Maxillofacial Plastic and Reconstructive Surgery

Korean Association of Maxillofacial Plastic and Reconstructive Surgeons (대한악안면성형재건외과학회)
권호 표지

AN EXPERIMENTAL STUDY ON THE OSSEOINTEGRATION OF THE TI-6AL-4V BEAD COATING IMPLANTS

Ti-6Al-4V 비드코팅 임프란트 시제품의 골유착에 대한 실험적 연구

  • Woo, Jin-Oh (Dr. Woo's Dental Clinic) ;
  • Park, Bong-Wook (Department of Oral & Maxillofacial Surgery, School of Medicine and Institute of Health Science, Gyeongsang National University) ;
  • Byun, June-Ho (Department of Oral & Maxillofacial Surgery, School of Medicine and Institute of Health Science, Gyeongsang National University) ;
  • Kim, Seung-Eon (Department of Materials Processing, Korea Institute of Machinery & Materials) ;
  • Kim, Gyoo-Cheon (Department of Oral Anatomy, School of Dentistry, Pusan National University) ;
  • Park, Bong-Soo (Department of Oral Anatomy, School of Dentistry, Pusan National University) ;
  • Kim, Jong-Ryoul (Department of Oral & Maxillofacial Surgery, School of Dentistry, Pusan National University)
  • 우진오 (우진오치과의원) ;
  • 박봉욱 (경상대학교 의학전문대학원 치과학교실 구강악안면외과, 경상대학교 건강과학연구원) ;
  • 변준호 (경상대학교 의학전문대학원 치과학교실 구강악안면외과, 경상대학교 건강과학연구원) ;
  • 김승언 (한국기계연구원 공정연구부) ;
  • 김규천 (부산대학교 치의학전문대학원 구강해부학교실) ;
  • 박봉수 (부산대학교 치의학전문대학원 구강해부학교실) ;
  • 김종렬 (부산대학교 치의학전문대학원 구강악안면외과학교실)
  • Published : 2008.01.31
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Abstract

The geometric design of an implant surface may play an important role in affecting early osseointegration. It is well known that the porous surfaced implant had much benefits for the osseointegration and the early stability of implant. However, the porous surfaced implant had weakness from the transgingival contamitants, and it resulted in alveolar bone loss. The other problem identified with porous surface implant is the loss of physical properties resulting from the bead sintering process. In this study, we developed the new bead coating implant to overcome the disadvantages of porous surfaced implant. Ti-6Al-4V beads were supplied from STARMET (USA). The beads were prepared by a plasma rotating electrode process (PREP) and had a nearly spherical shape with a diameter of 75-150 ${\mu}m$. Two types of titanium implants were supplied by KJ Meditech (Korea). One is an external hexa system (External type) and the other is an internal system with threads (Internal type). The implants were pasted with beads using polyvinylalcohol solution as a binder, and then sintered at 1250 $^{\circ}C$ for 2 hours in vacuum of $10^{-5}$ torr. The resulting porous structure was 400-500 ${\mu}m$ thick and consisted of three to four bead layers bonded to each other and the implant. The pore size was in the range of 50-150 ${\mu}m$ and the porosity was 30-40 % in volume. The aim of this study was to evaluate the osseointegration of the newly developed dental implant. The experimental implants (n=16) were inserted in the unilateral femur of 4 mongrel dogs. All animals were killed at 8 weeks after implantation, and samples were harvested for hitological examination. All bead coated porous implants were successfully osseointegrated with peripheral bone. The average bone-implant contact ratios were 84.6 % (External type) and 81.5 % (Internal type). In the modified Goldner's trichrome staining, new generated mature bones were observed at the implant interface at 8 weeks after implantation. Although, further studies are required, we could conclude that the newly developed vacuum sintered Ti-6Al-4V bead coating implant was strong enough to resist the implant insertion force, and it was easily osseointegrated with peripheral bone.

Keywords

References

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