가 증가로 이동 단말관리를 위하여 SyncML과 OMA-DM의 표준이 정의되고 활용되고 있다. 이 두 프로토콜은 XML 기반 메시지방식에 기초하고 있으며, Sequence와 Atomic 등 복합 명령어 구조를 사용하고 있어, 메모리와 계산속도 등에 제약이 있는 임베디드 시스템에서의 효과적인 구현을 필요로 한다. 본 연구는 자체 OMA-DM 에이젼트의 개발과정에서 설계한 효과적인 임베디드 OMA-DM용 XML 파서의 설계에 대하여 소개하고, 검증서버 및 ㈜ DKI사의 DM서버에서 실험한 결과를 제시한다.