Digital versus plaster study models: how accurate and reproducible are they?

Objective: To compare measurements of occlusal relationships and arch dimensions taken from digital study models with those taken from plaster models.

Design: Laboratory study

Setting: The Orthodontic Department, Kettering General Hospital, Kettering, UK Methods and materials: One hundred and twelve sets of study models with a range of malocclusions and various degrees of crowding were selected. Occlusal features were measured manually with digital callipers on the plaster models.