Optimal Sagittal Insertion Depth and Direction of Femoral Intramedullary Rod in Total Knee Arthroplasty in Chinese Osteoarthritis Patients

Ou, Yong‐liang; Li, Pingyue; Xia, Hong

doi:10.1111/os.12753

Cited by 4 publications

(4 citation statements)

References 21 publications

(28 reference statements)

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“…At the same time shows no statistical significance among various length of lengths. 8 It was found that three-degree varus and valgus alignment of TKR femoral implant does give best stability. 9 In our study we found that maximum samples inside this three-degree varus and valgus as shown in table no.5.…”

Section: Discussionmentioning

confidence: 99%

Untitled

2024

SVOAOR

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Introduction: Total Knee Replacement is common surgery to treat osteoarthritis in present day. This is important to restore the daily activities of living and at times it also helps to patients to go further with daily activities of earning in their old age. This surgery also reduces the burden of old people in the society. With advancements in TKR surgery, every aspect of alignment of prosthesis needs to be measured to determine acceptability of implant. Further this can help in refinement to improve the movement and acceptance of implant, better patient satisfaction. Aim:We here by propose null hypothesis that use of long or short Intramedullary Alignment Guide (IAG) during the distal femur cut cannot influence the alpha angle of femur. Materials and Methods:This is a radiological evaluation study done in BIRRD (T) Hospital. All the patients admitted into BIRRD for TKR in unit III were evaluated pre operatively. Surgery was performed by different surgeons based upon their training and using of IAG (short or long). There were no indications for use of short or long IAG. This is totally based on surgeon preference on using. Later alpha angle was measured post operatively.Observation and Results: A total of 243 patients were included into the study. Data was collected based the surgeons experience and preference in use of long and short IAG device. There were 96 and 147 patients were long and short IAG devices used respectively. It was found that alpha angle of 93.6 o (+ 2.7) and 93.4 o (+ 3.04) respectively with long and short IAG. Conclusion:We found that there is no significant statistical difference in alpha angle with use of long and short IAG during femur cuts in TKR. Hence null hypothesis is accepted.

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Section: Discussionmentioning

confidence: 99%

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2024

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Section: Discussionmentioning

confidence: 99%

Variance of Alpha Angle with Use of Intramedullary Guide – Long or Short Intramedullary Alignment Guide (IAG)

Krishna Avulapati

2024

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Introduction: Total Knee Replacement is common surgery to treat osteoarthritis in present day. This is important to restore the daily activities of living and at times it also helps to patients to go further with daily activities of earning in their old age. This surgery also reduces the burden of old people in the society. With advancements in TKR surgery, every aspect of alignment of prosthesis needs to be measured to determine acceptability of implant. Further this can help in refinement to improve the movement and acceptance of implant, better patient satisfaction. Aim: We here by propose null hypothesis that use of long or short Intramedullary Alignment Guide (IAG) during the distal femur cut cannot influence the alpha angle of femur. Materials and Methods: This is a radiological evaluation study done in BIRRD (T) Hospital. All the patients admitted into BIRRD for TKR in unit III were evaluated pre operatively. Surgery was performed by different surgeons based upon their training and using of IAG (short or long). There were no indications for use of short or long IAG. This is totally based on surgeon preference on using. Later alpha angle was measured post operatively. Observation and Results: A total of 243 patients were included into the study. Data was collected based the surgeons experience and preference in use of long and short IAG device. There were 96 and 147 patients were long and short IAG devices used respectively. It was found that alpha angle of 93.6o (+ 2.7) and 93.4o (+ 3.04) respectively with long and short IAG. Conclusion: We found that there is no significant statistical difference in alpha angle with use of long and short IAG during femur cuts in TKR. Hence null hypothesis is accepted.

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“…Optimal positioning of the femoral component in the sagittal plane has not yet been defined [ 13 , 14 ]. Surgeons using navigation, for sagittal positioning of femoral component, continue to make the distal femoral cut perpendicular to SMX [ 8 , 9 ], although studies have shown that this can increase the risk of notching in navigated TKA [ 6 , 12 ].…”

Section: Discussionmentioning

confidence: 99%

Notching is less, if femoral component sagittal positioning is planned perpendicular to distal femur anterior cortex axis, in navigated TKA

Kanna¹,

Ravichandran²,

Shetty

2021

Knee Surg & Relat Res

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Purpose In navigated TKA, the risk of notching is high if femoral component sagittal positioning is planned perpendicular to the sagittal mechanical axis of femur (SMX). We intended to determine if, by opting to place the femoral component perpendicular to distal femur anterior cortex axis (DCX), notching can be reduced in navigated TKA. Methods We studied 171 patients who underwent simultaneous bilateral computer-assisted TKA. Femoral component sagittal positioning was planned perpendicular to SMX in one knee (Femur Anterior Bowing Registration Disabled, i.e. FBRD group) and perpendicular to DCX in the opposite knee (Femur Anterior Bowing Registration Enabled, i.e. FBRE group). Incidence and depth of notching were recorded in both groups. For FBRE knees, distal anterior cortex angle (DCA), which is the angle between SMX and DCX, was calculated by the computer. Results Incidence and mean depth of notching was less (p = 0.0007 and 0.009) in FBRE versus FBRD group, i.e. 7% versus 19.9% and 0.98 mm versus 1.53 mm, respectively. Notching was very high (61.8%) in FBRD limbs when the anterior bowing was severe (DCA > 3°) in the contralateral (FBRE) limbs. Conclusion Notching was less when femoral component sagittal positioning was planned perpendicular to DCX, in navigated TKA. Level of evidence Therapeutic level II.

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Optimal Sagittal Insertion Depth and Direction of Femoral Intramedullary Rod in Total Knee Arthroplasty in Chinese Osteoarthritis Patients

Cited by 4 publications

References 21 publications

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Variance of Alpha Angle with Use of Intramedullary Guide – Long or Short Intramedullary Alignment Guide (IAG)

Notching is less, if femoral component sagittal positioning is planned perpendicular to distal femur anterior cortex axis, in navigated TKA

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