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1.Baseline indexes
1.1.Inclusion criteria

Intact hard and soft tissues, including treated teeth decay and healed teeth extraction socket

Yes

Volunteers from Shanghai Jiao Tong University School of Medicine

Yes

Good oral hygiene

Yes

Aged at least eighteen years

Yes

Complete maxillary dental arch except the missing third molar

Yes

1.2.Exclusion criteria

Undergoing orthodontic treatment

No

With metal crowns and any other metal materials on teeth

No

Advanced periodontitis affecting gingival recession

No

Obvious teeth mobility (mobility degree higher than 1)

No

Obvious dentition malalinement (malalinement degree higher than 1)

No

2.Data of upper jaws
2.1.Palatal vault height

Palatal vault height

21.397 mm

2.2.Arch width

Arch width

40.542 mm

3.Accuracy of digital impressions
3.1.Trueness of full dentition

Trueness of full dentition

0.08850 mm

3.2.Precision of full dentition

Precision of full dentition

0.06800 mm

3.3.Trueness of palatal soft tissues

Trueness of full dentition

0.18867 mm

3.4.Precision of palatal soft tissues

Precision of palatal soft tissues

0.07767 mm

4.Adaptation of major connectors
4.1.Group Digital Impression

Landmark L3

850.00 μm

Landmark M3

566.42 μm

Landmark R3

1025.48 μm

Landmark L2

614.33 μm

Landmark M2

335.90 μm

Landmark R2

769.42 μm

Landmark L1

218.09 μm

Landmark M1

317.75 μm

Landmark R1

284.27 μm

4.2.Group Conventional Impression

Landmark M1

100.51 μm

Landmark R1

94.62 μm

Landmark L3

300.64 μm

Landmark M3

1002.28 μm

Landmark R3

358.16 μm

Landmark L2

269.89 μm

Landmark M2

626.70 μm

Landmark R2

267.73 μm

Landmark L1

113.11 μm