The M-Sphere® orbital implant is manufactured from MoaBone®, the natural hydroxyapatite mineral matrix of cancellous bone. The bone, of New Zealand origin, is treated to remove the organic components leaving only the hydroxyapatite mineral framework.
M-Sphere® orbital implants are designed to support and impart movement to an artificial eye (prosthesis) after enucleation. Like the mineral portion of human bone, the bony trabeculae within the M-Sphere® provide a completely porous structure which is easily and rapidly incorporated into the tissues. With careful surgical technique it is possible to insert a relatively large M-Sphere® into Tenon’s space and eliminate dead space in the socket. Cosmetically this is highly desirable as it produces a visible bulge behind closed lids giving an impression of a normal closed eye when a artificial eye is not being worn. Furthermore, the movement of the conjunctiva covered orbital implant against the tarsal conjunctiva prevents the accumulation of secretions and maintains a healthy socket. Where customised artificial eyes are not available, a smaller M-Sphere® orbital implant can be used with a stock artificial eye.
Advantages of the M-Sphere® orbital implant:
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The M-Sphere® is a matrix of white, very light, natural hydroxyapatite.
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The M-Sphere® is completely porous. When buried in the patients tissues it is rapidly organised by host fibrovascular tissue.
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The M-Sphere® can be easily shaped to suit the individual case. this is done by soaking in antibiotic or saline solution which allows it to be shaped with a pair of scissors.
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All M-Sphere® products are pre-sterilised for added convenience and safety.
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Once incorporated into the patients tissue the M-Sphere® resists migration and extrusion. It provides a robust, permanent and mobile support for an artifical eye.
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When fitted with an artificial eye the M-Sphere® gives an excellent cosmetic appearance without the need for drilling and pegging. However, it may be drilled and pegged in the standard manner if required.
Independent quantitative analysis indicates the M-Sphere® is lighter and more porous than comparative devices derived from bone substitutes.
|
M-Sphere |
Coralline HA |
Synthetic HA |
Weight |
0.31gm |
0.79gm |
0.62gm |
Void Space |
90% |
65% |
50% |
Crystal Structure |
Solid sheet
of tissue |
Sea Urchin
shaped |
Cobblestone
like |
All MoaBone® and M-Sphere® orbital implants are manufactured and sterilised in strict accordance with international standards and guidelines
Available in the following sizes.
Because the M-Sphere® come in a range of sizes, this allows the correct size M-Sphere® to be selected to suit the individual case.
In addition, M-Sphere® orbital packing segments are available for cosmetic reconstructive surgery.
| MS 16 |
M-Sphere 16mm |
| MS 18 |
M-Sphere 18mm |
| MS 20 |
M-Sphere 20mm |
| MS 22 |
M-Sphere 22mm |
| MS08 |
Reconstruction pack (8 assorted segments) |
|
