International Journal of Experimental Dental Science

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VOLUME 4 , ISSUE 2 ( July-December, 2015 ) > List of Articles


What is the Effect of Implant-tooth Distance on Resonance Frequency Analysis Measurements?

Mohammed Jasim Aljuboori, Luiz Carlos Magno Filho, Farah Saadi Al-Obaidi, Hussein Ali Al-Wakeel, Maan Ibrahim Al-Marzok

Citation Information : Aljuboori MJ, Filho LC, Al-Obaidi FS, Al-Wakeel HA, Al-Marzok MI. What is the Effect of Implant-tooth Distance on Resonance Frequency Analysis Measurements?. Int J Experiment Dent Sci 2015; 4 (2):124-129.

DOI: 10.5005/jp-journals-10029-1110

Published Online: 01-04-2010

Copyright Statement:  Copyright © 2015; The Author(s).



The volume and density of the bone surrounding an implant directly affect the implant stability during the healing period.

The aim of this study was to determine the correlations between resonance frequency analysis (RFA) readings and implant-tooth distances at the crestal and average apicalcrestal levels.

Materials and methods

Nine patients received 22 implants. Periapical radiographs were taken at 6 weeks, and the implant-tooth mesial and distal crestal level distances were measured, along with the mesial and distal apical levels. The average mesial (AM) and average distal (AD) apical-crestal distances were calculated. In cases in which either the AM or the AD of the implant was below 4 mm, the specimens were placed in the AMD– group; when both the AM and the AD were greater than 4 mm, the specimens were placed in the AMD+ group. The lower values were used for both groups. Resonance frequency analysis measurements were taken in the mesiodistal direction at 6 weeks. The correlations between the mean RFAs and the means of the distances were examined using Spearman's or Pearson's correlation tests, depending on the distributions of the data.


The mean and SD of the AD group was 3.99 ± 3.19. The mean and SD of the AM group was 3.80 ± 2.67. The mean and SD of the AD– group was 2.72 ± 0.89. The mean and SD of the AD+ group was 6.34 ± 2.94. The mean and SD of the RFAs at 6 weeks was 77.82 ± 5.24, and for the AMD– and AMD+ groups, these measures were 78 ± 5.55 and 77.64 ± 5.36, respectively. None of the correlations between the RFAs and any of the distances were significant: AD (r = 0.114; Pearson's test, p < 0.05), AM (r = – 0.217; Spearman's test p < 0.05), AMD– (r = 0.248; Pearson's test, p < 0.05), and AMD+ (r = 0.3; Spearman's test, p < 0.05).


Within the limitations of this study, no correlations between the RFA readings and the implant-tooth distances were found at any level or distance.

How to cite this article

Aljuboori MJ, Filho LCM, Al-Obaidi FS, Al-Wakeel HA, Al-Marzok MI. What is the Effect of Implant-tooth Distance on Resonance Frequency Analysis Measurements? Int J Experiment Dent Sci 2015;4(2):124-129.

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