Abstract
The mechanism and movement of Gysi Simplex OU articulator was clarified in our previous study. This articulator has optional incisal guide tables with lateral wings.
The movements of the articulator with four different angles of lateral wings were measured with Kyushu University 3-D Movement Analyzing System. The results were as follows:
1. The rotational points existed when the incisal guide tables with the lateral wings were used.
2. Lateral rotational axes were constructed by joining three rotational points at three different heights.
3. As the incisal inclination became steeper, the rotational point was located more anterolaterally at the height of the condyle guide pin, and was located more anteromedially at the height of the occlusal plane and incisal guide pin.
4. As the incisal inclination became steeper, the axes changed from convergent axes to divergent axes.
