Holger Haas

House St. Petrus, Bonner Talweg 4-6
Bonn, NW 53113, Germany

Last Updated: 09/26/2026

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Found 15 publications

EndoCert-Concept, development, and current challenges of a certification system in endoprosthetics

EndoCert-Concept, development, and current challenges of a certification system in endoprosthetics

Journal: Orthopadie (Heidelberg, Germany)

Published: June 04, 2026

EndoCert and EPRD-two pillars of quality assurance in arthroplasty

EndoCert and EPRD-two pillars of quality assurance in arthroplasty

Journal: Orthopadie (Heidelberg, Germany)

Published: March 19, 2026

Certification and its influence on the work in certified arthroplasty centers

Certification and its influence on the work in certified arthroplasty centers

Journal: Orthopadie (Heidelberg, Germany)

Published: February 16, 2026

Risk adjustment as a prerequisite for quality assessment in certification and registry analyses

Risk adjustment as a prerequisite for quality assessment in certification and registry analyses

Journal: Orthopadie (Heidelberg, Germany)

Published: February 16, 2026

Implications of the federal hospital reform : Structural requirements, service groups, and the role of certified quality systems illustrated by the example of endoprosthetics

Implications of the federal hospital reform : Structural requirements, service groups, and the role of certified quality systems illustrated by the example of endoprosthetics

Journal: Orthopadie (Heidelberg, Germany)

Published: February 08, 2026

Identification of joint-specific risk factors for risk adjustment in total knee arthroplasty-A modified Delphi process

Identification of joint-specific risk factors for risk adjustment in total knee arthroplasty-A modified Delphi process

Journal: Orthopadie (Heidelberg, Germany)

Published: November 30, 2025

Quality Assurance through EndoCert in Revision Hip and Knee Arthroplasty.

Quality Assurance through EndoCert in Revision Hip and Knee Arthroplasty.

Journal: Zeitschrift fur Orthopadie und Unfallchirurgie

Published: August 04, 2025

Three-year revision rate of certified centres for joint replacement according to EndoCert : Risk-adjusted analysis of outcome quality and comparison with other quality assurance systems

Three-year revision rate of certified centres for joint replacement according to EndoCert : Risk-adjusted analysis of outcome quality and comparison with other quality assurance systems

Journal: Orthopadie (Heidelberg, Germany)

Published: January 13, 2023

Evaluation of the patient-accompanying app "alley ortho companion" for patients with osteoarthritis of the knee and hip: study protocol for a randomized controlled multi-center trial.

Evaluation of the patient-accompanying app "alley ortho companion" for patients with osteoarthritis of the knee and hip: study protocol for a randomized controlled multi-center trial.

Journal: Trials

Published: December 10, 2021

Evaluation of the standard procedure for treatment of periprosthetic joint infections of total knee and hip arthroplasty: a comparison of the 2015 and 2020 census in total joint replacement centres in Germany.

Evaluation of the standard procedure for treatment of periprosthetic joint infections of total knee and hip arthroplasty: a comparison of the 2015 and 2020 census in total joint replacement centres in Germany.

Journal: BMC musculoskeletal disorders

Published: January 27, 2021

Evaluation of the standard procedure for the treatment of periprosthetic joint infections (PJI) in Germany - results of a survey within the EndoCert initiative.

Evaluation of the standard procedure for the treatment of periprosthetic joint infections (PJI) in Germany - results of a survey within the EndoCert initiative.

Journal: BMC musculoskeletal disorders

Published: June 19, 2020

Influence of Revision Surgeries and Revision Rate on Quality Indicators in Certified Centres for Joint Replacement (EndoProthetikZentren).

Influence of Revision Surgeries and Revision Rate on Quality Indicators in Certified Centres for Joint Replacement (EndoProthetikZentren).

Journal: Zeitschrift fur Orthopadie und Unfallchirurgie

Published: February 26, 2020

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Last Updated: 09/26/2026