Which element of the Frenkel regulator stimulates sagittal growth of the jaws?

Which element of the Frenkel regulator stimulates sagittal growth of the jaws?

• A. Vestibular arc
• B. Labial pelots
• C. Cheek shells
• D. Palatine arc

Answer: (B)

Sagittal jaw growth is driven by retraining perioral muscles to change the functional forces acting on the jaws. The labial pelots are the component that provides a constant tactile stimulus to the lips, guiding the lips to rest in a forward, balanced position. This proprioceptive cue reduces unfavorable lip and cheek pressures and allows the tongue to function more effectively in a forward posture, promoting anterior growth of the jaws. The other elements mainly support the appliance and modify muscle activity in a broader sense, but the labial pelots give the direct stimulus that most strongly drives sagittal (forward) growth.

Sagittal jaw growth is driven by retraining perioral muscles to change the functional forces acting on the jaws. The labial pelots are the component that provides a constant tactile stimulus to the lips, guiding the lips to rest in a forward, balanced position. This proprioceptive cue reduces unfavorable lip and cheek pressures and allows the tongue to function more effectively in a forward posture, promoting anterior growth of the jaws. The other elements mainly support the appliance and modify muscle activity in a broader sense, but the labial pelots give the direct stimulus that most strongly drives sagittal (forward) growth.