Clinical Study

Evaluation of Impacted Mandibular Third Molars by Panoramic Radiography

Table 6

Radiographic inferior alveolar canal relation-wise distribution of total right and left sides impacted mandibular third molars (True Relation and False Relation).

Inferior Alveolar Canal RelationGroup IGroup IIGroup IIITotal 2-valueGrand Total
𝑛 (%)
Right
𝑛 (%)
Left
𝑛 (%)
Right
𝑛 (%)
Left
𝑛 (%)
Right
𝑛 (%)
Left
𝑛 (%)
Right
𝑛 (%)
Left
𝑛 (%)

True Relation

Notching26 (2.63)29 (2.93)35 (3.54)22 (2.22)6 (0.60)6 (0.60)67
(6.78)
57
(5.76)
0.31
NS
𝑃 > . 0 5
124
(12.55)

Grooving15 (1.51)20 (2.02)7 (0.70)14 (1.41)5 (0.50)6 (0.60)27
(2.73)
40
(4.04)
0.72
NS
𝑃 > . 0 5
67
(6.78)

Perforation3 (0.30)3 (0.30)2 (0.20)5 (0.50)3 (0.30)4 (0.40)8
(0.80)
12
(1.21)
0.72
NS
𝑃 > . 0 5
20
(2.02)

Total true relations211
(21.35)

False Relation

Superimposed97 (9.81)105 (10.62)81 (8.19)99 (10.02)16 (1.61)15 (1.51)194 (19.63)219 (22.16)0.72
NS
𝑃 > . 0 5
413
(41.80)

Adjacent71 (7.18)76 (7.69)61 (6.17)51 (5.16)7 (0.70)9 (0.91)139 (14.06)136 (13.76)0.52
NS
𝑃 > . 0 5
275
(27.83)

None27 (2.73)21 (2.12)17 (1.72)20 (2.02)1 (0.10)3 (0.30)45
(4.55)
44
(4.45)
0.37
NS
𝑃 > . 0 5
89
(9.00)

Total false relations777
(78.64)

Total
𝑛 (%)
239 (24.19)254 (25.70)203 (20.54)211 (21.35)38 (3.84)43 (4.35)480 (48.58)508 (51.41)988
(100)

2-value12.49
𝑃 = . 0 0 1 9
S
𝑃 < . 0 5
6.99
𝑃 = . 0 3
S
𝑃 < . 0 5