What is coronoid fracture?
Coronoid fractures are a break in the coronoid process of the ulna due to trauma or injury. A coronoid fracture of the ulna is a complex intraarticular fracture that is difficult to expose due to complex surrounding anatomical structures.
Where is a coronoid fracture?
The coronoid process of the ulna is one of the bony structures that can be fractured and has an important role in the stability of elbows after dislocation. Coronoid fractures are relatively uncommon injuries occurring in approximately 2% to 15% of patients with dislocation.
Why is the terrible triad?
Abstract. Fracture-dislocations of the elbow remain among the most difficult injuries to manage. Historically, the combination of an elbow dislocation, a radial head fracture, and a coronoid process fracture has had a consistently poor outcome; for this reason, it is called the terrible triad.
What causes a terrible triad of the elbow?
The terrible triad of the elbow is defined as the combination of fractures of the radial head and ulnar coronoid process and dislocation of the elbow joint4 (Fig. 3), and is often associated with collateral ligaments injuries.
How many Coronoid processes are there?
The coronoid process and condyloid process are located at the superior aspect of the ramus. The coronoid process is anterior and the condyloid process is posterior; the two are separated by the mandibular notch. The ramus is bound by two surfaces and four borders and contains two processes.
What is coronoid process of ulna?
The ulna’s coronoid process is the bony prominence on the most proximal portion of the ulna’s volar surface. In connection with the olecranon process, it forms the greater sigmoid notch which articulates with the distal humerus at the elbow joint. It serves as a buttress, preventing posterior displacement of the ulna.
What is a triad fracture?
1. Topic. Terrible Triad Injury of Elbow is a traumatic injury pattern of the elbow characterized by elbow dislocation, radial head/neck fracture, and a coronoid fracture.
What is the structure of coronoid process?
The coronoid process is a triangular eminence projecting forward from the upper and front part of the ulna. Its base is continuous with the body of the bone, and of considerable strength. Its apex is pointed, slightly curved upward, and in flexion of the forearm is received into the coronoid fossa of the humerus.
What bone contains the Coronoid process?
The coronoid process is found on the ulna and interfaces with the coronoid fossa of the humerus in the elbow.
On which bones do we find a coronoid process?
The coronoid process is found on the ulna and interfaces with the coronoid fossa of the humerus in the elbow. Damage or dislocation of the elbow can cause the coronoid process to fracture.
What is coronoid anatomy?
Medical Definition of coronoid process 1 : the anterior process of the superior border of the ramus of the mandible. 2 : a flared process of the lower anterior part of the upper articular surface of the ulna fitting into the coronoid fossa when the arm is flexed.
What are the three C’s of the knee?
Most commonly, the Meniscus (Cartilage), the Anterior Cruciate Ligament (ACL), Lateral Collateral Ligament (LCL) and Posterior Cruciate Ligament (PCL) get damaged. These parts of the knee serve a variety of purposes such as stabilizing your knee, providing cushion from impact as well as strength.
What is the terrible triad of O Donoghue?
In 1950, O’Donoghue described the unhappy triad as: (1) rupture of the medial collateral ligament, (2) damage to the medial meniscus and (3) rupture of the anterior cruciate ligament. O’Donoghue estimated the incidence rate in the traumatic sports knee to be 25%.
What muscles attach to coronoid process?
The coracoid process serves as the attachment site for several muscles. The pectoralis minor is attached to the medial aspect of the coracoid. The coracobrachialis is attached to the tip of the process on the medial side, and the short head of the biceps is attached to the tip of the process on the lateral side.
What are the radiographic features of coronoid process fractures?
Radiographic features. Coronoid process fractures may be diagnosed on a plain film series of the elbow, generally on a lateral or a 45° internal oblique view 4. CT is commonly necessary for fracture characterization of the fragment size, the degree of anteromedial involvement, and complex fracture-dislocation.
What is the best approach to repair a large coronoid fracture?
Large coronoid fragment needs open reduction and internal fixation. Coronoid fracture is fixed first through the lateral approach followed by radial head and ligament repair. Biggest challenge in fixation of coronoid fracture is adequate surgical exposure.
What is a coronoid fracture of the ulna?
The coronoid process is one of the bony structures that can get fractured. It plays an important role in the elbow’s stability after dislocation. Though coronoid fractures of the ulna are uncommon, it is critical to identify if one does occur. There are three types of coronoid fractures as described by Regan and Morrey:
What is a type 1 coronoid fracture?
Type 1 coronoid fractures have very small fragments. Isolated tip fractures can be left alone if the elbow is stable and if there is no mechanical block to movement. Instability and anteromedial facet fractures are treated by surgery. Driscoll type 1 fractures are fixed with small screws, cerclage, suture anchor or K wires.