Picture 1. Create new polygons according to the picture.
Create 8 new polygons by copying edges and place them according to picture 1. Remember to use Editable Poly's Target Weld when necessary.
Picture 2. Create 6 new polygons to the jaw.
Create 6 new polygons by copying edges and place them according to picture 2. Like you notice the location of the polygons doesn't exactly follow the profile in the reference picture. The less polygons there are in the model, the more the form must be exaggerated.
In this tutorial the goal is to use as little polygons as possible but still to create reasonably realistic head. Remember that the final surface is formed only when the Meshsmooth modifier is turned on. You should try the effect of the Meshsmooth modifier every now and then.
Picture 3. Create new polygons according to the picture.
Create new polygons by copying edges and place them according to picture 3. Remember to use Editable Poly's Target Weld when necessary.
Picture 4. Create new polygons and finalize the face.
Fill the hole in the face by creating new polygons according to picture 4. Now the face is complete and it should look approximately like in picture 4. This is a good stage to fix characteristics of the face if necessary. Next you will model the back of the head, the neck and the ear.
Picture 5. Polygons in the lower part of the jaw.
Create 10 new four sided polygons to the lower part of the jaw and place them according to picture 5.
Page 6: Modeling a head and a neck in 3DS MAX