Can 3D scanning and digital production techniques improve the fit of a dental crown and reduce the time taken in patients who have a dental implant to replace an extracted molar or premolar?

Crown accuracy and time efficiency in posterior single implant treatment using immediate digital impression and split-file workflow: a randomized control trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN14838166

Enrollment

Registered

2020-01-25

Start date

2018-09-01

Completion date

Unknown

Last updated

2020-02-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Comparison of 3D scanning and conventional impressions for crown production in people receiving a dental implant to replace an extracted molar Oral Health

Interventions

Half of the patients are randomized into test group that receives Intra-oral scanning (IOS) immediately after implant placement and crown delivery four months later, while the other half are included

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Aged =18 years. 2. Missing single posterior premolar or first molar for at least 3 months. 3. Sufficient bone height and width at implant site (vertical bone height =10 mm, buccal-lingual bone width =6 mm) 4. Sufficient prosthetic space (Vertical height =5 mm, mesial-distal distance =6 mm)

Exclusion criteria

Exclusion criteria: 1. Local or systemic contraindication for implant therapy 2. Adjacent teeth or antagonistic teeth with mobility of Class II or Class III

Design outcomes

Primary

Measure	Time frame
3D deviation analysis between pre and post files	—

Secondary

Measure	Time frame
Total chair-side time for each workflow was recorded in minutes by an independent investigator for both workflows	—

Countries

China

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026