Abstract: An ultrasonic surgical system includes an ultrasonic transducer, a probe, and at least one circuit. The ultrasonic transducer is designed to ultrasonically vibrate. The probe is coupled to the ultrasonic transducer and is designed to treat a living tissue by the ultrasonic vibration. The circuit performs functions including detecting a pressing force of the probe against the living tissue, calculating a value of a product of the pressing force, an amplitude of the ultrasonic vibration, and a resonance frequency of the probe, comparing the calculated value with a predetermined product value, and generating a predetermined signal based on a result of the comparison.

Abstract: An arthroscopic surgery method for ankle ligament reconstruction of this embodiment is removed using an ultrasonic treatment tool, blowing away a synovial membrane, and secures the view for a remnant ligament. Then, bone holes are produced to a fibula, a talus and a calcaneus using the ultrasonic treatment tool.

Abstract: A ligament fixation method can include forming a bone tunnel to a predetermined depth from a surface of a bone; mounting a reconstruction ligament to the ligament fixation device. The reconstruction ligament can be disposed along outer surfaces of plate-like pressing segments of a ligament fixation device and an outer surface of a connection segment that connects the pressing segments. The method can also include inserting the ligament fixation device into the bone tunnel from the connection-segment side; fastening a screw to a receiving section of the ligament fixation device from an opening of the ligament fixation device to increase a distance between the pair of pressing segments and to compress the reconstruction ligament between each pressing segment and an inner surface of the bone tunnel; and fixing the reconstruction ligament to the bone by causing a part of the screw to dig into the bone.

Abstract: An arthroscopic surgery method for ankle ligament reconstruction of this embodiment is removed using an ultrasonic treatment tool, blowing away a synovial membrane, and secures the view for a remnant ligament. Then, bone holes are produced to a fibula, a talus and a calcaneus using the ultrasonic treatment tool.

Abstract: A probe unit includes, a probe configured to treat a bone by ultrasonic vibration, a hollow sheath which surrounds the probe and which has a first portion at a small distance from a central axis, and a second portion at a greater distance from the central axis than the first portion, and a knob configured to rotate the sheath relative to the probe between a first position for insertion between the bone and a living tissue facing the bone so that the first portion is located between the bone and the living tissue and a second position for insertion between the bone and the living tissue so that the second portion is located between the bone and the living tissue.

Abstract: A treatment method is a treatment method for cutting cartilage of a human body by an ultrasonic device including a cutting section that ultrasonically vibrates. The treatment method includes cutting the cartilage with a product of an amplitude of the cutting section and a pressing force for pressing the cutting section against the cartilage being 100 (N·?m) or larger.

Abstract: A method for revision arthroplasty of an embodiment is detaching an existing femur component of an artificial joint from a femur, the existing femur component being fixed by cement, and the artificial joint being composed of the existing femur component and an acetabulum component; breaking and removing the cement and bone remaining in an attaching of the femur from which the existing femur component was detached, by transmitting ultrasonic vibration to a treating section provided at a probe distal end of an ultrasonic treatment device when the treating section is brought into contact with the cement and the bone, and regenerating an attaching hole for a new femur component; applying cement in the regenerated attaching hole; and attaching and fixing a new femur component in the regenerated attaching hole.

Abstract: An ultrasonic surgical system includes an ultrasonic transducer, a probe, and at least one circuit. The ultrasonic transducer is designed to ultrasonically vibrate. The probe is coupled to the ultrasonic transducer and is designed to treat a living tissue by the ultrasonic vibration. The circuit performs functions including detecting a pressing force of the probe against the living tissue, calculating a value of a product of the pressing force, an amplitude of the ultrasonic vibration, and a resonance frequency of the probe, comparing the calculated value with a predetermined product value, and generating a predetermined signal based on a result of the comparison.

Abstract: A surgical procedure of preparing bone holes to fix an implanted tendon to a femur when performing reconstruction of a ligament in a knee joint, includes: bringing a treatment portion of an ultrasonic treatment instrument into contact with the femur in the knee joint, and applying ultrasonic vibration from the treatment portion to the femur, thereby cutting and forming a first bone hole from the inside of the knee joint to the femur in a predetermined depth.

Abstract: An arthroscopic surgery method for ankle ligament reconstruction of this embodiment is removed using an ultrasonic treatment tool, blowing away a synovial membrane, and secures the view for a remnant ligament. Then, bone holes are produced to a fibula, a talus and a calcaneus using the ultrasonic treatment tool.

Abstract: An arthroscopic surgery method for ankle impingement of the embodiment removes a posterior process of talus from the portal formed in the position specified beforehand by vibrating ultrasonically of an ultrasonic treatment tool which inserted and inserted the ultrasonic treatment tool to the posterior process of talus and a tendon sheath of flexor hallucis longus muscle tendon, and deletes the tendon sheath of flexor hallucis longus muscle tendon by the ultrasonic treatment tool used for deleting the posterior process of talus.

Abstract: An arthroscopic surgery method for ankle ligament reconstruction of this embodiment is removed using an ultrasonic treatment tool, blowing away a synovial membrane, and secures the view for a remnant ligament. Then, bone holes are produced to a fibula, a talus and a calcaneus using the ultrasonic treatment tool.

Abstract: A treatment method which treats a living tissue using an ultrasonic device includes making the ultrasonic device come in contact with the living tissue in a state where the product of a pressing force of the ultrasonic device to the living tissue, an amplitude of an ultrasonic vibration caused by the ultrasonic device, and a resonance frequency of the ultrasonic device becomes a predetermined value, and excising the living tissue in a state where the ultrasonic device is in contact with the living tissue.

Abstract: An arthroscopical surgical method including administering a fluorescent chemical agent into a joint, which is a treatment target, allowing the fluorescent chemical agent to be adsorbed by a degenerated region that has degenerated from a normal region in a cartilage inside the joint, which is the treatment target, displaying and observing an emission of fluorescence from the degenerated region, which has adsorbed the fluorescent chemical agent, by infrared excitation light on a display through an arthroscope, and allowing a surgeon to recognize the degenerated region in the cartilage inside the joint, which is the treatment target.

Abstract: In an arthroendoscopical surgical method, a resection target area, and a freshening treatment area which becomes repair surfaces with bleeding, are identified, and a resection line and a freshening line are drawn on a tear site in a meniscus, which is emphasized by fluorescence with use of a fluorescent medicine under excitation light. Using an ultrasonic treatment tool and an arthroscope, the resection target area is resected by a probe which generates ultrasonic vibrations, based on the resection line and freshening line under visible-light illumination. Thus, an inclined resection surface is formed, and planar repair surfaces with bleeding are joined and repaired.

Abstract: An arthroscopical surgical method using an ultrasonic treatment device for a joint includes: transmitting ultrasonic vibration to a treatment portion of the ultrasonic treatment device, removing an injured region of an articular cartilage so that a subchondral bone is exposed, and forming a cartilage edge which is nearly angled at 90° with the exposed surface of the subchondral bone to form a pool-shaped depression; forming a hole which pierces up to a cancellous bone of the subchondral bone through the depression, and scratching blood vessels in the cancellous bone; causing bleeding from the blood vessels so that blood is retained in the depression via the hole.

Abstract: A joint surgical treatment under an arthroscope, includes: excising a treatment object of a synovial membrane, by transmitting an ultrasonic vibration to a treating portion of an ultrasonic device in a state where the treating portion is in contact with the treatment object of the synovial membrane; facing the treating portion to a treatment object of a cartilage, the treating portion being used in excising the treatment object of the synovial membrane; and removing the treatment object of the cartilage, by contacting the treating portion with the treatment object of the cartilage, and by transmitting the ultrasonic vibration to the treating portion in a state where the treating portion is in contact with the treatment object of the cartilage.

Abstract: A knee joint surgical treatment under an arthroscope includes: contacting a treating portion of an ultrasonic device with an end region to which an ACL or a PCL of a tibia adheres and with a start region to which the ACL or the PCL of a femur adheres, excising the tibia and a remaining ligament of the ACL, or the tibia and a remaining ligament of the PCL, excising the femur and a remaining ligament of the ACL, or the femur and a remaining ligament of the PCL by ultrasonically vibrating the treating portion, thereby exposing footprints of the tibia and the femur; and forming tunnels between the footprint of the tibia and a medial side of a rough surface of the tibia and between the footprint of the femur and an lateral surface of a lateral condyle of the femur.

Abstract: A surgical treatment of an ACL or a PCL of a knee joint under an arthroscope, includes: contacting a treating portion of an ultrasonic device with a start region to which the ACL or the PCL of a femur adheres, and excising the femur and a remaining ligament of the ACL, or the femur and a remaining ligament of the PCL by ultrasonically vibrating the treating portion, thereby exposing a footprint of the femur; and contacting the treating portion with an end region to which the ACL or the PCL of a tibia adheres, and excising the tibia and a remaining ligament of the ACL, or the tibia and a remaining ligament of the PCL by ultrasonically vibrating the treating portion, thereby exposing a footprint of the tibia.

Abstract: A joint surgical treatment includes bringing a treating portion of an ultrasonic device into contact with a damaged region of a cartilage that is a treated object region in the joint, and transmitting an ultrasonic vibration to the treating portion in contact with the treated object region while observing the treated object region with the arthroscope to remove the treated object region of the cartilage. The ultrasonic vibration is used to remove the treated object so as to smoothly continue a removed surface from which the treated object region is removed and a non-removed surface adjacent to the removed surface without forming any corners between the surfaces in the cartilage.