Protrusio acetabuliBrian Goodwin: Brian Carey Goodwin (25 March 1931 – 15 July 2009) was a Canadian mathematician and biologist, a Professor Emeritus at the Open University and a key founder of the field of theoretical biology. He made key contributions to the foundations of biomathematics, complex systems and generative models in developmental biology.Hip resurfacing: 155px|right|thumb|The BHRAlbert Narath: Albert Narath (September 13, 1864, Vienna – August 15, 1924, Heidelberg) was an Austrian surgeon and anatomist.OsteotomyMinimally invasive hip resurfacing: Minimally invasive hip resurfacing (MIS) is "total or partial hip surgery that can be carried out through an incision of less than 10 cm (3.94 inches) without imparting great forces on the anatomy or compromising component positioning"Comis Orthopaedics websiteMetallosis: Metallosis is the putative medical condition involving deposition and build-up of metal debris in the soft tissues of the body.Nelaton's line: In anatomy, the Nelaton's Line (also known as the Roser-Nélaton line) is a theoretical line, in the moderately flexed hip, drawn from the anterior superior iliac spine to the tuberosity of the ischium.Inguinal ligament: The inguinal ligament (Poupart's ligament) is a band running from the pubic tubercle to the anterior superior iliac spine. Its anatomy is very important for operating on hernia patients.Georg Perthes: Georg Clemens Perthes (17 January 1869 – 3 January 1927) was a German surgeon and X-ray diagnostic pioneer.HypochondrogenesisDemineralized freeze dried bone allograft: Demineralized freeze dried bone allograft, referred to as DFDBA, is a bone graft material known for its [novo] bone formation properties.Bowers, GM, et al.Hip arthroscopy: Hip arthroscopy refers to the viewing of the interior of the acetabulofemoral (hip) joint through an arthroscope and the treatment of hip pathology through a minimally invasive approach. This technique is sometimes used to help in the treatment of various joint disorders and has gained popularity because of the small incisions used and shorter recovery times when compared with conventional surgical techniques (sometimes referred to as "open surgery").Woe of TyrantsArthrogramMotretinideChalkstick fracture: Chalkstick fractures are fractures, typically of long bones, in which the fracture is transverse to the long axis of the bone, like a broken stick of chalk. A healthy long bone typically breaks like a hard woody stick as the collagen in the matrix adds remarkable flexibility to the mineral and the energy can run up and down the growth rings of bone.Progressive osseous heteroplasia: Progressive osseous heteroplasia is a cutaneous condition characterized by cutaneous or subcutaneous ossification.Revision using distal inflow: Revision Using Distal Inflow (RUDI) is a surgical treatment for Dialysis-associated Steal Syndrome.Ultra-high-molecular-weight polyethylene: Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplastic polyethylene. Also known as high-modulus polyethylene, (HMPE), or high-performance polyethylene (HPPE), it has extremely long chains, with a molecular mass usually between 2 and 6 million u.CeramicTraction substation: A traction substation or traction current converter plant is an electrical substation that converts electric power from the form provided by the electrical power industry for public utility service to an appropriate voltage, current type and frequency to supply railways, trams (streetcars) or trolleybuses with traction current.Cement: A cement is a binder, a substance that sets and hardens and can bind other materials together. The word "cement" can be traced back to the Roman term opus caementicium, used to describe masonry resembling modern concrete that was made from crushed rock with burnt lime as binder.Linear low-density polyethylene: Linear low-density polyethylene (LLDPE) is a substantially linear polymer (polyethylene), with significant numbers of short branches, commonly made by copolymerization of ethylene with longer-chain olefins. Linear low-density polyethylene differs structurally from conventional low-density polyethylene (LDPE) because of the absence of long chain branching.Robert BrobergArcoOsseointegration: Osseointegration derives from the Greek osteon, bone, and the Latin integrare, to make whole. The term refers to the direct structural and functional connection between living bone and the surface of a load-bearing artificial implant.OsteolysisDense artery sign: In medicine, the dense artery sign or hyperdense artery sign is a radiologic sign seen on computer tomography (CT) scans suggestive of early ischemic stroke. In earlier studies of medical imaging in patients with strokes, it was the earliest sign of ischemic stroke in a significant minority of cases.Volume rendering: 250px|thumb| A volume rendered cadaver head using view-aligned [[texture mapping and diffuse reflection]]Internal fixationHerbert screw: The Herbert screw (invented by Timothy Herbert) is a variable pitch cannulated screw typically made from titanium for its stainless properties as the screw is normally intended to remain in the patient indefinitely. It became generally available in 1978.Femoral neck targeting: Femoral neck targeting is the process of calculating the centre of the femoral neck during hip resurfacing surgery.Comis MIHR operative technique This can be done by hand or using electronic aides.ArthroscopyArticular cartilage repair: The aim of an articular cartilage repair treatment is to restore the surface of an articular joint's hyaline cartilage. Over the last decades, surgeons and researchers have been working hard to elaborate surgical cartilage repair interventions.Mechanochemistry: Mechanochemistry or mechanical chemistry is the coupling of mechanical and chemical phenomena on a molecular scale and includes mechanical breakage, chemical behaviour of mechanically stressed solids (e.g.Titanium nitrideBone tumor