First MTP fusion is a commonly performed procedure for the treatment of a variety of disorders of the first MTP joint. The most stable technique for obtaining fusion in this study was the combination of an oblique lag screw and a dorsal plate. This should lead to higher rates of arthrodesis.
One hundred fifteen patients with signs and symptoms of Mortons' interdigital neuroma were studied in an attempt to evaluate the efficacy of a staged treatment program. The first stage consisted of patient education, footwear modifications, and metatarsal head relief. The second stage consisted of a steroid/local anesthetic injection into the affected interspace. The third stage was surgical excision of the inflamed interdigital nerve. Overall, 97 of 115 patients (85%) believed that they had improved with the treatment program. Twenty-four patients (21%) eventually required surgical excision of the nerve and 23 of 24 patients (96%) had satisfactory results. The results of the staged treatment protocol were very satisfactory and patient satisfaction was high.
We concluded that a solid first MTPJ fusion results in excellent function and pain relief. The Accutrak first MTPJ fusion system would appear to be an ideal implant system to accomplish a fusion because of its low profile, strength, and ease of use. Compared to other methods we have used, this procedure results in a very high rate of fusion, with minimal complications and excellent patient satisfaction.
A solid first MTPJ fusion results in excellent function and pain relief, but the Synthes Modular Hand Set implants do not appear to be strong enough in all patients for this application; nonunion at the arthrodesis site and failure of hardware occurred in 13% of arthrodeses. We no longer recommend this implant for this application.
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