Engin Medikal LTD. ŞTİ. - Göz Ürünleri

M-Sphere^® is the natural hydroxyapatite mineral matrix of bone. The bone, of New Zealand origin, treated to remove the organic components leaving only the hydroxyapatite mineral framework. M-Sphere^® is 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 eliminating dead space in the socket. Cosmetically this is highly desirable as it produces a visible bulge behind closed lids giving the impression of a normal closed eye when an artificial eye is not being worn. Furthmore, the movement of the conjunctiva covoured implant against the tarsal conjunctiva prevents the accumulation of secretions and thus maintains a healthy socket.

The left eye of a case of Juvenile Rheumatoid arthritis 18 years after enucleation and insertion of an Molteno M-Sphere^® Natural Hydroxyapatite Orbital Implant.

Preoperatively the left eye was painful and pthisical. Enucleation was followed by the insertion of 20mm
M-Sphere^®. Postoperative course was smooth and conformers were not used. Following organisation and healing a haptic contact lens incorporating the artificial eye was fitted.

This image shows how the
M-Sphere^® fills the socket and supports the eyelid when the prosthesis is not worn. Note the healthy, normal appearance of the conjunctiva.

Below, shows the appearance when wearing the prosthesis. In this case the prosthesis has been removed every night in order to rest the conjunctiva. The cleaning and sterilisation of the prosthesis has been maintained by using a standard hard contact lens maintenance regime.

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 eliminat 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.

In most patients where the tissue is healthy it is not necessary to cover the
M-Sphere^® with a cap of sclera. However if the tissues are deficient, unduly thin or scarred, donor sclera can be placed over the front of the M-Sphere^®.

The M-Sphere^® is a matrix of white, very light, natural hydroxyapatite.
The M-Sphere^® is completely porous. When buried in the patients tissues it is rapidly organised by host fibrovascular tissue.
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.
All M-Sphere^® products are pre-sterilised for added convenience and safety.
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.
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.

All MoaBone^® and M-Sphere^® orbital implants are manufactured and sterilised in strict accordance with international standards and guidelines

The correct size M-Sphere^® is usually between 3/4ths and 7/8ths of the diameter of the eye that has been removed. For example; a 24mm diameter eye has been enucleated. Normally an 18mm to 20mm M-Sphere^® would be used. However, if there are complicating factors such as poor blood supply, badly damaged tissues or other factors limiting the vitality of the tissues, a smaller M-Sphere^® would be selected.

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.

The reconstruction pack consists of a selection of 8 MoaBone^® segments (quarter spheres). These are designed to correct cosmetic defects due to post traumatic atrophy of the orbital fat. When packed posteriorly, between the periosteum and the adjacent bone of the lateral and inferior portions of the orbit, they reduce the volume of the bony orbit and displace the remaining orbital fat forward. This corrects the sunken appearance and fills the hollow beneath the brow.