Abstract: An electrode assembly that may be applied for use with medical devices. The electrode assembly includes an elongate first electrode and an elongate second electrode, each having interior cavities. The second electrode extends from a proximal end of the electrode assembly to a first distance from the distal end of the electrode assembly. The first electrode is slidably disposed within an interior cavity of the second electrode. The electrode assembly includes a tip coupled to a distal end of the first electrode. A maximum lateral or radial dimension of the tip is greater than a maximum lateral or radial dimension of the interior cavity of the second electrode to prevent the distal end of the first electrode from sliding into the interior cavity of the second electrode proximally beyond the open distal end of the second electrode.

Abstract: A surgical tool for ablating anatomical tissue according to at least one embodiment of the present disclosure includes: a distal tip; a first cylindrical tube connected to the distal tip; a second cylindrical tube that at least partially overlaps the first cylindrical tube in a first direction; and a J-shaped stylet disposed in an interior of the surgical tool, the J-shaped stylet capable of being removed from the interior of the surgical tool.

Abstract: A surgical tool for ablating anatomical tissue according to at least one embodiment of the present disclose includes: a distal tip; a first cylindrical tube connected to the distal tip; a second cylindrical tube that at least partially overlaps the first cylindrical tube in a first direction; and a J-shaped stylet disposed in an interior of the surgical tool, the J-shaped stylet capable of being removed from the interior of the surgical tool.

Abstract: A patient-specific alignment guide includes a patient-specific portion and a guiding element having a through opening. The patient-specific portion has a patient-specific surface preoperatively configured to mate as a negative of a portion of an iliac crest of a pelvis of a specific patient and mate to the iliac crest only in one position. The guiding element has a preoperatively configured orientation and location relative to the patient-specific portion for preparing a bore in the bone of the patient to direct a bone screw at the preoperatively configured orientation and location for sacroiliac fixation.

Abstract: A patient-specific alignment guide includes a patient-specific portion and a guiding element having a through opening. The patient-specific portion has a patient-specific surface preoperatively configured to mate as a negative of a portion of an iliac crest of a pelvis of a specific patient and mate to the iliac crest only in one position. The guiding element has a preoperatively configured orientation and location relative to the patient-specific portion for preparing a bore in the bone of the patient to direct a bone screw at the preoperatively configured orientation and location for sacroiliac fixation.

Abstract: A patient-specific alignment guide includes a patient-specific portion and a guiding element having a through opening. The patient-specific portion has a patient-specific surface preoperatively configured to mate as a negative of a portion of an iliac crest of a pelvis of a specific patient and mate to the iliac crest only in one position. The guiding element has a preoperatively configured orientation and location relative to the patient-specific portion for preparing a bore in the bone of the patient to direct a bone screw at the preoperatively configured orientation and location for sacroiliac fixation.

Abstract: A patient-specific alignment guide includes a patient-specific portion and a guiding element having a through opening. The patient-specific portion has a patient-specific surface preoperatively configured to mate as a negative of a portion of an iliac crest of a pelvis of a specific patient and mate to the iliac crest only in one position. The guiding element has a preoperatively configured orientation and location relative to the patient-specific portion for preparing a bore in the bone of the patient to direct a bone screw at the preoperatively configured orientation and location for sacroiliac fixation.

Abstract: A patient-specific alignment guide includes a patient-specific portion and a guiding element having a through opening. The patient-specific portion has a patient-specific surface preoperatively configured to mate as a negative of a portion of an iliac crest of a pelvis of a specific patient and mate to the iliac crest only in one position. The guiding element has a preoperatively configured orientation and location relative to the patient-specific portion for preparing a bore in the bone of the patient to direct a bone screw at the preoperatively configured orientation and location for sacroiliac fixation.

Abstract: A patient-specific alignment guide includes a patient-specific portion and a guiding element having a through opening. The patient-specific portion has a patient-specific surface preoperatively configured to mate as a negative of a portion of an iliac crest of a pelvis of a specific patient and mate to the iliac crest only in one position. The guiding element has a preoperatively configured orientation and location relative to the patient-specific portion for preparing a bore in the bone of the patient to direct a bone screw at the preoperatively configured orientation and location for sacroiliac fixation.

Abstract: A rod removal instrument for removing a rod from the seat of a vertebral anchor is disclosed. The rod removal instrument comprises an outer shaft connected to an inner shaft. The outer shaft has a rod receiving portion at its distal end. When placed in juxtaposition with the rod, the rod removal instrument is rotated to hook the rod into the rod receiving portion. The inner shaft is then moved distally with respect to the outer shaft to dislodge the rod from the seat and capture it in the rod removal instrument for removal from the surgical site.

Abstract: An inserter for implanting a spinal implant such as an intervertebral spacer into a spinal disc space is disclosed. The inserter comprises a jaw assembly connected to a shaft assembly that is connected to a handle assembly. The user operates the handle assembly to open and close the jaw assembly to thereby connect to and release from the implant. Furthermore, the handle assembly is operable to lock and unlock rotation of the jaw assembly while still connected thereto to permit angulation of the jaw assembly relative to the shaft assembly without losing hold of the implant.

Abstract: An inserter for implanting a spinal implant such as an intervertebral spacer into a spinal disc space is disclosed. The inserter comprises a jaw assembly connected to a shaft assembly that is connected to a handle assembly. The shaft assembly includes an angled portion in which the distal end of the instrument is displaced from the proximal end of the instrument affording the clinician a more unobstructed view of the operative site. The user operates the handle assembly at the proximal end to open and close the jaw assembly to thereby connect to and release from the intervertebral spacer.

Abstract: A dynamic device for implantation within a disc space between two adjacent vertebral bodies is disclosed. The device comprises two or more bodies interconnected via at least one connecting means such that at least one body is permitted relative motion with respect to the at least one other body. The device is configured to assume various configurations including a first configuration suitable for minimally invasive insertion and a second configuration suitable for residence within the disc space. Associated variations and insertion instruments are also disclosed.