Provided are improved hip prosthetic devices that reduce the risk of hip dislocation upon performing artificial hip replacement. The improved hip prosthetic devices comprise a flexible bumper configured to extend from the acetabular component and prevent contact between the femoral neck and the acetabular component. The bumper may be an acetabular capsule inserted in collaboration with a standard hip prosthetic device, and attached to a standard acetabular liner. The capsule has a bumper region that cushions contact between the femoral neck and the acetabular component, thereby preventing impingement and dislocation, both common in patients in which known hip prosthetic devices are used. Alternatively, an improved acetabular liner comprises an integral bumper which prevents impingement of the femoral neck and acetabular components, thereby reducing dislocation risk and securing the femoral head within the acetabular liner.

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.

A medical device for treating hip joint osteoarthritis by providing a joint surface is provided. The medical device comprises at least two artificial hip joint surface parts, wherein said at least two artificial hip joint surface parts are adapted to be connected to each other to form an artificial hip joint surface during an operation. Furthermore a method of treating a hip joint of a human patient by providing said the medical device is provided. The hip joint comprising a caput femur and an acetabulum, the method comprises the steps of: cutting the skin of said human patient, dissecting an area of the pelvic bone on the opposite side from said acetabulum, creating a hole in said dissected area, said hole passing through said pelvic bone and into said hip joint of said human patient, and providing said medical device to said hip joint, through said hole in said pelvic bone of said human patient.

Described herein are systems and methods for the placement and design of the stability components of implant systems. Further, stability component assemblies, such as dual-mobility assemblies, for implant systems are also described herein. The systems and methods include using a standing sacral slope and a sitting sacral slope associated with a spine of a patient, determining a spine mobility based on the standing sacral slope and the sitting sacral slope, receiving poses of the implant system components, determining contact points between the components and locations of at least one of the components through a range of motion, receiving updated inclination and anteversion angles for the stability components of the implant system, and outputting an updated configuration for the stability component.

A liner adapted for insertion into an acetabular shell for use in hip arthroplasty. The liner includes a concave inner surface adapted to engage a femoral head. The liner also includes an outer surface adapted to engage the acetabular shell and a rim that extends between the inner surface and the outer surface. The outer surface includes a locking section extending from the rim, a composite-curved section extending from the locking section at a first transition point, and a dome section extending from the composite-curved section, wherein at the first transition point, the composite-curved section is tangential to the locking section.

A surgical pelvic drill for operating hip osteoarthritis adapted to create a hole in the pelvic bone of a human patient is provided. The pelvic drill is adapted to create a through-going hole placed in the acetabulum area from the abdominal side of the pelvic bone of the human patient. The pelvic drill comprises: a driving member, a bone contacting organ in connection with said driving member, an operating device adapted to operate said driving member. The bone contacting organ is adapted to create a hole in the acetabulum area starting from the abdominal side of the pelvic bone through repetitive or continuous movement. A surgical and a laparoscopic/arthroscopic method of using said pelvic drill is further provided.

A method of treating a hip joint of a human patient by providing at least one hip joint surface comprising the steps of: cutting the skin of the human patient, dissecting an area of the pelvic bone on the opposite side from the acetabulum, creating a hole in the dissected area from the opposite side from the acetabulum, the 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 from the opposite side from the acetabulum, through the hole in the pelvic bone of the human patient.

The invention features acetabular components for an artificial hip. The invention also features methods and tools for assembling a hip prosthesis that includes the acetabular components of the invention.

A kit for use in arthroplasty. The kit including a shell which has a shell locking section. The kit further including a liner adapted to be inserted into the shell. The liner includes an inner surface and an outer surface, wherein the inner surface is generally concave. The outer surface is adapted to engage the shell, and includes a liner locking section and a curved section. The curved section has a radius. The shell locking section and the liner locking section are adapted to engage one another. The shell locking section and the liner locking section are self-locking tapers. The curved section extends tangentially from the liner locking section at a first transition point.

A mold adapted to be introduced into a joint of a human patient for resurfacing at least one carrying contacting surface of said joint is provided. The mold is adapted to receive material for resurfacing at least one carrying contacting surface of said joint. The mold is further adapted to be resorbed by the human body or melt after having served its purpose. Further, a method of treating hip joint osteoarthritis in a human patient by providing an artificial hip joint surface using a mold is provided. The method comprises the steps of: said mold being placed inside of said hip joint, said mold being injected with a fluid adapted to harden, said fluid hardening inside of said hip joint, said mold being resorbed by the human body, and said hardened fluid serving as artificial hip joint surface.