Use of a Customized Three-dimensional Guide in Preparing the Pilot Pedicle Hole in Spinal Deformities.

 The present study aimed to develop and evaluate the use of customized guides in patients undergoing surgery to correct vertebral deformity with a pedicular fixation system.  Four patients with spinal deformity (three with idiopathic scoliosis and one with congenital kyphoscoliosis) underwent surgical treatment to correct the deformity with a pedicular fixation system. Prototypes of 3D cost guides were developed and evaluated using technical feasibility, accuracy, and radiation exposure.

Cervical Myelopathy Secondary to Gout: Case Report.

Gout is a crystalline arthropathy frequent in the population, but gouty spondyloarthropathy, also called axial gout, is uncommon. The current case report presents a rare case of cervical myelopathy secondary to axial gout. A 50-year-old female patient, without previous pathologies, presented with loss of strength, altered sensitivity, and pyramidal release for 2 years.

The Role of Pedicle Screw Surface on Insertion Torque and Pullout Strength.

 Compare by mechanical tests the pullout resistance and the insertion torque of rough and smooth pedicle screws.  Pedicle screws with rough surface and smooth surface, with diameters of 4.8; 5.

Rotational dislocation C1-C2 after otoplasty under local anesthesia.

Non-traumatic rotational atlantoaxial subluxation (NTARS) is rare and mostly reported after infection of the upper respiratory tract and named Grisel's syndrome. NTARS has also been reported after head-and-neck surgery, but it is extremely rare after otoplasty. A case of NTARS after bilateral otoplasty is reported under local anesthesia, a 15-year-old female being presented with painful torticollis.

CHANGES IN THE LUMBAR VERTEBRAL SEGMENT RELATED TO THE CAGE POSITION IN TLIF TECHNIQUE.

Objective: To evaluate the morphological changes on the intervertebral foramen and segmental lordosis related to the transforaminal lumbar interbody fusion (TLIF) positioning.

Methods: PEEK cages were placed in the disc space (L1-S1) of a polyurethane anatomical model. Cages of different heights (8 mm, 10 mm, 12 mm and 14 mm) were positioned in the posterior, medial or anterior part of the vertebral body surface, and the intervertebral foramen and segmental lordosis heights were measured after their insertion.