The Role of Mandibular Third Molars on Lower Anterior Teeth Crowding and Relapse after Orthodontic Treatment: A Systematic Review

Table 2

Quality assessment of the studies.

Author	1	2	3	4	5	6
Shanley 1962 [12]	U	U	U	U	N/A	A
Sheneman 1969 [13]	U	U	U	U	U	U
Kaplan 1974 [14]	I	A	U	A	U	A
Lindqvist and Thilander 1982 [15]	A	A	U	I	U	A
Richardson 1982 [16]	I	I	U	I	U	A
Ades et al., 1990 [17]	I	I	A	A	U	A
van der Schoot et al., 1997 [6]	I	I	U	A	U	A
Harradine et al., 1998 [5]	A	A	A	A	A	A
Little 1999 [18]	I	I	U	I	U	U
Buschang and Shulman 2003 [19]	A	A	U	A	N/A	A
Niedzielska 2005 [2]	I	A	U	A	A	A
Sidlauskas and Trakiniene 2006 [3]	I	I	U	A	N/A	U

1: sequence generation and concealed allocation; 2: size and composition of the studied groups; 3: blinding of participants, clinicians, and investigators; 4: application of inclusion and exclusion criteria for subjects; 5: descriptions of loss to follow-up; 6: adequacy of statistical analysis; A: adequate; U: unclear; I: inadequate.