Implant Design & Fabrication Flashcards
7 cards from real CIT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Implant Design & Fabrication flashcards as text
The 'critical healing zone' concept in implant design refers to which anatomical region and its associated biological events?
Answer: The coronal 2-3mm of crestal bone where biological width establishes
The coronal crestal bone region is the 'critical healing zone' where biological width establishment determines long-term crestal bone stability.
A bone-level implant placed at the crestal bone with a 4.1mm platform requires an abutment with which emergence profile consideration?
Answer: Narrow emergence that gradually widens to the crown diameter
A sub-crestal or crestal bone-level implant requires a gradually widening emergence profile to support peri-implant soft tissue architecture and mimic natural tooth anatomy.
When selecting implant diameter for a mandibular first molar site with adequate bone width, which dimension is most commonly recommended?
Answer: 4.5-5.0mm wide diameter
Wide-diameter implants (4.5-5.0mm) are preferred for mandibular molar sites to better replicate the wider root footprint and distribute occlusal forces.
In laser surface modification of titanium implants (SLActive/Laser-Lok), what is the primary mechanism for enhanced soft tissue integration?
Answer: Parallel circumferential microgrooves that orient connective tissue fibers perpendicularly
Laser-Lok microgrooves create a physical template that guides connective tissue fiber orientation perpendicular to the implant surface, creating a functional soft tissue attachment.
A 'morse taper' internal connection in an implant system refers to which design characteristic?
Answer: A conical friction-fit connection with a taper of 5-8 degrees
Morse taper connections use a precise conical fit (5-8°) creating a cold-weld friction seal that minimizes micromovement and the implant-abutment microgap.
Which factor most critically determines the minimum required bone height above the inferior alveolar nerve (IAN) when placing a standard 10mm implant?
Answer: A minimum 2mm safety margin below the implant apex
A minimum 2mm safety margin between the implant apex and the IAN canal is the standard to prevent nerve injury from drilling or implant pressure.
The 'prosthetic table' concept in wide-platform implants is designed to:
Answer: Provide a broader implant-crown junction to reduce cantilever stress on the abutment screw
A wider prosthetic table (platform) on broad-diameter implants reduces the lever arm and bending stress on the abutment screw, improving long-term mechanical reliability.