Additive versus subtractive manufactured interim implantsupported restorations in terms of clinical, aesthetic, patient-reported outcomes as well as cost- and timeefficiency: a randomized clinical trial “Additive vs subtractive interim”

Additive versus subtractive manufactured interim implantsupported restorations in terms of clinical, aesthetic, patient-reported outcomes as well as cost- and timeefficiency: a randomized clinical trial “Additive vs subtractive interim” - Am vs SM

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00029049

Enrollment

Registered

2022-05-20

Start date

2022-10-19

Completion date

Unknown

Last updated

2025-04-07

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

Conditions

Patients requiring at least one implant-supported interim restoration on an existing dental implant.

Interventions

Group 1: Additively manufactured interim implant crown (AM) Group 2: Subtractive manufactured interim implant crown (SM)

Eligibility

Sex/Gender

All

Age

20 Years to No maximum

Inclusion criteria

Inclusion criteria: - Signed Informed Consent Form - = 20 years of age - In need of at least one interim implant-supported restoration on an existing dental implant - Presence of at least one adjacent tooth at the implant site - Adequate oral hygiene - Capability to comply with the study procedures

Exclusion criteria

Exclusion criteria: - Pregnant or lactating women - Systemic or local conditions presenting a contraindication to implant treatment - Known or suspected non-compliance, drug or alcohol abuse - Severe periodontal disease

Design outcomes

Primary

Measure	Time frame
Total mean time for chairside adjustment (min) at interim implant-supported restoration delivery	—

Secondary

Measure	Time frame
- Clinical outcomes: probing pocket depth (PD), bleeding on probing (BoP) and plaque control record (PCR) - Esthetic outcomes: Pink esthetic score (PES), White esthetic score (WES) - Technical outcomes according to the modified United States Public Health Survey criteria - Patient-reported outcomes by VAS scale rated by the patients - Costs - Efficiency (time) - Perceived difficulty/ease of use rated by dentists evaluated using VAS scale - Adverse events	—

Measure

Time frame

- Clinical outcomes: probing pocket depth (PD), bleeding on probing (BoP) and plaque control record (PCR) - Esthetic outcomes: Pink esthetic score (PES), White esthetic score (WES) - Technical outcomes according to the modified United States Public Health Survey criteria - Patient-reported outcomes by VAS scale rated by the patients - Costs - Efficiency (time) - Perceived difficulty/ease of use rated by dentists evaluated using VAS scale - Adverse events

—

Countries

Switzerland

Contacts

Public ContactAlexis Ioannidis

Zentrum für Zahnmedizin, Klinik für Rekonstruktive Zahnmedizin

alexis.ioannidis@zzm.uzh.ch0041 44 634 04 04

Outcome results

None listed

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