Introduction.
Contribution of tibial malrotation to hip joint kinematics and impingement, especially with certain activities, is poorly understood. Tibial malrotation treatment includes Distal Tibial Derotation Osteotomy (DTDO). We aimed to determine DTDO clinical effectiveness in patients with hip symptoms.

Materials.
A review of patients undergoing DTDO between 2018-2020. DTDO was routinely stabilised with tibial plate (EVOS,S&N). We reviewed our management of tibial torsion and associated ipsilateral pathology: MRI-defined intra-articular pathomorphology (CAM/pincer) and non-CAM/pincer-related labral tears, as well as excessive combined femoral/acetabular version (McKibbin Index (MI) >50o). If presenting symptoms resolved, patients were discharged at 1year.

Results.
27 patients underwent DTDO for hip pain, 3 – for hip and knee pain. Mean tibial torsion was 48.6o (41-63o). Average age–27years (18-44), average follow-up–20months (3-36).
Thirteen patients (43%) had a co-existent CAM/pincer and 7 (23%) – excessive MI (51-76o). Of 13 CAM/pincer patients post-DTDO:
• 2 patients settled (discharged)
• 4 had hip arthroscopy prior to DTDO
- 1 settled post-DTDO (discharged)
- 3 are persistently symptomatic <1yr follow-up, including 1 with excessive MI (51o)
• 3 with persistent hip symptoms >1yr post-DTDO underwent and 1 awaits hip arthroscopy (all with normal MI)
• 4 patients <1yr post-DTDO are improving.
Of 17 non-CAM/pincer patients:
• 4 had labral tears
- 2 settled post-DTDO (discharged)
- 2 – clinically improving (<1yr follow-up)
• 7 had excessive femoral/acetabular version
- 2 – discharged
- 5 – under review (<1yr follow-up)
• 6 others discharged
• no direct hip interventions were required to date.
Four patients required plate removal, no complications were identified.

Conclusion.
Patients with rotational malalignment frequently present with multi-level deformity and high prevalence of co-existent CAM/pincer. Hip arthroscopy for intra-articular pathology prior to malrotation correction is likely to fail. Malrotation correction should be prioritised. Significant proportion of symptomatic hip impingement patients (=45%) improve with tibial derotation.

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A Comparison Of Perioperative Outcomes Between Patients Who Underwent Hip Arthroscopy With And Without The Pericapsular Nerve Group Block ePoster Presentation Albert A Yusupov, MD, UNITED STATES Iciar M Davila Castrodad, MD, UNITED STATES Matthew J. Kraeutler, MD, UNITED STATES Christopher J Mazzei, MD, UNITED STATES Stephen A. Hunt, MD Kimberly V Tucker, MD, UNITED STATES Anthony Scillia, UNITED STATES Patrick A Armstrong, MD, UNITED STATES Mathew S Chow, MD, UNITED STATES Richard A Stennett, MD, UNITED STATES James C Wittig, MD
Solving Social Inequality In Surgical Outcomes By Combining Standardized Treatment And Individualized Patient Education ePoster Presentation Benjamin Saks, MD, UNITED STATES Vivian Ouyang, BS, UNITED STATES Andrew Jimenez, MD, UNITED STATES Ajay C. Lall, MD, MS, FAAOS, UNITED STATES Benjamin G. Domb, MD, UNITED STATES
Persistent Post-Operative Opioid Use Following Hip Arthroscopy Is Common And Is Associated With Pre-Operative Opioid Use And Age ePoster Presentation Ryan M. Degen, MD, FRCSC, CANADA J. Andrew McClure, MSc, CANADA Britney Le, MSc, CANADA Blayne Welk, MD, CANADA Jacquelyn Marsh, PhD, CANADA
No Association Between Intrauterine Contraceptive Devices and Musculoskeletal Hip Joint Pain Abstract Presentation 5 minutes Nathan Varady, MD, MBA, UNITED STATES Paul F Abraham, BS, UNITED STATES Michael Peter Kucharik, BS, UNITED STATES Christopher T Eberlin, BS, UNITED STATES David Freccero, MD, UNITED STATES Eric L. Smith, MD, UNITED STATES Scott D Martin, MD, UNITED STATES
The Radiographical Influence Of Torsional Deformity Of The Acetabular And Femur In Dysplastic Hips ePoster Presentation Carsten Heimer, BA, GERMANY Carsten Perka, MD, PhD, GERMANY Henrik Baecker, MD, GERMANY
Mortality After Hip Or Knee Arthroplasty For Osteoarthritis In Chile ePoster Presentation Maximiliano Andres Barahona, MD, MSc, CHILE Cristian Barrientos, MD, CHILE Alvaro Martinez, MD, CHILE Julian Brañes, MD, CHILE Juan Pablo Prieto, MD, CHILE Jaime Hinzpeter, MD, CHILE
Arthroscopic Tendon Release for Iliopsoas Impingement after Total Hip Arthroplasty ePoster Presentation Michael Andreas Finsterwald, MD, AUSTRALIA Georgina Waters, MD, AUSTRALIA Jay R. Ebert, PhD, AUSTRALIA Christopher W. Jones, FAOrthA FRACS PhD MBBS(Hons) BEng(Hons) BCom, AUSTRALIA Piers Yates, MBBS(Hons) BSc(Hons) MRCS(Eng) FRCS(Tr & Orth) FRA, AUSTRALIA Peter Alberto D'Alessandro, MBBS Hons. (UWA) FRACS FAOrthA, AUSTRALIA
Treatment Modalities And Outcomes Following Acetabular Fractures In The Elderly: A Systematic Review Abstract Presentation 3 minutes Brian McCormick, MD, UNITED STATES Joseph Serino, MD, UNITED STATES Sebastian Orman, MD, UNITED STATES Alex R. Webb, MD, UNITED STATES David X. Wang, MD, UNITED STATES Sharri Mortenson, MD, UNITED STATES Arvind Von Keudell, MD, UNITED STATES
Promis Validation In Hip Arthroscopy: A Shift Towards Reducing Survey Burden Abstract Presentation 4 minutes Erik Gerlach, MD, UNITED STATES Ryan S. Selley, MD, UNITED STATES Daniel Johnson, MD, UNITED STATES Richard W. Nicolay, MD, UNITED STATES Gregory Versteeg, MD, UNITED STATES Mark Andrew Plantz, BS, UNITED STATES Peter Swiatek, MD, UNITED STATES Eric Sanders, MD, UNITED STATES Bejan Alvandi, MD, UNITED STATES Vehniah K. Tjong, MD, FRCSC, UNITED STATES Michael Terry, MD, UNITED STATES
Stem Cells Injection And Percutaneous Femoral Head Decompression - An Extremely Rare Procedure With Good Results ePoster Presentation Sofia Moura De Carvalho, MD, PORTUGAL Inês Domingues, MD, PORTUGAL Liliana Domingues, MD, PORTUGAL Eduardo Ramalho Silva, MD, PORTUGAL Gonçalo Lavareda, MD, PORTUGAL Filipe Machado, MD, PORTUGAL Rita Ricardo, MD, PORTUGAL
Assessing Risk Of Osteonecrosis Of The Hip Following Intraarticular Injections: Hyaluronic Acid Versus Corticosteroid Abstract Presentation 5 minutes Nathan Varady, MD, MBA, UNITED STATES Ahab Chopra, BA, UNITED STATES Paul F Abraham, BS, UNITED STATES Michael Peter Kucharik, BS, UNITED STATES Christopher T Eberlin, BS, UNITED STATES David Freccero, MD, UNITED STATES Eric L. Smith, MD, UNITED STATES Scott D Martin, MD, UNITED STATES
Covid Mortality Among Neck Of Femur Fractures During The Pandemic 2019 Abstract Presentation 5 minutes Aashish Raghu, MBBS, MS, MRCS, FRCS (Tr & Orth), UNITED KINGDOM Anas Hassan, MBBS, MRCS, UNITED KINGDOM Nicholas Dr Roeck, MB ChB, FRCS (ENG), FRCS (Tr&Orth), UNITED KINGDOM Mohamed Antar, MBBS, Master of Orthopaedics, MRCS, UNITED KINGDOM
Effect Of Femoral And Acetabular Version On Outcomes Following Hip Arthroscopy: A Systematic Review And Meta-Analysis Abstract Presentation 9 minutes Casey Wang, MD, CANADA Dan Cohen, MD, CANADA Jeffrey Kay, MD, CANADA Mahmoud Almasri, MD, FRCSC, UNITED STATES Nicole Simunovic, MSc, CANADA Carlomagno Cardenas-Nylander, MD, SPAIN Anil S. Ranawat, MD, UNITED STATES Olufemi R. Ayeni, MD, PhD, MSc, FRCSC, CANADA

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Can Hip Pain Be Treated With Tibial Malrotation Correction?

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Can Hip Pain Be Treated With Tibial Malrotation Correction?

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