A Simplified Approach to Implant Restorations - Exam 62
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Digital impressions and CAM/CAD systems are currently burgeoning dental technologies. This article presents a case study describing the clinical protocol necessary to produce multiple crown restorations supported by dental implants.

Questions:
 1) The direct method of acquiring a digital impression for implant restorations has all of the advantages except:
  1. Reduced chances for creating perpetuation fabrication errors
  2. Reduces the number of steps and chances for compounding production errors
  3. Are less accurate than the conventional impression tray and casting procedures
  4. Can allow for direct production of a restoration in office via a milling device
 2) The Triosï¾® system described in this case study:
  1. Employs an in-office milling device
  2. Uses an indirect crown construction protocol
  3. Inputs data with an optical wand using a sweeping motion
  4. Scans encoded healing abutments
 3) Using the optical scanning procedure in this article has the capability of capturing the soft-tissue bed topography above the platform by:
  1. Taking a single scan of the implant scan body and extrapolating the soft tissue contours
  2. Requires the traditional PVS scan of the soft tissue bed if soft tissue contours are required
  3. Two optical scans of the implant site are acquired, One with the scan body and another without the scan body
  4. It is impossible to get the soft tissue contours with this technique which is a disadvantage of this technique
 4) All of the following are true except:
  1. The 3Shape Trios system used in this article uses video-rate capture technology to allow for rapid acquisition of the tooth and arch of interest
  2. Scan abutments that are required for digital implant impressions are specific for each implant manufacturer and platform type
  3. This techniques is only stable for single tooth restorations
  4. The digital technique is more accurate than convention techniques primarily due to the potential for compounding processing errors associated with the latter technique
 5) Scanning abutments used in this protocol were:
  1. Generic
  2. Radiopaque
  3. Provided by the scanner company
  4. Fitted to an internal implant interface connection
 6) The restorations created in this case study:
  1. Are supported by custom milled zirconium abutments
  2. Were constructed as porcelain fused to metal crowns
  3. Attached directly to the implants
  4. Required few adjustments