Comparative Histopathological Analysis of Nasal Osteotomy Techniques in a Rabbit Model.

Abstract

Objective: Nasal osteotomy is a crucial step in rhinoplasty, explicitly addressing the open roof deformity in nasal bones. This study aimed to assess and compare the recovery patterns associated with 4 distinct osteotomy techniques in a rabbit model. Materials and Methods: Twenty white New Zealand rabbits weighing 2.5 to 3.0 kg were included in the study. Median osteotomies were performed on the left side using piezosurgery and on the right side using an oscillating micro-saw. Additionally, internal osteotomy was executed on the right side and external osteotomy on the left side, both performed with a chisel across all rabbits. Ten rabbits were sacrificed on the 7th day, while the remaining 10 were sacrificed on the 15th day for subsequent histological examination. The granulation tissue formation (GTF), vascularization, inflammation, collagen fibril content, osteotomy gap width, and new bone formation were evaluated in hematoxylin and eosin and Masson's trichrome-stained sections. Results: On the 7th day, piezosurgery demonstrated statistically-significant advantages in terms of GTF, neovascularization, and collagen fibril quantity when compared to the oscillating micro-saw (P < .05). Furthermore, a statistically-significant difference was observed among the groups concerning the distribution of connective tissue organization between the 7th and 15th days (P < .05). Conclusions: This study's findings unequivocally establish that bone healing after osteotomy with piezosurgery surpasses that achieved with an oscillating micro-saw in this rabbit model.