Pullout strength of 2.0 mm cancellous and cortical screws in synthetic bone.

Objective: To determine whether 2.0 mm cancellous screws are superior to 2.0 mm cortical screws when inserted into cancellous and bicortical bone.

Migration of extraluminal tracheal ring prostheses after tracheoplasty for treatment of tracheal collapse in a dog.

Case Description: An 8-year-old castrated male Yorkshire Terrier was evaluated because of a 1-month history of inspiratory dyspnea that began 2.5 years after placement of extraluminal tracheal ring prostheses for tracheal collapse.

Clinical Findings: Physical examination revealed severe inspiratory dyspnea.