Defects in the pars interarticularis
in the pediatric and adolescent population is a relatively common occurrence but is poorly described in the literature.
A lumbar vertebra associated with Individual 3 exhibited nonunion of the right pars interarticularis
Spondylolysis is known to be a part of a disease process, which describes a defect or stress fracture in the pars interarticularis
of the vertebra (1).
[2,7] Another opinion is that the coronal positioning of pars interarticularis
, which has a strong link to sacral and lumbar articular processes, may cause stress with micromotions and, thus, facilitates the development of spondylolysis.
A final tubular retractor was docked on the pars interarticularis
of interest, with the medial border of the retractor resting against the base of the spinous process and the caudal border just below the caudal edge of the lamina of interest.
 The reason for this is the inherent, high-load biomechanical nature of the bowling action[9,12] which may place undue stress on the pars interarticularis
during the delivery stride due to large contralateral lumbar side-flexion motion coupled with large ground reaction forces.
In the studies carried on the pathomechanism of spondylolytic spondylolisthesis , a thin pars model was created by removing half of the elements on one surface of the pars to see the effects of a thin pars interarticularis
on lysis and olistheis.
Histomorphic analysis of the development of the pars interarticularis
and its association with isthmic spondylolysis.
Essentially, a spondylolysis is a defect in the pars interarticularis
, an area of the vertebrae that connects the vertebral facets, or joints that adjoin vertebrae together.
In their approach, unilateral resection of the pars interarticularis
Based on the patient's progressive pain pattern and lack of recovery after 2 weeks rest, a pars interarticularis
stress fracture was suspected clinically.
(25) Some authors reserve the term hangman's fracture for those involving the pars interarticularis
, referred to more precisely as traumatic spondylolisthesis.