A new method to study the displacements of human teeth in three‐dimensional space is presented. This non‐invasive technique uses recent developments in the double‐exposure pulsed laser holography to measure the displacements of maxillary central incisors of the human with an accuracy of 0.05 μm. The incisor was loaded with a force of 300 grams in the lingual‐labial direction parallel to the occlusal plane. The holographically determined displacements at a point on a crown were then reduced to obtain the center of rotation and also to compute the displacements at the alveolar crestand the apex.

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The noninvasive, modern technique based on the method of double-exposure hologram interferometry was used to measure arbitrary displacements of teeth in the three dimensional space. The experimental studies were carried out on an idealized model of the maxillary central incisor. The results show that the experimental data, based on component loading, are inadequate to accurately predict tooth displacement from an arbitrary force acting in the three dimensional space.