Page 155 - Demo

Animal experiment: Surface wear analysis1535Fig. 8: Scanning electron microscopy images of the coated condylar surfaces after explantation. A: Sheep #5158 Intact, smooth, condylar surface without significant damage (Magnification 500x) Red arro Superficial scratch with intact coating B: Sheep #5158 Intact, smooth, condylar surface without significant damage (Magnification 5000x) Red arro Superficial scratch with intact coating C: Sheep #2177 Damaged condylar surface (Magnification 500x) Red arro Deep abrasive wear, penetrating the condylar coating D: Sheep #2177 Damaged condylar surface (Magnification 5000x) Red arro Deep abrasive scratches penetrating the condylar coatingThis non-Gaussian distribution was due to the high Ra and Sa (6.59) that were measured for the condylar surface of ewe #8787. Despite the fossa being in its proper position, as well as the mandibular component, and although upon explantation no macroscopically visible third bodies were found inside the joint, the wear pattern on the condyle indicates third body abrasive wear occurred with the surface damage being mediolateral oriented. This is confirmational to the expected mastication pattern, as sheep mainly perform laterotrusive movements. Due to this increased surface roughness, a high amount of linear (1.35 mm) and volumetric wear Nikolas de Meurechy NW.indd 153 05-06-2024 10:14