Dental implant
![](https://pacs.de/sites/default/files/pictures/thumbs/upload.wikimedia.org/9/1/3/7/3/CT_Scan_for_Dental_Implants_thumb.jpg)
CT Scan for
Dental Implants. This shows eight dental implants superimposed over the lower jaw in areas of maximum bone and four teeth that will be extracted.
![](https://pacs.de/sites/default/files/pictures/thumbs/upload.wikimedia.org/9/1/4/8/7/Periimplantitis_progression_over_5_years_in_heavy_smoker_thumb.jpg)
xray 2 years
after placement then 7 years later in a heavy smoker. Shows progression of periimplantitis
![](https://pacs.de/sites/default/files/pictures/thumbs/upload.wikimedia.org/9/1/5/0/5/Fractured_abutment_screws_3_implants_thumb.jpg)
Fracture of
abutment screws in 3 consecutive implants due to severe over-torqueing. Screw end marked on last implant with red arrows
![](https://pacs.de/sites/default/files/pictures/thumbs/upload.wikimedia.org/9/1/5/0/6/Implant-xray-gif_thumb.jpg)
An implant
ready to be restored. The temporary healing abutment is visible in the mouth.
Dental implants are a common procedure used to replace absent teeth. Radiology has a role in pre-implant planning as well as post-implant assessment including identification of complications.
Radiographic features
Dental cone beam computed tomography (CBCT) is the most common modality used in dental implant imaging.
Pre-implant imaging
Assessment of the density (i.e. quality) and alveolar height and width (i.e. quantity) of bone is key for success implant osseointegration :
- density
- edentulism typically leads to bone loss with resorption of the alveolar process typically affecting width before height. Mandibular bone resorption is centrifugal whereas maxillary is centripetal.
- a number of Bone Quality Indices exist
- Cawood and Howell
- Lekholm and Zarb
- Norton and Gamble
- quantity
- bone implant site needs to be at least 7-9 mm high and 5 mm wide
- measurements should be taken every four sagittal oblique images through the region planned for implant
- other features
- contours
- dental extractions
- periodontal disease
- retained dental roots
- periapical lucencies
- anatomical variations, e.g. mandibular or maxillary tori
- pre-implant sinus lift or other procedure to increase maxillary alveolar ridge height and width
Siehe auch:
- Periimplantitis Zahnimplantat
- MRT bei Zahnimplantaten
- Artefakte durch Zahnimplantate
- Sinus-Lift-Prozedur
und weiter:
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