Prosthetics

Question 1

Types of Ocular Prosthesis:

Answer 1

Prosthetic Contact Lens

Prosthetic eye - artificial Eye

Scleral shell - shell prothesis

Orbital implant - orbital prosthesis

Conformer

Question 2

An artificial device used to replace missing facial or oral structures.

Answer 2

Maxillo-facial Prosthesis

Question 3

Prosthesis which can be worn over a damage eye, or unremoved eyeball

Answer 3

Scleral shell - shell prothesis

Question 4

hides or mask corneal opacity or abnormalities

(after an iridectomy or in a case of iris coloboma)

Answer 4

Prosthetic Contact lens

Question 5

when an eye is removed, it is used to replace the volume in the orbit that was occupied by the eye

prevent a sunken appearance of the orbit

Answer 5

Orbital Implant

Question 6

Materials used in orbital implant:

Answer 6

Non-porous - do not allow in-growth of organic tissue and fibrovascular in-growth (PMMA, Glass, silicone spheres)

porous - allows fibrovascular in-growth throughout the implant (Hydroxyapatite, polyethylene)

Question 7

clear, non-water-absorbent spheres of 12 to 20mm diameter, used for implantation after evisceration or enucleation

Answer 7

Polyethylene Beren’s spheres (POROUS)

Question 8

This implant allows tissue and blood vessel invasion which stabilizes the implant and encourages consistent positioning within the orbit.

Answer 8

Bio-eye^TM hydroxyapatite ocular implant (POROUS)

Question 9

It is a clear, plastic oval-shaped concave disc placed in the socket over the implant during post of treatment

aids in healing and improves formation of fornices

form a pocket for the prosthesis, and hold the implant well back in the socket.

Answer 9

Conformer

Question 10

restores the volume and appearance of a missing eye and eyelids

Answer 10

Orbital Prosthesis

Question 11

Methods of Fitting prosthesis:

Answer 11

Custom fitting or Molding -

Stock fitting - Stock prosthetic eye/hells

variation of standard sets - WAX MODEL

Question 12

fitting that is:

• well-fitted prosthesis
• Uses impression molding
• More precise copy of the normal eye is possible

Answer 12

Custom fitting or MOLDING

Question 13

Basic Fitting goals

Answer 13

• Optimum pupil diameter
• Orthophoric appearance
• Stability of fit

Question 14

Cases of phthisis bulbi or a scarred blind eye may need a ______

Answer 14

thin prosthetic eye or COSMETIC SHELL

Question 15

is a plastic ocular prosthesis that is essentially a painted haptic lens.

typically, is fitted over an existing globe which may be shrunken, blind or disfigured.

Answer 15

Prosthetic shell