Histological and immunohistochemical soft-tissue response to cylindrical and concave abutments: Multicenter randomized clinical trial.

Last, although the extension of the supracrestal connective tissue (aJE‐AM) was slightly greater around the concave abutments (1.11 ± 0.17 (range 0.90–1.60) than around the cylindrical abutments (1.03 ± 0.16 [range 0.70–1.50]), the difference failed to reach statistical significance ( p = 0.069). 3.2 Collagen fiber orientation Although the percentage of collagen fibers orientated longitudinally/parallel to the abutment was greater in both types of abutments (84.32 ± 4.57 for cylindrical abutments and 76.24 ± 5.86 for concave abutments), the percentage of fibers orientated tran

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