Summary: In our study shows that residual varus due to HKA and aHKA as well as undercorrection of LDFA increases the satisfaction score after surgery, however, the increase of LDFA is the most important factor with statistically significant difference.

Background

The success of TKR is multifactorial. The benefit from this procedure is to improve pain and increase the patients' quality of life style. Traditionally, TKR is performed with mechanical alignment, but recent studies observed great variability of constitutional alignment between each patient, so the variability of patient satisfaction with this philosophy could be related to the change of anatomy.

Purpose

The purpose of the article is to compare patient satisfaction outcomes after total knee replacement with mechanical alignment philosophy in patients who had preoperative varus deformity and postoperative obtained residual varus or neutral alignment.

Material And Methods

Analytical, retrospective partial retrospective, longitudinal observational study from 2016-2020. We measured preoperatively and postoperatively the mechanical axis, arithmetic mechanical axis, joint obliquity, LDFA, MPTA. For statistical analysis we divided the study into two parts. The first part consists of the comparison of the means of the FJS-12 score between both groups. In the second part we divided the sample into two groups, patients with scores higher or lower than 68 points on the FJS-12 scale in which we obtained a Spearman correlation and compared their respective means. Finally, we performed a multiple linear and binomial logistic regression of each section with the variables that were statistically significant in order to determine the factors that most influence the change in the scale score.

Results

In the last 5 years and after performing the inclusion and exclusion criteria, we obtained a total of 35 patients and 42 TKR with mechanical alignment. We found better results in satisfaction scores when HKA sub-correction, sub-correction or correction to neutral of LDFA, maintaining the same HKA and aHKA as well as obtaining postoperative varus by aHKA. However in multiple linear regression, the most important factors influencing the FJS-12 score are: Postoperative LDFA and keeping the same mechanical axis (R2 of 424, p=.000).
In the second part, the correlation observes that postoperative LDFA was shown to be the most important factor in satisfaction scores. The oddis ratio shows that the risk of presenting low satisfaction scale scores increases 19.09 times if we leave the patient with neutral alignment by aHKA. Similarly, changing the arithmetic axis increases the risk of low satisfaction scores by 9.91 times.
Binomial logistic regression for the second section shows us that the most important factor for scoring greater than 68pts is postoperative LDFA.

Conclusions

Our study shows that residual varus by HKA and aHKA as well as undercorrection of LDFA increases the satisfaction score after surgery, however, increased LDFA is the most important factor with statistically significant difference.

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Effect of Direct Adductor Canal Block Performed by a Surgeon in a Patient Who Underwent Simultaneous Bilateral TKA ePoster Presentation Man-Soo Kim, MD, PhD, KOREA, REPUBLIC OF Dongho Kwak, MD, KOREA, REPUBLIC OF Sungcheol Yang, MD, KOREA, REPUBLIC OF Hyukjin Jang, MD, KOREA, REPUBLIC OF Ryu Kyoung Cho, MD, KOREA, REPUBLIC OF Yong In, MD, PhD, KOREA, REPUBLIC OF
Accuracy of the Component Alignment and Sizing in Total Knee Arthroplasty: Preoperative Templating and Postoperative Evaluation Using CT-Based 3D Pre-Operative Planning Software ePoster Presentation Takayuki Koya, MD, PhD, JAPAN Atsushi Sato, MD, PhD, JAPAN Jun Oike, MD, PhD, JAPAN Masataka Ota, MD, JAPAN Kanako Izukashi, MD, JAPAN Takayuki Okumo, MD, PhD, JAPAN Saki Yagura, MD, JAPAN Naoki Okuma, MD, JAPAN Fumiyoshi Kawashima, MD, JAPAN Hiroshi Takagi, MD, PhD, JAPAN Koji Kanzaki, Prof., JAPAN
Does 1000 Mg Ferric Carboxylate Maltose Have an Additional Benefit on the Haemoglobin Recovery Post Total Knee Arthroplasty? - A Comparison with 500 Mg of Ferric Carboxymaltose ePoster Presentation Adit Rajesh Maniar, MBBS, MS Orthopaedics, DNB Orthopaedics, INDIA Ashwini Khokhar, MS, INDIA Akshay Nayak, M.B.B.S, M.S , INDIA Naveen Chandar, MBBS, INDIA Abhinav Mishra, MS, DNB, INDIA Rajesh Maniar, INDIA
Comparative Analysis Of Time Taken In Conventional vs. Robotic Assisted Total Knee Arthroplast ePoster Presentation Sanjay B. Londhe, MS, FRCS, FRCSI, MCh, INDIA Santosh Chandrashekar Shetty, MS, INDIA Ashit Hasmukhbhai Shah, FRCS Orth, M ChOrth, M S Orth, D N B Orth, INDIA Niraj Vora, MS,MRCS, INDIA Vijay Shetty, MD, MSc, FRCSC, INDIA Rakesh Nair, MS, INDIA Clevio Joao Baptista Desouza, MD, INDIA Farheen Khan, B.Tech, INDIA
Effect of Restricted Kinematic Alignment Total Knee Arthroplasty on Coronal Plane Alignment Of The Ankle Joint ePoster Presentation Bartosz Michał Maciąg, MD, POLAND Marcin Łapiński, MD, POLAND Tomasz Mrozek, MD, POLAND Adrian Góralczyk, MD, POLAND Maciej Swiercz, MD, POLAND Grzegorz Maciąg, POLAND Krystian Żarnovsky, POLAND Olga Adamska, POLAND Artur Stolarczyk, MD, PhD, POLAND
Compliance and Outcome of Osteoporosis Treatment After Total Knee Arthroplasty ePoster Presentation Yun Seong Choi, MD, KOREA, REPUBLIC OF Seung Hoon Lee, MD, KOREA, REPUBLIC OF Jung Ro Yoon, MD, KOREA, REPUBLIC OF Young Bin Shin, MD, KOREA, REPUBLIC OF Tae Hyuk Yoon, MD, KOREA, REPUBLIC OF
Subtalar Joint Compensation using Full-length Standing Lower Extremity Anteroposterior Radiograph after Total Knee Arthroplasty for Varus Osteoarthritis in Nara Medical University Hospital with 2-year Follow-up ePoster Presentation Jerre Co De Guzman, MD, PHILIPPINES Munehiro Ogawa, MD, PhD, JAPAN Yusuke Ozaki, MD, JAPAN Yasuhito Tanaka, Prof., JAPAN Yuki Nishimura, MD, JAPAN Maria Elizabeth Mercado, MD, MAS, PHILIPPINES
Diagnosis of Central Sensitization and Its Effects on Postoperative Outcomes Following Total Knee Arthroplasty: A Systematic Review and Meta-Analysis ePoster Presentation Man-Soo Kim, MD, PhD, KOREA, REPUBLIC OF Dongho Kwak, MD, KOREA, REPUBLIC OF Sungcheol Yang, MD, KOREA, REPUBLIC OF Hyukjin Jang, MD, KOREA, REPUBLIC OF Ryu Kyoung Cho, MD, KOREA, REPUBLIC OF Yong In, MD, PhD, KOREA, REPUBLIC OF
Novel Technique For Surgeon-Placed Nerve Block And Continuous Nerve Block In Total Knee Arthroplasty. A Cadaveric Study ePoster Presentation Daniel E Matthews, MD, FAAOS, UNITED STATES
Patellofemoral Arthroplasty In Community Programs: Case Series of 425 Patients ePoster Presentation Alexander P. Sah, MD, UNITED STATES

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Impact of Femur Correction on the Mechanical Alignment of the Total Knee Prosthesis

Impact of Femur Correction on the Mechanical Alignment of the Total Knee Prosthesis

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Impact of Femur Correction on the Mechanical Alignment of the Total Knee Prosthesis

Impact of Femur Correction on the Mechanical Alignment of the Total Knee Prosthesis

Background

Purpose

Material And Methods

Results

Conclusions

More 2023 ISAKOS Congress Content