Dentures are often referred to as "false teeth". Just as "false legs" and "artificial limbs" are called "prosthetic limbs", "denture" means teeth that do "duty" for human beings. Denture" means the teeth that do the "duty" for human beings. In medicine, it is a general term for the restorations made after the partial or total loss of upper and lower jaw teeth. There are two types of dentures: removable and fixed. Fixed dentures (commonly known as "fixed dentures") cannot be removed by the patient, while removable dentures (commonly known as "removable dentures") can be easily removed by the patient.
Materials
(1) Plastic teeth. With the denture base for chemical connection, most of the finished teeth, can also be customized. Plastic teeth are not easy to fall off, strong toughness is not easy to break the characteristics, can be arbitrary grinding to adapt to the patient's different missing teeth gap. But the hardness is poor, easy to wear, chewing effect is also poor. At present, the clinical has been widely used hard plastic teeth, its wear resistance is better than the general plastic teeth.
(2) porcelain teeth. With the help of nails or holes in the tooth surface connected to the abutment, are finished. Porcelain teeth hardness, dense texture, not easy to wear and tear, chewing efficiency, good luster, not easy to contaminate discoloration. However, it is brittle, easy to fracture, can not be arbitrary or too much grinding change, so it is suitable for gap large and multiple back teeth missing in succession, gingival distance (teeth occlusal surface to the distance between the gums) is large, the missing teeth area alveolar ridge is plentiful, to the teeth of the periodontal health.
(3) Metal (lingual) faceted teeth. Is the face of the artificial teeth and front teeth of the lingual part of the back teeth, made of different metal casting or hammered, the use of metal retaining device connected to the plastic teeth. Because of the hardness of the metal can withstand large biting force, not easy to break and wear, but difficult to wear change. Metal surface teeth are suitable for the elongation of the teeth or due to the neighboring teeth to the missing teeth area tilt, displacement caused by the missing teeth gap is too small, the gingival distance is too low. In addition, various means are used to improve the performance of dentures in the clinic, such as burying metal pieces inside plastic teeth to increase the wear resistance of dentures. There are also cast metal mesh reinforcements buried in plastic teeth to prevent bite cracks.
(4) metal teeth. In order to prevent the longitudinal folding of artificial teeth, for too small gap or too low gingival distance of the missing teeth, can be used to cast metal teeth or metal teeth and brackets and rings to do the whole casting, to achieve the purpose of beauty and durability.
Advantages ?
1, fixed denture ? Comfortable, high chewing efficiency ?
2, beautiful, durable, general life in decades ?
3, does not hinder the tongue movement, does not affect the identification of food flavor
4, movable denture ? Self-cleaning ability, conducive to the cleaning of the remaining teeth ?
5, the clinical operation is simple, the patient in the operation without discomfort ?
6, low cost, even if the full mouth plastic denture does not exceed one thousand dollars ?
Disadvantages
1, the need for excessive grinding of the teeth
2, the cost is higher, the general type of movable denture several times
3, poor self-cleaning ability (can not be removed, easy to audit the food
4, such as the missing teeth, you can see the metal rings are not beautiful
5, foreign feeling is very strong. 5, a strong sense of foreign body, many people can not tolerate
6, need to be removed daily, the process is cumbersome, is not conducive to social activities activities denture is generally not calculated by the number of pieces
Dental implantsDental implants are a kind of implanted in the bone tissue of the lower structure as the basis for supporting, fixing the upper part of the dental prosthesis of the missing teeth restorative method. It consists of two parts: the lower supporting implant and the upper dental restoration. It uses artificial materials (e.g. metal, ceramics, etc.) to make implants (generally similar to the shape of tooth roots), which are surgically implanted into the tissues (usually upper and lower jaws) and receive solid retention support from the bone tissues, and then connected to support the upper restorations through special devices and methods. Dental implants have become the preferred restoration method for more and more patients with missing teeth, as they can achieve restorative effects that are very similar to the function, structure and aesthetic effects of natural teeth.
Materials
The material of dental implants is divided into two parts: the root material and the crown material, which can be handled flexibly according to the patient's wishes, while the root material is strictly regulated. In the long history of human stomatology exploration, dental implant root with a lot of materials have appeared one after another, such as gold, gemstones, lead, iron, iridium, platinum, silver and so on, but also porcelain, rubber, ivory and so on. With the development of modern industry, there are many metal materials with high strength and good corrosion resistance, such as cobalt-chromium alloy, titanium, tantalum and so on.
Advantages
1, its chewing function is greatly superior to many traditional dentures.
2. It has strong retention and stability, and it is rooted in the patient's mouth like real teeth.
3. There is no damage to the natural teeth on both sides.
4, do not need movable dentures necessary abutments and rings, no large plastic abutments caused by the dullness of taste and discomfort;
5, small size, does not show the metal, beautiful, and conducive to maintaining oral cleanliness.
Disadvantages
1, the course of treatment is longer than the traditional oral restoration, usually 3 months.
2, the cost is higher, each in about 1w.
3, high requirements for the patient's bone quality.