Abstract
In order to apply the “one-abutment–one-time” concept, we evaluated the possibility of measuring resonance frequency analysis (RFA) on the abutment. This trial aimed to compare the Implant Stability Quotient (ISQ) values obtained by the PenguinRFA when screwing the transducer onto the implant or onto abutments with different heights and angulations. Eighty implants (VEGA®, Klockner Implant System, SOADCO, Les Escaldes, Andorra) were inserted into fresh bovine ribs. The groups were composed of 20 implants, 12 mm in length, with two diameters (3.5 and 4 mm). Five different abutments for screwed retained restorations (Permanent®) were placed as follows: straight with 1, 2, and 3 mm heights, and angulated at 18° with 2 and 3 mm heights. The mean value of the ISQ measured directly on the implant was 75.72 ± 4.37. The mean value of the ISQ registered over straight abutments was 79.5 ± 8.50, 76.12 ± 6.63, and 71.42 ± 6.86 for 1, 2, and 3 mm height abutments. The mean ISQ over angled abutments of 2 and 3 mm heights were 68.74 ± 4.68 and 64.51 ± 4.53 respectively. The present study demonstrates that, when the ISQ is registered over the straight abutments of 2 and 3 mm heights, the values decrease, and values are lower for angled, 3 mm height abutments.
Highlights
Implant therapy has become the most important treatment for the replacement of missing teeth
The mean Implant Stability Quotient (ISQ) registered over straight abutments with a 1 mm height was 79.5 ± 8.50, that registered over straight abutments with a 2 mm height was 76.12 ± 6.63, and that registered over straight abutments with a 3 mm height was
The implant stability was analyzed by resonance frequency analysis (RFA) with the PenguinRFA system when the transducer was screwed onto the implant and subject to different abutments of various heights and angulations
Summary
Implant therapy has become the most important treatment for the replacement of missing teeth. One of the main factors to achieve osseointegration of dental implants is to have primary stability [1]. Primary stability is defined by the absence of mobility in the prepared bone site after implant insertion [2]. The maintenance of an appropriate stability through time seems to be a long-term success guarantee [3,4,5]. The clinician can improve their decision tree in daily practice by assessing implant stability over time [6]. The possibility of stability monitorization and quantification gives objective information on implant behavior during osseointegration [7]
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