implant

Question 1

What are the two main materials used for dental implants?

Answer 1

Titanium and Zirconium for metal; Zirconia for ceramic

These materials are chosen for their biocompatibility and strength.

Question 2

List the options available for dental implants.

Answer 2

• Single tooth
• Implant supported bridge
• Implant supported denture

These options provide different solutions based on patient needs and tooth loss.

Question 3

What is osseointegration?

Answer 3

The process by which a dental implant becomes integrated with the bone

This process is crucial for the stability and longevity of the implant.

Question 4

What are the physiological chewing forces experienced by dentate individuals?

Answer 4

70-150N between molars

This range indicates the natural forces exerted during normal chewing.

Question 5

What are the maximum clenching forces measured between molars?

Answer 5

500 - 700N

These forces represent the maximum pressure that can be applied during clenching.

Question 6

What type of movement is experienced by a tooth under load in the horizontal vs vertical plane?

Answer 6

• Greater movement in horizontal plane (~100μm)
• Lesser movement in vertical plane (~10μm)

This difference in movement highlights the mechanical behavior of teeth under stress.

Question 7

What components provide support for a tooth?

Answer 7

• Bone
• PDL fibres
• PDL fluids

These components work together to allow for slight movement and flexibility.

Question 8

How do teeth and implants differ in terms of support?

Answer 8

• Teeth have PDL + bone, providing viscoelastic support
• Implants have pure elastic support from bone, with no PDL

This fundamental difference affects how they respond to forces.

Question 9

What is the role of PDL mechanoreceptors?

Answer 9

They respond to PDL tension and are sensitive to small forces <0.1N

These receptors are crucial for the sensation of touch and proprioception.

Question 10

What happens to pulpal and PDL nerves after tooth extraction?

Answer 10

• Could reinnervate new tissues
• Could degenerate
• Could form a neuroma

The fate of these nerves is important for understanding post-extraction healing.

Question 11

True or False: Implants have periodontal ligament mechanoreceptors.

Answer 11

False

This absence affects the feedback mechanisms during biting and chewing.

Question 12

What is osseoperception?

Answer 12

The sensation perceived from receptors in the surrounding bone of an implant

It allows for some degree of sensory feedback despite the lack of PDL.

Question 13

How do dental implants behave under loading compared to natural teeth?

Answer 13

• Exhibit less movement on loading
• Behave elastically under load
• Lack fine feedback on biting forces

These differences can impact patient experience and functionality.

Question 14

What are the implications of lacking PDL mechanoreceptors in dental implants?

Answer 14

• Lack of fine feedback on biting forces
• Lack of masticatory feedback and reflex control
• Altered sensation of biting on implant-supported tooth

These factors can influence a patient’s adaptation to implants.