Summary: We investigated the mid- to long-term outcomes of 22 patients (23 knees) who underwent OWHTO, finding that while regenerated cartilage quality did not significantly affect X-ray measurements, VAS, or JKOM scores, better tissue regeneration was associated with improved JKOOS "symptoms" scores.

【Introduction】
We previously reported that the histological assessment of regenerated cartilage tissue at the time of screw removal after OWHTO did not affect clinical outcomes two years postoperatively. However, its impact on mid- to long-term outcomes remains unclear. Therefore, we aimed to clarify the relationship between regenerated cartilage tissue and mid- to long-term outcomes.

【Methods】
The study included patients who consented to biopsy of regenerated tissue during screw removal after OWHTO and were followed up for more than five years postoperatively. The regenerated tissue was classified into two groups: "good" with an ICRS II scoring system total score of 50 or more, and "poor" with a score below 50. At the final follow-up, we assessed plain X-rays (KL classification, %MA, FTA, PS), VAS, and patient-reported outcomes (JKOM, JKOOS), and compared the two groups (t-test, χ² test, p<0.05).

【Results】
Of the 28 knees, 23 knees were followed up for more than five years. There were 11 knees in the good group and 12 knees in the poor group, with an average follow-up period of 75.1 months. No significant differences were observed between the two groups in the various X-ray measurements at the final follow-up. Additionally, there were no significant differences between the groups in VAS and JKOM. However, in JKOOS, the good group had significantly higher scores in the "symptoms" category.

【Conclusion】
We examined the mid- to long-term outcomes of 22 cases (23 knees) that underwent biopsy during screw removal after OWHTO. Good tissue regeneration was found to affect some aspects of JKOOS in the mid- to long-term.

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Knee Adduction Moment During Gait Vs. Radiographic Alignment Parameters: HTO Optimal Target From A Dynamic Perspective ePoster Presentation Kee Soo Kang, MD, KOREA, REPUBLIC OF Na-Kyoung Lee, MD, PhD, KOREA, REPUBLIC OF Sohyeon Jeon, KOREA, REPUBLIC OF Shi Eun Lee, RN, KOREA, REPUBLIC OF Ja-Young Choi, MD, PhD, KOREA, REPUBLIC OF Seung-Baik Kang, MD, PhD, Prof., KOREA, REPUBLIC OF Chong Bum Chang, MD, PhD, KOREA, REPUBLIC OF
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Support Instruments Provide Remarkable Stability in Medial Closed Wedge Distal Femoral Osteotomy -A Finite Element Analysis- ePoster Presentation Umito Kuwashima, MD, PhD, JAPAN Masafumi Itoh, MD, PhD, JAPAN Junya Itou, MD, PhD, JAPAN Ken Okazaki, MD, PhD, JAPAN
Measuring Osteotomy Wedge Angle Is More Important Than Measuring Wedge Height In Open Wedge Osteotomies Around The Knee ePoster Presentation Julius Watrinet, MD, Dr. med., GERMANY Johannes Schlaich, Stud., GERMANY Romed Peter Vieider, MD, GERMANY Marco-Christopher Rupp, MD, GERMANY Julian Mehl, MD, GERMANY Sebastian Siebenlist, MD, MHBA, Prof., GERMANY Armin Runer, PD MD, GERMANY
The Impact Of Medial Opening Wedge High Tibial Osteotomy On Patellar Height And Tibial Tubercle – Trochlear Groove Distance: Prospective Analysis Of 54 Consecutive Cases. ePoster Presentation Coral Castillejo Iniesta, MD, SPAIN Giacomo Dal Fabbro, MD, AUSTRALIA Margherita Bonaiuti, PhD, ITALY Claudio Belvedere, PhD, ITALY Alberto Leardini, DPhil, ITALY Fabio Norvillo, ITALY Alberto Grassi, PhD, ITALY Stefano Zaffagnini, MD, Prof., ITALY Fulvia Taddei, ENG, ITALY

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Correlation Between Histological Assessment of Regenerated Articular Cartilage and Mid- to Long-Term Clinical Outcomes After Open-Wedge High Tibial Osteotomy

Correlation Between Histological Assessment of Regenerated Articular Cartilage and Mid- to Long-Term Clinical Outcomes After Open-Wedge High Tibial Osteotomy

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Correlation Between Histological Assessment of Regenerated Articular Cartilage and Mid- to Long-Term Clinical Outcomes After Open-Wedge High Tibial Osteotomy

Correlation Between Histological Assessment of Regenerated Articular Cartilage and Mid- to Long-Term Clinical Outcomes After Open-Wedge High Tibial Osteotomy