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Abstract #10623 Published in IGR 6-2

Deep sclerectomy with various implants: an experimental and histopathologic study in a rabbit model

Erkilic K; Ozkiris A; Evereklioglu C; Kontas O; Guler K; Dogan H
Ophthalmologica 2004; 18: 264-9


BACKGROUND AND OBJECTIVE: To investigate the effectiveness of various implants used in experimental deep sclerectomy and to report tissue reactions developed to these implants histopathologically. MATERIALS AND METHODS: Forty eyes of 40 New Zealand white albino rabbits underwent deep sclerectomy with various implants. The rabbits were divided into four groups; each consisted of 10 eyes. Deep sclerectomy was performed using copolymer materials in group 1, silicone materials in group 2 and chromic catgut suture in group 3. No implants were used in the control group (group 4). Clinical and histopathological examinations were performed to investigate the effectiveness of implants. RESULTS: Mean preoperative intraocular pressure (IOP) was 14.4 ± 1.6 mmHg in group 1, 14.5 ± 1.8 mmHg in group 2, 13.8 ± 1.5 mmHg in group 3 and 14.5 ± 1.2 mmHg in group 4. The final postoperative IOPs were 10.7 ± 0.9, 10.6 ± 0.8, 13.5 ± 1.0, and 14.5 ± 1.4 mmHg, respectively. At 2 months, the decrease in IOPs from baseline and the persistence of the filtering bleb were significantly marked in group 1 and group 2 (p < 0.001). Histopathological evaluation revealed that copolymer and silicone materials formed a smooth and regular intrascleral space. There were no foreign body reaction, tissue destruction or fibrosis in group 1 and group 2, but chromic catgut sutures caused severe fibrosis and inflammatory reaction in group 3. Mean histopathologic score of group 1, group 2, group 3 and group 4 was 0.7 ± 0.5, 0.8 ± 0.5, 2.4 ± 0.6, and 0.1 ± 0.3, respectively. CONCLUSION: Copolymer or silicone materials may increase the success rate of surgery by maintenance of a large and regular intrascleral space after deep sclerectomy and prevention of collapse of the flap.

Department of Ophthalmology, Erciyes University Medical Faculty, Kayseri, Turkey.


Classification:

12.8.3 Non-perforating (Part of: 12 Surgical treatment > 12.8 Filtering surgery)



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