Angled Ultrasonic Bone Curette-Assisted Circumferential Decompression for Thoracic Myelopathy Caused by Severely Anterior Ossification.

Objective: Thoracic myelopathy caused by severe anterior ossification is often progressive and fails to respond to conservative treatment. Removal of the compressing ossification is the most effective method but is hard to operate. In this study, we describe a novel one-stage posterior circumferential decompressive procedure assisted by an angled ultrasonic bone curette (UBC) for thoracic myelopathy caused by severe anterior ossification and evaluate its safety and efficacy.

Posterior Decompression and Fusion with Vertical Pressure Procedure in the Treatment of Multilevel Cervical OPLL with Kyphotic Deformity.

Objective: To report the outcomes and feasibility of a new technique to change K-line (-) to K-line (+) via only a posterior approach to treat multilevel non-continuous cervical ossification of the posterior longitudinal ligament (C-OPLL) with kyphotic deformity.

Methods: In this study, 17 consecutive cases of patients who underwent vertical pressure procedure (VP) combined with posterior cervical single-open-door laminoplasty and instrumented fusion from January 1, 2017 to December 31, 2019 were enrolled. The following radiographic parameters: C2-C7 Cobb angle, local Cobb angle, extent of OPLL, and the distance from OPLL to the K-line(DK) were measured and analyzed.

Surgical Management for Posterior Atlantoaxial Dislocation without Fracture and Atlantoaxial Dynamic Test to Confirm the Integrity of the Transverse Ligament: A Case Report.

Background: Traumatic posterior atlantoaxial dislocation (PAAD) without fracture of the odontoid process is a rare injury. Closed reduction by skull traction under C-arm fluoroscopic guidance and open reduction have been reported previously for the treatment of PAAD.

Objective: To report a rare case of PAAD without fracture treated by closed manual reduction and posterior fixation.

Design a novel integrated screw for minimally invasive atlantoaxial anterior transarticular screw fixation: a finite element analysis.

Purpose: To design a new type of screw for minimally invasive atlantoaxial anterior transarticular screw (AATS) fixation with a diameter that is significantly thicker than that of traditional screws, threaded structures at both ends, and a porous metal structure in the middle. The use of a porous metal structure can effectively promote bone fusion and compensate for the disadvantages of traditional AATSs in terms of insufficient fixation strength and difficulty of bone fusion. The biomechanical stability of this screw was verified through finite element analysis.