Effect of Low Intensity Pulsed Ultrasound with Adipose-Derived Stem Cells on Bone Healing around a Titanium Implant in Tibia of Osteoporosis-Induced Rats

골다공증 유도 백서 경골에 티타늄 임플랜트 매식 시 지방조직유래 줄기세포 주입과 저출력 초음파 적용이 골치유에 미치는 영향

  • Lee, Kwang-Ho (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Choi, Yeon-Sik (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Shin, Sang-Hun (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Chung, In-Kyo (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University) ;
  • Kim, Gyoo-Cheon (Department of Oral Anatomy, School of Dentistry, Pusan National University) ;
  • Kim, Cheol-Hun (Department of Dentistry, Dong-A Medical Center) ;
  • Kim, Uk-Kyu (Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University)
  • 이광호 (부산대학교 치의학전문대학원 구강악안면외과학교실) ;
  • 최연식 (부산대학교 치의학전문대학원 구강악안면외과학교실) ;
  • 신상훈 (부산대학교 치의학전문대학원 구강악안면외과학교실) ;
  • 정인교 (부산대학교 치의학전문대학원 구강악안면외과학교실) ;
  • 김규천 (부산대학교 치의학전문대학원 구강해부학교실) ;
  • 김철훈 (동아대학교의료원 치과학교실 구강악안면외과) ;
  • 김욱규 (부산대학교 치의학전문대학원 구강악안면외과학교실)
  • Received : 2011.03.10
  • Accepted : 2011.04.08
  • Published : 2011.05.31

Abstract

Purpose: Osteoporosis, is a major health problem for the elderly and post-menopausal women and shown to alter the properties of bone as well as impair bone healing around titanium implants in both human and animals. The objective of this study was to examine the effect of LIPUS with adipose-derived stem cells on the healing process around a titanium implant in rats with osteoporosis. Methods: Sixteen osteoporosis-induced rats were divided into two groups: an adipose-derived stem cell injected with Low Intensity Pulsed Ultrasound (LIPUS) application group and a control group. Titanium screw implants (diameter, 2.0 mm: length, 3.5 mm, Cowell Medi, Korea) were placed into both tibia of 16 rats, on 8 rats as the control group and the other 8 rats as the experimental group. Rats were sacrificed at different intervals from 1, 2, 4 and 8 weeks after implantation for histopathologic and immunohistochemical analyses. Results: Histopathological analysis revealed newly formed bone in experimental group earlier than that in control group. Especially at 1 week after implantation, more amounts of new bone matrix and collagen around the implant in the experimental group were seen compared with the control group. Immunohistochemical analysis showed that the levels of osteoprotegerin (OPG) expression in the experimental group were increased at early stages compared with that of control group until 2 weeks after implantation. But after 2 weeks, the expression level of OPG similar in both groups. The expression levels of receptor activator of nuclear factor kB ligand (RANKL) were stronger in the experimental group than the control group until 2 weeks after implantation. After 4 weeks, expression of RANKL in experimental group was similar to the control group. Conclusion: The results of this study suggest that LIPUS with Adipose-Derived Stem Cells in implantation could promote bone healing around titanium implants in rats with osteoporosis.

Keywords

References

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