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Implants and test specimen

FM Filippo Migliorini
AB Alice Baroncini
YM Yasser El Mansy
VQ Valentin Quack
AP Andreas Prescher
MM Max Mischer
JG Johannes Greven
MT Markus Tingart
JE Jörg Eschweiler
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For implant testing, 36 artificial occipital bones made of rigid polyurethane foams (Sawbone®, Pacific Research Laboratories Inc., Vashon, Washington, USA) that complied with the requirements ASTM F1839–08 [12] were used. Eighteen artificial bones were available for each of the two examined group. The two occipital implants (Fig. 1) (Medicon, occiput plate, made of Ti-6AI-4 V surgical alloy), namely the occipital plate with hook (Group 1) and the one without hook (Group 2), were applied to the artificial occiput trough three occipital screws. The implants were manufactured via milling without a special postprocessing. The implants were fixed by an experienced surgeon. Other than the presence of the hook, the plates were identical in shape and material. The construct consisting of artificial occiput, plate, screws and crossbar were ensured into the experimental setup trough a crossbar (Fig. ​(Fig.11).

Occipital plate (a: dorsal view; b: lateral view without hook; c: lateral view with hook; d: crossbar)

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