Lecture I - Dr. Fleisher

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Questions and Answers

What is the primary reason for the initial dip in instability after implant placement?

Trauma to the surrounding area (correct)

Initial mechanical retention

Osteoblasts growth

Osteoclasts activity

What is the significance of the roughened surface implant in terms of stability?

It has a higher initial stability than the machine surface implant

It has a similar stability pattern to the machine surface implant

It experiences a smaller dip in stability compared to the machine surface implant (correct)

It has a lower long-term stability than the machine surface implant

What is the recommended timing for restoring an implant based on the data presented?

After 6 months of implant placement

After 1 year of implant placement

Immediately after implant placement

After 3 months of implant placement (correct)

What is the role of osteoclasts in the initial phase after implant placement?

They are responsible for bone resorption Signup and view all the answers

What is the relationship between the initial phase and the secondary phase of implant placement?

The initial phase is a period of low stability, while the secondary phase is a period of high stability Signup and view all the answers

What is typically the first indication of a potential problem with an implant?

Loosening of the screw holding the restorative component Signup and view all the answers

According to the literature, what is the primary cause of screw loosening in implants?

Malocclusion Signup and view all the answers

What type of implant is more prone to screw loosening and fracture of the implant components?

External hex implant Signup and view all the answers

What is the primary reason for implant failure, according to Goodacre's published article?

Malocclusion Signup and view all the answers

What is the common response of a dentist when a patient presents with a loose screw?

Tighten the screw and monitor the patient Signup and view all the answers

What is the primary challenge for a restorative dentist when working with traditional implants?

Guessing the location of buccal and lingual surfaces Signup and view all the answers

What is the primary advantage of internal connections in implant design?

Reduced restorative complications Signup and view all the answers

Which type of internal connection features a triangular shape?

Tri channel Signup and view all the answers

What is the primary reason for the shift towards internal connections in implant design?

Time-saving benefits and improved accuracy Signup and view all the answers

What is the common issue associated with tri channel internal connections?

Unique challenges and limitations Signup and view all the answers

What is the primary reason for performing a two-stage process in dental implant placement?

To isolate the implant and improve the grafting outcome Signup and view all the answers

What is the purpose of the cover screw in the dental implant fixture?

To cover the opening of the implant Signup and view all the answers

At which stage of the two-stage process is the implant exposed?

After the appropriate waiting time Signup and view all the answers

What is the purpose of the healing cap in the two-stage process?

To isolate the implant during the healing process Signup and view all the answers

What is the final step in the two-stage process of dental implant placement?

Placement of the crown base and implant crown Signup and view all the answers

What is the primary reason for restorative failure in dental implants?

Unfavorable forces applied to the implant Signup and view all the answers

How do patients typically become aware of a problem with their dental implant?

Through signs of overloading and forces Signup and view all the answers

What is the significance of surrounding teeth in relation to dental implants?

They have sensation that can detect problems with the implant Signup and view all the answers

Why do dental implants not have a protective function to prevent overloading and forces?

Because they do not have sensation or nerve supply Signup and view all the answers

How does the abutment correct the angulation of the implant?

By angling the abutment to correct the tipping of the tooth Signup and view all the answers

What is a key consideration when restoring an implant?

The forces and how the implant responds to them Signup and view all the answers

What is a key difference between an implant and a natural tooth?

The way the implant responds to forces Signup and view all the answers

What type of crown is used in certain cases where the abutment corrects the angulation?

Cement-retained crown Signup and view all the answers

What is the protective function of the jaw when biting into a hard object?

To automatically open the jaw Signup and view all the answers

What is the likely consequence of an implant placed too closely to the adjacent tooth?

Increased risk of antibiotic problems and root canal Signup and view all the answers

What may be the result of a dentist's failure to respond to a patient's phone calls after an implant placement?

Patient experiences severe pain and seeks emergency care Signup and view all the answers

What is the primary benefit of having a dental implant placed instead of prosthetics on adjacent teeth?

To avoid compromising the adjacent teeth Signup and view all the answers

What is the significance of the patient's sedation during the implant placement procedure?

It prevents the patient from feeling pain during the procedure Signup and view all the answers

What is the likely outcome of an implant invading the periodontal ligament and touching the surface of the adjacent tooth?

Increased risk of antibiotic problems and root canal Signup and view all the answers

What is the primary advantage of simulated bone cutting in the lab?

It provides a realistic simulation for dental students Signup and view all the answers

What is the significance of cutting hard tissue in the lab?

It provides a realistic simulation of working with real teeth Signup and view all the answers

What is the likely outcome of a dentist's failure to diagnose an implant-related problem?

Patient experiences severe pain and seeks emergency care Signup and view all the answers

What is the primary benefit of bisecting a tooth in the lab?

It helps diagnose implant-related problems Signup and view all the answers

What is the likely consequence of an implant placed too closely to the adjacent tooth, in terms of restorative complications?

Increased risk of restorative complications Signup and view all the answers

Study Notes

Implant Stability and Biological Response

Mechanical retention occurs immediately after implant placement with no biological activity.
Initial instability observed post-implantation due to trauma, with osteoblast death and osteoclast activity.
It takes about three months for biomechanical stability to increase, characterized by a biphasic stability pattern.
Roughened surface implants show less dip in stability compared to smooth or machined surfaces, stabilizing at a higher level after three months.

Significance of Screw Loosening

Screw loosening often signifies implant trouble and is the first failure indicator before other issues like fractures occur.
Common causes of screw loosening include improper occlusion, identified as the main reason for complications by Goodacre's research.
Initial response to screw loosening is usually tightening, but repeated looseness indicates underlying issues.

Internal vs. External Connections

Internal connections in implants reduce screw loosening complications compared to traditional external hex connections.
Various internal connection designs exist (e.g., different point configurations) that facilitate more accurate restorations without guesswork.
Restoration methods can be either cement-retained or screw-retained, chosen based on specific case needs.

Two-Stage Implant Placement Procedure

A two-stage implant placement involves initial positioning, covering with a screw, and allowing healing before further restoration.
The healing cap is placed after the cover screw is removed, allowing the tissue to heal around the implant.

Forces Applied to Dental Implants

Implants lack sensory feedback, unlike natural teeth, which respond to occlusal forces with protective functions.
Signs of problematic forces include restorative failures such as screw loosening or prosthesis fractures.
Forces can lead to complications without the patient being aware until significant failures occur.

Case Studies in Implant Failures

Instances of implants affecting adjacent teeth highlight the importance of correct placement away from the periodontal ligament.
Complications can occur if an implant is placed too close to an adjacent tooth, leading to severe pain and unintended damage.

Practical Application

Students will gain hands-on experience in implant placement and restoration techniques, assessing stability and managing forces within simulated environments.
Understanding of biological, mechanical, and restorative factors is crucial for successful dental implant therapy.

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Description

This quiz covers the concept of osseointegration, the process by which an implant becomes stabilized in the body. Understand the factors affecting implant stability, including the initial trauma caused by implant placement and the role of osteoblasts.