| Popis: |
The aim of this study was to investigate the effects of hyaluronic acid-carboxymethylcellulose (HA-CMC) membrane on the healing process of wounds in rats. One hundred animals were assigned randomly into two equal groups. Midline laparotomies were performed. In group 1, a 5-cm x 3-cm piece of HA-CMC membrane was placed under the laparotomy incision. The same procedure was performed in group 2, but without the HA-CMC membrane. Ten animals from each group were euthanized on postoperative days (POD) 4, 7, 14, 21, and 35 after wounding. Breaking strength, histologic examination, and tissue hydroxyproline levels were analyzed. The tensiometric test showed that there was no significant difference in the breaking strengths between the two groups (P0.05). Statistical difference was found to be significant on POD 4, 14, 21, and 35 when the groups were compared with regard to average hydroxyproline levels (P0.05). Significant differences were found in the results of histologic examination of the tissue specimens between the two groups in terms of acute inflammation on POD 14, chronic inflammation, and granulation tissue fibroblast maturation on POD 35, collagen deposition on POD 21, and neovascularization on POD 7, 14, 21, and 35 (P0.05). The results show that the HA-CMC membrane did not negatively affect the mechanical strength and healing process of the laparotomy incisions. |
