A medical device for implantation in a hip joint of a human patient, 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 center of the hip joint and a bowl shaped acetabulum as part of the pelvic bone with a concave hip joint surface towards the center of the hip joint. The medical device comprising; an artificial caput femur, comprising a convex surface towards the center of the hip joint. The artificial convex caput femur is adapted to, when implanted: be fixated to the pelvic bone of the human patient, and be in movable connection with an artificial acetabulum surface fixated to the femoral bone of the patient, thereby forming a ball and socket joint. The medical device further comprises a fixation element comprising a fixation surface adapted to be in contact with the surface of the acetabulum and adapted to fixate the artificial convex caput femur to at least the acetabulum of the pelvic bone.

A method for implantating a medical device in a hip joint of a patient is provided. The medical device is adapted to be fixated to the pelvic bone of the patient, and comprises an inner and an outer surface, a contacting portion of the inner surface is spherical and adapted to face the center of the hip joint when said medical device is implanted, and said medical device is adapted to receive a caput femur or a prosthetic caput femur having a spherical portion. The medical device comprises at least one extending portion adapted to clasp the caput femur, or prosthetic caput femur, for restraining said caput femur, or prosthetic caput femur in said medical device. The medical device is adapted to release the caput femur or prosthetic caput femur from the medical device when a predetermined strain is placed on the medical device. The ability of the medical device to release the caput femur or prosthetic caput femur from the medical device when a predetermined strain is placed on the medical device reduces the risk that the prosthesis is loosened by an abnormal strain being placed on the hip joint from e.g. the patient falling or making a rapid movement of the hip.

A method of treating a hip joint of a human patient using a pelvic drill comprising a driving member, a bone contacting and an operating device for operating said driving member. The method comprise the steps of creating a hole passing through the pelvic bone and into the hip joint of the human patient, and providing at least one hip joint surface to the hip joint, through said hole in the pelvic bone of the human patient. In one embodiment the method includes inserting a needle or tube like instrument into the patient's body for filling a part of the patient's body with gas and thereby expanding a cavity within the body.

An acetabular hip implant includes a plurality of rings secured to an acetabular shell component. A method of fabricating a customized, patient-specific version of such an implant is also disclosed.

An implantable medical device for implantation in a hip joint of a human patient is provided. The medical device comprises: at least one artificial hip joint surface adapted to replace at least the surface of at least one of the caput femur and acetabulum. At least one artificial hip joint surface comprises: a positioning hole with at least one opening in said at least one artificial hip joint surface. The hole is adapted to be placed and dimensioned such that the medical device is adapted to be fitted using a positioning shaft and at least partly surround the shaft, for positioning the at least one artificial hip joint surface in a desired position in the hip joint. The hole is adapted to be fitted using the positioning shaft, when the shaft is stabilized and placed in at least one of the femoral bone and the pelvic bone for positioning said medical device inside the hip joint.

Method of installing a medical device in a hip joint of a human patient, said medical device comprising a first piece comprising a convex contacting surface and a second piece comprising a concave contacting surface for creating a prosthetic joint, said medical device further comprising a releasing member configured to in a first state hold said first piece attached to said second piece, and in a second state release said first piece from said second piece said method comprising the steps of exposing the hip joint through a surgical or arthroscopic procedure, fixating said first piece of said medical device to a pelvic bone, fixating said second piece of said medical device to a femoral bone, placing said first piece in connection with said second piece, and holding said first piece to said second piece using said releasing member.

A method of treating a hip joint of a human is provided. The method comprises a step of dissecting an area of the pelvic bone, comprising at least one of the following: dissecting an area between peritoneum and the pelvic bone, dissecting an area between the pelvic bone and the surrounding tissue, dissecting an area of the pelvic region, and dissecting an area of the inguinal region, or, the method comprises at least two of the following steps: dissecting an area of the abdominal cavity, penetrating the hip joint capsule, dissecting an area between peritoneum and the pelvic bone, dissecting an area of the pelvic bone which comprises: dissecting an area between the pelvic bone and the surrounding tissue, or dissecting an area of the pelvic region, or dissecting an area of the inguinal region, and removing or penetrating the tissue surrounding the pelvic bone in the area opposite to acetabulum.

An implantable medical device, for implantation in a mammal knee joint, comprising an artificial contacting surface adapted to replace at least one contacting surface of the knee joint and to be lubricated when implanted in said joint. The medical device further comprises a reservoir comprising a movable wall portion defining the volume of the reservoir, at least one inlet adapted to receive a lubricating fluid from the reservoir, at least one channel at least partly integrated in said artificial contacting surface, wherein the channel is fluidly connected with said at least one inlet for distributing said lubricating fluid to the surface of said artificial contacting surface. The medical device further comprises an operation device adapted to non-invasively transport said lubricating fluid from said reservoir to said artificial contacting surface, and an implantable injection port for refilling said reservoir, wherein the movable wall portion is moved when the reservoir is refilled, such that the volume of the reservoir is increased.

A surgical instrument for operating hip joint osteoarthritis in a human patient is provided. The hip joint comprises an acetabulum, being a part of the pelvic bone, and a caput femur, being the proximal part of the femoral bone. The surgical instrument is adapted to assist in the operating of the hip joint osteoarthritis from the abdominal side of the pelvic bone of said human patient.

A medical device for delivering an action to an area of a hip joint or its surroundings, inside a human body, is provided. The hip joint of a patient comprises a collum femur and a ball shaped caput femur, being the proximal parts of the femoral bone, and an acetabulum, being a bowl shaped part of the pelvic bone. The medical device comprising; an elongated member, having a length axis along its elongated distribution, comprising a first portion, adapted to enter the body of the patient, and a mechanical element, adapted to be used during an operation in the hip joint or its surroundings, inside the body. The first portion of the elongated member comprises a holding member adapted to hold the mechanical element inside the body of the patient, wherein the first portion of the elongated member have a first portion cross-section area substantially perpendicular to the length axis of the elongated member. The first portion is adapted to pass through a hole, in a bone of the patient, the hole having a hole cross-section area. The first portion cross-section area, is adapted to be smaller than said hole cross-section area. The mechanical element have a functional status, ready to deliver said action inside said body, when held by the holding member inside the body of the patient. The mechanical element is adapted to have a mechanical element cross-sectional area substantially perpendicular to the length axis of the elongated member, substantially larger than the first portion cross-sectional area and adapted to be unable to pass through the hole, when the mechanical element is in the functional status.