Dynamic compression plate fixation: a biomechanical comparison of unicortical vs bicortical distal screw fixation.

The use of unicortical screws instead of bicortical screws in the extreme outer holes of dynamic compression plates (DCPs) has been recommended to minimize the stress riser effect at the end of the plates. The authors examined in vitro two groups of paired canine femurs after compression plates had been applied to the anterolateral diaphyseal surface bilaterally. Group I: intact paired femurs with bicortical peripheral screws in one DCP and unicortical peripheral screws in the other; Group II: osteotomized paired femurs again comparing unicortical and bicortical peripheral DCP screws. All specimens were torsion tested to failure and the torque, stiffness, energy, rotation, and failure fracture length were calculated. Unicortical screws did not enhance the torsional strength in either group, and significantly compromised stiffness, energy, and rotation in the osteotomized group. The only apparent benefit of unicortical peripheral screws in a DCP was a shorter, less comminuted fracture upon failure.

The microcomputer as a management tool.

Computer technology must be applied to the use of administrative time with the same fervor that has been attached to the computerization of the medical record functions. This article explains database management systems and spreadsheet software, exploring their application to several administrative functions appropriate for medical record managers and supervisors. The benefits of integrated software are also discussed.

An attractive career opportunity--industrial health.

As health care delivery moves away from the acute care setting, so moves the MRA graduate. The entry-level graduate of today should be looking more at nontraditional health care settings for career opportunities. One such setting which can provide an attractive working environment for graduates is discussed in this article.