Clinical outcome and implant survival after alternate surgery knee sled prosthesis on total knee endoprosthesis

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00021482

Enrollment

100

Registered

2020-07-20

Start date

2026-12-31

Completion date

Unknown

Last updated

2026-03-30

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

Conditions

M17.9 Z96.65

Interventions

Group 1: Patients who have undergone an alternating operation from UKA (unicondylar knee arthroplasty) to TKA (total knee arthroplasty). Initially, the physicians will contact the patients by phone in

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: Male or female patients in the age group = 18 years - Changeover operation "UKA to TKA" carried out

Exclusion criteria

Exclusion criteria: - Renewed revision of the knee TEP with replacement of individual or all components

Design outcomes

Primary

Measure	Time frame
The primary objective of this study is to investigate the revision rate and implant survival after UKA-to-TKA replacement surgery over the long term. In addition, the revision rate and implant survival for UKA implants can be determined in the same step and, if possible, different types of sled prostheses can be compared.	—

Secondary

Measure	Time frame
As secondary objectives, patient satisfaction and the subjective function of the joint will be investigated by means of questionnaires within the framework of a patient survey. On the other hand, the radiological images already taken pre- and postoperatively as well as follow-up images will be analyzed with regard to common radiological criteria of knee endoprosthetics (loosening according to Knee Society Roentgenographic Evaluation and Scoring System - KSRESS, joint and implant position pre- and postoperatively with common axial angles).	—

Measure

Time frame

As secondary objectives, patient satisfaction and the subjective function of the joint will be investigated by means of questionnaires within the framework of a patient survey. On the other hand, the radiological images already taken pre- and postoperatively as well as follow-up images will be analyzed with regard to common radiological criteria of knee endoprosthetics (loosening according to Knee Society Roentgenographic Evaluation and Scoring System - KSRESS, joint and implant position pre- and postoperatively with common axial angles).

—

Countries

Germany

Contacts

Public ContactYvonne Noll

Orthopädische Klinik der Medizinischen Hochschule Hannover im Diakovere Annastift, Leitung Klinisches Studienmanagement

yvonne.noll@diakovere.de0511-5354-649

Outcome results

None listed

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