Does the addition of cone-beam CT to panoral imaging reduce inferior dental nerve injuries resulting from third molar surgery? A systematic review

Table 2 Included articles for review by location, sample size (number of mandibular third molars) and definition of high-risk relationship with the inferior dental nerve

Authors	Year	Location	Sample size (MTMs)	MTM risk criteria
Guerrero et al.	2012	Leuven, Belgium	86	Radiographic overlap of root over IDC but excluding high risk (e.g., loss of white lines of the IDC)
Guerrero et al.	2014	Leuven, Belgium & Lima, Peru	256	As 2012 study above
Ghaeminia et al.	2015	Three centres in the Netherlands	320	Radiographic overlap of root over at least half of IDC height
Badawy et al.	2016	Alexandria, Egypt	20	Horizontally impacted mandibular third molar class II position B*
Peterson et al.	2016	Copenhagen, Denmark	230	Radiographic contact with or overlap of root over IDC
Korkmaz et al.	2017	Trabzon, Turkey	139	One or more radiographic signs described by Rood & Shehab [3]**
Mabongo & Thekiso	2019	Witwatersrand, South Africa	93	“…panoramic signs that suggested close proximity between the tooth roots and the mandibular canal.“

MTM = Mandibular Third Molar, IDC = Inferior Dental Canal. *As described by Pell and Gregory [22]** (1) Loss of the white line of the IDC; (2) darkening of the roots; (3) narrowing of the IDC or roots; (4) dark and bifid roots; (5) deflected roots; (6) diversion of the IDC.

ISSN: 1472-6831