Knee replacement – the function of an artificial knee joint

When severe knee pain can no longer be adequately relieved by pain medication, physiotherapy or other non-surgical treatments, an artificial knee joint (knee prosthesis) can help to significantly improve quality of life. The most common reasons for knee replacement surgery include advanced osteoarthritis, rheumatoid arthritis and post-traumatic osteoarthritis. All of these conditions can lead to severe pain and limited mobility in everyday life.

1.Advanced osteoarthritis

When the cartilage in the knee is severely worn, this leads to pain and restricted movement.

2.Rheumatoid arthritis

This inflammatory condition can lead to the destruction of the knee joint and cause severe pain.

3.Post-traumatic osteoarthritis

Injuries to the knee joint, such as bone fractures or ligament tears, can lead to permanent damage that may require an artificial knee joint.

4.Knee misalignment

Both congenital knee misalignments and those caused by injuries can make a knee replacement necessary.

5.Restricted mobility

 

If the mobility of the knee joint is so severely restricted that everyday activities such as walking, climbing stairs or standing up can hardly be performed.

An artificial knee joint can therefore help relieve pain and restore the function of the knee, enabling you to lead a more active life with fewer limitations. Robotic-assisted knee replacement combines the surgeon’s experience with the precision of modern technology.

Services in the field of occupational medicine

1.Company medical examinations

Occupational medical support for small and medium-sized companies in accordance with the Occupational Safety Act (§3 ASiG) and DGUV Regulation 2 Occupational physicians, including company inspections. Occupational medical advice on the preparation of risk assessments and the implementation of preventive occupational medical care in accordance with the Ordinance on Occupational Medical Care (ArbMedVV).

2.Occupational and social medical expert

Providing expert opinions in the assessment procedure for occupational diseases for the statutory accident insurance (employers' liability insurance associations), social and regional social courts.

Focal points:

  • all occupational cancers
  • Asbestos-related diseases
  • Radiation-induced diseases
  • Diseases of the blood and lymphatic system caused by benzene

3.Travel medicine

Qualified travel medical advice on the prevention of health risks associated with travelling and all vaccinations.

4.Yellow fever vaccination centre

Before travelling to a yellow fever infection area in tropical Africa or in Central and South America.

In case of entry regulations (country-specific!), especially when travelling from an area infected with yellow fever (including transit).

5.Traffic medicine

Occupational medical examinations to determine fitness to drive in accordance with the German Driving Licence Ordinance (FeV §11-14, Annex 4,5,6) for HGVs and passenger transport.

6.Radiation protection examinations in accordance with the Radiation Protection Ordinance

Radiation protection examinations in accordance with the Radiation Protection Ordinance (§77 and §78 StrlSchV)
Occupational medical examinations for the fitness of occupationally exposed persons, medical monitoring of occupationally exposed persons and medical monitoring after the end of the performance of duties.


Hip replacement – what is the function of an artificial hip joint

If the hip joint is severely damaged due to wear and tear, an accident or other conditions such as rheumatoid arthritis, every step can cause pain. Movements that once felt natural – climbing stairs, going for a walk or putting on shoes – become increasingly difficult. In such cases, an artificial hip joint (hip replacement) can help restore mobility and significantly reduce pain. The minimally invasive anterolateral approach offers a particularly gentle way of implanting the artificial joint – with faster recovery, less pain and high stability.

1.What happens during hip replacement surgery?

During the operation, the diseased hip joint is replaced with an artificial joint. This usually consists of a socket that is anchored in the pelvis and a stem with a ball head that is inserted into the thigh bone. The materials used are durable and well tolerated by the body, most commonly titanium, ceramic or special medical-grade plastics.

2.How are the implants fixed in place?

If the bone quality is good, the implant can be fixed directly in the bone without additional cement (“press-fit”). If the bone quality is reduced, for example in cases of osteoporosis, bone cement may be required to ensure stable fixation.

3.Which surgical techniques are used?

The minimally invasive anterolateral approach (ALMIS approach, anterior) is particularly gentle. In this method, the skin incision is kept small, and the muscles are not cut whenever possible but are carefully moved aside.

4.What advantages does this method offer?

  • Muscle- and tissue-sparing: Important hip muscles remain intact, which reduces postoperative pain.
  • Faster mobilisation: Many patients can stand up and take their first steps on the day of surgery or the following day.
  • Shorter rehabilitation time: Reduced soft tissue damage allows for faster recovery.
  • Lower risk of dislocation: More stable muscles around the joint provide greater support.
  • Smaller scars: Shorter skin incisions lead to a better cosmetic result.

5.How does aftercare proceed following a hip replacement?

Immediately after the procedure, physiotherapy begins in order to strengthen the muscles and enable safe movement of the new joint. This is usually followed by a rehabilitation programme in which walking, climbing stairs and other everyday movements are practised. Most patients are able to walk independently again after just a few weeks – often even without a walking aid.


Unsere Operateure

Schwarze und weiße Porträtaufnahme

Prof. Dr. med. Peter H. Pennekamp

Specialist in Orthopaedics and Trauma Surgery

Curriculum vitae
  • 1992–1999 Medical studies (Human Medicine), University of Cologne
  • 1999–2002 Medical Intern, St. Franziskus Hospital Cologne
  • 2002 Medical licence (Approbation)
  • 2006 Additional qualification in Manual Medicine / Chirotherapy
  • 2007 Specialist in Orthopaedics
  • 2007–2009 Research Fellow (DFG), Rush Medical Center, Chicago, USA
  • 2010 Specialist in Orthopaedics and Trauma Surgery · Habilitation (postdoctoral qualification)
  • 2010–2015 Senior Consultant / Managing Senior Consultant, University Hospital Bonn
  • 2011 Head of the Section for Tumour and Rheumatological Orthopaedics, Haemophilia
  • 2012 Additional qualification in Special Trauma Surgery
  • 2015 Additional qualification in Special Orthopaedic Surgery · Adjunct Professorship (apl. Professor)
  • Since 2016 Chief Physician, Department of Orthopaedics and Trauma Surgery, Geriatric Trauma Care, Cellitinnen Hospital St. Hildegardis, Cologne
  • 70 publications (PubMed) · more than 100 lectures · teaching activities at the University of Bonn
  • Surgical focus: hip and knee replacement surgery · foot surgery · tumour and rheumatological orthopaedics · kyphoplasty · trauma surgery
  • Memberships: DGOU · VLOU · BVOU · D.A.F.
Dr. med. Alexander Schreiber

Specialist in Orthopaedics and Trauma Surgery

Curriculum vitae
  • 2007 - 2014 Medizinstudium an der Universität Bonn
  • 2015 - 2019 Assistenzarzt in der Abteilung für Orthopädie und Unfallchirurgie, St. Josef-Hospital, Troisdorf 
  • seit 2020 Assistenzarzt in der Abteilung für Orthopädie, Unfallchiriurgie und Sportmedizin, MediaPark Klinik, Köln 
  • Stellvertrender Mannschaftsarzt 1. FC Köln U21

Section for Endoprosthetics


Prof. Dr. med. Peter H. Pennekamp
Facharzt für Orthopädie und Unfallchirurgie

Dr. med. Alexander Schreiber
Facharzt für Orthopädie und Unfallchirurgie

Contact


MVZ for Orthopaedics, Trauma Surgery and Sports Medicine Cologne GmbH
5th floor
Zeppelinstr. 1 / Neumarkt Galerie
50667 Cologne

www.orthopaedie-koeln.de

In cooperation with PAN Klinik am Neumarkt

Contact/Appointments


Orthopaedics, Trauma Surgery and Sports Medicine
0221 2776-290info@orthopaedie-koeln.de


Hip- and Knee Replacement
0221 2776-113endoprothetik@pan-klinik.de 

Consultation hours/Appointments


by arrangement

Your Doctors


Prof. Dr Peter H. Pennekamp
Specialist in Orthopaedics and Trauma Surgery

Dr Alexander Schreiber
Specialist in Orthopaedics and Trauma Surgery
Senior Consultant in Joint Replacement Surgery

Dr Rudolf Ziolko
Specialist in Orthopaedics and Trauma Surgery

Dr Egon F. Stricker
Specialist in Orthopaedics and Trauma Surgery
and Graduate Sports Scientist

Dr Simone Stockhausen
Specialist in Orthopaedics and Trauma Surgery

to the team

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