Up to 12-year clinical evaluation of CONELOG® Screw-Line implants with 7 mm length: a prospective randomized double-blinded clinical study

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00039064

Enrollment

Registered

2026-02-10

Start date

2026-04-28

Completion date

Unknown

Last updated

2026-06-01

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

Conditions

Patients with missing molars/second missing premolars in the lower jaw. Implant prosthetic restoration with short implants and ceramic crowns.

Interventions

Group 1: Patients in arm 1 received two short implants in the mandibular posterior region and two splinted ceramic crowns. The planned follow-up examination will take place once per patient between Fe

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: All patients who originally participated in the study and who, after receiving renewed information, have given their written consent to participate in the current follow-up examination will be included. Only adult patients who are capable of giving consent will be examined.

Exclusion criteria

Exclusion criteria: Not included are patients without consent, persons incapable of giving consent, pregnant women, persons with drug abuse or relevant psychological disorders, and persons who are institutionalized by court or official order.

Design outcomes

Primary

Measure	Time frame
The primary objective of the study is to evaluate the long-term performance of implant-supported ceramic single crowns on short CONELOG® Screw-Line implants with a length of 7 mm in the posterior mandible after 9–12 years of use. For this purpose, all patients in the original study will undergo a one-time dental examination between February and April 2026 (dental status, periodontal findings including probing depths, attachment loss, bleeding and plaque index; visual inspection of crowns; X-rays only if medically indicated).	—

Measure

Time frame

The primary objective of the study is to evaluate the long-term performance of implant-supported ceramic single crowns on short CONELOG® Screw-Line implants with a length of 7 mm in the posterior mandible after 9–12 years of use. For this purpose, all patients in the original study will undergo a one-time dental examination between February and April 2026 (dental status, periodontal findings including probing depths, attachment loss, bleeding and plaque index; visual inspection of crowns; X-rays only if medically indicated).

—

Secondary

Measure	Time frame
The secondary objective is to investigate implant survival and the occurrence of biological complications, in particular marginal peri-implant bone loss and peri-implantitis.	—

Countries

Germany

Contacts

Public ContactStefan Wolfart

Klinik für Zahnärztliche Prothetik und Biomaterialien, Zentrum für Implantologie, Uniklinik RWTH Aachen

swolfart@ukaachen.de+492418088241

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Jun 11, 2026