J Dent Rehabil Appl Sci.  2018 Jun;34(2):80-88. 10.14368/jdras.2018.34.2.80.

Evaluation of the stability of sandblasted, large-grit, acid-etched implants with tapered straight body design

• Kim YG
• Lee KB

• KMID: 2422649
• DOI: http://doi.org/10.14368/jdras.2018.34.2.80

Abstract

PURPOSE
Implant surface modification and implant design are the principle targets for achieving successful primary stability. The aim of this study was to measure implant stability quotient (ISQ) values of sandblasted, large-grit, acid-etched (SLA) implants with tapered straight body design during the healing period, and to determine the various factors affecting implant stability.
MATERIALS AND METHODS
To measure implant stability, resonance frequency analysis (RFA) was performed in 26 patients (13 women and 13 men) with 44 SLA implants with tapered straight body design. Implant stability (ISQ values) was evaluated at baseline and healing abutment connection (12 weeks), and the correlations between RFA and insertion torque (IT), bone quality, and jawbone were determined.
RESULTS
The mean ISQ value of the implants was 69.4 ± 10.2 at the time of implant placement (baseline) and 81.4 ± 6.9 at the time of healing abutment connection (P < 0.05). Significant differences were found between RFA and bone quality and between RFA and jawbone (P < 0.05). No significant differences were found between RFA and IT, insertion area, fixture diameter, and implant length (P > 0.05).
CONCLUSION
ISQ values of SLA implants with tapered straight body design were high at baseline and healing abutment connection. It was concluded that SLA implants with tapered straight body design show improved primary and secondary stability, and that immediate or early loading may be applicable.

Keyword

RFA (Resonance frequency analysis); ISQ (Implant Stability Quotient); SLA (Sandblasted, Large-grit, Acid-etched) implant

MeSH Terms

Female
Humans
Torque

Figure

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  Fig 1 (A) Resonance frequency analyzer (Osstell Mentor®), (B) Wireless transducer (Smartpeg™, Integration Diagnostics AB, Göteborg, Sweden) connected to the implant.

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  Fig. 2 Radiograph obtained soon after implant fixture installation (A) and final prosthesis setting (B).

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  Fig. 3 Implant stability changes over time (first OP: week 0, second OP: week 12).

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  Fig. 4 Mean ISQ values for different variables I (immediately after implant, first OP). (A) Bone quality, (B) Jawbone, (C) IT, (D) Insertion area. Significant positive correlations were found between RFA and bone quality and between RFA and jawbone (*P < 0.05). No significant correlations were found between RFA, IT, and insertion area (P > 0.05).

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  Fig. 5 Mean ISQ values for different variables II. (A) Fixture diameter, (B) Implant length. No significant correlations were found between RFA and fixture diameter or between RFA and implant length (P > 0.05).

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  Fig. 6 Implant stability changes over time. (A) IT, * correlation between the mean ISQ values of the first and second OP at an IT of 25 Ncm; † correlation between mean ISQ values of the first and second OP at an IT of 30 Ncm. (B) Bone quality, * correlation between the mean ISQ values of the first and second OP on type II bone; † correlation between the mean ISQ values of the first and second OP on type III bone; ‡‡ Significantly different ISQ values between type II and type III bone at the second OP. (C) Jawbone, * correlation between the mean ISQ values of the first and second OP in the maxilla (P < 0.05); † correlation between the mean ISQ values of the first and second OP in the mandible (P < 0.05); ‡‡ correlation between the mean ISQ values of the maxilla and mandible at the second OP (P < 0.05).

Reference

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