The effect of poly-p-dioxanone plates on the protection and vitality of cartilage: An animal study.

OBJECTIVES/HYPOTHESIS: In septorhinoplasty, septal, auricular, and costal cartilage are often used as autologous graft. Autologous grafts are preferred in nasal reconstruction. The aim of this study was to histopathologically examine the tissue compatibility and the effect on the stability and cartilage vitality of poly-p-dioxanone (PDS) plates.

STUDY DESIGN: Ten adult New Zealand rabbits were used.

METHODS: Ten New Zealand rabbits were used. Septal and auricular cartilage sections were removed; one of the two cartilage grafts was left plain, and the other was sutured to a PDS plate. Grafts were placed into the back of the rabbits. After 12 weeks, the graft material was examined microscopically.

RESULTS: The specimens did not cause any significant foreign body reaction. Within 3 months, a significant degree of color, stability, and stiffness was lost. Microscopically, inflammation, necrosis, and cartilage cell degeneration scores were statistically significantly lower in the grafts using PDS (P < .05), and the vascularization, collagen, and cartilage proliferation scores were found to be statistically significantly higher (P < .05). No statistically significant difference was determined in respect of the bone proliferation scores (P > .05).

CONCLUSIONS: The use of PDS plates together with cartilage provided mechanical support to the graft. Therefore, changes that disrupt the integrity of the graft, such as inflammation, necrosis, and cartilage cell degeneration, were reduced, and changes that provide greater stability, such as vascularization, collagen, and cartilage proliferation, were increased.

LEVEL OF EVIDENCE: NA Laryngoscope, 2018.