Purpose: This study used finite element analysis and a clinical case example to support a hypothesis that a wing-thread placed 4 mm below the top of the implant would decrease crestal bone loss in function.
Materials and methods: A finite element analysis was done comparing a straight and winged implant using axial and off-axis forces based on a hypothesis that decreasing bone strain at the alveolar crestal margin influences periimplant bone stability. A clinical case example of the wing-thread implant is followed for 30 months.
Results: Stress concentration was diminished at the crest when a wing-thread was used compared to a straight implant body. 90 degree lateral forces were diminished by a factor of ten in the wing-thread implant. A case report with 30 months follow-up showed stable bone levels around the implants.
Conclusion: A wing-thread hypothesis appears to have some support for increasing bode stability based on finite element analysis.