Evaluation of bone response by resonance frequency analysis of anodized implants
노현기, 허성주, 류인철,
소속 상세정보
노현기 ( Roh Hyun-Ki ) - 서울대학교 치과대학 치과보철학교실
허성주 ( Heo Seong-Joo ) - 서울대학교 치과대학 치과보철학교실
류인철 ( Rhyu In-Chul ) - 서울대학교 치과대학 치주과학교실
KMID : 0362420050430060745
Abstract
Statement of problem: Resonance frequency analysis has been increasingly served as a noninvasive and objective method for clinical monitoring of implant stability. Many clinical studies must be required for standardized data using RFA.
Purpose: This study was performed to evaluate RFA value changes in two anodized implant groups.
Materials & Methods: Among a total of 24 implants, twelve screw shaped implants as a test group (H2-R8.5) were manufactured, which had a pitch-height of 0.4 mm, an outer diameter of 4.3 mm, a length of 8.5 mm, and external hexa-headed, were turned from 5 mm rods of commercially pure titanium (ASTM Grade IV, Warantec Co., Seoul, Korea), and another twelve implants as a control group were Branemark Ti-Unite MK4 (diameter 4.0 mm, length 8.5 mm). Each group was installed in tibia of rabbit. Two implants were placed in each tibia (four implants per rabbit). Test two implants were inserted in right side and control two in left side. ISQ values were measured using OsstellTM (Integration Diagnostics Ltd. Sweden) during fixture installation, and 12 weeks later and evaluated the RFA changes.
Results: Mean and SD of baseline ISQ values of test group were 75.0 +/- 3.4 and 68.7 +/- 8.1 for control group. Mean and SD of ISQ values 12 weeks after implant insertion were 73.2 +/- 4.7 for test group and 72.6 +/- 3.9 for control group. There were no statistically significant differences between groups in ISQ values after 3months (P>0.05). From the data, RFA gains after 3 months were calculated, and there was statistically significant difference between groups (P<0.05).
Conclusion: Although there were RFA changes between groups, implant stability after experimental period shows alike tendency and good bone responses.
키워드
resonance frequency analysis (RFA);Implant stability;Anodized impalnt surface
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