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Midterm results using a medial pivot total knee replacement compared with the A ustralian N ational J oint Replacement R egistry data
Author(s) -
Brinkman JustusMartijn,
Bubra Preet Singh,
Walker Peter,
Walsh William R.,
Bruce Warrick J. M.
Publication year - 2014
Publication title -
anz journal of surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 70
eISSN - 1445-2197
pISSN - 1445-1433
DOI - 10.1111/ans.12428
Subject(s) - medicine , implant , radiography , knee replacement , total knee replacement , orthodontics , surgery , orthopedic surgery
Background In order to emulate normal knee kinematics more closely, and thereby potentially improve wear characteristics and implant longevity, the medial pivot‐type knee replacement geometry was designed. In the current study the outcome of 50 consecutive knee replacements using a medial pivot‐type knee replacement was compared with the results in the A ustralian O rthopaedic A ssociation N ational J oint R eplacement R egistry. Methods Pre‐ and post‐operatively at follow‐up evaluation consisted of the K nee S ociety score system and the W estern O ntario and M cMaster U niversities A rthritis I ndex S core. Patient satisfaction was documented using 5‐point Likert‐type scales. Standard radiographs were used to assess signs of radiographic failure. Revisions were subcategorized into major total, major partial and minor. Patient records were cross‐referenced against the A ustralian O rthopaedic A ssociations N ational J oint R eplacement R egistry's and the outcome compared with the registry's subset of data on the medial pivot knee used. Results According to the patients' K nee S ociety score system and W estern O ntario and M c M aster U niversities A rthritis I ndex scores, there was good pain relief and functional improvement; none of the implants showed radiographic signs of failure. There was one minor revision. There was no statistically significant difference in revision rate compared with the registry results. Discussion The medial pivot knee‐type implant in this series provided pain relief, functional improvement and a revision rate, similar to what is reported in the literature after a longer follow‐up period, which is reassuring for those who use this type of implant on a day‐to‐day basis.