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The Vascularization Course of Labral Autograft and Its Effect on Tissue Healing: Acetabular Labral Augmentation Versus Labral Reconstruction in a Porcine Model.
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- Author(s): Su, Tiao; Ao, Yunong; Yang, Liu; Chen, Guang-xing
- Source:
American Journal of Sports Medicine; Aug2022, Vol. 50 Issue 10, p2647-2658, 12p- Subject Terms:
WOUND healing; KRUSKAL-Wallis Test; STATISTICS; CARTILAGE cells; SMOOTH muscle; ANIMAL experimentation; IMMUNOHISTOCHEMISTRY; PLASTIC surgery; SWINE; SURGICAL complications; POSTOPERATIVE care; AUTOGRAFTS; TREATMENT effectiveness; HIP joint injuries; TISSUES; DESCRIPTIVE statistics; STATISTICAL hypothesis testing; RESEARCH funding; ARTICULAR cartilage; DATA analysis software; DATA analysis; ANTIGENS - Source:
- Additional Information
- Abstract: Background: The preservation of the native labral vascularization is assumed to be the potential advantage of acetabular labral augmentation, the effect of which remains unknown. Purpose: To identify the vascular distribution within the labral autograft and its effect on the healing process between labral augmentation (AUG) and reconstruction (RECON) in a porcine model. Study Design: Controlled laboratory study. Methods: A total of 36 pigs randomly underwent unilateral labral augmentation or reconstruction (AUG group, n = 18; RECON group, n = 18). The pigs were randomly sacrificed at 6, 12, and 24 weeks postoperatively. The labral autografts were harvested for macroscopic evaluation and histologic assessment. The labral autograft was zoned into 2 halves to observe the vascular distribution: the capsular half (zone I) and the articular half (zone II). Each zone was divided into 2 parts: the peripheral part (IA and IIA) and the part attached to the acetabulum (IB and IIB). Results: At 6 weeks, there existed more vascular ingrowth in zone I, whereas zone IIB appeared nearly avascular in both groups. At 12 weeks, the area with the greatest vascularity was zone II in the RECON group and zone IA in the AUG group. The vascularity was concentrated at zones IA and IIA in both groups at 24 weeks. The labral autografts were hypertrophic with sufficient filling of the labral defect in both groups at 6 weeks. At 12 weeks, an insufficient volume of the articular half was observed in 3 of 6 labral autografts in the RECON group, while all autografts remained well integrated with the chondrolabral junction in the AUG group. At 24 weeks, unsatisfactory merging of the labral autograft with the cartilage at the articular side was found in 2 of 6 labral autografts in the RECON group, which was not observed in the AUG group despite the sufficient volume of autografts labrum in both groups. Conclusion: Slow vascular ingrowth within the articular half might account for the poor healing of the reconstructed labral autograft. Labral augmentation provides the possibility of better tissue healing because of the preservation of the original chondrolabral junction compared with labral reconstruction. Clinical Relevance: Labral augmentation might be a feasible alternative to labral reconstruction under the condition of viable labral remnants. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of American Journal of Sports Medicine is the property of Sage Publications Inc. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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