Resonance Frequency Analysis (RFA) during early healing

Huwiler, MA; Pjetursson, BE; Bosshardt, DD; Salvi, GE; Lang, NP (2006). Resonance Frequency Analysis (RFA) during early healing. In: Pan European Federation of IADR (PEF 2006). Dublin Ireland. September 13-16, 2006.

Objectives: - to monitor resonance frequency analysis (RFA) in relation to the jawbone characteristics during the early phases of healing and incorporation of Straumann® dental implants with an SLA surface. Material and methods: 17 Straumann 4.1mm implants (10mm) and 7 Straumann 4.8mm implants (10mm) were installed and ISQ determined at baseline and after 1, 2, 3, 4, 5, 6, 8 and 12 weeks. Central bone cores were analyzed from the 4.1mm implants using micro CT for bone volume density (BVD) and bone trabecular connectivity (BTC). Results: Pocket probing depths ranged between 2-4mm and bleeding on probing between 5-20%. At baseline, BVD varied between 24 and 65% and BTC between 4.9 and 25.4 for the 4.1mm implants. Baseline ISQ varied between 55 and 74 with a mean of 61.4. No significant correlations were found between BVD or BTC and ISQ Values. For the 4.8mm diameter implants baseline ISQ values ranged from 57 – 70 with a mean of 63.3. Over the healing period ISQ values increased at 1 week and decreased after 2-3 weeks. After 4 weeks ISQ values, again increased slightly, no significant differences were noted over time. One implant (4.1mm) lost stability at 3 weeks. Its ISQ value had dropped from 68 to 45. However the latter value was determined after the clinical diagnosis of instability. Conclusion: ISQ values of 57 – 70 represented homeostasis and implant stability. However no predictive value for loosing implant stability can be attributed to RFA since decease occurred after the fact.

Item Type:

Conference or Workshop Item (Abstract)


04 Faculty of Medicine > School of Dental Medicine > Department of Periodontology
04 Faculty of Medicine > School of Dental Medicine > Department of Oral Surgery and Stomatology

UniBE Contributor:

Huwiler, Melanie Bianca; Pjetursson, Bjarni E.; Bosshardt, Dieter; Salvi, Giovanni and Lang, Niklaus Peter




Eveline Carmen Schuler

Date Deposited:

04 Oct 2013 14:52

Last Modified:

25 Jan 2017 12:17

Additional Information:

Abstract Nr. 793

URI: (FactScience: 19594)

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