Biomechanical comparison of locking versus nonlocking volar and dorsal T-plates for fixation of dorsally comminuted distal radius fractures.

Objectives: The purpose of this study was to gain insight into the effect of plate location and screw type for fixation of extra-articular distal radius fractures with dorsal comminution (Orthopaedic Trauma Association Type 23-A3.2).

Methods: Sixteen pairs of cadaver radii were randomized to four plating configurations: dorsal locking, dorsal nonlocking, volar locking, and volar nonlocking.

Hypersensitivity to polymethylmethacrylate following shoulder hemiarthroplasty.

Acrylic resins have been used for many years in several health-related applications due to their ease of use, favorable material properties, and relative cost. Cements containing polymethylmethacrylate (PMMA), in particular, have been widely accepted for use in orthopedic surgery, as well as in other fields of medicine. Although relatively rare, the potential for acrylic resins such as PMMA to induce hypersensitivity reactions via cutaneous or mucosal exposures has been reported; however, comparatively few cases have been described of patients reacting adversely to acrylic resins used as permanent cements during surgical procedures.