• Title/Summary/Keyword: Artificial periodontal ligament

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Studies on Root Restoration: Embedding Titanium and Cultured Periodontal Ligament Fibroblasts into the Intradentinal Cavities in Dogs.

  • Yamamoto, T.;Hirata, M.;Iwarnatsu, Y.;Tadatomo, Y.;Shimonishi, M.;Murakami, Y.;Nagaoka, S.;Higuchi, S.;Sato, H.;Kanehira, M.;Kindaichi, K.;Komatsu, M.
    • Proceedings of the KACD Conference
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    • 2001.11a
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    • pp.568.1-568
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    • 2001
  • The purpose of our study is new formation of periodontal ligament (PDL) around titanium implants. In this study, we investigated histologically whether cultured periodontal ligament fibroblasts (CPLFs) would form new PDL on titanium implants in beagle dogs. PDL fibroblasts were obtained from upper premolars of dogs and cultured in ${\alpha}-MEM$ supplemented with 10% FBS. Some CPLFs were cultured on glass-beads-sandblasted titanium specimen. Artificial intradentinal cavities were prepared through alveolar bone to dentin of lower premolars.(omitted)

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THE EFFECT OF A CHITOSAN COATING OF DENTAL IMPLANT ON THE SHOCK ABSORPTION UNDER IMPACT TEST (키토산으로 표면처리된 인공치아의 충격전달에 관한 연구)

  • Kim, Ki-Hong;Lee, Yong-Chan;Cho, Byoung-Ouck;Choi, Kui-Won;Kwon, Ick-Chan;Bae, Tae-Soo
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.27 no.1
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    • pp.9-14
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    • 2001
  • With the object of providing a temporary artificial periodonal ligament-like membrane around the dental implant, 10 Branemark type implants were coated with commercially available chitosan(Fluka Co., Buchs, Switzerland) which has a molecular weight of 70,000 and 80% deacetylation degree. Once this bioactive hydrophillic polymer(chitosan) contacts with blood or wound fluids, it becomes swollen and penetrates into the adjacent cancellous bone. Thus the interface between implant and surrounding bone is completely filled with chitosan. This tight junction in early healing phase enhances primary stability. The chitosan coated dental implants were implanted into the fresh patella bones from porcine knees, since the thickness of cortical bone is relatively even and their cancellous structure is homogenous. To test the shock absorbing effect, 1mm delta-rogette strain gage was installed behind the implant. The results showed 1. The principal strain peak value directed to the impact of coated implant was 0.064 0.018(p<0.05) and that of uncoated implant was 0.095(0.032 p<0.05). 2. The peak time delay of coated implant was 0.056sec(0.011 p<0.05) and that of uncoated implant was 0.024sec(0.009 p<0.05). It can be reasoned from this results that the chitosan coating has a shock absorbing effect comparable with a temporary artificial periodontal ligament.

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The Effect of a Shock-Absorbable Polymer(Chitosan) on the Initial Stability and Dynamic Behavior of Dental Implant (충격흡수용 고분자재료의 이용이 Implant 초기안정성과 동적거동에 미치는 영향)

  • Joo, W.;Choi, K.;Kwon, I.C.;Choi, J.B.;Moon, H.J.;Shin, J.W.;Lee, Y.C.
    • Proceedings of the KOSOMBE Conference
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    • v.1997 no.11
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    • pp.337-342
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    • 1997
  • Dental implant has been increasingly used to recover the masticatory unction of tooth. It has been well known that the success of dental implant is heavily dependent on initial stability and long-term osseointegration due to optimal stress distribution in the surrounding bones. The role of periodontal ligament, removed during operation, is to absorb impact force and to distribute them to alveolar bone. or this reason, the study for artificial periodontal ligament has become an important issue in this field. In this study, chitosan was coated on dental implant or the purpose of replacing the role of intact periodontal ligament. The results by experiment and FEM analysis showed : I) Initial stability of dental implant was significantly increased(35%) when the implant was coated with chitosan. II) The coated implant showed higher impact absorption, more even stress distribution and lower stress magnitude under impact force than uncoated implant. Accordingly, the micro-fracture of the surrounding bones due to impact force would be lessened by chitosan coating on dental implant.

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