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Table 5 Insertion torque values in participants with or without implant-root contact

From: Insertion torque recordings for the diagnosis of contact between orthodontic mini-implants and dental roots: a systematic review

Authors

Model

Insertion torque values compared for different subgroups

Motoyoshi et al. [6]

Human patients

58 self-drilling without root contact: 7.1 ± 3.4 Ncm

7 self-drilling 1 point contact: 8.7 ± 3.0 Ncm

5 self-drilling multiple contacts: 8.1 ± 2.3 Ncm

58 pre-drilling without root contact: 6.8 ± 2.3 Ncm

7 pre-drilling 1 point contact: 7.4 ± 1.3 Ncm

8 pre-drilling multiple contacts: 7.7 ± 2.1 Ncm

Chen et al. [84]

Mongrel dogs

25 pre-drilling without root contact 17.1 ± 5.9 Ncm

47 pre-drilling with root contact 19.9 ± 6.6 Ncm

Briscenoa [25]

Beagle dogs

23 self-drilling without root contact 23.8 ± 3.6 Ncm

23 self-drilling with root contact 50.7 ± 7.2 Ncm

Wilmes et al. (a) [33]

Mandibles of pig cadavers

147 pre-drilling without root contact: mean 16.6 ± 5.7 Ncm

50 pre-drilling with root contact: mean 18.5 ± 5.8 Ncm

Wilmes et al. (b) [33]

Mandibles of pig cadavers

147 pre-drilling without root contact: mean 16.6 ± 5.7 Ncm

108 pre-drilling with root penetration: mean 21.9 ± 5.6 Ncm

McEwan (a) [32]

Mandibles of pig cadavers

3M implants

10 self-drilling without root contact: mean 11.71 ± 0.9 Ncm

10 self-drilling with root contact: mean 17 ± 2.5 Ncm

10 self-drilling implants with root penetration were excluded because they did not further advance after root contact

McEwan (b) [32]

Mandibles of pig cadavers

Tomas implants

10 self-drilling without root contact: mean 8.76 ± 0.8 Ncm

7 self-drilling with root contact: mean 12.86 ± 1.2 cm

10 self-drilling implants with root penetration were excluded because they did not further advance after root contact

  1. Data obtained from the original manuscript are presented in black-type face print
  2. Data obtained through our contacting author protocol are italicized
  3. aThe reference author, Dr. PH Buschang, was contacted and reported that 23 implants were placed with root contact and 23 without. This information was inserted in Table 5, but does not completely explain what happened to 5 of the 56 inserted implants because in the original manuscript, only a loss of five (fractured) implants was reported