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Table 5 Findings related to the amount and rate of maxillary molar intrusion

From: Assessment of the efficacy of various maxillary molar intrusion therapies: a systematic review

Study and treatment groups

Amount of maxillary molar intrusion

(mean (mm) ± SD)

Calculated rate of maxillary molar intrusion

(mean (mm)/month ± SD)

E1

E2

C

E1

E2

C

Torres et al. [31] (2006)

E1 (crib and HP chin cup): n = 30

C (no treatment): n = 30

0.88 ± 1.55*

–

0.26 ± 1.13

0.07 ± 0.13

–

0.02 ± 0.09

Doshi et al. [28] (2010)

E1(spring-loaded bite block): n = 10

E2 (magnetic bite block): n = 10

− 0.8 ± 0.3

− 1.1 ± 0.4

–

− 0.1 ± 0.04

− 0.14 ± 0.05

–

Akl et al. [26, 27] (2020)

E1 (400 g force): n = 10

E2 (200 g force): n = 10

− 2.37 ± 1.3

− 2.61 ± 1

–

− 0.4 ± 0.22

− 0.44 ± 0.16

–

Hasan et al. [29] (2021)

E1 (FPBB and LLLT): n = 14

E2 (FPBB): n = 14

C (no treatment): n = 14

− 1.21 ± 0.32

− 0.82 ± 0.37

0.32 ± 0.37

− 0.17 ± 0.05

− 0.09 ± 0.04

–

Abellan et al. [25] (2021)

E1 (PBM and TAD based mx molar intrusion): n = 10

E2 (TAD based mx molar intrusion): n = 10

− 2.31 ± 0.65

− 2.95 ± 1.16

–

− 0.42 ± 0.13

− 0.49 ± 0.17

–

Mousa et al. [30] (2021)

E1 (OBB): n = 20

E2 (RPBP/crib): n = 20

− 1.44 ± 0.6

− 1.11 ± 0.8

–

− 0.12 ± 0.05

− 0.09 ± 0.07

–

Hasan et al. [32] (2022)

E (RMI): n = 20C (no treatment): n = 20

− 2.90 ± 1.66

–

0.55 ± 1.93

− 0.32 ± 0.18

–

0.06 ± 0.21

  1. C, control; E, experimental; FPBB, fixed posterior bite plane; HP, high pull; mm, millimeter; OBB, open bite Bionator; PBM, photobiomodulation; RMI, rapid molar intruder; RPBP, removable posterior bite block; SD, standard deviation; TAD, temporary anchorage device; mx, maxillary; LLLT, low-level laser therapy
  2. *Positive value indicating molar extrusion