Ultrasound device and ultrasound device system used for anchor fixation and anchor fixation method using ultrasound device

An ultrasound device system comprising:

• an ultrasound device configured to form a recessed part in a bone with ultrasound oscillation;
• an anchor that is configured to be fixed in the recessed part of the bone;
• and
• an anchor fixing tool that includes a retaining part configured to retain the anchor and the anchor fixing tool is configured to rotate and fix the anchor in the recessed part formed in the bone, wherein:
• the ultrasound device includes:
• an ultrasound generator configured to generate the ultrasound oscillation;
• a probe having a proximal end and a distal end, the ultrasound oscillation being propagated from the ultrasound generator to the proximal end, the ultrasound oscillation being propagated through oscillation toward the distal end in a longitudinal direction of the probe;
• and
• a treatment portion that is provided at the distal end, the treatment portion being configured to form the recessed part of the bone;
• a cross-sectional surface of the probe at the distal end that is perpendicular to the longitudinal direction, the cross-sectional surface having a shape identical to a shape of a cross-sectional surface of the anchor, the probe being configured to form a bottomed hole in the bone for placing the anchor;
• an area of the cross-sectional surface of the probe at the distal end is larger than an area of a cross-sectional surface of the probe at the proximal end, and
• the treatment portion of the ultrasound device extends outward relative to the proximal end and is formed in a first direction perpendicular to the longitudinal direction and in a second direction different from the first direction.

An anchor fixation method using an ultrasound device, the method comprising:

• pressing a distal end of an elongated probe against a bone;
• oscillating the probe with ultrasound waves and propagating oscillation of the ultrasound waves toward the distal end of the probe along the longitudinal direction;
• crushing the bone with a surface of the probe in contact with the bone and forming a hole entrance;
• and
• forming a bottomed hole in the bone by rotating the probe to a predetermined depth in the bone, the bottomed hole having a surface with a shape identical to a shape of a cross-sectional surface of an anchor to place and prevent rotation of the anchor in the bottomed hole;
• wherein:
• the probe has a proximal end on an opposite side of the distal end, an area of a cross-sectional surface of the probe at the distal end is larger than an area of a cross-sectional surface of the probe at the proximal end, and the probe has a cuboidal shape that extends from a center of the proximal end;
• and
• an area of a bottom surface of the bottomed hole is larger than an area of the hole entrance.