The Effect of Sagittal Knee Deformity on Preoperative Measurement of Coronal Mechanical Alignment during Total Knee Arthroplasty
The Journal of Korean Knee Society
;
: 110-114, 2017.
Article
in English
| WPRIM
| ID: wpr-759268
ABSTRACT
PURPOSE:
The purpose of this prospective study was to determine correlation between coronal mechanical alignment measured on preoperative standing full-length radiographs and navigation during total knee arthroplasty (TKA) in the presence of an associated sagittal deformity (hyperextension and flexion deformity). MATERIALS ANDMETHODS:
Coronal mechanical alignment measured on preoperative, standing, full-length, hip-to-ankle anteroposterior radiographs was compared with intraoperative measurements recorded with computer navigation in 200 primary navigated TKAs.RESULTS:
The mean difference in mechanical alignment between the two techniques was significantly greater (p=0.001) in patients with an associated flexion deformity >10° when compared to knees with associated flexion deformity ≤10°; 48% of knees with a flexion deformity >10° had a difference of ≥3° between the full-length radiograph and navigation alignment measurements. There was a strong correlation between the radiographic and navigation measurement techniques.CONCLUSIONS:
The mean difference in coronal mechanical alignment between the two techniques was significantly higher in patients with an associated flexion deformity >10°. Hence, surgeons should take caution when relying on preoperative full-length radiographs for determining coronal mechanical alignment in patients with an associated flexion deformity >10° where using navigation may be more reliable.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Arthroplasty
/
Congenital Abnormalities
/
Prospective Studies
/
Arthroplasty, Replacement, Knee
/
Surgery, Computer-Assisted
/
Surgeons
/
Knee
Type of study:
Observational study
Limits:
Humans
Language:
English
Journal:
The Journal of Korean Knee Society
Year:
2017
Type:
Article
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