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Updated: Mar 23, 2026

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
Published on: January 24, 2018
PRELIMINARY RESULTS FROM THE METIS-NEWDEAL(®) TOTAL METATARSOPHALANGEAL PROSTHESIS
Luís Fernando Nunes Pires Silva1, Cristina Varino Sousa1, Ricardo Rodrigues Pinto2
1Complementary Internal Doctor in Orthopedics and Traumatology of the Unidade Local de Saúde de Alto Minho, EPE, Porto - Portugal.
Objective:
To evaluate the preliminary results from the METIS-Newdeal(®) metatarsophalangeal prosthesis for treating hallux rigidus grade III/IV.
Methods:
This was a prospective study on eight metatarsophalangeal prostheses that were placed in six patients between November 2007 and July 2009. The patients' mean age was 55 years and the mean follow-up after the surgery was 50 weeks. The results were evaluated using the AOFAS-MTP score and x-ray images as controls.
Results:
The AOFAS-MTP score increased significantly from 42p before the surgery to 82p after the surgery (↑ 1.95x), mainly due to improvement in the functional level. No intercurrences were identified radiologically. Among the five patients who underwent operations, only one expressed dissatisfaction with the surgery: this was expressed after early infection appeared at the surgical site, and it was the only postoperative complication found.
Conclusion:
Total metatarsophalangeal arthroplasty using METIS-Newdeal(®) presented promising short-term results. However, evaluations on a larger number of cases with a longer follow-up are needed in order to draw more consistent conclusions.

