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Purpose <p>Limited research has investigated how implant neck flute design influences early peri-implant osteogenesis and implant stability in vivo. This study evaluated the effects of different neck flute designs on peri-implant bone healing and osseointegration in rat tibiae.</p> Methods <p>Three types of custom-made implants (13&#xa0;mm total length, 8&#xa0;mm screw part, 2&#xa0;mm diameter) were used: Type A (4 coronal flutes, 1.50&#xa0;mm length, 0.2&#xa0;mm notch radius, 0.20&#xa0;mm depth), Type B (4 coronal flutes, 1.50&#xa0;mm length, 0.5&#xa0;mm notch radius, 0.20&#xa0;mm depth), and Type C (no coronal flutes). The implants were bilaterally inserted into the tibiae of 21 male Wistar rats. After 4 weeks of healing, removal torque testing, micro-computed tomography, histological, and histomorphometric assessments were performed to evaluate osseointegration and the quality and quantity of the peri-implant bone. The assessments included the relative gray value (RGV; water = 0, implant = 100), bone-to-implant contact (BIC), and peri-implant bone volume/tissue volume (BV/TV).</p> Results <p>Removal torque tests demonstrated significant differences among implant types, with Type A and Type B implants exhibiting higher values than Type C. The RGV revealed no significant differences among groups. Histomorphometric analysis revealed no significant differences among groups.</p> Conclusion <p>The coronal flute design was associated with improved implant stability and osseointegration compared to non-fluted implants. This suggests that neck flute designs may enhance early peri-implant osseointegration and stability.</p>

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Effects of coronal implant neck flutes on early peri-implant osteogenesis and stability

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月17日

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  • Ziqi Xie,
  • Toru Ogawa,
  • Kenta Shobara,
  • Nobuhiro Yoda

摘要

Purpose

Limited research has investigated how implant neck flute design influences early peri-implant osteogenesis and implant stability in vivo. This study evaluated the effects of different neck flute designs on peri-implant bone healing and osseointegration in rat tibiae.

Methods

Three types of custom-made implants (13 mm total length, 8 mm screw part, 2 mm diameter) were used: Type A (4 coronal flutes, 1.50 mm length, 0.2 mm notch radius, 0.20 mm depth), Type B (4 coronal flutes, 1.50 mm length, 0.5 mm notch radius, 0.20 mm depth), and Type C (no coronal flutes). The implants were bilaterally inserted into the tibiae of 21 male Wistar rats. After 4 weeks of healing, removal torque testing, micro-computed tomography, histological, and histomorphometric assessments were performed to evaluate osseointegration and the quality and quantity of the peri-implant bone. The assessments included the relative gray value (RGV; water = 0, implant = 100), bone-to-implant contact (BIC), and peri-implant bone volume/tissue volume (BV/TV).

Results

Removal torque tests demonstrated significant differences among implant types, with Type A and Type B implants exhibiting higher values than Type C. The RGV revealed no significant differences among groups. Histomorphometric analysis revealed no significant differences among groups.

Conclusion

The coronal flute design was associated with improved implant stability and osseointegration compared to non-fluted implants. This suggests that neck flute designs may enhance early peri-implant osseointegration and stability.