An 11-Year Review of the TARP Procedure in the Treatment of Atlantoaxial Dislocation.

Study Design: Retrospective study.

Objective: The aim of the study was to introduce the surgical techniques and evaluate the clinical outcomes of transoral atlantoaxial reduction plate (TARP) for the treatment of atlantoaxial dislocation.

Summary Of Background Data: Researchers have reported on transoral plate internal fixation for the treatment of irreducible atlantoaxial dislocation (IAAD) without long-term follow-up and detailed clinical experience.

The development and evaluation of individualized templates to assist transoral C2 articular mass or transpedicular screw placement in TARP-IV procedures: adult cadaver specimen study.

Objectives: The transoral atlantoaxial reduction plate system treats irreducible atlantoaxial dislocation from transoral atlantoaxial reduction plate-I to transoral atlantoaxial reduction plate-III. However, this system has demonstrated problems associated with screw loosening, atlantoaxial fixation and concealed or manifest neurovascular injuries. This study sought to design a set of individualized templates to improve the accuracy of anterior C2 screw placement in the transoral atlantoaxial reduction plate-IV procedure.

New clinical classification system for atlantoaxial dislocation.

The purpose of this study was to define a new clinical classification of atlantoaxial dislocation based on its clinical manifestations, namely reducible atlantoaxial dislocation (RAAD), irreducible atlantoaxial dislocation (IAAD), and fixed atlantoaxial dislocation (FAAD). A total of 107 patients with atlantoaxial dislocation were respectively treated based on this clinical classification, including 66 patients with RAAD, 39 patients with IAAD, and 2 patients with FAAD. Six of the 66 patients with RAAD with rotatory atlantoaxial dislocation were treated with traction and a cervical collar, 9 with fresh type II dens fracture were treated with cannulated screw fixation, and 51 were treated with posterior atlantoaxial or occipitocervical arthrodesis.

Transoral atlantoaxial reduction plate internal fixation with transoral transpedicular or articular mass screw of c2 for the treatment of irreducible atlantoaxial dislocation: two case reports.

Study Design: Retrospective report of two surgical cases and review of the literature.

Objective: To report the clinical application of transoral atlantoaxial reduction plate (TARP) internal fixation with a novel technique of transoral transpedicular or articular mass screw of C2 in the treatment of irreducible atlantoaxial dislocation and basilar invagination with ventral spinal cord compression.

Summary Of Background Data: Current surgical treatments for IAAD have various disadvantages, such as posterior decompression followed by atlantoaxial or occipitocervical fusion with unsatisfactory decompression, transoral decompression, and one-stage posterior instrumentation needing two approaches although with satisfactory decompression, resection of dens and/or clivus with potential risk of spinal cord injury and CSF leakeage.

[Diagnosis and treatment for complicated atlantoaxial dislocation].

Objective: To explore the clinical characteristics and treatment methods for complicated atlantoaxial dislocation.

Methods: A retrospective evaluation was done to summarize and analyze the clinical characteristics and complicated factors of 54 patients with complicated atlantoaxial dislocation who could not to be treated effectively by using conventional therapy in our hospital from February 2005 to October 2008. According to different complicated factors, different treatment methods mainly including transoral atlantoaxial reduction plate-III (TARP-III) operation, decompression procedure with deep grinding guided by computer aided design-rapid prototyping (CAD-RP), screw placement technique with CAD-RP guide plate and extensile approach surgery were performed.

Transoral atlantoaxial reduction plate internal fixation for the treatment of irreducible atlantoaxial dislocation: a 2- to 4-year follow-up.

Objective: To evaluate the mid-term outcomes of transoral atlantoaxial reduction plate (TARP) internal fixation for the treatment of irreducible atlantoaxial dislocation.

Methods: From April 2003 to April 2005, 31 patients with irreducible atlantoaxial dislocation were treated with TARP internal fixation. The average age was 37.

Transoral atlantoaxial reduction plate fixation for irreducible atlantoaxial dislocation.

Objective: To design a clinically applicable transoralpharyngeal atlantoaxial reduction plate (TARP), introduce the operation procedure, and evaluate its preliminary clinical effects.

Methods: A novel TARP system, including butterfly titanium alloy plate, self-locking screws, atlantoaxial reductor and other operational instruments was developed. This system was applied clinically on five patients with irreducible atlantoaxial dislocation of congenital or traumatic origin.

Irreducible anterior atlantoaxial dislocation: one-stage treatment with a transoral atlantoaxial reduction plate fixation and fusion. Report of 5 cases and review of the literature.

Study Design: Retrospective report of five surgical cases and review of the literature.

Objectives: To report the clinical application of a novel internal fixation device in the treatment of irreducible atlantoaxial dislocation with ventral spinal cord compression.

Summary And Background Data: Irreducible atlantoaxial dislocation with ventral spinal cord compression is difficult to treat.

[Design and preliminary clinical application of transoralpharyngeal atlantoaxial reduction plate].

Objective: To design transoralpharyngeal atlantoaxial reduction plate (TARP), evaluate its biomechanical performance and observe its preliminary clinical effect.

Methods: A brand-new TARP system was designed, including butterfly titanium alloy plate, self-locking screws, atlantoaxial reductor and other operation instruments. Twelve fresh occipital bone-C(3) specimen were designed for biomechanical test including range of motion (ROM) (n = 6) and screw pull-out strength (n = 12).