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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

: Nelson, Katja; Schmelzeisen, Rainer; Fretwurst, Tobias; Taylor, Thomas D.; Zabler, Simon; Wiest, Wolfram


International journal of oral and maxillofacial implants 31 (2016), Nr.5, S.1066-1071
ISSN: 0882-2786
ISSN: 1942-4434
Fraunhofer IIS ()
Werkstoffprüfung; Röntgendetektoren; Rekonstruktion / Algorithmik; Prüfsystem; Normen f.d. Medizintechnik; medizinische BV; Kantendetektion; industrielle BV; dimensionales Messen; Defekterkennung; CT-Metrologie; Computer-Tomografie (CT); Bewegungserfassung; automatische ZfP; 3D Bildverarbeitung; 3D; 2D

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 μm independent of the implant body material. The inner implant diameter showed during loading (250 N) a deformation of 71.25 - 109.25 μm. A deformation of the implant shoulder persisted after the removal of the load (range 42.75 - 104.5 μm). An angulated intrusion of the abutment (max. 140 μm) 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.