Crown
What are the most commonly used materials for fabricating crowns and on which tooth position would you use them?
porcelain, ceramic, zirconia, resin, gold, metal alloys
porcelain/all ceramic: front teeth
gold alloy/zirconia: back molar
Name the components of a bridgework
abutment teeth, crowns, pontic
What are the 3 main types of dentures?
full: replace an entire arch of missing teeth
partial:If you’re missing several or most of your teeth in one or both jaws, partial dentures may be an option. Partial dentures are similar to full dentures, as they also rely on your gums and underlying bone for support. But partial dentures also have special clasps that hook around your remaining natural teeth, providing additional stability
implant-supported dentures: recommended for people who don’t want removable oral appliances. The downside of a nonremovable denture is that it requires more thorough daily cleaning, including flossing underneath your denture.
Name 3 main types of crowns and their funtion
jacket crown: makes weak tooth stronger and gives it the shape and contour of a natural tooth.
post crowns:used on a tooth with root filling, help prevent the abutment, on which a crown is cemented, from fracturing
veneer crown: covers the entire crown on back teeth
Name the different types of bridges and their functions; advantages and disadvantages
fixed-fixed bridges: supported by crowns placed over healthy teeth on either side of the gap in the mouth to keep the bridge in place. Advantage: can last for decades, durable
cantilever bridge: similar to a traditional fixed bridge, except that it’s only anchored by one tooth instead of two; it can more easily become loose compared to a traditional fixed bridge. A cantilever bridge works the best on smaller front teeth that experience less bite pressure.
adhesive bridges/Maryland bridge: a single artificial tooth that has wings or extensions on each side that the dentist can attach to the adjacent teeth to keep it in place. Because the bond isn’t as strong as other types of bridges, a bonded bridge is usually only used on a front tooth that is less likely to experience a strong bite force.
How to take care of dentures?
Explain how a crownwork procedure is performed
Crowning a tooth will usually take two to three visits. At the first visit, your tooth is prepared to receive its new crown. First, it is shaped to fit inside the new covering. This will involve some drilling to give the tooth a uniform shape. The tooth and the surrounding area will be numbed beforehand.
After the tooth is prepared, impressions of your teeth are taken, either digitally or with reliable impression materials, and sent to the dental laboratory. There, the impressions will be used to make models of your teeth for the creation of a crown. A temporary crown will be attached to the tooth to protect it until the permanent crown is ready. At the second visit, the permanent crown will be attached to the tooth with either a resin or a type of permanent cement.
Explain the procedure of a bridgework
Getting dental bridges installed typically involves multiple visits to the dentist. The procedure starts with your dentist injecting a local anesthetic into the gum tissue next to the anchors. Next, the anchor/abutment teeth are shaped and prepared for their crowns. That ensures the crowns fit properly, which in turn makes the bond with the bridge more secure.
Once the anchor teeth have been prepared, your oral professional will take an impression of your mouth and send the details to a lab where a customized bridge will be made for you. Your dentist will provide you with a temporary bridge to cover up the gap in the meantime.
You'll return to your dentist's office in a few weeks when your permanent bridge is ready. It will then be carefully installed by your dentist, making sure your bite alignment remains the same.
What are some benefits and risks of dentures?
Benefits:
Risks:
appliances shift, wobble or slip out of place when speaking or chewing. In addition, the jawbone gradually shrinks following tooth loss, leading to facial collapse
Bridges vs. implants: advantages
More Economic
Dental bridges cost less than dental implants. Unlike implants, bridges don’t require a lot of precision and can be placed without invading much of the mouth.
Bone Grafting is Not Needed
Bone grafting is done to restore the jaw bone so that dental implants can be fixed in it. When tooth loss occurs, jaw bone gradually becomes weak and is reabsorbed by the jaw. Bone grafting results in the regrowth of lost jaw bone. Bone grafting is a requirement for dental implants but not needed for fixing bridges.
Bridges are Less Time Consuming
Placing bridges does not take as much time as placing dental implants. The reason being that bone grafting is not needed for dental bridges. Placement of dental bridges requires 2-3 dental sessions at most.
Low Maintenance
Compared to dental dentures, bridges are quite low maintenance. You don’t have to remove them to clean them every now and then. Normal brushing and flossing are enough to keep them clean and hygienic. Along with that, they fit in easily and the patient gets accustomed to them pretty soon. They are comfortable to wear.
What determines the type of denture a patient needs?
Bridges vs. implants: advantages
Loss of Healthy Tooth Enamel
In the case of traditional bridges, crowns are placed over healthy teeth. To make the teeth a perfect fit for the crowns, teeth have to be shaved and sculpted. As a result, some healthy tooth material is lost. Healthy teeth may be damaged in the process.
Bone Loss Continues to Occur
Since bridges are not connected to the jaw bone, no bone grafting procedure is performed. The jaw bone which has already weakened continues to dissolve. In the case of implants, the deterioration of jaw bone is prevented because bone grafting surgery is performed. Hence, the jaw bone is saved. Bridges are placed over the gum line. Unlike implants, they don’t have any roots and cannot be anchored into the jaw bone.
Not As Lasting as Implants
Once fixed, implants can last for a lifetime. This is not the case with bridges. Their life spans over 5 to 15 years. After that, they start to become lose and have to be replaced eventually.