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Table 2 Individual biological and technical complications per group within the healing period of 3 months

From: Evaluation of the surgical and prosthetic success of All-on-4 restorations: a retrospective cohort study of provisional vs. definitive immediate restorations

  Total Study group
Group 1 (PR) Group 2 (DR)
Biological complications n 19 2 17
 Dehiscence n 1 1 0
 Temporary hypesthesia n 2 0 2
 Infection n 4 0 4
  Abscess (n) (3) (0) (3)
  Fistula (n) (1) (0) (1)
 Sharp bone edge n 1 0 1
 Secondary bleeding n 1 0 1
 Implant loss n 10 1 9
Technical complications n 14 6 8
 Chipping/fracture of composite teeth n 11 5 6
 Fracture prosthetic screw n 1 0 1
 Abutment loosening n 1 1 0
 Loss of the cover SC n 1 0 1
  1. PR provisional restoration, DR definite restoration, Loss of the cover SC loss of the resin cover of the screw channel