MRI Findings of Fibrovascularization in Hydroxyapatite Orbital Implants.

Ahn, Byoung Sun; Woo, Kyung In; Kim, Yoon Duck

Original Article

Journal of the Korean Ophthalmological Society 1999;40(1):1-9.
Published online January 1, 1999.

MRI Findings of Fibrovascularization in Hydroxyapatite Orbital Implants.

Byoung Sun Ahn, Kyung In Woo, Yoon Duck Kim

Department of Ophthamology, College of Medicine, Sungkyunkwan University, Samsung Medical Center.

Hydroxyapatite 안와 삽입물에서 섬유혈관화의 자기공명영상 소견

안병선(Byung Sun Ahn),우경인(Kyung In Woo),김윤덕(Yoon Duck Kim)

Abstract

To evaluate the degree of fibrovascular ingrowth in hydroxyapatite orbital implant, we performed gadolinium-enhanced T1 weighted magnetic resonance imaging in 10 eyes elapsed 6 months after hydrovyapatite implantation and on 6 eyes at 1, 2, 3, 4, and 6 months after hydroxyapatite implantation, and calcualted the volume of enhanced area. In 10 eyes elapsed 6months after hydroxyapatite implantation, all showed enhancement over 90%(average, 93.6%). In 6 eyes examined at 1, 2, 3, 4, and 6 months after hydroxyapatite implantation, the average percentage of enhanced area was 73.2% at 1 month, 76.0% at 2 months, 80.0% at 3 months, 89.8% at 4 months, and 92.0% at 6 months. the enhanced volume was over 90% at 4 months after the implantation in almost all cases. In hydroxyapatite orbital implantation done by our modified procedures, we suggest that the drilling for peg placement is possible 4 months after the implantation.

Key Words: Fibrovascular ingrowth;Hydroxyapatite;Magnetic resonance imaging;Volume