Chewing system and attributes must

Chewing system and attributes must match SCHOOL



ThS.BS. Nguyen Huu Nhan



Goal

- Since the components of the chewing system.

- Distinguish the concept of joint and occlusal bite.

- Understand the clinical significance of chewing system dysfunction.



1- Chewing system concepts:



Chewing system as a whole, a functional unit consists of multiple components:

- Tooth and gum.

- The jawbone.

- The mandibular joint.

- The salivary glands.

- Environmental Systems tongue cheek.

- The jaw muscles.

- Vascular system, nerves nourish and maintain the dominant function of the upper body.

Each individual tooth has important clinical implications, but itself can not accomplish chewing function. Only when the teeth are in proper relation to each other about the anatomy and physiology to create a new set of teeth they become a fundamental component of the chewing system means they need to be studied in relation to the function of it.

In addition to chewing, swallowing, chewing system also undertaken many other important functions such as language function, aesthetic and functional communication functions.





2- CONCEPT K two bite.



Occlusion or the fit between the teeth is exposed dental status in any position of the lower jaw than the upper jaw.

Some special occlusal position is the position reference and can restore is:

2.1 Posture maximum cage or bite zone center.

This position created many points of contact between the biting surfaces of the teeth above and below the teeth, leading to the highest mechanical stability in the relationship between the two functions.

This position is not constant but changes with time t funny because it depends on the condition of the teeth and the teeth change in supply.

2.2 Posture same interest.

Is the position of the mandible when the convex bridge located at the highest and most later in the hollow joints, whereas the body is completely relaxed and jaw after being pushed out the most.

This is a skull correlation function so that it does not depend on teeth and dental supply.

2.3 Correlation between the teeth when the lower jaw posture cage maximum zone.

- Incisor edges bite to bite food.

- 1 zone sharp canine teeth for tearing food.

- Small molar teeth generally have two to put food zone.

- Molars have 3 to 5 grind zone to chew food.

- Inclined surface forming the tooth is convex zone makes the fit between the teeth are exposed between points rather than the present.

- There are two types of zones:

- The lower zone and the zone of the teeth of the tooth, called the bear zone.

- The zone of the lower teeth and the teeth on the outer zone is called the zone guide.

- The zone shall be geared to the tooth opposite the cage posture zone. And the tutorial zone mismatch on the tooth opposite the cage posture zone.

- Also in the front teeth in normal conditions, the government has teeth on both government along the horizontal bottom teeth.

- Looking at the entire supply larger teeth on the lower teeth and coating offers provide lower teeth.

- This form helps the teeth when chewing function t be performed not bite his tongue to lips and cheeks.

- Normally an exposed tooth less than 2 teeth on the lower jaw and teeth of one of the 8 maxillary teeth.

- This zone type cage alternating effects stabilize the lower jaw to the skull tropical teeth meet when the same posture cage l Australian citrus lower jaw is stabilized and most certainly mechanically and can only transfer to another position (sliding or free movement) if there is simply a function of the lift.



3- Biting notion of joint.



Study subjects matched the bite is on the relationship between the components of the chewing system, expressed primarily on three main components: Tooth-Nhachu Thankinh + + Co-mandibular joint.

The relationship which (including the functional relationships, access functions and dysfunction) can interact with the contact between the biting surfaces of the teeth of the physical condition and a certain spirit.

Bite is a bite matching function to facilitate matching functions, ie to contribute to the stability bite, not impede sliding movement of the lower jaw and the lower jaw to help achieve maximum position easily integrated zone .



Advocacy approach is the active function of the chewing system, exposure (direct or indirect) between the teeth of the two functions, but not for the purpose of the function.

These athletes access functions (teeth grinding, biting / clenching teeth and bite / sliding swinging teeth) are common but not necessarily abnormal or pathological. However, depending on the severity and duration of them can contribute to disease.

Gnashing of teeth makes tooth enamel is worn, exposing the dentin causing sensitivity, fracture zones teeth, loose teeth and loss; damaging the inlays or dental restorations. Consequently, the reduced size vertical as in older patients.

The strongest muscle contractions are so prone to sickness, headaches and neck pain; hypertrophy may cause imbalance.

Severe cases will lead to dysfunction chewing system.



4- System dysfunction chewing mandibular or DISORDERS.



Temporal disorder - functions as a general term to refer to disorders related to the chewing muscles, to the temporomandibular joint-function or both.

4.1 Symptoms

Main symptoms are pain and dysfunction.

4.1.1- Pain

- Pain in the temporomandibular joint - function:

Pain in the ear before (synovial), usually in 1 to 2 internal parties.

Pain increases when the lower jaw movement.

- Pain in the body:

There are many levels of feeling discomfort, muscle tension, muscle until the pain actually.

Pain usually 1 side 2 sides rarely hurts both.

Pain can be spontaneous or related to function (chewing) or greater pain when opened.

Sometimes it hurts more in the morning after waking up, together with limited mouth, especially in humans or teeth grinding at night.

4.1.2- dysfunction

As the movement disorders of the temporomandibular joint functions-functions or function of the body is reflected in the signs:

- Cry of temporomandibular joint-function.

English magnifying sweep.

Scratchy voice.

- Limit motor function:

Find it difficult to perform normal motor function below.

May be due to the loss of normal joint or muscle pain due.

-Lech Jaw when mouth:

Zig-zag mouth

Mouth skewed to one side.

4.2 Cause:

- Injury.

- Of chronic injury.

- Structural defects.

- The joint disease such as rheumatoid arthritis.