A medical device for implantation in a hip joint of a human patient is provided. The natural hip joint having a ball shaped caput femur as the proximal part of the femoral bone with a convex hip joint surface towards the centre of the hip joint and a bowl shaped acetabulum as part of the pelvic bone with a concave hip joint surface towards the centre of the hip joint. The caput femur has a centrally placed longitudinal extension, extending through the center of the caput and collum femur, aligned with the collum femur, defined as the caput and collum femur center axis. The medical device comprising; an artificial acetabulum, comprising a concave surface towards the centre of the hip joint. The artificial concave acetabulum is adapted to, when implanted, be fixated to the femoral bone of the human patient, and be in movable connection with an artificial caput femur fixated to the pelvic bone of the patient.

One aspect of the invention provides a lag-screw-retaining clip including: a medial flange adapted and configured for engagement medially under a head of a laterally inserted screw of a trochanteric fracture nail system; an axial offset member coupled to the medial flange, the axial offset member including: a first, medial end coupled to the medial flange; and a second, lateral end; and a lateral flange coupled to the second, lateral end of the axial offset member. The lateral flange is adapted and configured to rest against a lateral end of a lag screw of the trochanteric fracture nail system and resist lateral movement of the lag screw.

A method for fixating an artificial convex caput femur surface to the pelvic bone of a patient, the method comprising the steps of: exposing the acetabulum surface, creating a hole or recess in the pelvic bone from the acetabulum side of the pelvic bone, providing the artificial convex caput femur, comprising an elongated member to the hip joint, inserting said elongated member in said hole, and performing an action on the acetabulum side of the pelvic bone such that the elongated member is structurally changed on the abdominal side of the pelvic bone or inside the pelvic bone.

A hip implant comprises an acetabular cup to be inserted into an acetabulum of a pelvis, together with a femoral head and neck portion and a main body shaft to be inserted into the femoral neck and proximal femoral shaft. The femoral head and acetabular cup form a smooth spherical-surface joint. The femoral head on a femoral head base is attached to a femoral neck rod, which has a tapered end that engages in a hole through the main body shaft, i.e. the main body shaft has a diagonal hole therethrough located at the center line of the neck of the femur to receive the tapered end at a specified angle that aligns with center line of the neck. A secured lock mechanism, insertable into the main body shaft above the diagonal hole, can be screwed down to compressively engage the tapered end of the femoral neck rod. The diagonal hole (and matching tapered end of the femoral neck) can have an overlapping two-circle cross-section, can have a specified taper angle, and a choice of incline to match a patient's femoral angle between the neck and shaft. The tapered neck rod can have wedge-shaped locking surface features to provide even more stability.

The current invention features a rod screw for medical application that can be configured and used to fixate fracture of bones varying in shape and dimension, and treating maladies such as scoliosis, and securing an implanted device, to tissue such as bone. This is achieved by designing a flexible rod screw with a mechanism to lock the configuration in a rigid state. In an embodiment, a bone-fracture fixation device, such as a rod screw, includes a flexible body, a plurality of flexible members, and first and second interfaces. The flexible members are disposed longitudinally within the flexible body, such that the flexible body is rigid when the flexible members are fixed into position. And the first and second interfaces are respectively coupled to the flexible body, each of at least one of the first and second interfaces including a respective at least one hole each configured to receive a respective attachment member configured to engage a bone.

An intramedullary nail implant for positioning in a bone having a head and a shaft defining an intramedullary canal. The implant includes a distal portion having a shaft extending along a central axis and configured for positioning within the intramedullary canal. A proximal portion extends proximally from the distal portion. The proximal portion defines a contact surface which extends at least in part medially of the central axis such that it is configured to extend within a medial portion of the bone head. A method of implanting the nail is also provided.

Intramedullary systems, expandable intramedullary nails, expandable anchors, and methods of using the same. The intramedullary system may include an expandable intramedullary nail configured to extend into an intramedullary canal of a long bone and/or one or more expandable anchors configured to extend at an angle transverse to the intramedullary nail. The intramedullary nails and/or anchors may include one or more integrated expansion mechanisms that allow for insertion in a contracted configuration and expansion into a deployed configuration to lock the relative position and prevent axial rotation and translation of the system.

Photodynamic devices for replacement of an articular head of a bone are provided. In an embodiment, a photodynamic device includes a photodynamic support member and an articular member attachable, either fixedly or removably, to the photodynamic support member and having a bearing surface. In an embodiment, the articular member includes a recess designed to receive the photodynamic support member. In an embodiment, the photodynamic support member includes an opening into which a shaft of the articular member can be inserted to attach the articular member to the photodynamic support member.

Photodynamic devices for replacement of an articular head of a bone are provided. In an embodiment, a photodynamic device includes a photodynamic support member and an articular member attachable, either fixedly or removably, to the photodynamic support member and having a bearing surface. In an embodiment, the articular member includes a recess designed to receive the photodynamic support member. In an embodiment, the photodynamic support member includes an opening into which a shaft of the articular member can be inserted to attach the articular member to the photodynamic support member.

A device for fixation of bone fragments (4, 8) comprises a locking plate (1) for fixation on the outside of an outer bone fragment (4). The locking plate has a distal portion (1 a) with at least one first hole (6), extending through the locking plate, for a distal fixing means (2) and a proximal portion (1 b) with a second hole (7), extending through the locking plate, for a proximal fixing means (3). The locking plate (1) is configured also with a third hole (9) which is located between said at least one first hole (6) in the distal portion (1 a) of the locking plate and said second hole (7) in the proximal portion (1 b) of the locking plate and this third hole extends as the other holes through the locking plate. The device further comprises a rotary-preventing and load-carrying means (10) which is configured for inser¬tion and fixation in said third hole (9) in the locking plate (1) and by cooperating with the proximal fixing means (3) prevent rotation of the proximal fixing means but permit displa¬cement thereof in its longitudinal direction relative to the rotary-preventing and load-car¬rying means during compression after surgery of the outer and inner bone fragments (4, 8) and facilitate for the proximal fixing means to carry loading forces acting on the inner bone fragment (8).