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Table 2 Frequency distribution of labial bone perforation of investigated teeth in the anterior mandibular region

From: Risk assessment of labial bone perforation in the anterior mandibular region: a virtual immediate implant placement study

 

Perforation

Non-perforation

 

Variables

n

%

n

%

p

Total

193

21.6

701

78.4

 

Side

    

0.464

 Right

101

22.6

346

77.4

 

 Left

92

20.6

355

79.4

 

Tooth type

    

< 0.001

 Central incisor

63

21.1

235

78.9

 

 Lateral incisor

45

15.1

253

84.9

 

 Canine

85

28.5

213

71.5

 

Side and tooth type

    

0.002

 Central incisor, right

38

25.5

111

74.5

 

 Central incisor, left

25

16.8

124

83.2

 

 Lateral incisor, right

21

14.1

128

85.9

 

 Lateral incisor, left

24

16.1

125

83.9

 

 Canine, right

42

28.2

107

71.8

 

 Canine, left

43

28.9

106

71.1

 

Tooth-alveolar ridge (CRDAP)

    

< 0.001*

 CRDAP class I

3

3.1

94

96.9

 

 CRDAP class II

49

29.2

119

70.8

 

 CRDAP class III

0

0.0

93

100.0

 

 CRDAP class IV

141

26.3

395

73.7

 
  1. The classification of crestal and radicular dentoalveolar phenotype (CRDAP) of mandibular anterior teeth was categorized according to the thickness of dentoalveolar bone at both crestal and radicular zones [25]. The “perforation” was defined as the virtual implant extruded out of the apical outline of the labial cortical bone, whereas “non-perforation” was defined as the virtual implant within outline of the labial cortical bone. The chi-square tests were used for examining the frequency distribution of labial bone perforation (“perforation” vs. “non-perforation”) in different “sides,” “tooth types,” and “side and tooth types,” respectively. *The Fisher’s exact test was used to examine the frequency distribution of labial bone perforation (“perforation” vs. “non-perforation”) in different “tooth-alveolar ridge (CRDAPs).” The level of statistical significance was set at p < 0.05