Abstract
We previously compared the 15-year survivorship of total knee arthroplasty (TKA) implants that were mechanically aligned (0° ± 3° relative to the mechanical axis) compared with those that were outside that range and considered outliers. The original publication included 398 TKAs (292 in the aligned group and 106 in the outlier group) performed from 1985 to 1990. At the time of follow-up in the previous study, 138 patients (155 TKAs) had died and 59 knees had been revised. Since that publication, 49 additional patients (87 knees) have died. At 20 years, 57 (19.5%) of the 292 knees in the mechanically aligned group had been revised compared with 16 (15.1%) of the 106 knees in the outlier group (p = 0.97). Postoperative alignment within 0° ± 3° of the mechanical axis did not provide a functional advantage at 1, 5, 10, 15, and/or 20 years postoperatively as demonstrated by the Knee Society scores being similar between the groups (p ≥ 0.2 at all intervals). At 20 years, we once again did not find that neutral mechanical alignment provided better implant survivorship than that found in the outlier group.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 472-478 |
| Number of pages | 7 |
| Journal | Journal of Bone and Joint Surgery - American Volume |
| Volume | 100 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jan 1 2018 |
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ASJC Scopus subject areas
- Surgery
- Orthopedics and Sports Medicine
Cite this
Effect of postoperativemechanical axis alignment on survival and functional outcomes of modern total knee arthroplasties with cement : A concise follow-up at 20 years. / Abdel, Matthew; Ollivier, Matthieu; Parratte, Sebastien; Trousdale, Robert T.; Berry, Daniel J.; Pagnano, Mark.
In: Journal of Bone and Joint Surgery - American Volume, Vol. 100, No. 6, 01.01.2018, p. 472-478.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of postoperativemechanical axis alignment on survival and functional outcomes of modern total knee arthroplasties with cement
T2 - A concise follow-up at 20 years
AU - Abdel, Matthew
AU - Ollivier, Matthieu
AU - Parratte, Sebastien
AU - Trousdale, Robert T.
AU - Berry, Daniel J.
AU - Pagnano, Mark
PY - 2018/1/1
Y1 - 2018/1/1
N2 - We previously compared the 15-year survivorship of total knee arthroplasty (TKA) implants that were mechanically aligned (0° ± 3° relative to the mechanical axis) compared with those that were outside that range and considered outliers. The original publication included 398 TKAs (292 in the aligned group and 106 in the outlier group) performed from 1985 to 1990. At the time of follow-up in the previous study, 138 patients (155 TKAs) had died and 59 knees had been revised. Since that publication, 49 additional patients (87 knees) have died. At 20 years, 57 (19.5%) of the 292 knees in the mechanically aligned group had been revised compared with 16 (15.1%) of the 106 knees in the outlier group (p = 0.97). Postoperative alignment within 0° ± 3° of the mechanical axis did not provide a functional advantage at 1, 5, 10, 15, and/or 20 years postoperatively as demonstrated by the Knee Society scores being similar between the groups (p ≥ 0.2 at all intervals). At 20 years, we once again did not find that neutral mechanical alignment provided better implant survivorship than that found in the outlier group.
AB - We previously compared the 15-year survivorship of total knee arthroplasty (TKA) implants that were mechanically aligned (0° ± 3° relative to the mechanical axis) compared with those that were outside that range and considered outliers. The original publication included 398 TKAs (292 in the aligned group and 106 in the outlier group) performed from 1985 to 1990. At the time of follow-up in the previous study, 138 patients (155 TKAs) had died and 59 knees had been revised. Since that publication, 49 additional patients (87 knees) have died. At 20 years, 57 (19.5%) of the 292 knees in the mechanically aligned group had been revised compared with 16 (15.1%) of the 106 knees in the outlier group (p = 0.97). Postoperative alignment within 0° ± 3° of the mechanical axis did not provide a functional advantage at 1, 5, 10, 15, and/or 20 years postoperatively as demonstrated by the Knee Society scores being similar between the groups (p ≥ 0.2 at all intervals). At 20 years, we once again did not find that neutral mechanical alignment provided better implant survivorship than that found in the outlier group.
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UR - http://www.scopus.com/inward/citedby.url?scp=85051682494&partnerID=8YFLogxK
U2 - 10.2106/JBJS.16.01587
DO - 10.2106/JBJS.16.01587
M3 - Article
C2 - 29557863
AN - SCOPUS:85051682494
VL - 100
SP - 472
EP - 478
JO - Journal of Bone and Joint Surgery - American Volume
JF - Journal of Bone and Joint Surgery - American Volume
SN - 0021-9355
IS - 6
ER -