title: A prospective investigation of the BioPro hemi-arthroplasty for the first metatarsophalangeal joint.
abstract: First metatarsophalangeal joint hemi-implant arthroplasty is commonly used for 1-sided degenerative joint disease. This study examined outcomes in patients that underwent hemi-arthroplasty using the BioPro hemi-implant. Twenty-three of 30 patients completed the 12-month follow-up between October 2001 and June 2003. Repeated measures multivariate analysis of covariance was used to consider the influence of the implant on a number of dependent variables, while controlling for the amount of first metatarsal head cartilage degeneration. The average amount of first metatarsal head cartilage degeneration visualized intra-operatively was 71.8% +/- 21.7%. From the preoperative to postoperative periods, the average hallux abductus angle went from 12.6 degrees +/- 6.5 degrees to 10.2 degrees +/- 5.3 degrees (P = 0.521), the average first intermetatarsal angle went from 11.0 degrees +/- 2.3 degrees to 10.5 degrees +/- 2.0 degrees (P = 0.434), the average first metatarsal declination angle went from 18.5 degrees +/- 4.1 degrees to 18.3 degrees +/- 4.1 degrees (P = 0.297), the average ACFAS score went from 41.2 +/- 11.6 to 80.4 +/- 8.8 (P = 0.003), average dorsiflexion went from 12.6 +/- 12.4 to 50.0 +/- 8.7 (P = 0.009), and average plantarflexion went from 8.0 +/- 8.0 to 17.5 +/- 6.7 (P < 0.001). Despite the presence of first metatarsal head cartilage degeneration, the ACFAS outcome score and the range of motion improved following implant arthroplasty, and these findings support the use of this procedure as a useful salvage intervention even in patients with pre-existing double-sided first metatarsophalangeal joint disease.
authors.affiliation: American Board of Podiatric Surgery, Podiatric Surgery Department, Detroit Medical Center, Podiatric Residency Program of Detroit Medical Center, Detroit, MI, USA. ckissel123@aol.com
authors.forename: Charles G
authors.initials: CG
authors.lastname: Kissel
authors.forename: Zeeshan S
authors.initials: ZS
authors.lastname: Husain
authors.forename: Paul H
authors.initials: PH
authors.lastname: Wooley
authors.forename: Michael
authors.initials: M
authors.lastname: Kruger
authors.forename: Mark A
authors.initials: MA
authors.lastname: Schumaker
authors.forename: Michael
authors.initials: M
authors.lastname: Sullivan
authors.forename: Todd
authors.initials: T
authors.lastname: Snoeyink
mesh_terms: D000328:Adult; D000368:Aged; D019643:Arthroplasty, Replacement / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D037061:Metatarsalgia / Q000000981:diagnostic imaging / Q000601:surgery*; D008683:Metatarsophalangeal Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D008875:Middle Aged; D015999:Multivariate Analysis; D011446:Prospective Studies; D011859:Radiography; D016059:Range of Motion, Articular; D016896:Treatment Outcome