Resonance Frequency Analysis of Dental Implants With 2 Types of Surface Treatment Submitted to Immediate Loading: A Prospective Clinical Study

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Characteristics of the implant surface may benefit osseointegration, and the knowledge of this process in diverse clinical situations may play a role in implant dentistry practice.


The aim of the present study was to compare the stability of dental implants with different types of surface treatment.

Materials and Methods:

Fifty-five implants were placed in the mandibles of 11 fully edentulous patients. Group 1 (G1) consisted of 27 implants with a hydrophilic surface. Group 2 (G2) consisted of 28 implants (double sandblasting and acid etching). Implants were distributed randomly; equal surfaces were not placed contiguously. Measurements were taken after surgery (baseline) and 10, 30, 60, and 90 days, 4 and 8 months after surgery. Resonance frequency analysis (RFA) was used for determining the stability.


No statistically significant differences were found. The largest difference in implant stability quotient (ISQ) between groups occurred at the first evaluation (ISQ ≈ 69.8 in G1 and ≈ 68.4 in G2). Reductions in stability were more accentuated in the first month, returning to values similar to baseline in the subsequent months, with peak stability reached at 8 months (ISQ ≈ 69.8 in G1 and ≈ 69.8 in G2).


No statistically significant differences were found in the stability of the implants placed in edentulous mandibular arch, submitted to immediate loading analyzed using RFA.

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