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Purpose: This study outlines the benefits of the proximal tibia angle (PTA) in evaluation of the pre-operative individual condylar twist angle (CTA) in total knee arthroplasty.
Methods: Condylar twist angle and proximal tibia angle were obtained from 33 female healthy participants using computed tomography (CT). The CTA, angle between clinical transepicondylar axis and posterior condylar line were measured. The PTA is the angle formed between the mechanical axis of the tibia and tibia plateau line. The correlation between the CTA and the PTA was analyzed statistically with the linear regression.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| CT | Measured with computed tomography | ||
| plain Radiography | Measured with plain Radiography |
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| Measure | Description | Time Frame |
|---|---|---|
| proximal tibia angle (PTA) | The PTA is the angle formed between the mechanical axis of the tibia and tibia plateau line. | Four months |
| Measure | Description | Time Frame |
|---|---|---|
| Condylar twist angle (CTA) | The CTA is the angle between clinical transepicondylar axis and posterior condylar line | Four months |
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Inclusion Criteria:
Exclusion Criteria:
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Chinese female patients with primary varus knee OA, scheduled for primary TKAs
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Qiang He, MD | Contact | 13572887175 | heqianghonghui@163.com |
| Name | Affiliation | Role |
|---|---|---|
| Jianbing Ma, MD | Honghui Hospital | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Honghui Hospital | Recruiting | Xi’an | Shanxi | 710054 | China |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 15864052 | Background | Kanekasu K, Kondo M, Kadoya Y. Axial radiography of the distal femur to assess rotational alignment in total knee arthroplasty. Clin Orthop Relat Res. 2005 May;(434):193-7. doi: 10.1097/01.blo.0000156819.24866.8b. | |
| 26803321 | Background | Savin L, Botez P, Mihailescu D, Predescu V, Grierosu C. Pre-operative radiological measurement of femoral rotation for prosthetic positioning in total knee arthroplasty. Int Orthop. 2016 Sep;40(9):1855-60. doi: 10.1007/s00264-015-3110-2. Epub 2016 Jan 23. |
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| Hong-hui Hospital | Recruiting | Xi'an | China |
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| 25453922 | Background | Kobayashi H, Aratake M, Akamatsu Y, Mitsugi N, Taki N, Saito T. Reproducibility of condylar twist angle measurement using computed tomography and axial radiography of the distal femur. Orthop Traumatol Surg Res. 2014 Dec;100(8):885-90. doi: 10.1016/j.otsr.2014.07.025. Epub 2014 Nov 20. |