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Animal experiment: Surface wear analysis1455difference in the amount of linear, nor volumetric wear, was seen between both groups of fossa. Fig. 6: 3D scans of explanted fossa component of the custom temporomandibular joint total joint replacement after 9 months of mastication and rumination in a sheep model with deviant wear patterns. (A) Ultra-high molecular weight polyethylene (UHMWPE) fossa of sheep #2177 that articulated with a non-coated condyle. Black arro worn out UHMWPE due to articulating with the condylar surface, with uneven edges. (B) UHMWPE fossa of sheep #4246 that articulated with an H-DLC coated condyle. Black arro main worn out UHMWPE volume due to articulating with the condylar surface. Orange arro posteriorly orientated UHMWPE wear track. (C) UHMWPE fossa of sheep #8087 that articulated with an H-DLC coated condyle. Black arro main worn out UHMWPE volume due to articulating with the condylar surface. Orange arro three additional condylar-shaped UHMWPE wear tracks. Red arro UHMWPE creep deformation, in nonarticulating region. (D) UHMWPE fossa of sheep #7998 that articulated with a non-coated condyle. Black arro main worn out UHMWPE volume due to articulating with the condylar surface. Orange arro initial, centered, UHMWPE wear volume due to articulating with the condylar surface. Red arro UHMWPE creep deformation, in non-articulating region.As already mentioned previously, due to not being able to determine the linear wear by means of 3D scanning for all the fossa, the amount of linear wear was determined by means of LLS. However, in one sample (ewe # 4473, Fig 4) no proper alignment of the explanted model and the STL file was possible and thus no (correct) measurement was possible. The average linear wear of the UHMWPE surface in contact with the non-coated condyle was 0.88 ± 0.41 mm, while for the UHMWPE surface in contact Nikolas de Meurechy NW.indd 145 05-06-2024 10:14