Affiliation:
1. Department of Plastic and Reconstructive Surgery, Peking University Third Hospital , Beijing , China
2. Twelfth Department of Plastic Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing , China
Abstract
Abstract
Background
Historically, research of diced cartilage for rhinoplasty has mainly explored the efficacy of wrapped materials, with few studies dedicated to various sizes of diced cartilage.
Objectives
The authors of this study sought to evaluate the viability and stability of various-sized free diced cartilage.
Methods
The remaining costal cartilage was harvested during rhinoplasties and implanted into subcutaneous pockets on the backs of nude mice: shaved cartilage (group A, n = 8), diced cartilage with a diameter <0.5 mm (group B, n = 8), 0.5 to 1.0 mm (group C, n = 8), and 1.0 to 1.5 mm (group D, n = 8). After 12 weeks, weight and volume retention rates, histopathological examinations, and biomechanical properties were evaluated.
Results
Cartilage grafts in groups A and B showed an obvious loss of contour and severe dispersion. The weight and volume of cartilage graft in group A were significantly decreased (all P < 0.05). Although there was no significant difference, group D (122.8 ± 15.4%) achieved the highest weight retention rate compared with groups B and C (114.6 ± 7.1% and 114.3 ± 10.1%, respectively). Group A showed the most apparent chondrocyte nucleus loss with the least peripheral proliferation, and group D showed the best regeneration potential (all P < 0.05). Group C achieved less chondrocyte nucleus loss than group B (P < 0.05). The compressive elastic modulus increased with the diameter of diced cartilage (all P < 0.05).
Conclusions
Diced cartilage with a diameter of 1.0 to 1.5 mm may have the highest viability and stability, followed by those of 0.5 to 1.0 mm and <0.5 mm.
Publisher
Oxford University Press (OUP)
Cited by
2 articles.
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