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Table 1 Descriptive statistics of the crest, apex, and angular 3D implant deviation for each of the subgroups: alveolar ridge morphology, procedure, and implant system

From: Accuracy of keyless vs drill-key implant systems for static computer-assisted implant surgery using two guide-hole designs compared to freehand implant placement: an in vitro study

Alveolar ridge morphology

Procedure

Implant system

Mean

SD

Min

Q1

Median

Q3

Max

3D deviation crest (mm)

 Healed ridge

FH

ST

0.72

0.26

0.37

0.53

0.70

0.77

1.13

 Healed ridge

MS

ST

0.43

0.16

0.20

0.30

0.39

0.55

0.69

 Healed ridge

SL

ST

0.36

0.21

0.17

0.21

0.30

0.52

0.78

 Healed ridge

FH

TH

0.74

0.33

0.32

0.62

0.67

0.79

1.47

 Healed ridge

MS

TH

0.35

0.19

0.06

0.17

0.40

0.51

0.53

 Healed ridge

SL

TH

0.34

0.16

0.16

0.21

0.33

0.38

0.69

 Extraction socket

FH

ST

0.99

0.27

0.52

0.84

1.01

1.18

1.45

 Extraction socket

MS

ST

0.88

0.27

0.41

0.74

0.84

1.15

1.23

 Extraction socket

SL

ST

0.77

0.25

0.41

0.60

0.72

0.97

1.12

 Extraction socket

FH

TH

0.88

0.38

0.32

0.62

0.98

1.10

1.43

 Extraction socket

MS

TH

0.76

0.31

0.30

0.49

0.78

1.00

1.26

 Extraction socket

SL

TH

0.74

0.25

0.50

0.57

0.71

0.80

1.29

3D deviation apex (mm)

 Healed ridge

FH

ST

1.32

0.77

0.30

0.91

1.15

1.28

2.81

 Healed ridge

MS

ST

0.80

0.24

0.43

0.74

0.87

0.98

1.12

 Healed ridge

SL

ST

0.63

0.33

0.24

0.44

0.50

0.84

1.13

 Healed ridge

FH

TH

1.29

0.71

0.66

0.81

1.10

1.35

2.81

 Healed ridge

MS

TH

0.78

0.28

0.26

0.74

0.81

0.88

1.17

 Healed ridge

SL

TH

0.57

0.25

0.24

0.40

0.49

0.68

0.95

 Extraction socket

FH

ST

1.81

0.32

1.43

1.56

1.81

1.90

2.43

 Extraction socket

MS

ST

2.01

0.55

1.09

1.68

2.13

2.32

2.69

 Extraction socket

SL

ST

1.53

0.45

0.72

1.32

1.62

1.81

2.12

 Extraction socket

FH

TH

1.62

0.46

0.87

1.36

1.43

1.95

2.29

 Extraction socket

MS

TH

1.43

0.62

0.29

1.44

1.53

1.72

2.43

 Extraction socket

SL

TH

1.43

0.20

1.18

1.28

1.40

1.47

1.77

Angular deviation (°)

 Healed ridge

FH

ST

3.83

2.33

1.10

1.90

3.30

4.80

8.20

 Healed ridge

MS

ST

2.10

0.77

0.80

1.40

2.10

2.90

3.00

 Healed ridge

SL

ST

1.63

1.05

0.00

1.20

1.40

2.60

3.00

 Healed ridge

FH

TH

3.52

2.41

0.50

2.40

2.70

4.80

7.60

 Healed ridge

MS

TH

2.19

0.80

1.30

1.70

1.80

3.20

3.20

 Healed ridge

SL

TH

1.39

0.70

0.40

1.00

1.20

2.10

2.50

 Extraction socket

FH

ST

4.52

1.70

2.50

3.10

3.80

5.70

7.00

 Extraction socket

MS

ST

4.77

1.11

3.00

4.20

4.80

5.60

6.20

 Extraction socket

SL

ST

4.00

1.38

1.20

3.70

4.20

4.80

5.70

 Extraction socket

FH

TH

4.38

0.93

2.90

3.80

4.60

5.20

5.40

 Extraction socket

MS

TH

3.54

2.04

0.50

2.90

3.30

4.40

7.50

 Extraction socket

SL

TH

3.39

1.28

1.80

2.80

3.30

3.70

5.90

  1. FH free-handed, MS manufacturer’s sleeve, SL sleeveless
  2. ST: bone level 4.1 × 12 mm, RC, Straumann AG; Basel, Switzerland TH: element MC 4 × 12.5 mm Thommen SPI; Grenchen: Switzerland