Dental implants are a popular method of replacing one or more missing teeth. They are metal devices surgically placed into the jawbone and allowed to bond with the surrounding bone tissue over a period of over how many months? Input the correct answer in numeric form into the space provided.

Which device or implant is not used for internal fracture implantation?a) Ceramicsb) Screwsc) Platesd) Plastics

When a tooth begins to decay, a dentist will place a filling into the cavity to restore the tooth back to its normal shape. An engineer is designing a new filling. He has tested four different materials for the filling design and recorded his observations in the table below.Material How longdoes it last? Cost Advantage Disadvantagegold 10–15 years average does not chip easily • can cause pain if near a silver filling• can only be used in large cavitiessilver 10–15 years least expensive does not chip easily can cause allergic reactionscomposite 5 years most expensive • chemically bonds to the tooth• can be used in small or large cavities can chip easilyporcelain 15–30 years average chemically bonds to the tooth can cause tooth pain whenconsuming hot and cold itemsWhich material should the engineer choose if he wants the filling design to be durable and attach to the natural tooth? A. composite B. porcelain C. gold D. silver

When a tooth begins to decay, a dentist will place a filling into the cavity to restore the tooth back to its normal shape. An engineer is designing a new filling. He has tested four different materials for the filling design and recorded his observations in the table below.Material How longdoes it last? Cost Advantage Disadvantagegold 10–15 years average does not chip easily • can cause pain if near a silver filling• can only be used in large cavitiessilver 10–15 years least expensive does not chip easily can cause allergic reactionscomposite 5 years most expensive • chemically bonds to the tooth• can be used in small or large cavities can chip easilyporcelain 15–30 years average chemically bonds to the tooth can cause tooth pain whenconsuming hot and cold itemsWhich material should the engineer choose if he wants the filling design to be durable and attach to the natural tooth? A. silver B. gold C. composite D. porcelain

Select the statement that is TRUE concerning primary teeth. There are 20 primary teeth, and by 24 months of age, most children have all 20. There are 27 primary teeth, and the molars are permanent. There are 32 primary teeth, and by 36 months of age, most children have all 32. There are 24 primary teeth, and no new primary teeth appear after 13 months.

Fill in the blank. _______ are thin layers of acrylic, composite, or porcelain placed on the outer surface of the teeth to improve their appearance or shape. Type the correct answer into the space provided.