It is not well in chins of very deficient type to attempt to make the anterior contour as it should be in the first sitting. Too much pressure would be required, and unless the skin was freely movable considerable reactive inflammation would result, with possible necrosis of the skin in part and consequent expulsion of the injected mass.
The anterior line of such chins should be rebuilt in several sittings, always waiting for the parts to become normal in appearance and sensitiveness.
This method helps to stretch the skin, allowing of further injections and the introductions of a greater quantity than could be introduced at one time only.
The author advocates making two or three sittings of the anterior restoration of contour and two for each angle.
The angles of the chin are injected at a point about midway between the mental process and beginning of external oblique line. The mass is injected as near the inferior ridge as possible, and somewhat above the attachment of the platysma myoides muscle.
Fig. 304. Fig. 305.
Frontal View, showing Correction of Antero-lateral Deficiency about Chin; also Correction of Deficiency of Cheeks.