Table 1.

The average gain of the grafting procedures in different areas.

Type of Surgery	Lefort 1 one-step procedure (IOSP)				Lefort 1 two-step procedure (ITSP)				Sinus lift		Onlay grafting
Bone Area	Molar		Canine		Molar		Canine
Bone Quantity	Height	Thick ness	Height	Thick ness	Height	Thick ness	Height	Thick ness	Height	Thick ness	Height	Thick ness
Before Surgery (mm)	3	4	6	3	4	2.5	5	2.5	3	3	4	2
After Surgery (mm)	15	10	12	11	14	13.5	12	10.5	9.5	10	10	7

This table give the bone increment in different areas.