Wednesday, October 7, 2009

Blind British boy sees with his ears

     A seven year old boy, who was born blind, can now see with his ears using a technique similar to that used by bats and dolphins.
     Lucas Murray, nicknamed bat boy, can see by clicking his tongue on the roof of his mouth. He can find out where and how far big objects are by listening to the echo that bounces back. This technique is similar to echolocation used by bats and dolphins, which measure height and distance of an object by the echo of the sound emitted by those objects.
     Lucas loves playing basketball and even goes rock climbing. “I love basket ball and it is much easier to play now that I can use my click to find out where the hoop is. It was quite hard to learn what the echoes meant at first, but now I find it a lot easier.” Lucas was told.
     The technique was pioneered 41 year old Daniel Kish of California, who himself is blind. He spent three days working with Lucas and his family two years ago. “While Daniel taught Lucas echolocation and cane skills, he taught us that the most important lesson as parents is to let him do it himself. Lucas picked up the clicking quite quickly and very soon we could tell it was having a real impact on his life.” Sarah Murray was told.
     “When people see him walking or running around and hear that he is blind, they are just blown away,” his mother said.
     What more, Lucas can even estimate the size of an object by the intensity of the echo. According to him, a smaller object would reflect only less of the sound wave.

Tuesday, October 6, 2009

Solution for Tooth Loss

A dental implant is an artificial tooth root placed in to your jaw to hold a replacement crown or bridge in place. The treatment can be more conservative than traditional bridge work, since implants do not rely on neighboring teeth for support. Dental implants restorations are so natural looking and feeling that you may forget you ever lost a tooth. Dental implants can be the best solution to the problem of missing teeth. Since dental implants integrate into the structure of your bone, they can prevent the bone loss and gum recession. No one will ever know that you have a replacement tooth.

How will the implants be placed?
First, implants, which look like screws or cylinders, are placed into your jaw. Over the next two to three months, the implants and the bone are allowed to bond together to form anchors. During this, time, a temporary teeth replacement option can be worn over the implant sites. Often, a second step of the procedure is necessary to uncover the implants and attach extensions. The se small metal posts, called abutments, complete the foundation on which your new teeth will be placed. Your gums will be allowed to heal for a couple of weeks following this procedure.
There are some implant systems (one stage) that do not require this second step. These systems use an implant which already has the extension piece attached. Your periodontist will advise you on which system is best for you. Finally, replacement teeth, or bridges, will be created for you by your dentist and attached to the abutments. After a short time, you will experience restored confidence in your smile and your ability to chew and speak.

Am I a candidate for dental implants?
The ideal candidate for a dental implant is in good general and oral health. Adequate bone in you jaw is needed to support the implant. The best candidates have healthy gum tissues that are free of periodontal disease. Smoking is detrimental to healing but is not an absolute contraindication. Dental implants are intimately connected with the gum tissues and underlying bone in the mouth. Your dentist can determine if you are a good candidate for this procedure. Implants can also be used for those who have lost all their teeth.