Abstract An investigation of occlusal stability of teeth after occlusal adjustment was conducted. The eight patients who participated in this study presented occlusal prematurities and interferences (interceptive and deflective contacts) which were eliminated by selective grinding according to the principle of obtaining and maintaining occlusal stability. To measure changes in occlusal stability, reference points were scribed on the teeth; base-line, 45 day, and 90 day serial stone casts were obtained. Each cast had one point on each tooth involved in the occlusal adjustment (tooth point) and one or two different teeth not involved in the grinding procedure (reference points). Each cast was photographed from two camera positions. The stereopairs thus obtained were placed on the stage of a Mann comparator to determine X and Y coordinates. The Z coordinates were mathematically computed. Likewise, the measurements of the distances from reference points to tooth points were determined by means of analytical photogrammetry. The statistical analysis disclosed that the mean differences between the base-line and 45 day measurements and between the base-line and 90 day measurements were not statistically significant.