Table 1. List of all the included studies with the year of publication and reported incidences (%) of temporary or permanent injuries to the inferior alveolar nerve related to the type of intervention (LF+/LF).

No.	First author	Year	Technique	Temporary LNI (%)	Permanent LNI (%)
Abbreviations: LF, lingual flap; LNI, lingual nerve injury.
1	Shad	2015	LF+	8.94	0
			LF	2.63	0.5
2	Jerjes	2010	LF	1.8	1.6
3	Jerjes	2006	LF	6.5	1
4	Pogrel	2004	LF+	1.6	0
5	Malden	2002	LF+	0.4	0
6	Gargallo-Albiol	2000	LF+	2.11	0
			LF	0.63	0
7	Robinson	1999	LF+	3.33	0
			LF	0.9	0
8	Appiah-Anane	1997	LF	0.2	0
9	Chiapasco	1996	LF+	0.05	0
10	Robinson	1996	LF+	6.9	0.8
			LF	0.9	0.3
11	Walters	1995	LF+	0.5	0