A bone plate fixation system, comprising: a plurality of bone screws each including a screw head and a threaded shank extending from said screw head and adapted for anchoring within bone; and a bone plate extending along a longitudinal axis and having a plate body including an elongate shaft portion and a triangular-shaped head portion extending from said elongate shaft portion; wherein said plate body includes a number of bone screw openings extending therethrough and each having an inner surface, wherein said elongate shaft portion of said plate body includes a first plurality of said bone screw openings and a first elongate slot having a slot length extending generally parallel with said longitudinal axis; and wherein said triangular-shaped head portion of said plate body includes a second plurality of said bone screw openings and a second elongate slot having a slot length extending generally parallel with said longitudinal axis, said triangular-shaped head portion further including an elongate visualization window extending therethrough and having a window length extending in a direction transverse to said longitudinal axis; characterised in that: said bone screw openings each having a plurality of flexible fins integrally connected to and protruding radial inward from said inner surface, wherein said plurality of flexible fins are deflectable by said screw head of one of said bone screws inserted into a corresponding one of said bone screw openings to retain said one of said bone screws in said corresponding one of said bone screw openings relative to said plate body; and said elongate visualization window in said triangular-shaped head portion of said plate body has a trapezoidal shape; wherein said elongate visualization window is defined by a pair of substantially parallel bases (66a, 66b) extending along said window length, and a pair of non-parallel legs (66c, 66d) that extend substantially parallel with corresponding peripheral side surfaces (37a, 37b) defined by said triangular-shaped head portion of said plate body. a plurality of bone screws each including a screw head and a threaded shank extending from said screw head and adapted for anchoring within bone; and a bone plate extending along a longitudinal axis and having a plate body including an elongate shaft portion and a triangular-shaped head portion extending from said elongate shaft portion; wherein said plate body includes a number of bone screw openings extending therethrough and each having an inner surface, wherein said elongate shaft portion of said plate body includes a first plurality of said bone screw openings and a first elongate slot having a slot length extending generally parallel with said longitudinal axis; and wherein said triangular-shaped head portion of said plate body includes a second plurality of said bone screw openings and a second elongate slot having a slot length extending generally parallel with said longitudinal axis, said triangular-shaped head portion further including an elongate visualization window extending therethrough and having a window length extending in a direction transverse to said longitudinal axis; characterised in that: said bone screw openings each having a plurality of flexible fins integrally connected to and protruding radial inward from said inner surface, wherein said plurality of flexible fins are deflectable by said screw head of one of said bone screws inserted into a corresponding one of said bone screw openings to retain said one of said bone screws in said corresponding one of said bone screw openings relative to said plate body; and said elongate visualization window in said triangular-shaped head portion of said plate body has a trapezoidal shape; wherein said elongate visualization window is defined by a pair of substantially parallel bases (66a, 66b) extending along said window length, and a pair of non-parallel legs (66c, 66d) that extend substantially parallel with corresponding peripheral side surfaces (37a, 37b) defined by said triangular-shaped head portion of said plate body. said bone screw openings each having a plurality of flexible fins integrally connected to and protruding radial inward from said inner surface, wherein said plurality of flexible fins are deflectable by said screw head of one of said bone screws inserted into a corresponding one of said bone screw openings to retain said one of said bone screws in said corresponding one of said bone screw openings relative to said plate body; and said elongate visualization window in said triangular-shaped head portion of said plate body has a trapezoidal shape; wherein said elongate visualization window is defined by a pair of substantially parallel bases (66a, 66b) extending along said window length, and a pair of non-parallel legs (66c, 66d) that extend substantially parallel with corresponding peripheral side surfaces (37a, 37b) defined by said triangular-shaped head portion of said plate body.