Long-term functional and anatomical results of osteo- and osteoodonto-keratoprosthesis
- 158 Downloads
To analyse the functional and anatomical results of keratoprosthesis using tooth and tibial autograft.
We reviewed 227 charts of patients that underwent osteo-keratoprosthesis (OKP) (n = 82) or osteo-odonto-keratoprosthesis (OOKP) (n = 145) at the Centro de Oftalmología Barraquer. Mean follow-up time was 8.4 years for OOKP and 3.5 years for OKP. Kaplan-Meier survival curves with 95% confidence interval (CI) were calculated for functional success, defined as BCVA >0.05. Anatomical success was defined as retention of the keratoprosthesis lamina. Visual Acuity by Time (VAT) Index with 95% CI was calculated for up to 2 years post-OKP and up to 6 years post-OOKP. Maximum visual acuity ever reached after the last step of the implantation of the keratoprosthesis was used as an indicator for the potential of the retina.
Based on Kaplan-Meier analyses, 10-year anatomical survival was 66% (CI 57–76) for OOKP and 47% (CI 27–67) for OKP. Two-year functional survival was 63% (CI 55–71) for OOKP and 49% (CI 37–60) for OKP, and 10-year functional survival was 38% (CI 29–48) for OOKP and 17% (CI 5–28) for OKP. Multivariate analysis showed that neither surgical technique (OOKP or OKP), primary diagnosis nor age had a significant influence on the functional survival. However, a high maximum visual acuity ever reached post-op decreased the risk for functional failure. According to the VAT Index calculations, mean BCVA 2 years after OOKP was 0.33 (CI 0.28–0.41) and after OKP was 0.28 (CI 0.20–0.36).
Although we found a tendency that OOKP had better anatomical results than OKP, this difference was not statistically significant up to 10 years post-op. Functional results for both techniques were not significantly different at the 2-year follow-up, but at 10 years they were. However, this difference was influenced by the retinal potential and not by the technique itself.
KeywordsKeratoprosthesis Long-term results Tooth Tibial bone Visual acuity
- 1.Alvarez de Toledo J, Barraquer RI, Temprano J, Carreras H, Torres E, Barraquer J (1999) Osteo-odonto-keratoprosthesis. A 30 years retrospective study. An Inst Barraquer 28:95–100Google Scholar
- 2.Caselli M, Colliardo P, Falcinelli G, Nebbioso M (1999) Falcinelli’s osteo-odonto-keratoprosthesis: long-term results. An Inst Barraquer 28:113–114Google Scholar
- 7.Liu C, Pagliarini S (1999) Independent survey of long term results of the Falcinelli osteo-odonto-keratoprosthesis (OOKP). An Inst Barraquer 28:91–93Google Scholar
- 8.Strampelli B (1963) Keratoprosthesis with osteodontal tissue. Am J Ophthalmol 89:1023–1039Google Scholar
- 9.Temprano J (1993) Keratoprosthesis with tibial autograft. KPro Abstracts: Proceedings of the first keratoprosthesis study group meeting. Refract Corneal Surg 9:192–193Google Scholar
- 10.Temprano J (1998) Late results of osteo-odonto-keratoprosthesis and tibial keratoprosthesis. An Inst Barraquer 27:53–65Google Scholar