Accuracy of digital and analogue cephalometric measurements assessed with the sandwich technique.

Introduction: The purpose of the study was to evaluate the accuracy of cephalometric measurements obtained with digital tracing software compared with equivalent hand-traced measurements. In the sandwich technique, a storage phosphor plate and a conventional radiographic film are placed in the same cassette and exposed simultaneously. The method eliminates positioning errors and potential differences associated with multiple radiographic exposures that affected previous studies.

Comparison of measurements made on digital and plaster models.

Measuring plaster models by hand is the traditional method of assessing malocclusion. Recent technologic advances now allow the models to be digitized, measured with software tools, stored electronically, and retrieved with a computer. OrthoCAD (Cadent, Fairview, NJ) performs this service.

Treatment of a patient with a crowded Class I malocclusion and a congenitally missing mandibular incisor.

This case report describes the management of maxillary and mandibular crowding in a patient with facial esthetic concerns and a tooth-size discrepancy due to a missing mandibular central incisor. The treatment included extracting the remaining mandibular central incisor and the 2 maxillary first premolars. The mandibular canines were repositioned to substitute for lateral incisors, and the mandibular premolars were used as canines.