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Table 1 Summarized data of the 10 studies included in the review

From: Coronectomy as a surgical approach to impacted mandibular third molars: a systematic review

Study

Study design

Sample size (n)

Sex and age (range or mean or mean ± SD)

Teeth (n)

Adjunct pharmacological treatments

Surgical success or failure [n(%)]

IANI [n(%)]

LNI [n(%)]

Adverse effects [n(%)]

Pulp disease [n(%)]

Root migration [n(%)] and/or (mm and timepoint)

Reoperation [n(%)]

Follow-up (range or mean ± SD)

Clinical implications

O’Riordan et al. [22]

RS

52

31 yrs*

95

Antibiotics

S: 87 (91.6%)

t-IANI: 3 (3.4%)

t-LNI: 1 (1.1%)

I: 3 (3.4%)

No

NA

3 (3.4%)

24 months*

Effective alternative to extraction

F: 8 (8.4%)

Progrel et al. [14]

PCS

41

NA

50

Preoperative antibiotics

S: 50 (100%)

No

t-LNI: 1 (2%)

NA

NA

15 (30%) 2–3 mm in 6 months

3 (6%)

22 months

Effective alternative to extraction

F: 0 (0%)

Renton et al. [7]

RCT

128

M 30; F 64

94

Preoperative Chlorhexidine mouth washes

S: 58 (61.7%)

No

No

P: 8 (13.8%)

No

5 (13.2%) 2 mm in 12 months

No

25 ± 13 months

Low risk of complications than extraction

I: 3 (5.2%)

DSI: 7 (12%)

28.2 ± 5.9 yrs*

F: 36 (38.3%)

t-IANI: 3 (8%)

No

P: 4 (11.1%)

/

/

/

DSI: 4 (11,1%)

Dolanmaz et al. [25]

PCS

43

M 23; F 20

47

Antibiotics

S: 46 (97.9%)

p-IANI: 1 (2.2%)

NA

NA

No

3.4 mm in 6 months

No

9.3 months

Effective alternative to extraction

18–38 yrs

F: 1 (2.1%)

3.8 mm in 12 months

4 mm in 24 months

Hatano et al. [16]

CCT

107*

M 27; F 75

107*

NA

S: 102 (95,3%)

t-IANI: 1 (1%)

No

P: 19 (18.6%)

NA

87 (85.3%)

5 (4.9%)

13.5 ± 14.8 months

Low risk of complications than extraction

32.4 ± 10.4 yrs

F: 0 (0%)*

DSI: 2 (2%)

I: 1 (1%)

Leung and Cheung [17]

RCT

171

M 70; F 101

171

Paracetamol and codein for 3 days

S: 155 (90.6%)

t-IANI: 1 (0.6%)

No

P: 65 (41.9%)

No

96 (62.2%) 1.9 mm in 3 months

1 (0.6%)

10.6 ± 7.7 months

Low risk of complications than extraction

I: 9 (5.8%)

36 (23.6%) 3 mm in 6 months

3 (2%) 3.1 mm in 24 months*

27.2 ± 7.3 yrs

F: 16 (9.4%)

t-IANI: 1 (6.2%)

No

NA

/

/

/

11.4 ± 7.9 months

Cilasun et al. [24]

CCT

88

27.2 yrs

88

Antibiotics Benzydamine HCL plus Chlorhexidine gluconate for 5 days

S: 86 (97.7%)

No

NA

P: 1 (1.1%)

No

NA

1 (1.2%)

17 months

Effective alternative to extraction

I: 1 (1.1%)

F: 2 (2.3%)

No

NA

No

/

/

/

Goto et al. [61]

PCS

101

M 79; F 37

116

NA

S: 116 (100%)

No

No

DSI: 7 (6%)

1 (0.9%)

3 mm in 12 months

8 (6.9%)

12 months

Safety technique in 12 months

33 yrs*

F: 0 (0%)

Monaco et al. [59]

PCS

37

M 17; F 20

43

Antibiotics for 4 days Chlorhexidine for 10 days Ibuprofen

S: 43 (100%)

No

No

P: 1 (2%)

NA

1.6 mm in 3 months

1 (2.3%)

12 months

Effective alternative to extraction

31 ± 2 yrs

F: 0 (0%)

SW: 2 (4.6%)

2 mm in 6 months

DSI: 1 (2%)

2 mm in 12 months

Patel et al. [60]

RS

21

M 10; F 11

21

Antibiotics

S: 20 (95.2%)

t-IANI: 2 (9.5%)

NA

I: 2 (9.5%)

NA

9 (43%)

1 (5%)

2-40 months

Effective alternative to extraction

41.3 yrs

F: 0 (0%)

p-IANI: 1 (4.8%)

DSI: 1 (4.8%)

  1. CCT: controlled clinical trial; DSI: dry socket infection; F: female (in age and sex column) or failed coronectomy (in surgical success or failure column); I: infection rate; p-IANI: permanent inferior alveolar nerve injury; t-IANI: transient inferior alveolar nerve injury; p-LNI: permanent lingual nerve injury; t-LNI: transient lingual nerve injury; M: male; NA: not available; P: pain; PCS: prospective cohort study; RCT: randomized clinical trial; RS: retrospective study; S: success coronectomy; SW: swelling; SD: standard deviation; /: not applicable; *: value derived from graphs or text of the study.