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Dr. Ignacio Yañez Polo
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DISFUNCION CRANEOMANDIFULAR // CRANIOMANDIBULAR DYSFUNCTION
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fjrigjwwe9r0TABLA1:B35 edf40wrjww2TABLA1:B35 The Temporo Mandibular Joint (TMJ) is the medical name given to the jaw joint. It is made up of the lower jaw which articulates against a disc in the cup shaped depression of the skull by the ear. If the lower jaw is displaced it can cause the disc to come away from its correct position and dislocate, causing a clicking and grating noise when the mouth opens.
When the TMJ dislocates it can cause symptoms of headaches, migraines, neckache, tinnitus, fatigue and pain to name but a few. Patients will often grind their teeth at night, have difficulty opening wide, click or grate in the TMJ when opening and have some pain in the joint area itself in front of the ear.
The diagnosis is crucial in understanding and treating the problem. The full examination will involve, muscle testing, ranges of motion, analysis, X-rays and possibly Magnetic Resonance Imaging (MRI).
Treatment can involve wearing splints and braces on the teeth to realign the jaw into its correct position. In the majority of cases this eliminates all of the symptoms, especially the headaches and migraines.
Some of the numerous and varied symptoms which can occur are listed below:
* Headaches / Migraines
* Jaw joint clicking or grating
* Jaw clenching and Bruxism (teeth grinding)
* Sleep Apnoea
* Atypical Facial Pain & neuralgias
* Facial muscle aches and tics
* Neck and Shoulder Pain
* Ear pain, tinnitus, hearing loss
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TMJ Dysfunction is a popular term to describe a disorder of the jaw joints or the muscles that control the joints. Various terms are used to describe this disorder. In this article we will use the dental term, "Craniomandibular Dysfunction." Symptoms masquerade as a multitude of other problems such as sinus headaches, migraines, neck and shoulder stiffness and earaches. Such symptoms may relate to your bite and how they can successfully be treated by a dentist who has special education in managing these disorders.
Craniomandibular Dysfunction is a dental term, which describes a collection of symptoms, which result when the chewing muscles and jaw joints do not work together correctly. "TMJ" is a popular term commonly used to describe the same group of symptoms. TMJ stands for Temporomandibuilar Joints. These are the two joints that connect your jaw to your skull. When these joints are out of place, they can cause many problems, such as:
Clicking or popping of the jaw joints
Pain in or around the jaw joints
Locking or limited opening of your mouth
Muscle spasm goes hand-in-hand with displaced jaw joints. Because the nerves and muscles are so complex in this area, when these muscles are in spasm the problems can be far-reaching. People suffer from symptoms they would never think to associate with their bite, such as:
Headaches
Pain behind the eyes
Dizziness
Earaches or ringing of the ears
Clenching or grinding of the teeth
Neck, shoulder, or back pain
Numbness, or tingling of the fingers
The primary problem can be in the joints themselves, the muscles of the face and jaw, or a combination of these. The term Craniomandibular Dysfunction (cranio = head; mandibular = jaw) is a more descriptive term because it refers to problems involving both the jaw joints themselves and the muscles of the face and head. Because the symptoms masquerade as so many other conditions, many people travel from doctor to doctor in search of a cure. It is estimated that as many as 44 million Americans suffer from one or more of these symptoms. Many never think to seek a dentist for help.
What Causes Craniomandibular Dysfunction?
The structures that make it possible to open and close your mouth include the bones, joints, and muscles. These are very specialized and must work together whenever you chew, speak, or swallow. Your teeth are inserted in your jaw bone. At the other end of your jaw bone are the temporomandibular joints. These joints attach your jaw to your skull. Muscles attach both the bones and joints and allow them to move. Any problem which prevents the complex system of muscles, bones, and joints from working together in harmony may result in Craniomandibular Dysfunction.
A "Bad Bite"
There are various ways this system can be disrupted, such as accidents involving a blow to the face or a whiplash. Yet the most common cause of Craniomandibular Dysfunction relates to your teeth and your bite. If your bite isn't right, it can affect both the muscles and the joints. What do we mean by a "bad bite"? We mean that your upper and lower teeth do not come together in a way that provides the proper bracing support for your jaw against your skull. This might result from a missing tooth, misaligned teeth, or back teeth, which are too "short."
Muscle Spasm
Your upper and lower teeth must come together firmly each time you swallow. This happens over 2000 times each day and night! When your bite is unstable your muscles must work extra hard. This extra work makes them shortened and stiff. Eventually this strain makes them feel painful. A vicious cycle begins of increased tissue damage, muscle tenderness, and pain. The pain makes you feel tense and uptight. This worsens the muscle spasm, which in turn increases the pain.
Jaw Joint Displacement
The position of your teeth can also affect the position of your jaw joints. Each jaw joint is a ball and socket joint. When functioning properly, the ball and socket do not actually touch because a thin disc of cartilage rides between them. The disc acts as a cushion and allows the joint to move smoothly. Each disc is held in place and guided by muscle. If your bite is not right, the joint is pulled out of alignment. Typically the disc is pulled forward. Since it no longer serves as a cushion, the joint itself now rubs against the boney socket and presses on pain fibers. Mild displacements cause a clicking or popping sound in the jaw joint; more severe displacements can be very painful and eventually can cause permanent damage to the joint.
An unstable bite can cause both jaw joint displacement and muscle strain and pain. Many seemingly unrelated symptoms result which are collectively known as Craniomandibular Dysfunction. When this condition is prolonged, the body begins to compensate and adapt by involving muscles in the neck, back, and even sometimes those of the arms, fingers, pelvis, legs, and feet.
Treatment
Since the teeth, jaw joints, and muscles can all be involved, treatment for this condition varies. Typically, treatment will involve several phases. The first goal is to relieve the muscle spasm and pain. Then, your dentist must correct the way the teeth fit together. Often a temporary device (known as an orthotic, or "splint") is worn over the teeth until the bite is stabilized. Permanent correction may involve selective re-shaping of the teeth, building crowns on the teeth, orthodontics, or a permanent appliance to lay over the teeth. If the jaw joint itself is damaged, it must be specifically treated. Though infrequent, surgery is sometimes required to correct a damaged joint. Ultimately, your dentist will stabilize your bite so that the teeth, muscles, and joints all work together without strain. The important aim of correcting your bite is to insure optimal long-term health. If you have any of the signs or symptoms mentioned, discuss them with your dentist. Your health is your most priceless possession. It is worth the investment!
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