A surgical tissue shaver comprising: a shaft (200, 300, 600) extending from a proximal shaft end (202, 302) to a distal shaft end (204, 304), the shaft (200, 300, 600) comprising a tubular body defining a cannula (206, 306, 606) extending from the proximal shaft end (202, 302) to the distal shaft end (204, 304); and a cutter head (210, 310, 610, 710, 810, 910, 1010, 1110, 1210, 1310, 1410) at the distal shaft end (204, 304) and extending along a longitudinal axis, the cutter head (210, 310, 610, 710, 810, 910, 1010, 1110, 1210, 1310, 1410) having a cutter opening (612, 712, 812, 912, 1012, 1112, 1212, 1312, 1412) in fluid communication with the cannula (206, 306, 606), wherein at least a portion of the cutter opening (612, 712, 812, 912, 1012, 1112, 1212, 1312, 1412) extending along the longitudinal axis is defined between a first row of teeth (614, 714, 814, 914, 1014, 1114, 1214, 1314) and a second row of teeth (616, 716, 816, 916, 1016, 1116, 1216, 1316) opposite the first row of teeth (614, 714, 814, 914, 1014, 1114, 1214, 1314) with respect to the longitudinal axis; wherein a first tooth selected from the first row of teeth (614, 714, 814, 914, 1014, 1114, 1214, 1314) is defined by a respective proximal tooth surface (614a, 616a, 714a, 716a) and a respective distal tooth surface (614b, 616b, 714b, 716b) that intersect at a respective tooth edge (614c, 616c, 714c, 716c), and wherein the respective tooth edge (614c, 616c, 714c, 716c) of the first tooth is oriented at a first angle of less than 90° relative to the longitudinal axis; characterized in that a second tooth selected from the first row of teeth (614, 714, 814, 914, 1014, 1114, 1214, 1314) and the second row of teeth (616, 716, 816, 916, 1016, 1116, 1216, 1316) is defined by a respective proximal tooth surface (614a, 616a, 714a, 716a) and a respective distal tooth surface (614b, 616b, 714b, 716b) that intersect at a respective tooth edge (614c, 616c, 714c, 716c), and wherein the respective tooth edge (614c, 616c, 714c, 716c) of the second tooth is oriented at a second angle relative to the longitudinal axis, the second angle being different from the first angle. a shaft (200, 300, 600) extending from a proximal shaft end (202, 302) to a distal shaft end (204, 304), the shaft (200, 300, 600) comprising a tubular body defining a cannula (206, 306, 606) extending from the proximal shaft end (202, 302) to the distal shaft end (204, 304); and a cutter head (210, 310, 610, 710, 810, 910, 1010, 1110, 1210, 1310, 1410) at the distal shaft end (204, 304) and extending along a longitudinal axis, the cutter head (210, 310, 610, 710, 810, 910, 1010, 1110, 1210, 1310, 1410) having a cutter opening (612, 712, 812, 912, 1012, 1112, 1212, 1312, 1412) in fluid communication with the cannula (206, 306, 606), wherein at least a portion of the cutter opening (612, 712, 812, 912, 1012, 1112, 1212, 1312, 1412) extending along the longitudinal axis is defined between a first row of teeth (614, 714, 814, 914, 1014, 1114, 1214, 1314) and a second row of teeth (616, 716, 816, 916, 1016, 1116, 1216, 1316) opposite the first row of teeth (614, 714, 814, 914, 1014, 1114, 1214, 1314) with respect to the longitudinal axis; wherein a first tooth selected from the first row of teeth (614, 714, 814, 914, 1014, 1114, 1214, 1314) is defined by a respective proximal tooth surface (614a, 616a, 714a, 716a) and a respective distal tooth surface (614b, 616b, 714b, 716b) that intersect at a respective tooth edge (614c, 616c, 714c, 716c), and wherein the respective tooth edge (614c, 616c, 714c, 716c) of the first tooth is oriented at a first angle of less than 90° relative to the longitudinal axis; characterized in that a second tooth selected from the first row of teeth (614, 714, 814, 914, 1014, 1114, 1214, 1314) and the second row of teeth (616, 716, 816, 916, 1016, 1116, 1216, 1316) is defined by a respective proximal tooth surface (614a, 616a, 714a, 716a) and a respective distal tooth surface (614b, 616b, 714b, 716b) that intersect at a respective tooth edge (614c, 616c, 714c, 716c), and wherein the respective tooth edge (614c, 616c, 714c, 716c) of the second tooth is oriented at a second angle relative to the longitudinal axis, the second angle being different from the first angle.