4.5 Article

Analysis of implant stability changes in immediate loading using a laser displacement sensor in vivo and comparison of its sensitivity with that of resonance frequency analysis

Journal

CLINICAL ORAL IMPLANTS RESEARCH
Volume 32, Issue 11, Pages 1341-1356

Publisher

WILEY
DOI: 10.1111/clr.13835

Keywords

bone histomorphometrical analysis; dental implants; immediate loading; laser displacement sensor; micromotion; osseointegration; rabbit; resonance frequency analysis

Funding

  1. JSPS KAKENHI [23592893]
  2. Grants-in-Aid for Scientific Research [23592893] Funding Source: KAKEN

Ask authors/readers for more resources

Immediately loaded implants showed the lowest stability right after loading, but gradually increased over time. Resonance Frequency Analysis (RFA) is useful for examining stability changes and initial stability, but cannot determine absolute stability after integration. There is a close correlation between ISQ changes and actual micromotion, but not with the histomorphometrical data.
Objective The aim of this study was to analyze the stability changes in immediately loaded implants by using an in vivo quantitative measurement of micromotion under functional dynamic loading and to verify the sensitivity of Resonance Frequency Analysis (RFA) as compared to that of actual micromotion. Materials and methods The micromotions of immediately loaded implants placed in the tibia of 11 rabbits were monitored using a laser displacement sensor. Functional dynamic loading forces were applied 5 days a week for 6 weeks. The implant stability quotient (ISQ) was monitored using RFA. Results The micromotion of the almost-loaded implants increased to peak values the day after loading was started and subsequently reached a plateau gradually. The ISQ changes in the loaded implants closely correlated with the alterations of the actual micromotion (r = -0.98, p < .01). Although the ISQ value itself correlated with the measured micromotion at the time of initial fixation (r = 0.73, p < .05), it did not correlate with the micromotion of the implant that acquired integration. No close correlation was observed between the ISQ and the histomorphometrical data. Conclusion The immediately loaded implants showed the lowest stability immediately after the start of loading, which gradually increased thereafter. RFA is considered a useful method for examining stability changes and initial stability; however, it cannot determine the absolute magnitude of the stability after integration.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.5
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available