title: PRELIMINARY RESULTS FROM THE METIS-NEWDEAL(®) TOTAL METATARSOPHALANGEAL PROSTHESIS.
abstract: 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.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Complementary Internal Doctor in Orthopedics and Traumatology of the Unidade Local de Saúde de Alto Minho, EPE, Porto - Portugal.
authors.forename: Luís Fernando Nunes Pires
authors.initials: LF
authors.lastname: Silva
authors.affiliation: Complementary Internal Doctor in Orthopedics and Traumatology of the Unidade Local de Saúde de Alto Minho, EPE, Porto - Portugal.
authors.forename: Cristina Varino
authors.initials: CV
authors.lastname: Sousa
authors.affiliation: Complementary Internal Doctor in Orthopedics and Traumatology of the Centro Hospitalar do Porto - Hospital de Santo António, EPE, Porto - Portugal.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Rodrigues Pinto
authors.affiliation: Complementary Internal Doctor in Orthopedics and Traumatology of the Centro Hospitalar do Porto - Hospital de Santo António, EPE, Porto - Portugal.
authors.forename: Claudia
authors.initials: C
authors.lastname: Santos
authors.affiliation: Specialist Doctor in Orthopedics and Traumatology of the Centro Hospitalar do Porto - Hospital de Santo António, EPE, Porto - Portugal.
authors.forename: José Muras
authors.initials: JM
authors.lastname: Geada
keywords: Arthroplasty; Hallux Rigidus; Metatarsophalangeal Joint