The stability of Three-thread-design dental implants during the healing period. A clinical study using resonance frequency analysis method
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Abstract
Dental implants have shown a high success rate for rehabilitation of edentulous patients if certain conditions are met during treatment. Primary implant stability is the main factor in the success of osseointegration. Secondary implant stability is gained by osseointegration during the healing period. The purposes of this study were to examine the primary stability of three-thread-design dental implants and to monitor the stability of dental implants during a three-month period using the resonance frequency analysis (RFA) method. Twelve patients received 16 dental implants (PW Plus, Nakhon Pathom, Thailand). The dental implants were placed in the posterior mandibular edentulous area. At implant placement and after 1, 2, 3, 4, 6, 8, 10 and 12 weeks, RFA assessments were performed. The results showed that the mean primary implant stability quotient (ISQ) value was 77.2±0.93 and there was a statistical decrease in the mean ISQ values at the first week (P < 0.05). After that, the mean ISQ values constantly increased in the following weeks. However, the dental implants showed high stability over the three-month period (ISQ ≥ 65). Within the limitations of this study, our results show that the three-thread-design implant reveals high stability throughout the healing period.
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