PMID- 34437943 OWN - NLM STAT- MEDLINE DCOM- 20220405 LR - 20220509 IS - 1526-3231 (Electronic) IS - 0749-8063 (Linking) VI - 38 IP - 4 DP - 2022 Apr TI - Acellular Matrix-Induced Chondrogenesis Technique Improves the Results of Chondral Lesions Associated With Femoroacetabular Impingement. PG - 1166-1178 LID - S0749-8063(21)00774-X [pii] LID - 10.1016/j.arthro.2021.08.022 [doi] AB - PURPOSE: The study's main objective was to evaluate, in the short-term, the result of the autologous acellular matrix-induced chondrogenesis (AMIC) technique in a selected group of patients with 2-4 cm(2) full-thickness chondral lesions, undergoing hip arthroscopy for femoroacetabular impingement (FAI). METHODS: A retrospective single-center Level IV case series of 25 patients (28 hips) who underwent an arthroscopic hip surgery with a liquid acellular collagen matrix. Inclusion criteria for implantation were FAI diagnosis (cam or pincer type), grade IV chondral lesions (Outerbridge size 2-4 cm(2)); Tonnis stage 0-II, minimum follow-up of 24 months, and 1 year (12-15 months) evaluation with very high field 3-T MRI arthrography. Exclusion criteria were Tonnis III, joint space <2 mm, center-edge angle <20 degrees , and <24 months of follow-up. Clinical assessments involved symptoms duration until surgery, changes in physical and work activity and range of motion, modified Harris Hip Score, reporting percentages of patient acceptable symptomatic state (PASS) and minimal clinically important difference (MCID), pain with a VAS, and level of satisfaction. Radiological assessments: Tonnis stage, articular space, alpha and lateral center edge angle (Wiberg), and generated tissue characteristics at 1 year (based on the MOCART score), through 3-T MRI. RESULTS: 25 patients (28 hips) treated; 19 men and 6 women (mean age: 40.5 years; range: 25-55). Two women underwent joint replacement surgery. Thus, 23 patients (26 hips) were analyzed. At 29 months following surgery (range: 24-48), a significant improvement was obtained in all parameters assessed, focusing on the characteristics of the generated tissue in the MRI (MOCART scores). 95% of the patients met the MCID (improvement >12 points in the modified Harris Hip Score), and 100% scored >74 points, achieving the PASS. Patients' satisfaction was 86.6% (SD 16.4). All patients who practiced sports resumed them. CONCLUSIONS: The liquid AMIC is a safe technique that shows good clinical and radiological outcomes in a 2-year follow-up in patients with femoroacetabular impingement and grade IV acetabular 2-4 cm(2) chondral defects. LEVEL OF EVIDENCE: Level IV, retrospective case series. CI - Copyright (c) 2021 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved. FAU - De Lucas Villarrubia, Jose Carlos AU - De Lucas Villarrubia JC AD - Traumatology and Orthopedic Surgery Department, Hospital Universitario Puerta de Hierro, Majadahonda, Madrid, Spain. Electronic address: jclucasv@hotmail.com. FAU - Mendez Alonso, Miguel Angel AU - Mendez Alonso MA AD - Department of Radiology, Hospital Universitario Puerta de Hierro, Majadahonda, Madrid, Spain. FAU - Sanz Perez, Marta Isabel AU - Sanz Perez MI AD - Traumatology and Orthopedic Surgery Department, Hospital Universitario Puerta de Hierro, Majadahonda, Madrid, Spain. FAU - Trell Lesmes, Fernando AU - Trell Lesmes F AD - Traumatology and Orthopedic Surgery Department, Hospital Universitario Puerta de Hierro, Majadahonda, Madrid, Spain. FAU - Panadero Tapia, Alberto AU - Panadero Tapia A AD - Department of Radiology, Hospital Universitario Puerta de Hierro, Majadahonda, Madrid, Spain. LA - eng PT - Journal Article DEP - 20210824 PL - United States TA - Arthroscopy JT - Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association JID - 8506498 SB - IM MH - Adult MH - Arthroscopy MH - Chondrogenesis MH - Female MH - *Femoracetabular Impingement/complications/diagnostic imaging/surgery MH - Hip Joint/surgery MH - Humans MH - Male MH - Retrospective Studies MH - Treatment Outcome OTO - NOTNLM OT - MOCART OT - acellular collagen matrix OT - cartilage mapping OT - chondral lesion OT - femoroacetabular impingement OT - hip arthroscopy OT - magnetic resonance imaging EDAT- 2021/08/27 06:00 MHDA- 2022/04/06 06:00 CRDT- 2021/08/26 20:14 PHST- 2021/03/25 00:00 [received] PHST- 2021/08/11 00:00 [revised] PHST- 2021/08/11 00:00 [accepted] PHST- 2021/08/27 06:00 [pubmed] PHST- 2022/04/06 06:00 [medline] PHST- 2021/08/26 20:14 [entrez] AID - S0749-8063(21)00774-X [pii] AID - 10.1016/j.arthro.2021.08.022 [doi] PST - ppublish SO - Arthroscopy. 2022 Apr;38(4):1166-1178. doi: 10.1016/j.arthro.2021.08.022. Epub 2021 Aug 24.