Table 1.

General characteristics of included studies.

Author and year	Study design	Number of patients	Age	Gender	Type of Surgery in which nerve injury occurred	Side	Injured nerve	Time elapsed from injury to intervention
Renato Pol,2016	RCT	19	Mean age 37	4 male, 15 females	Third molar, Implant, Cystectomy	No report	Inferior alveolar nerve	>6 months
Tuncer Ozen, 2006	case series	4	21–24	4 female	Third molar	Right, left	Inferior alveolar nerve	>1 year
SHELLEY M. KHULLAR,1996	RCT	13	35	4 men, 9women	Mandibular sagittal split osteotomy, surgical removal of impacted wisdom teeth and mandibular fracture	Bilateral and unilateral	Inferior alveolar nerve	>6 months
SHELLEY M. KHULLAR,1996	RCT	13	range of 20–55 years (mean, 35.7 years)	(4 men and 9 women)	Mandibular sagittal split osteotomy	Bilateral and unilateral	Inferior alveolar nerve	>2 years
PETER G,1984	Case series	3	Mean 42	2 women, 1 man	Third molar, root canal treatment, tongue overgrowth	Variation	Lingual nerve	Variation
Hillerup S,2008	Cohort	48	Median 41	40 females, 12 males	Third molar, root canal treatment, implant	Left side, bilateral	Inferior alveolar nerve	>6 months