A novel approach to re-pegging hydroxyapatite implants using bioactive glass

Area of Science:

• Ophthalmology
• Biomaterials Science

Background:

• Hydroxyapatite orbital implants are used to replace lost orbital volume.
• Pegged implants can develop complications requiring revision surgery.
• Bioactive glass is a synthetic material with bone-bonding capabilities.

Observation:

• Three patients with complications from pegged hydroxyapatite orbital implants were treated.
• Existing implant pegs and sleeves were removed, and peg tracts were filled with bioactive glass.
• Follow-up occurred over a 3-year period.

Findings:

• No complications were observed during the follow-up period.
• Two out of three patients successfully underwent re-drilling and insertion of new titanium pegs after two months.
• Both patients who were re-pegged reported satisfaction with the outcome.

Implications:

• Bioactive glass serves as an effective material for regenerating bone in old peg tracts.
• This technique facilitates the re-pegging of hydroxyapatite orbital implants, improving patient outcomes.
• The use of bioactive glass presents a promising alternative for managing complications associated with orbital implants.