HIP ARTHROPLASTY


KNEE ARTHROPLASTY


ANKLE ARTHROPLASTY


SHOULDER ARTHROPLASTY


ELBOW ARTHROPLASTY


WRIST ARTHROPLASTY


FINGER ARTHROPLASTY


DATA QUALITY


GENERAL


GENERAL » Definitions and abbreviations » All definitions

A


Acetabulum component

The part of a hip prosthesis that is implanted into the acetabulum – the socket part of a ball and socket joint

 

Allograft

Transplant of bone tissue from a different body

 

Arthrodesis

A procedure in which a natural joint is fused together

 

Arthrofibrosis

Rigidity of the joint as a consequence of connective tissue adhesion

 

Arthroscopy

Keyhole surgery to examine and treat joint disorders

 

Arthrotomy

Opening a joint during surgery

 

Articulation

The two surfaces that move together (articulate) in a total joint replacement

 

ASA score

The American Society of Anaesthesiologists (ASA) score is a scoring system for grading the overall physical condition of the patient, as follows: I – fit and healthy; II – mild disease, not incapacitating; III – incapacitating systemic disease; IV – life threatening disease

 

Autograft

Transplant of bone tissue originating from the patient's own body


B


Bilaterality

Replacing the same joint on both sides of the body by means of a prosthesis within a specific period

 

Body Mass Index

Index for weight compared to body length (kg/m2); ≤18.5: underweight; >18.5-25: normal weight; >25-30: overweight; >30-40: obesity; >40: morbid obesity

 

Bonegraft

Bone transplant

 

Bone resorption

Process by which osteoclasts break down bone tissue


C


Carpal component

Part of a wrist prosthesis that is implanted in the patient's carpal bones

 

Case mix

Term used to describe variation in the population, relating to factors such as diagnosis, patient age, gender and health condition

 

Cement

Material (polymethyl methacrylate) used to fixate joint replacements to bone

 

Charnley score

Clinical classification system; A: one joint affected; B1: both joints affected; B2: contralateral joint with a prosthesis; C: several joints affected or a chronic disease that affects quality of life

 

Competing risk survival analyse

Method to calculate survival taking into account various outcomes, in this case revision and death

 

Completeness

The completeness of the number of registered procedures in the LROI, based on a comparison with the hospital information system of every hospital that performs hip and/or knee arthroplasty in the Netherlands

 

Cuff arthropathy

Osteoarthritis of the shoulder joint as a consequence of the tendons around the shoulder joint being affected

 

Cuff rupture

Rupture of a tendon of the muscles that are around the shoulder joint

 

Cumulative incidence

The added up incidence over a specific period of an event (such as revision of a prosthesis or death of a patient)

 

Cumulative revision percentage

Added up revision percentage over a specific time period


D


Difference score

Difference in calculating score between pre-operative and 3, 6 or 12 months postoperative scores

 

Distal component

Part of a finger prosthesis that replaces the distal phalanx

 

Distal hemihumeral prosthesis

Elbow prosthesis in which the distal part of the humerus (upper arm bone) is replaced

 

Dual mobility cup

Acetabular component that consists of a dual cup and, therefore, has two independent articulation points


E


EQ-5D index score

The EQ-5D index score measures quality of life. The score has a range of -0.329 to 1.0, with 1.0 representing the best possible quality of life.

 

EQ-5D thermometer score

The EQ-5D thermometer score measures the health situation. The score has a range of 0.0 to 100.0, with 0.0 representing the worst possible health situation and 100.0 the best possible health situation.


F


Femur component

Part of a hip or knee prosthesis that is implanted into the femur (thigh bone)

 

Femoral head component

Part of a hip prosthesis that is implanted on top of the femoral component of a hip prosthesis and moves inside the acetabular component or the cup of the hip joint

 

Flail elbow

Situation after removal of an elbow prosthesis in which no joint is present any more between the upper and lower arm


G


Girdlestone situation

Revision procedure to a hip in which the hip joint or hip prosthesis is removed and no new prosthesis is implanted (often because of a bacterial infection)

 

Glenoid baseplate

Part of a reversed shoulder prosthesis: a metal plate that is screwed into the glenoid (shoulder cup) of the shoulder blade, on which the glenosphere is fixed

 

Glenoid component

The part of a shoulder prosthesis that is placed in the glenoid; the cup-shaped notch of the shoulder blade

 

Glenoid liner

Intermediate component (inside layer) of a total anatomical shoulder prosthesis that will be placed in a glenoid component (most often a metal one)

 

Glenosphere

The part of a reversed shoulder prosthesis that is placed on the glenoid baseplate which is screwed into the glenoid and is spherical in shape


H


HOOS-PS score

The HOOS-PS score measures the physical functioning of patients with osteoarthritis to the hip. The score has a range of 0.0 to 100.0, with 0.0 representing no effort and 100.0 the most possible effort.

 

Hybrid fixation

Fixation of a prosthesis in which (most often) one of both parts of a prosthesis is cemented and the other one uncemented

 

Humerus component

The part of a shoulder or elbow prosthesis that replaces the humerus (upper arm bone). The humeral component of a shoulder prosthesis may consist of two parts: the humeral head and the humeral stem component

 

Humeral liner

Intermediate component (inner layer) of a reversed shoulder prosthesis that will be placed in a metaphysical component


I


Inlay       

Intermediate component (inner layer), made of polyethylene

 

Insert

Intermediate component (inner layer), made of polyethylene that is placed in the tibial component of a knee prosthesis


J



K


Kaplan Meier survival analysis

Method to calculate survival, in which only one end point is possible, in this case revision

 

KOOS-PS score

The KOOS-PS score measures the physical functioning of patients with osteoarthritis to the knee. The score has a range of 0.0 to 100.0, with 0.0 representing no effort and 100.0 the most possible effort.


L


Lateral collateral ligament

Lateral (outer) knee ligament or elbow ligament

                                                     

Lateral resurfacing arthroplasty

Elbow prosthesis in which only the lateral side of the joint is replaced


M


Major revision

Revision of at least the acetabular or femoral component (hip) or femoral or tibial component (knee)

 

Malalignment

Strain on a part of the body due to an abnormal position of a joint component with respect to other components

 

Medial malleolus osteotomy

Surgical approach of the ankle in which the medial malleolus (protruding part of the tibia on the inside of the ankle) is incised and later re-fixed to be able to have better access to the inside of the joint

 

Meniscectomy

Meniscus removal

 

Metallosis

Deposition of metal debris in soft tissues of the body

 

Metaphysis component

The part of a shoulder prosthesis that replaces the metaphysis (upper part) of the humerus (upper arm bone)

 

Minor revision

Revision of only inlay and/or femoral head component (hip) or only insert and/or patella exchange (knee)


N


NRS score

Numeric Rating Scale score. The NRS (rest) score measures pain during rest. The NRS (activity) score measures pain during activity. The score has a range of 0.0 to 10.0, with 0.0 representing no pain and 10.0 representing the most possible pain


O


Olecranon

The most proximal part of the ulna

 

Open Reduction and Internal Fixation surgery

Type of surgery to treat a bone fracture where the broken bone is reduced or put back into place, followed by internal fixation using devices (screws, plates, rods, or pins) to hold the broken bone together

 

Osteoarthritis

Disorder in which the cartilage of a joint is affected

 

Osteochondral bone defect

Defect of the joint surface in which both cartilage and underlying bone are affected

 

Osteonecrosis

Cellular death of bone tissue

 

Osteosynthesis

Securing broken bone parts together with plates, pins and/or screws

 

Osteotomy

Incise the bone in order to correct the position, to shorten or lengthen the bone

 

Oxford Hip score

The Oxford Hip score measures the physical functioning and pain of patients with osteoarthritis to the hip. The score has a range of 12.0 to 60.0, with 12.0 representing no functional disability and 60.0 the most possible functional disability.

 

Oxford Knee score

The Oxford Knee score measures the physical functioning and pain of patients with osteoarthritis to the knee. The score has a range of 0.0 to 48.0, with 0.0 representing the most possible functional disability and 48.0 no functional disability.


P


Patella addition

Knee revision procedure in which only a patella component was added to the primary knee prosthesis

 

Patella component

Part of a knee prosthesis that is implanted on the inner side of the knee cap

 

Patellofemoral prosthesis

Two-piece knee prosthesis that provides a prosthetic (knee) articulation surface between the patella and trochlea (furrow) of the thigh bone (femur)

 

Primary prosthesis

The first time (primary) a prosthesis is implanted to replace the original joint

 

PROMs

Patient Reported Outcome Measures

 

Proximal component

Part of a finger prosthesis that replaces the proximal phalanx


Q



R


Radial head component

Part of an elbow prosthesis that replaces the head of the radius (spoke-bone)

 

Radial head prosthesis

Elbow prosthesis in which only the head of the radius (spoke-bone) is replaced

 

Radial stem component

Part of an elbow or wrist prosthesis that is implanted in the shaft of the patient's radius (spoke-bone)

 

Resurfacing hip arthroplasty

Hip prosthesis in which the cup (acetabulum) is replaced and a metal cap is implanted on top of the femoral head

 

Resurfacing shoulder arthroplasty

Shoulder prosthesis in which a metal cap is implanted on top of the humeral head

 

Reversed hybrid fixation hip prosthesis

Fixation of a hip prosthesis in which the acetabular component is cemented and the femoral component is uncemented

 

Reversed shoulder prosthesis

Adjusted type of total shoulder arthroplasty in which the parts are implanted in a reversed manner. A sphere (glenosphere) is implanted onto the glenoid and a stem with cup in the shaft of the shoulder head

 

Revision arthroplasty

Any change (insertion, replacement and/or removal) of one or more components of the prosthesis


S


Sauvé Kapandji procedure

Arthrodesis of a natural wrist joint and construction of a new wrist joint by splitting the ulna

 

Shoulder hemiarthroplasty

Shoulder hemiarthroplasty with humeral stem, stemless hemi shoulder prosthesis (without humeral stem) or resurfacing shoulder hemiarthroplasty

 

Synovectomy

Removal of inflamed mucosa in a joint


T


Talus component

Part of an ankle prosthesis that is inserted in the talus (ankle bone)

 

Tibia component

Part of a knee or ankle prosthesis that is inserted in the tibia (shin bone)

 

Total arthroplasty

Arthroplasty in which the entire joint of a patient is replaced


U


Ulnar component

Part of an elbow or wrist prosthesis that is inserted in the ulna

 

Ulnar nerve

One of the three nerves that runs along the elbow. This nerve largely runs along the ulna

 

Unicondylar knee arthroplasty

Replacement of half the knee (either inner or outer side) by a prosthesis


V


Validity

Level of accuracy and completeness of registered data


W


Walch score

Clinical classification system for level and type of wear of a shoulder joint; A1: humeral head centred, minimal erosion of shoulder cup; A2: humeral head centred, substantial erosion of shoulder cup; B1: Posterior subluxation of humeral head, posterior joint cavity narrow, subchondral sclerosis and osteophytes; B2: posterior subluxation of humerus head, retroversion of shoulder cup with posterior erosion; C: retroversion of shoulder cup over 25 degrees, irrespective of erosion


X



Y



Z