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2001 Fiscal Year Final Research Report Summary

Development of evaluation system for dental implant mobility (stability)

Research Project

Project/Area Number 11450162
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Measurement engineering
Research InstitutionOSAKA DENTAL UNIVERSITY (2001)
Okayama University (1999-2000)

Principal Investigator

SARATANI Keiji  OSAKA DENTAL UNIVERSITY, DENTISTRY, LECTURER, 歯学部, 講師 (60170817)

Co-Investigator(Kenkyū-buntansha) MITSUDA Takashi  OKAYAMA UNIVERSITY, MEDICAL SCHOOL, ASSISTANT, 医学部, 助手 (30335591)
Project Period (FY) 1999 – 2001
KeywordsIMPLANT / MOBILITY / OSSEOINTEGRATION
Research Abstract

We have previously developed an automatic diagnostic system for tooth mobility, for measuring the biomechanical properties of human periodontium. Since the impedance head of the system is too large to measure mobility in an implant abutment and a molar, a simplified testing instrument called T-M tester was developed. A single-frequency vibration is applied to the tooth surface, an acceleration response is measured, and then the mechanical mobility of the priodontium is calculated. The tooth-movement transducer of the probe utilized a set of bimorph piezoelectric ceramic disks. It is therefore small, light, and suitable for oral examination. The basic characteristics of transducer and clinical applicability of the measurement probe are confirmed using an artificial model.
The T-M tester was applied to implants to determine the difference of viscoelastic properties between periodontium and peri-implantium. The obtained results were as follows : it was possible to measure the implant mobility by T-M tester. Mobility-Index scores of the implants were smaller than those of teeth.
We applied the same principle of T-M tester and developed an Implant Movement (IM) checker. In order to obtain the appropriate measuring conditions, we examined the IM checker on natural teeth. Moreover, we verified its performance by using artificial tooth models and implant models. In clinical trials, IM checker was able to evaluate the implant mobility (stability) and long-term change of implant integration.
The newly developed IM checker had sufficient measuring reliability and we could objectively estimate the implant movement in dental clinics.

  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] Hisao OKA: "Development of a dental implant movement checker"岡山大学医学部保健学科紀要. 11. 25-34 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] HISAO OKA et al.: "Development of a dental implant movement checker"Bull Fac. Health Sci, Okayama Univ. Med. Sch.. 11. 25-34 (2000)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2003-09-17  

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