What are ossicles in hip?
Ossicles located at the acetabular rim are generally referred to as unfused secondary ossification centres and are named “os acetabuli”. They are also observed in severely dysplastic hips, where they are considered as fatigue fractures of the acetabular rim due to overload.
What is a bone Ossicle?
Ossicles are “small bones” – the definition is really that broad! In human anatomy, the small bones in the middle ear are referred to as “the ossicles”, but there are many other small bones in the hand and feet that appear are normal variant anatomy and are termed “accessory ossicles”: ossicles of the middle ear.
What are ossicles in the elbow?
Two accessory ossicles are known to occur about the elbow joint: the os supratrochleare and the patella cubiti. The os supratrochleare is a developmental ossicle believed to originate from an accessory ossification centre of the olecranon. When present, it is located within the joint capsule in the olecranon fossa.
What is Ossicle in shoulder?
Accessory ossicles are secondary ossification centers that remain separate from the adjacent bone. They are usually round or ovoid in shape, occur in typical locations and have well defined smooth cortical margins on all sides.
What does accessory Ossicle mean?
Accessory ossicles are supernumerary and inconstant structures that are not caused by fractures. Derived from unfused ossification centers, accessory ossicles were first described by Vesalius in 1543. For centuries, they were believed to be asymptomatic.
What causes an accessory Ossicle?
Fractures (acute and stress) and dislocations are the most commonly reported causes of accessory ossicle disorders [3-5]. They are often confused with avulsion fractures. As a result of fractures, these bones may be infected or dislocated [1-2,6-9].
What causes an ossicle?
What type of bones are ossicles?
The term “ossicle” literally means “tiny bone”. Though the term may refer to any small bone throughout the body, it typically refers to the malleus, incus, and stapes (hammer, anvil, and stirrup) of the middle ear.
What causes an Ossicle?
What is an ossicle in the wrist?
What is an unfused ossicle?
Unfused ossicles result from accessory ossification centers near the tip of the vertebral processes. Unfused ossicles result from accessory ossification centers near the tip of the vertebral processes (fig. 1). Their main importance lies in distinguishing them from fractures.