Table 4. Outcome measures of group B (studies focused on impacted teeth).

First author	Year	Number of patients	Number of canines	Number and type of examiners	Reference standard	Index test	Occasions (interval)
2D X-ray versus MSCT
Bjerklin K [22]	2006	80	113	1 ortho	Intraoral X-rays+OPT+LHP (some cases)	MSCT	2 (>10–12 months)
Bjerklin K [23]	2008	3		157 ortho	OPT+intraoral periapical	MSCT (2 of the three cases)	?
2D X-ray versus CBCT
Haney E [24]	2010	18	25	7 (4 ortho; 3 surg)	OPT+occlusal+2 periapicals	CBCT	1
Botticelli S [25]	2011	27	39	8 (5 pgs; 3 ortho)	OPT+LHP+periapical	CBCT	?
Wriedt S [26]	2012	21	29	26 (10 ortho; 8 surg; 8 dent)	dental casts and OPG	dental casts and CBCT	2 (>2 weeks)

ortho = orthodontist(s); pgs = postgraduate(s); dent = dentist(s); surg = dental surgeon; LHP = lateral headplate; OPT = orthopantomogram; CT = computer tomography; CBCT = cone beam computed tomography; MSCT = multi-slice computed tomography; 2D = two-dimensional.