Histologic evaluation of the immediate effects of diamond burr debridement in experimental superficial corneal wounds in dogs

Enry Garcia da Silva, Cynthia C. Powell, Juliet R. Gionfriddo, E. J. Ehrhart, Ashley E Hill

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Purpose To evaluate the corneal changes immediately after diamond burr debridement of superficial corneal wounds in dogs. Spontaneous chronic corneal epithelial defects (SCCEDs) are the most common form of canine recurrent corneal ulcers. The diamond burr has been used in the management of corneal lesions in humans since 1983. Recently, it has been successfully used in the treatment of SCCEDs in dogs; however, little has been documented as to its mechanism of action. Methods Five adult female research dogs euthanized for reasons unrelated to the study were included, providing 10 normal eyes. An excimer laser spatula was used for epithelial removal after delineation with an 8mm punch biopsy trephine. Diamond burr debridement was performed for 30 and 45s in five eyes each (groups 1 and 2 respectively). The procedure was performed on the ventral half of the experimental defect as well as ventral normal cornea, immediately after euthanasia, and prior to enucleation. Samples were processed routinely for histologic evaluation and stained with periodic acid-Schiff. Results No stromal defects could be identified under light microscopy. In experimental corneal wounds, multi-focal areas remained covered by the epithelial basement membrane (BM) after diamond burr treatment in both groups (group 1=48%±16SD, group 2=26%±12SD). Removal of BM on group 2 was significantly higher than group 1 (P<0.05). Conclusions The diamond burr allows a safe method of debridement and does not create defects beyond the epithelial BM in corneal wounds in normal dogs. Evaluation of the diamond burr debridement in cases of SCCEDs is warranted.

Original languageEnglish (US)
Pages (from-to)285-291
Number of pages7
JournalVeterinary Ophthalmology
Volume14
Issue number5
DOIs
StatePublished - Sep 2011
Externally publishedYes

Keywords

  • Corneal ulcer
  • Debridement
  • Diamond burr
  • Indolent
  • Recurrent
  • SCCEDs

ASJC Scopus subject areas

  • veterinary(all)

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