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Transmucosal Boston Keratoprosthesis Type II in a Case of Severe Bilateral Chemical Burn.
Cornea 2023 October 32
PURPOSE: The purpose of this report was to describe a new alternative surgical technique combining oral mucosa and the Boston Keratoprosthesis type II (BKPro II) in a patient with severe chemical burn.
METHODS: We present a case of a 37-year-old man who suffered a severe bilateral chemical burn. Visual acuity was light perception and projection in both eyes. After many surgeries, including eyelid reconstruction, eyelashes electrolysis, and amniotic membrane transplants, he presented a corneal thinning in his right eye that was managed with an autologous oral mucosa graft. Considering the limited function of the eyelids, mild symblepharon, and dry ocular surface, we proposed the implantation of a BKPro II. The patient voiced his desire of avoiding complete tarsorrhaphy for better cosmesis. Osteo-odonto-keratoprosthesis or tibial bone keratoprothesis was also discarded at the patient's express wish. A year and a half later, the oral mucosa was transplanted, and once the ocular surface was stabilized, we lift the mucosa 270 degrees and performed the implantation of the BKPro II covering this device with the mucosa trephined avoiding the complete tarsorrhaphy and theraby modifying the standard procedure.
RESULTS: After 34 months of follow-up, the patient did not develop any complications, his visual acuity is stable (0.3 decimal), and funduscopic examination showed a pale optic disk, vascular tortuosity, and an epiretinal membrane that remains stable up to this period.
CONCLUSIONS: Transmucosal BKPro II may be considered as an alternative surgical technique for implant support in BKPro II carriers who want to improve their cosmesis avoiding, avoid complete tarsorrhaphy, and do not want to be exposed to dental or bone surgeries.
METHODS: We present a case of a 37-year-old man who suffered a severe bilateral chemical burn. Visual acuity was light perception and projection in both eyes. After many surgeries, including eyelid reconstruction, eyelashes electrolysis, and amniotic membrane transplants, he presented a corneal thinning in his right eye that was managed with an autologous oral mucosa graft. Considering the limited function of the eyelids, mild symblepharon, and dry ocular surface, we proposed the implantation of a BKPro II. The patient voiced his desire of avoiding complete tarsorrhaphy for better cosmesis. Osteo-odonto-keratoprosthesis or tibial bone keratoprothesis was also discarded at the patient's express wish. A year and a half later, the oral mucosa was transplanted, and once the ocular surface was stabilized, we lift the mucosa 270 degrees and performed the implantation of the BKPro II covering this device with the mucosa trephined avoiding the complete tarsorrhaphy and theraby modifying the standard procedure.
RESULTS: After 34 months of follow-up, the patient did not develop any complications, his visual acuity is stable (0.3 decimal), and funduscopic examination showed a pale optic disk, vascular tortuosity, and an epiretinal membrane that remains stable up to this period.
CONCLUSIONS: Transmucosal BKPro II may be considered as an alternative surgical technique for implant support in BKPro II carriers who want to improve their cosmesis avoiding, avoid complete tarsorrhaphy, and do not want to be exposed to dental or bone surgeries.
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