Dental Implant Hex Connections

What is the primary function of the hex area in an implant body-abutment connection?

To provide a microbial seal
To act as a retentive mechanism and anti-rotation element (correct)
To distribute the load of the implant
To facilitate screw tightening

What is a major advantage of internal hex connections over external hex connections?

Improved microbial seal and better joint strength (correct)
Greater platform switching options
Less historical literature on internal connections
Higher prevalence of screw loosening

What is a disadvantage of internal hex connections compared to external hex connections?

Less screw loosening
Higher prevalence of rotational misfit
Weaker designs and diameters in certain cases (correct)
Inadequate long-term follow-up data

Which of the following is a limitation of external hex connections?

Higher prevalence of screw loosening and rotational misfit (D) Signup and view all the answers

What is a benefit of using external hex connections?

Long-term follow-up data are available (B) Signup and view all the answers

What is the main goal of treatment planning in relation to dental implants?

To minimize and evenly distribute mechanical stress in the implant system (C) Signup and view all the answers

What type of load is most destructive to the bone-implant interface?

Shear load (C) Signup and view all the answers

What is the primary function of compressive loads in dental implants?

To maintain the integrity of the bone-implant interface (A) Signup and view all the answers

What is a factor that affects the load-bearing capacity of implants?

Shape and dimension of the implant (A) Signup and view all the answers

What type of bone is strongest in compression?

Cortical bone (C) Signup and view all the answers

What is an advantage of using wider diameter implants?

It allows for a more favorable distribution of stress in the surrounding bone (C) Signup and view all the answers

What is the primary function of the original Brånemark protocol?

To restore fully edentulous arches (A) Signup and view all the answers

What is a limitation of wider diameter implants?

Esthetic requirements for a natural emergence profile (D) Signup and view all the answers

What happens to the stress level on longer implants?

It decreases due to the increased surface area (C) Signup and view all the answers

What is the common range of lengths for dental implants?

8-15 mm (B) Signup and view all the answers

What is the effect of an increase in implant diameter on the maximum value of Von Mises equivalent stress?

It decreases the maximum value of Von Mises equivalent stress (B) Signup and view all the answers

What is a benefit of using implants with a larger diameter?

They allow for engagement of a maximal amount of bone (A) Signup and view all the answers

What is the survival rate of ultrawide implants of ≥6 mm in diameter?

98.28% (D) Signup and view all the answers

What was the mean postloading follow-up period in the study of 205 patients?

30 months (B) Signup and view all the answers

What is the diameter of the HA-coated implants reported by Griffin and Cheung?

6 mm (D) Signup and view all the answers

What was the overall cumulative survival rate for up to 68 months after loading in Griffin and Cheung's study?

100% (B) Signup and view all the answers

What is the mean loading period in Anner et al's study of 45 implants?

2 years (A) Signup and view all the answers

What is a factor that affects the success of short implants?

Type of prosthesis (D) Signup and view all the answers

What is the primary focus of osseointegration?

The connection between the implant and the surrounding bone tissue (A) Signup and view all the answers

What is the difference between a roughened and a smooth surface implant?

The interaction of cells involved in osseointegration (D) Signup and view all the answers

What is zirconia, and how is it produced?

A ceramic, produced through a process of reductive chlorination (B) Signup and view all the answers

What is the main difference between a one-stage and a two-stage implant approach?

The timing of the implant's placement and loading (A) Signup and view all the answers

What is the purpose of bio markers such as alkaline phosphatase and osteocalcin?

To assess the level of osseointegration (A) Signup and view all the answers

What is the term for the process of creating a rough surface on a titanium implant?

All of the above (D) Signup and view all the answers

What is the function of PGE2 prostaglandin in osteoblast activity?

Required for osteoblast activity, and cell response to surface structure (C) Signup and view all the answers

What is the primary difference between a one-stage and a two-stage implant approach?

Number of surgeries required (B) Signup and view all the answers

What is the role of TGF-β1 in implant placement?

Enhances the mineralization & expression of bone-specific extracellular matrix proteins (B) Signup and view all the answers

What is the function of alkaline phosphatase in osteoblast differentiation?

Early marker for osteoblast differentiation (B) Signup and view all the answers

What is the characteristic of a tissue-level implant?

Almost always a one-stage approach (C) Signup and view all the answers

What is the purpose of osteocalcin in osteoblast activity?

Late marker for osteoblast activity (D) Signup and view all the answers