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First metatarsophalangeal joint replacement: long-term results of a double stemmed flexible silicone prosthesis
E W Ter Keurs1, S Wassink, B J Burger
1Spaarne Ziekenhuis, Spaarnepoort 1, 2134 TM Hoofddorp, The Netherlands.
Background:
The aim of this retrospective study was to evaluate the long-term results of a Swanson type silicone prosthesis used for the first metatarsophalangeal (FMTP) joint replacement. It compares implants with and without the use of grommets.
Methods:
Fifty-nine FMTP joints were replaced. The average follow-up period was 9 years. Subjective and clinical findings were scored according to the AOFAS-HMI (American Orthopedic Foot and Ankle Society-Hallux Metatarsophalangeal-Interphalangeal) score. X-ray examination was carried out by evaluation of the presence of reactive bone areas around the implant.
Results:
Ninety-five percent of patients had relief of pain. Clinical findings showed a reasonable function (range of motion >30°) in 77% of the FMTP joints. A trend for decrease in radiolucency and lytic bone was seen in areas around the implant with the use of grommets.
Conclusion:
The prosthesis shows good results concerning pain relief and a reasonable to good function (>30° range of motion) of the FMTP joint in most patients. Reactive bone areas around the implant decreased by the use of grommets.