AMIS (Anterior Minimally Invasive Surgery) bedeutet, eine Hüft-Totalendoprothese mit direktem vorderen Zugang auf äußerst schonende Art und Weise zu implantieren. Diese Methode ist momentan die einzige Technik, die sowohl Muskeln als auch Nerven berücksichtigt und das Risiko der teilweisen Gewebezerstörung beträchtlich vermindert.

A LOGICAL APPROACH

Total Hip Replacement is a safe and clinically proven surgical procedure. Implant manufacturers and orthopaedic surgeons have been working in partnership on Total Hip Replacement for many
years, the former improving and mastering the materials used, and the latter refining the implantation techniques. Medacta^® International is committed to becoming a preferred partner for new technologies such as in total hip arthroplasty through the minimally invasive anterior approach (the AMIS^® approach = Anterior Minimally Invasive Surgery). A true Minimally Invasive Surgery (MIS) is characterized by a reduced skin incision and the preservation of muscles and tendons. The anterior approach follows the principles of MIS. Other approaches advertised as minimally invasive (posterior, lateral, or double incision approach) are associated with muscles and/or tendons injury and thus are only reduced skin incision techniques.

The anterior approach, strengthened by several years of clinical experience, is the only technique which follows a path both intermuscular and internervous and therefore reduces considerably the risk to damage periarticular structures such as muscles, tendons, vessels and nerves.
For this reason the AMIS^® approach is the ideal approach for atraumatic surgery which is fundamental for a fast recovery.

AMIS^® ADVANTAGES
The preservation of all muscles ensures:

• Shorter stays in the hospital.
• Shorter rehabilitation.
• Reduced risk of dislocation.
• Immediate post-operative muscle tone preservation.
• Decreased post-operative pain.
• Less blood loss.
• Faster return to daily activities.
• Reduction of scar tissue.

AMIS^® ADVANTAGES: NOT ONLY SHORT TERM BETTER RESULTS

Thanks to the AMIS^® technique risks are decreased when compared to a standard technique both in the short and in the medium term.

In fact, it has been demonstrated that:

• After Total Hip Replacement, trochanteric soft tissue abnormalities may be associated with residual trochanteric pain and limping, in other words with symptomatic patients. Defects of the abductor tendons and fatty atrophy of the gluteus medius and the posterior part of the gluteus minimus muscle are rare in asymptomatic patients^1.2.
• The use of the anterior approach for primary Total Hip Replacement shows, that at one year after surgery better functional results and a smaller extent of injury in the muscle and tendon units compared to other approaches³.

This means: the AMIS^® approach shows that at one year after surgery there is less symptomatic muscle degeneration compared with other approaches.

Therefore the AMIS^® technique should provide better results in the short and medium term and an improved long term quality of life for your patients.

^{1 Abductor Tendons and Muscles Assessed at MR Imagin after Total Hip Arthroplasty in Asymptomatic and Symptomatic Patients. C. Pfirmann et al., Radiology 2005, 235: 969-976.}

^{2 MR imaging of the abductor tendons and muscles after total hip replacement in asymptomatic and symptomatic patients. PD Dr Dora, EFORT 2007.}

^{3 Der anteriore Zugang für die minimal-invasive HTEP. C Dora; Leading Opinions Sept 2006, 1/2006.}

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