Search in:
Use the search below to find a dentist anywhere in the world!
Filter by category:
Filter by country:
Filter by type of treatment:
  • We Recommend We Recommend
    dental clinics, dental offices, dental hygienist
    We Recommend
    GO to Dental Clinic
  • Dental Services Dental Services
    find dental services and more
    Dental Services
    GO to Dental Service
  • Medical News Medical News
    read about dentistry, dental implants, cosmetic dentistry
    Medical News Periodontics
    Gum conditions - the most common cause of tooth loss in the adult population. "Ignore you teeth and you will lose them!" You should be able to use your teeth throughout...
    GO to Medical News
  • Medical Dictionary Medical Dictionary
    quick access to medical terms
    Medical Dictionary Gain-of-function mutation
    A mutation that confers new or enhanced activity on a protein. Loss-of-function mutations, which are more common, result in reduced or abolished protein function.
    GO to Dictionary
  • Dental Products Dental Products
    medical equipment, dental supplies, dental equipment
    Dental Products
    GO to Dental Product
  • Case Studies Case Studies
    case study examples, medical case studies, dental case study
    Case Studies What are dental sealants?
    Dental sealants are thin plastic coatings that are applied to the grooves on the chewing surfaces Deep pits and fissures are the source of some 80 % of tooth cavities. This is mainly because...
    GO to Case Studies
  • Dental Forum Dental Forum
    dentist forums, dental fear forum, dental phobia forum and more
    Dental Forum Dental Bridges
    Topics of discussion about Dental Bridges
    GO to Dental Forum
Join our newsletter!
 newsletter Join our newsletter! Subscribe arr
» G protein - A guanine nucleotide binding protein in cells[...]
» Race - An ethnic stock or division of humans.[...]

» Botox - System
   Topics of discussion about Botox

» Gingivitis Treatment - System
   Topics of discussion about Gingivitis Treatment

3D Digital Images

Reset Decrease Increase
3D Digital Images
Dentures: 3D Digital Images Of Tooth Contours May Replace Plaster Models.
When a toothache makes a visit to the dentist unavoidable this often marks the start of a time-consuming treatment marathon for the patient. If the tooth cannot be saved and a dental prosthesis is necessary, the dentist first has to make a silicone impression for the dental laboratory. The patient is sent home with a provisional repair and dental technicians set to work on modeling a plaster impression. The model is then scanned using digital cameras and from the geometric measurement data obtained the matching dental prosthesis is produced.

The intricate and laborious route from bite impression and plaster mold to model scanning in the laboratory could soon be a thing of the past. “The three-dimensional coordinates of the tooth surface can be determined on the basis of measurements taken in the patient’s mouth,” says Dr. Peter Kühmstedt, group manager for 3-D measurement technology at the Fraunhofer Institute for Applied Optics and Precision Engineering IOF in Jena.

Under a contract from German dental company Hint-Els, an expert team at the Fraunhofer institute developed an optical digitization system which scans the oral cavity and captures three-dimensional data of the teeth using camera optics. A complete picture of the individual tooth is created from several data records. After an all-round measurement, it is even possible to represent the complete jaw arch as a virtual computer image. The measurement conditions in the confined oral cavity are, however, unfavorable.

To obtain precise results, the scientists use fringe projections in which a projector shines strips of light on the tooth area to be measured. From the phase-shifted images the evaluation software determines the geometric contour data of the tooth. Two camera optics provide the sensor chip with image information from different measurement perspectives. After the pixel-precise comparison of various camera images, the evaluation program recognizes any image faults and removes them from the complete image.

It is problematic if the patient moves while the images are being taken in the oral cavity. The scientists have therefore made sure that the process takes place quickly. “The image sequence for each measurement position is captured in less than 200 milliseconds,” explains Kühmstedt.


This article has been read by 1190 visitors.
Comments - Add your comment!
* - Required fields
Choose avatar: *    
Name *
Email * Will not be displayed
Comment *
2000 characters remaining
Security check
Enter the code below in the field next to it:
*This code help us prevent automated requests.

We welcome both positive and negative comments.
Do not include:
- Email addresses, phone numbers or other personal information that belong to you or to other people;
- Personal Ads;
- References to other comments or users who have posted comments;
- Obscene or offensive words.
Choose avatar: