What is an accessory navicular Ossicle?
An accessory navicular is a large accessory ossicle that can be present adjacent to the medial side of the navicular bone. The tibialis posterior tendon often inserts with a broad attachment into the ossicle.
What are the surfaces of the navicular bone?
The navicular bone possesses two surfaces, two borders, and two extremities. The articular surface, which faces dorsoproximally, consists of a central eminence flanked by two concave areas, and articulates with the distal epiphysis of the middle phalanx.
What is Type 3 accessory navicular bone?
Introduction. The accessory navicular bone (ANB), of which three variants have been described, is often considered a normal anatomic variant. The type III, also known as the cornuate, gorilliform navicular, or horned navicular, is a rare congenital anomaly that could cause medial foot pain.
What is the navicular?
The navicular bone is one of the seven bones which make up the tarsus of the Ankle and Foot. It is located on the medial aspect of the foot, next to the cuboid bone, anterior to the head of the talus and posterior to the cuneiform bones.
What is Type 2 accessory navicular?
Type II is a secondary ossification center of the navicular bone and is also referred to as “prehallux”, accounting for approximately 50-60% of accessory navicular bones. It is seen over the medial pole of the navicular bone at between nine and 11 years of age (3).
What type of bone is the cuneiform?
There are three cuneiform (“wedge-shaped”) bones in the human foot: the first or medial cuneiform. the second or intermediate cuneiform, also known as the middle cuneiform….Cuneiform bones.
| Cuneiform bones; Cuneiform | |
|---|---|
| Latin | os cuneiformis pl. ossa cuneiformia |
| FMA | 71339 |
| Anatomical terms of bone |
What articulates with the navicular?
The navicular bone, located in the midfoot, articulates with the head of the talus, cuboid, and the three cuneiform bones that are involved in the acetabulum pedis.
Does everyone have an accessory navicular?
Up to 2.5 percent of individuals are born with the accessory navicular. Throughout early childhood, this condition is not noticed. However, in adolescence, when the accessory navicular begins to calcify, the bump on the inner aspect of the arch becomes noticed. For most, it is never symptomatic.
What is Mueller Weiss syndrome?
Mueller-Weiss syndrome is a complex condition of the adult tarsal navicular characterized by progressive fragmentation leading to mid- and hindfoot pain and deformity. Since its first descriptions in the early 20th century, controversy has persisted regarding its pathogenesis.
Is accessory navicular rare?
In summary, an accessory navicular is a fairly uncommon condition which is rarely symptomatic. Oftentimes nonsurgical treatment is successful. In the minority of cases, surgical intervention is required. Patients typically do very well with conservative and surgical treatment.
Is cuneiform phonetic?
Most later adaptations of Sumerian cuneiform preserved at least some aspects of the Sumerian script. Written Akkadian included phonetic symbols from the Sumerian syllabary, together with logograms that were read as whole words. Many signs in the script were polyvalent, having both a syllabic and logographic meaning.
Is the accessory navicular bone a normal ossicle?
The accessory navicular bone is one of several accessory ossicles of the foot and is considered as a normal anatomic and radiographic variant (1-10). Accessory navicular bones are classified into three types based on their shape and location in relation to the navicular bone (3-6).
What are the morphologic types of the accessory navicular?
The accessory navicular has 3 morphologic types.(Grogan, Gasser et al. 1989) Type 1 is a small oval to round ossicle within the tendon of the TPT. Type 2 is a larger lateral projection from the medial aspect of the navicular with a clear separation from the base of the navicular.
Which is painful type II or Type III navicular bone?
Type III is a prominent navicular tuberosity and is considered as a fused variant of the type II accessory navicular bone (3-7). Type II accessory navicular bone may be symptomatic and cause medial foot pain (7, 8).
What are the three types of ossicles?
Type 1 is a small oval to round ossicle within the tendon of the TPT. Type 2 is a larger lateral projection from the medial aspect of the navicular with a clear separation from the base of the navicular. Type 3 is a connected “horn” shaped prominence.