Abstract: An object of the present disclosure is to provide a surgical instrument that can facilitate adjustment between a progressive position gap and a flexed position gap by additionally resecting a bone after resection of a femur distal portion. A surgical instrument (1) includes a body portion (2) including a first abutment surface (5) abuttable against a distal end resection surface (102) of a femur distal portion (101) and a posterior condyle abutment portion (3) including a second abutment surface (10) abuttable against a posterior condyle resection surface (104) of a posterior condyle portion (103) of a femur (100) and connected to the body portion (2). The body portion (2) includes a first slit (7) extending in a direction parallel to the second abutment surface (10) and a second slit (8) extending in a direction intersecting the first abutment surface (5) and the second abutment surface (10).

Abstract: To stably maintain a fitting state to an opening portion by reducing a likelihood of displacement and detachment from the opening portion of a femoral trial. A cam module of the present disclosure includes a first connection portion disposed at a first end portion provided in a side wall portion and connectable to the femoral trial, and a second connection portion disposed at a second end portion provided in the side wall portion and connectable to the femoral trial.

Abstract: An object of the present disclosure is to provide a surgical instrument that can facilitate adjustment between a progressive position gap and a flexed position gap by additionally resecting a bone after resection of a femur distal portion. A surgical instrument (1) includes a body portion (2) including a first abutment surface (5) abuttable against a distal end resection surface (102) of a femur distal portion (101) and a posterior condyle abutment portion (3) including a second abutment surface (10) abuttable against a posterior condyle resection surface (104) of a posterior condyle portion (103) of a femur (100) and connected to the body portion (2). The body portion (2) includes a first slit (7) extending in a direction parallel to the second abutment surface (10) and a second slit (8) extending in a direction intersecting the first abutment surface (5) and the second abutment surface (10).

Abstract: The instrument for artificial knee joint replacement surgery includes a holding mechanism that includes a holding portion having a contact portion to be brought into contact with a contact target of a patient on whom artificial knee joint replacement surgery is to be performed and that holds the patient in a state in which the contact portion is in contact with the contact target, and an indicating mechanism that is attached to the holding mechanism and includes a position identification target indicating portion to be arranged at a position corresponding to a position identification target in a state in which the holding mechanism holds the patient. The position at which the position identification target indicating portion is to be arranged is determined based on a positional relationship between the contact target and the position identification target that is obtained in advance prior to surgery.

Abstract: Provided is a surgical assistance apparatus and so on that make it possible to more accurately check the state that an affected part is to be in after a surgical operation has started, in advance of the surgical operation. A surgical assistance apparatus includes an image processing unit. The image processing unit creates projection image data based on measurement data that has been obtained by measuring an affected part of a patient, and thus creates a projection image as an image that is specified by the projection image data. This projection image is an image that is to be projected onto the patient, and includes an image that shows a state that the affected part is to be in after a surgical operation has started.

Abstract: Provided is a surgical assistance apparatus and so on that make it possible to more accurately check the state that an affected part is to be in after a surgical operation has started, in advance of the surgical operation. A surgical assistance apparatus includes an image processing unit. The image processing unit creates projection image data based on measurement data that has been obtained by measuring an affected part of a patient, and thus creates a projection image as an image that is specified by the projection image data. This projection image is an image that is to be projected onto the patient, and includes an image that shows a state that the affected part is to be in after a surgical operation has started.

Abstract: The instrument for artificial knee joint replacement surgery includes a holding mechanism that includes a holding portion having a contact portion to be brought into contact with a contact target of a patient on whom artificial knee joint replacement surgery is to be performed and that holds the patient in a state in which the contact portion is in contact with the contact target, and an indicating mechanism that is attached to the holding mechanism and includes a position identification target indicating portion to be arranged at a position corresponding to a position identification target in a state in which the holding mechanism holds the patient. The position at which the position identification target indicating portion is to be arranged is determined based on a positional relationship between the contact target and the position identification target that is obtained in advance prior to surgery.