9/23 Questions Flashcards
What is nonstructural scoliosis?
A mild form of scoliosis,
Unlikely to worsen
Not associated with structural deformities of the vertebra or intervertebral disc
Lacks a fixed angle of trunk rotation
What does idiopathic scoliosis infer?
the scoliosis is unique to the individual, it has no known cause, unknown etiology
What are the transition zones of the vertebral column?
occipitocervical, cervicothoracic, thoracolumbar, lumbosacral, and sacrococcygeal zones
When do the bilateral ossification centers for the odontoid process fuse?
at or shortly after birth
What joint is formed between the odontoid process ossification centers and the centrum of C2?
the subdental synchondrosis
What is the classification of the joint formed between the C2 odontoid process and centrum?
amphiarthrosis synchondrosis
Ossification between the odontoid process and centrum joint of C2 first appears at what age?
4 years old
A joint between the odontoid process and centrum of C2 is last identified at what age?
7 years old
What is the name given to the condition in which the joint formed between the odontoid process and centrum of C2 persists beyond age 7?
os odontoideum
What is the name given to the joint between the odontoid process and centrum of C2 which is still evident beyond age 7?
persistent subdental synchondrosis
What is the name given to the joint formed between the tip of the dens and the odontoid process centers of ossification?
tip of the dens synchondrosis
What is the classification of the joint formed between the tip of the dens and odontoid process centers of ossification?
amphiarthrosis synchondrosis
At what age will the tip of the dens center of ossification appear?
sometime in early adolescence
Based on the age of appearance, how is the tip of the dens center of ossification classified?
secondary center of ossification
At what age will the tip of the dens fuse with the odontoid process?
before age 12
