What is Overclosure of the mouth?

Overclosure is where the lower jaw and upper jaw come together too far creating pouching at the sides of the mouth and giving the face a more collapsed appearance. This pouched area becomes a breeding ground for bacteria and fungus.

How is VDO calculated?

The distance between Stn to Stsn clinically (VDO clinically) can be calculated by using the formula X1/X2 = Y1/Y2; X1 = Y1/Y2 × X2, where X1 is the distance between Stsn and Stgn and X2 is the distance between Stn and Stsn clinically, whereas Y1 is the distance between Stsn and Stgn, Y2 is the distance between Stn and …

Can a collapsed jaw be fixed?

Bite collapse can be treated with dental surgical facelifts that make the face look more proportionately balanced, reduce wrinkles, and alleviate the defective bite. This treatment not only reverses the signs of aging but also structurally augments facial support and corrects the position of the jaw.

What happens when you remove an initial overclosure?

In subsequent steps any nodal adjustments to remove initial overclosures cause strains that often cause severe mesh distortions because the entire nodal adjustments occur in a single, very brief increment. This is especially true when the kinematic constraint method is used.

How to adjust initial overclosures of contacting surfaces?

You can also specify tolerance for adjustment zone. In this case, all slave nodes within the tolerance of the master surface will be moved on the master surface strain free; both nodes with an initial overclosure and nodes with an initial gap. The last option is adjust slave nodes in set:.

How does initial contact overclosure Abaqus / Explicit work?

Initial contact overclosure Abaqus/Explicitwill automatically adjust the undeformed coordinates of nodes on contact surfaces to remove any initial overclosures. When using the balanced master-slave approach, both surfaces are adjusted; when using the pure master-slave approach, only the slave surface is adjusted.

What causes the initial strain of an overclosure?

Displacements associated with adjusting the surface to remove overclosures do not cause any initial strain or stress for contact defined in the first step of the analysis. When conflicting constraints exist, initial overclosures may not be completely resolved by repositioning nodes.