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Table 4 Multiple logistic regression analysis of variables contributing to labial bone perforation during virtual implant placement

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

  Model 1 (n = 894) Model 2 (n = 894) Model 3 (n = 894) Model 4 (n = 801)
Variables OR*, ** 95% CI Adjusted OR 95% CI Adjusted OR 95% CI Adjusted OR 95% CI
Tooth
 Central incisor Referent   Referent   Referent   Referent  
 Lateral incisor 0.66** 0.49–0.90 0.66** 0.48–0.90 0.41** 0.24–0.73 0.29** 0.16–0.53
 Canine 1.49* 1.08–2.06 1.50* 1.08–2.08 11.67** 5.27–25.85 6.31** 2.85–13.97
Alveolar ridge
 Concavity depth (CD) 1.47** 1.27–1.70 1.49** 1.29–1.72 1.56** 1.26–1.94 1.85** 1.47–2.32
 Cavity angle (CA) 0.90** 0.87–0.93 0.89** 0.86–0.92 0.85** 0.80–0.90 0.84** 0.79–0.89
Deep bone thickness
 dBT (0) 0.59** 0.51–0.67 0.58** 0.50–0.66 0.43** 0.34–0.55 0.46** 0.36–0.58
 dBT (10) 0.68** 0.59–0.78 0.68** 0.59–0.77 1.03 0.84–1.28 1.03 0.81–1.31
Tooth-alveolar ridge
 Torque (T) 1.10** 1.06–1.14 1.10** 1.07–1.14 1.25** 1.18–1.34 1.28** 1.21–1.36
CRDAP classification
 CRDAP class I Referent  
 CRDAP class II 21.39** 3.04–150.23
 CRDAP class III
 CRDAP class IV - 47.26** 7.00–319.22
  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]. A multivariable logistic regression analysis with generalized estimating equation (GEEs) method was used and which was simultaneously adjusted for categorical (i.e., gender, tooth types, and crestal and radicular dentoalveolar phenotype (CRDAP)) and continuous (i.e., age, cavity depth (CD), cavity angle (CA), torque (T), and deep bone thickness (dBT) variables. * and ** indicate statistical differences as p < 0.05, p < 0.01
  2. Model 1: adjusted for within factors
  3. Model 2: adjusted for within factors, gender and age
  4. Model 3: adjusted for within factors, gender, age, tooth types, CD, CA, T, dBT (0), and dBT (10)
  5. Model 4: adjusted for within factors, gender, age, tooth types, CD, CA, T, dBT (0), dBT (10), and CRDAP (CRDAP class III teeth were excluded due to no “perforation” teeth in this group).
  6. Abbreviation: OR odds ratio, 95% CI 95% confidence interval