Evaluation of the Outcomes of Coronectomy Procedure versus Surgical Extraction of Lower Third Molars Which Have a High Risk for Inferior Alveolar Nerve Injury: A Systematic Review

Table 2

Summarized data of the nerve injuries in the 7 included studies.

Authors and year	Study design	Success or failure of coronectomy	IANI in extractions	IANI in successful coronectomy	IANI in failed coronectomy	LNI
Renton et al., 2005	RCT	S: 58 (61.7%); F: 36 (38.3%)	19 (18.6%)	0%	t-IANI: 3 (8%) (mean 3 weeks)	0%
		E: NA	t-IANI: 17 (16.66%)			0%
			p-IANI (˃ 6 months): 2 (1.96%)
Hatano et al., 2009	CCT	S = 97 (95%)	6 (5.08%)	t-IANI: 1 (0.98%)	0%	0%
		F = 5 (4.9%)	t-IANI: 3 (2.54%)
			p-IANI: 3 (2.54%)
Leung and Cheung, 2009	RCT	S: 155 (90.6%)	9 (5.1%) t-IANI: 6 (3.37%)	t-IANI: 1 (0.6%)	t-IANI: 1 (6.25%; 1/16)	0%
		F: 16 (9.4%)	p-IANI 3 (1.68%)
Cilasun et al., 2011	CCT	S = 86 (97.7%)	t-IANI: 2 (2.29%)	0%	0%	0%
		F = 2 (2.3%)
Singh et al., 2018	RCT	S = 15 (100%)	0%	0%	0%	0%
		F = 0
Kang et al., 2019	CCT	S: 46 (83.63%)	6(10.91%) t-IANI: 4 (7.27%)	0%	0%	NA
		F: 9 (16.36%)	p-IANI: 2 (3.63%)
Yan et al., 2020	CCT	S: 91 (97.84%); F: 2 (2.16%)	NA	t-IANI: 2 (2.20%)	NA	C: 0%
						E: 1 (2.04%)

RCT: randomized clinical trial; CCT: controlled clinical trial; C: coronectomy; E: extraction; S: success; F: failure; t-IANI: transient inferior alveolar nerve injury; p-IANI: permanent inferior alveolar nerve injury; LNI: lingual nerve injury.