Fig. 2: The kinematics of a typical AF-bite. | BDJ Open

Fig. 2: The kinematics of a typical AF-bite.

From: The reciprocal jaw-muscle reflexes elicited by anterior- and back-tooth-contacts—a perspective to explain the control of the masticatory muscles

Fig. 2

Succession of screenshots of a T-Scan movie demonstrate the development of occlusal contacts of the upper dental arch from timepoint tZ until tS. For each tooth the percentage of the bite force of that timepoint is indicated. The left panel depicts the timepoint tZ, the starting point (0 ms) of accumulation of occlusion contacts. The total bite force is 0.2% mFpr, of which 100% is subjected to the left central incisor. The ANT/BAT ratio of force distribution is 100/0. The middle panel is a snapshot taken 53 ms later, at the timepoint tW. The total bite force is 2.0 % of the mFpr. All the ANT-contacts together bear 92.8% of the mFpr, whereas the rest, 7.2% of the bite force is subjected to the BAT, the left first premolar. The left BAT and the multiple contacts of the ANT area (encircled) form an ANT-BAT-axis allowing for a contralateral tilt of mandible only. The right panel, at timepoint 102 ms after the first contact of the occlusion process, depicts the “triangle of support” -concept. The occlusal contact forces are distributed to the left BAT, ANT and the right BAT compartments of the dental arch. The bite force is 6.1 % mFpr. The ANT/BAT ratio is 91.3/8.7.

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