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2016
Journal Article
Titel
The impact of force transmission on narrow-body dental implants made of commercially pure titanium and titanium zirconia alloy with a conical implant-abutment connection: An experimental pilot study
Abstract
Purpose: The purpose of the present study was to visualize the mode and impact of force transmission in narrow diameter implants with different implant-abutment designs and material properties and to quantify the displacement of the abutment. Material and methods: Narrow diameter implants of two manufacturers were examined: Astra 3.0 mm (n=2) diameter implants (Astra OsseoSpeed TX, Dentsply, Germany) and Straumann BoneLevel implants with a 3.3 mm diameter made of cpTi Gr.4 (n=2) and 3.3 mm TiZr-alloy (n=2) (BoneLevel, Straumann, Switzerland) under incremental force application using synchrotron radiography (absorption and inline xray phase-contrast) and tomography. Results: Astra 3.0 and BoneLevel 3.3 mm implants showed during loading (250 N) a deformation of the outer implant shoulder of 61.75 to 95 mm independent of the implant body material. The inner implant diameter showed during loading (250 N) a deformation of 71.25 - 109.25 mm. A deformation of the implant shoulder persisted after the removal of the load (range 42.75 - 104.5 mm). An angulated intrusion of the abutment (max. 140 mm) into the implant body during load application was demonstrated, this spatial displacement persisted after removal of the load. Conclusion: The present study demonstrated a deformation of the implant shoulder and displacement of the abutment during load application in narrow diameter implants.
Author(s)