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Large Reduction In Postoperative Posterior Tibial Slope Risks Anterior Collapse Of The Tibial Component In Fixed-Bearing Unicompartmental Knee Arthroplasty

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Large Reduction In Postoperative Posterior Tibial Slope Risks Anterior Collapse Of The Tibial Component In Fixed-Bearing Unicompartmental Knee Arthroplasty

Kazuhisa Hatayama, MD, PhD, JAPAN Masanori Terauchi, MD, JAPAN Shingo Kurihara, MD, JAPAN Satoshi Nonaka, MD, JAPAN Hibiki Kakiage, MD, JAPAN

Gunma central hospital, Maebashi, Gunma, JAPAN

2023 Congress ePoster Presentation 2023 Congress Not yet rated

Anatomic Location

Knee

Diagnosis / Condition

Osteoarthritis

Treatment / Technique

Arthroplasty

Anatomic Structure

Bones

Diagnosis Method

X-ray

Summary: Large reduction in postoperative posterior tibial slope in UKA should be avoided because it is associated with anterior collapse of the tibial component.

Background

Although the posterior tibial slope (PTS) of tibial component in unicompartmental knee arthroplasty (UKA) is recommended to be between 3 º and 7º, variations in preoperative PTS are wide. The purpose of this study was to evaluate the influence of the changes in preoperative and postoperative PTS on clinical outcomes.

Methods

One-hundred and eighty-two knees that underwent medial fixed-bearing UKA were evaluated retrospectively. The mean follow-up period was 36.4 ± 13.2 months (range, 24 to 63 months). Pre- and postoperative PTS were measured on lateral radiographs. Knees were classified in the large reduction group if the postoperative PTS was reduced by more than 5º compared with the preoperative value and in the small reduction group if not. Knee flexion angle and 2011 Knee Society Knee Scoring System (KSS 2011) were evaluated at last follow-up of at least 2 years.

Results

Thirty-three knees were classified in the large reduction group and 149 knees were classified in the small reduction group. The pre and postoperative PTS of large and small reduction groups were 10.9 ± 2.2, 3.6 ± 2.4 degrees and 7.7 ± 2.7, 7.1 ± 2.4 degrees, respectively. Flexion angle and KSS 2011 were not significantly different between the groups. However, the incidence of anterior collapse of the tibial component in the large group was significantly higher than the other group (P<0.001).

Conclusion

Although the knee flexion angle and PROMs at the last follow-up were not significantly different between the groups, large reduction in postoperative posterior tibial slope may be associated with anterior collapse of the tibial component in UKA. This study shows one potential benefit for matching native slope.

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Hip-Knee-Ankle Angle Affects Medial and Lateral Tibiofemoral Compressive Forces More Significantly than Joint Line Obliquity in Patients Post Total Knee Arthroplasty ePoster Presentation David A. Parker, MBBS, BMedSc, FRACS, AUSTRALIA Myles R. J. Coolican, FRACS, AUSTRALIA Brett A. Fritsch, MBBS BSc(Med), FRACS, FAOrthA, AUSTRALIA Alexander S. Nicholls, MSc, FRACS, AUSTRALIA Payam Tarassoli, MBChB, BSc, DipSEM, MD, FRCS, AUSTRALIA Yoong Lim, BEng, PhD, AUSTRALIA
Implant Size and Outcome Differences of Knees in Same Patient for Simultaneous vs Staged Bilateral TKA ePoster Presentation Alexander P. Sah, MD, UNITED STATES
Antero-Posterior Translation of Mobile-Bearing in Mobile-Bearing Unicompartmental Knee Arthroplasty ePoster Presentation Takahiro Arakawa, MD, JAPAN Kenichi Kono, MD, PhD, JAPAN Tetsuya TOMITA, MD, PhD, JAPAN Shuji Taketomi, MD, PhD, JAPAN Ryota Yamagami, MD, JAPAN Kohei Kawaguchi, MD, PhD, JAPAN Tomofumi Kage, JAPAN Ryo Murakami, MD, JAPAN Hiroshi Inui, PhD, JAPAN Sakae Tanaka, MD, PhD, JAPAN
Bicruciate Substituting Total Knee Arthroplasty Improved Anteroposterior Displacement in Mid-Flexion Range ePoster Presentation Keinosuke Ryu, Prof., JAPAN Takanori Iriuchisima, MD, JAPAN
Is Surgeon Assessed Bone Quality During Total Knee Arthroplasty a Valid Tool To Diagnose Osteoporosis ? ePoster Presentation Adit Rajesh Maniar, MBBS, MS Orthopaedics, DNB Orthopaedics, INDIA Arpit Vasantbhai Bavaskar, MBBS, D.Orth., INDIA Vishal Raina, MS, INDIA Akshay Nayak, M.B.B.S, M.S , INDIA Ashwini Khokhar, MS, INDIA Rajesh Maniar, INDIA
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
Three-Dimensional Evaluation of Distal Femoral Valgus Angle Using Whole Leg CT in Total Knee Arthroplasty ePoster Presentation Atsushi Sato, MD, PhD, JAPAN Jun Oike, MD, PhD, JAPAN Masataka Ota, MD, JAPAN Kanako Izukashi, MD, JAPAN Saki Yagura, MD, JAPAN Takayuki Okumo, MD, PhD, JAPAN Naoki Okuma, MD, JAPAN Takayuki Koya, MD, PhD, JAPAN Fumiyoshi Kawashima, MD, JAPAN Hiroshi Takagi, MD, PhD, JAPAN Koji Kanzaki, Prof., JAPAN
Short-Term Clinical Outcome Of Functionally Aligned Robotic-Assisted BCS TKA is Better Than That Of Mechanically Aligned Navigation-Assisted BCS TKA ePoster Presentation Daisuke Hamada, MD, PhD, JAPAN Keizo Wada, MD, JAPAN Yasuaki Tamaki, MD, JAPAN Yasuyuki Omichi, MD, JAPAN Tomohiro Goto, MD, PhD, JAPAN Koichi Sairyo, MD, PhD, JAPAN
Phenotypic Differences In Coronal Alignment In Robot-Assisted Total Knee Arthroplasty Do Not Affect Patient-Reported Outcome Measurements In A Three-Dimensional Computed Tomography Analysis: A Single-Center Cohort Study ePoster Presentation Takao Kaneko, MD, PhD,, JAPAN Ayakane Yamamoto, MD, JAPAN Kazutaka Takada, MD, JAPAN Shu Yoshizawa, MD, JAPAN Hiroyasu Ikegami, MD, PhD, Prof., JAPAN

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Large Reduction In Postoperative Posterior Tibial Slope Risks Anterior Collapse Of The Tibial Component In Fixed-Bearing Unicompartmental Knee Arthroplasty

Large Reduction In Postoperative Posterior Tibial Slope Risks Anterior Collapse Of The Tibial Component In Fixed-Bearing Unicompartmental Knee Arthroplasty

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Large Reduction In Postoperative Posterior Tibial Slope Risks Anterior Collapse Of The Tibial Component In Fixed-Bearing Unicompartmental Knee Arthroplasty

Large Reduction In Postoperative Posterior Tibial Slope Risks Anterior Collapse Of The Tibial Component In Fixed-Bearing Unicompartmental Knee Arthroplasty

Background

Methods

Results

Conclusion

More 2023 ISAKOS Congress Content