Prospective analysis of a first MTP total joint replacement. Evaluation by bone mineral densitometry, pedobarography, and visual analogue score for pain

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• 作者：Eva Wetke ; MD^a ; ^{evawetke@hotmail.com} ; Bo Zerahn ; MD^b ; Hakon Kofoed ; MD^a
• 关键词：Arthroplasty ; Bone mineral density ; First metatarsophalangeal joint ; Hallux rigidus ; Pedobarography ; Total joint replacement ; Ground reaction force
• 刊名：Foot and Ankle Surgery
• 出版年：2012
• 期刊代码：294_12687731
• 类别：med
• 出版时间：June, 2012
• 卷：18
• 期：2
• 页码：136-140
• 文件大小：273 K

摘要

Background

We hypothesized that a total replacement of the first metatarsophalangeal joint (MTP-1) would alter the walking pattern with medialisation of the ground reaction force (GRF) of the foot and subsequently cause an increase in bone mineral density (BMD) in the medial metatarsal bones and a decline of BMD in the lateral metatarsal bones.

Methods

Twelve patients receiving total joint replacements (Roto-Glide^庐) of MTP-1 were enrolled in a prospective cohort. BMD and pedobarography of the heel bone and the metatarsal heads were performed preoperatively and at least 12 months postoperatively.

Results

BMD in the lateral metatarsals and GRF under the lateral column of the operated feet decreased significantly on the operated feet.

Conclusions

Total joint replacement of MTP-1 tends to reduce GRF under the lateral column of the foot causing a corresponding decline in BMD and pedobarographic measures. Our findings support the further use of the Roto-Glide^庐 prosthesis for osteoarthritis of the first metatarsophalangeal joint.