Multipoint angled fixation implants for multiple screws and related methods

A bone anchor assembly, comprising:

• a bone anchor;
• a receiver member coupled to a proximal end of the bone anchor and defining a recess configured to receive a rod;
• a closure mechanism mated to the receiver member;
• a wing having a proximal portion disposed proximal to the receiver member, a distal portion that defines a plurality of auxiliary screw openings, each of the plurality of auxiliary screw openings configured to receive an auxiliary bone anchor screw therein, and a spanning portion that connects the proximal and distal portions;
• and
• a nut configured to engage the closure mechanism to secure the proximal portion of the wing to the proximal end of the receiver member,
• wherein the plurality of auxiliary screw openings extend at an angled trajectory relative to a proximal-distal axis of the spanning portion to define a specified trajectory of insertion of the auxiliary screw such that in a first configuration each auxiliary screw received in each of the plurality of screw openings can conform to a vertebral level in which the bone anchor is inserted, and in a second configuration at least one of the plurality of auxiliary bone anchor screws received in at least one of the screw openings can extend across a facet plane of the vertebral level in which the bone anchor is inserted.