Correlation between radiographic signs of third molar proximity with inferior alveolar nerve and postoperative occurrence of neurosensory disorders: A prospective, double-blind study

Abstract

PURPOSE:To evaluate the interference of radiographic factors in the appearance of sensory deficit related to inferior alveolar nerve (IAN) after third molars (3Ms) removal. METHODS:A prospective, double-blind, observational, unicentric study was performed with 126 patients submitted to a surgical procedure of lower 3Ms removal in the period from March to October/2011. Collected data included gender, age, eruption stage of 3Ms, position/angle of 3Ms (Pell-Gregory and Winter classifications, respectively), presence/absence of radiographic signs of 3Ms proximity with the inferior alveolar canal and surgical technique. Occurrence evaluation of the IAN injury was performed on the seventh postoperative day through pin-prick, two-point discrimination and brush directional stroke tests. RESULTS:Predominant radiographic signs were: narrowing of the inferior alveolar canal (68.25%), darkening of root (46.82%) and diversion of the canal (31%). None of the patients presented sensory loss. Sixty-one (48.41%) of the cases had at least one or two radiographic signs of proximity with NAI. Forty-seven (37.3%) had 3 or more signs, and 18 (14.29%) did not have any radiographic signs of proximity to mandibular canal. CONCLUSION:There was not a positive correlation between presence of radiographic signs of 3Ms with IAN proximity and postoperative neurosensory disorders occurrence.

Anatomical study of the relationship of impacted mandibular third molar root apex to inferior alveolar canal in Kurdistan population using orthopantomogram

“…In contrast, some studies found that the most common impaction level was Class B, 22,23,27,28 while other studies reported Class A as the predominant impaction level. 18,29,30 This can be explained by the difference in classification methods according to the position of the cementoenamel junction in Discussion tooth are seen in Table 6.…”

“…Hazza'a et al 21 found that the greater number of impacted mandibular third molar was seen within the age group 20-25 years. Costa et al 22 found that the greater number of impacted mandibular third molar was seen within the age group 21-25 years. For this reason, the age of the patients selected was between 20-25 years.…”

Panoramic Radiographic Assessment of Status of Impacted Mandibular Third Molars: A Tertiary Care Centre Based Study in Eastern Nepal

“…2,13,15,16 In addition, there are few studies, which have found that level B eruption was the most prevalent. 1,17,18,14 Inconsistent to these findings, the study by Topkara and Sari 18 found that level A eruption was the least prevalent among the impacted M3Ms and the study by Jung and Cho 19 showed that level C was the most prevalent in patients aged over 40.…”

“…Few studies have got similar findings. 12,17 On the other hand, many studies have found that the most prevalent angulation is mesioangular. [1][2][3][20][21][22][23] Similarly, the systematic review by Carter and Worthington 24 also concluded that the most prevalent angulation is mesioangular and the least prevalent is horizontal.…”

Assessment of the relationship between mandibular molars and inferior alveolar nerve–diagnostic significance and accuracy of panoramic radiography

“…(11,14) According to the literature a large percentage of surgeons recommend computer tomography (CT) as the best diagnostic method to determine the relationship of the mandibular molars to the mandibular canal. However, this method is not always used because of its high price and radiation load (14).…”