Posterior arch defects
نویسندگان
چکیده
منابع مشابه
Congenital defects of posterior arch of the atlas : a case report
Congenital anomalies of the posterior arch of the atlas (first cervical vertebrae) are very uncommon but well documented. This condition is usually asymptomatic and diagnosed incidentally. Nevertheless some patients present with some degree of transient or chronic neurological symptoms following minor neck or head trauma [1,2]. We present a case with congenital defect of posterior arch of atlas...
متن کاملIncidence and Variants of Posterior Arch Defects of the Atlas Vertebra
In order to describe the incidence and existing variants of congenital anomalies of the atlas vertebrae in a Caucasian population, we examined 1069 CT scans of the upper cervical spine. We found 41 cases with altered atlas vertebrae, representing 3.8% of all analyzed patients. With 83% of all found anomalies, the predominant type is characterized by a small dorsal cleft (3.2% of all patients). ...
متن کاملPosterior Arch Defects of the Atlas - A Report of Two Cases and Literature Review
The patient denied irradiation of the pain and the neurological exam was completely normal. A neck radiograph was obtained, showing a defect in the posterior arch of the atlas (Figure 1). This defect was posteriorly evaluated with a CT-scan and better documented as a segmental aplasia of both hemiarches (Figure 2). Providing the lack of neurological symptoms, the patient was treated conservativ...
متن کاملUnilateral posterior arch fractures of the atlas.
Unilateral posterior arch fractures of the atlas are discussed with two clinical examples and an experimental study of their mechanism. Laboratory fracturing of posterior arches of atlas specimens with a specially adapted universal testing machine produced nonsimultaneous fractures of the two sides in four of six specimens. In three of these specimens, a complete fracture on one side was tempor...
متن کاملPartial aplasia of the posterior arch of the atlas with an isolated posterior arch remnant: findings in three cases.
We report the imaging findings in three symptomatic cases of partial aplasia of the posterior arch of the atlas with an isolated posterior remnant of the arch. These cases are instructive in illustrating the mechanism of cord impingement produced by the posterior arch remnant during extension of the cervical spine. Additionally, focal increased T2 signal was observed within the cord at the leve...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: American Journal of Orthodontics and Dentofacial Orthopedics
سال: 2021
ISSN: 0889-5406
DOI: 10.1016/j.ajodo.2020.11.024