The 920th Dental Care Day 2010 is coming up, here are some veneer tips for all patients. Which patients should visit the Department of Prosthodontics? There are mainly dental defects (broken crowns, chipped corners, etc.), abnormal tooth color (fluorosis, tetracycline teeth, etc.), missing teeth, total edentulousness, oral and maxillofacial defects (including defects of the five senses such as eyes, ears, nose, etc.), etc. The task of restoration is to restore the patient’s aesthetic and chewing functions and improve the quality of life. What is a porcelain crown? What are the indications? What kind of porcelain teeth are good? Porcelain has been used since the early nineteenth century, it is a good performance material, with the advantages of hard and wear-resistant, smooth surface, good color, stable chemical properties, insoluble in saliva and good histocompatibility. Porcelain crowns are lined with metal and then formed with a porcelain layer on the outside to achieve an aesthetic effect. It is generally used for tooth defects, tooth color abnormalities, restoring the shape and color of the tooth through porcelain crowns, etc. The main difference in porcelain teeth is the different metal lining, generally there are nickel-chromium, cobalt-chromium and precious metal porcelain crowns. Nickel-chromium porcelain crowns have two main problems: some patients can have allergy symptoms; gums and porcelain crowns in contact with the edge of the easy to blacken, especially for a long time is more obvious, even if the removal of a part of the blackened gums can not be restored. Cobalt-chromium alloy is also a non-precious metal alloy, the chances of allergy and gum blackening are smaller, the only possible problem is a slightly poorer edge fit. Precious metal porcelain crowns are mainly gold-platinum alloy porcelain crowns, this material is currently recognized as a very good biocompatible porcelain crowns, allergies and gum blackening is very small, the biggest advantage is the edge fit, in addition, because the precious metal is generally yellowish, so the final color of porcelain crowns to be softer. What should I do if I have a missing tooth? There are generally three methods of dental implants after tooth loss: removable dentures, fixed bridges and implants. The movable denture can be taken off and worn by the patient, low cost, easy to clean, but the volume is large, there is a foreign body feeling when worn in the mouth, may have a blurred speech when first worn, the recovery of chewing function is limited, easy to loose when chewing, and need to be removed for cleaning after meals. The movable denture can be divided into adhesive partial denture (also known as plastic denture), ordinary metal bracket and titanium bracket according to the different materials of the abutment. The ordinary metal brackets are thinner and more comfortable compared to the former. Titanium brackets are thinner compared to regular metal brackets, but titanium brackets are lighter and have the best comfort level. The fixed bridge is glued to the remaining teeth on both sides of the missing tooth, and does not need to be removed, it is stable, comfortable, beautiful, has no effect on pronunciation, and can restore more chewing function. However, the remaining teeth on both sides of the missing teeth are more worn out, and the cost is more expensive compared to movable dentures. Implant denture is a pure titanium implant (i.e. high-tech bionic artificial root) with good histocompatibility with the human body, implanted in the missing tooth area, and then after a period of time to achieve osseointegration, a denture (dentures) is attached to the artificial root to restore the missing teeth. It belongs to the advanced technology of today’s dentistry and is known as the “third set of teeth” for human beings. Implant dentures have the advantages of good retention, stability, high chewing efficiency, aesthetic comfort, no foreign body feeling in the mouth, and no wear on healthy neighboring teeth. After tooth loss, choose the above three types of dental implants according to your situation and indications. What are porcelain veneers? What are the indications? Porcelain veneers are all-ceramic restorations that cover part of the tooth surface. That is, the use of bonding technology, in the case of preservation of the living pulp, less grinding teeth, the surface of the tooth defect, stained teeth, discolored teeth and malocclusion with porcelain restorative materials bonded to cover its surface, in order to restore the normal shape of the tooth and improve its color. It has good histocompatibility, stable chemical properties, color can be deployed to coordinate with natural teeth, good transparency, stable color and good wear resistance. It is one of the best restorations in terms of aesthetic effect. Compared with resin veneers, its biggest advantage is that the color is stable and does not age with time, and the color effect is good. Compared to porcelain crowns, its biggest advantage is that it requires less grinding of the teeth, only a part of the labial surface (that is, the outside that can be seen) needs to be grinded, and no nerve killing is required. Compared to chemical bleaching methods, it is color stable, has a large color improvement, and can also improve the shape and alignment of part of the tooth. Porcelain veneers are suitable for tooth color problems: fluorosis, tetracycline teeth, single discolored teeth, etc.; mild and moderate enamel defects; gaps in front teeth; mild misaligned teeth; trauma to front teeth, caries, etc.