Table 3. Methodological quality scores of CT studies with an overall quality score of ≥60%.

First author	Year	Topic	Study design							Measure			Statistics					Score
			A	B	C	D	E	F	G	H	I	J	K	L	M	N	O
Ras	1997	sagittal position maxilla			o			o	.		.		.				o	75%
Van der Meij	2001	bone graft quantity			o			o	.		.				o		o	69%
Kawakami	2003	bone graft height, density		o	o			o	.		.						o	69%
Van der Meij	2003	bone graft			o			o	.		.	o						77%
Kita	2004	need bone graft			o			o	.		.	o						77%
Schliephake	2006	maxillary arch width			o			o	.		.	o			o		o	62%
Kim	2008	bone graft size, volume		o	o				.		.						o	77%
Suri	2008	midface, maxilla		o	o			o	.		.		.				o	66%
Alonso	2010	bone graft size, volume		o	o	o											o	73%
Saijo	2010	ossification pal suture			o			o	.		.	o	.		.		.	70%
Lee	2011	pterygomaxillary region		o	o			o	.		o		.				o	62%
Li	2011	maxilla			o			o	.		.		.				o	75%
Tulunoglu	2011	cephalometry 2d vs 3D		o	o			o	.		.		.		.		o	63%
Choi	2012	ossification pal suture			o			o	.		.	o	.				o	67%
Seike	2012	bone graft size, density			o		.	o	.		.	o	.		.		o	60%
Ye	2012	palatal shelf elevation			o			o	.		.				o		o	69%

 = Fulfilled satisfactorily the methodological criteria;

o = Did not fulfill the methodological criteria;

. = Not applicable.