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Necessity, types, material properties and selection criteria of orbital implants after eye removal surgery: Medpor and Hydroxyapatite
eye_doc 2025. 4. 21. 17:33๐ Orbital Implants After Eye Removal – Why They Matter & What to Choose
After eye removal surgery (enucleation or evisceration),
placing an orbital implant is essential to restore cosmetic appearance and ensure functional socket volume.
This post compares the two most commonly used implants: Medpor and Hydroxyapatite.
โ Why Use an Orbital Implant?
- Maintain volume after eye removal
- Provide space for prosthetic eye (ocular prosthesis)
- Support natural appearance and eye movement
โ Size & Volume Consideration
- Normal adult eyeball ≈ 7.2 cc
- Typical ocular prosthesis ≈ 2.5 cc
- Required orbital implant volume ≈ 4.7 cc
→ 20mm sphere typically appropriate for adults
โ Medpor vs Hydroxyapatite
FeatureMedporHydroxyapatite
| Material | Porous polyethylene | Porous artificial bone |
| Durability | High | Brittle, needs wrapping |
| Tissue integration | Excellent | Good with cover |
| Price | ~1 million KRW | Slightly less |
| Custom types | SST (with grooves for muscles) | No special type |
โ Porous Structure Advantage
- Promotes vascular ingrowth
- Reduces infection risk
- Stable long-term fixation inside the orbit
โ Post-Surgery Function & Appearance
- Prosthetic eye fits securely in socket
- Mimics natural eye movement if muscles attached
- Enhanced confidence and quality of life