Volumetric Bone Measurement Around Dental Implants Using 3D Image Superimposition: A Methodological and Clinical Pilot Study
| Autor: | Mário Vaz, Eduardo Aydos Villarinho, Álvaro Vigo, Nuno V. Ramos, Rosemary Sadami Arai Shinkai, André Correia |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Male
Cone beam computed tomography Image quality Radiography medicine.medical_treatment Alveolar Bone Loss Dentistry Pilot Projects Bone tissue Crown (dentistry) Perimeter 03 medical and health sciences Imaging Three-Dimensional 0302 clinical medicine medicine Humans Superimposition 030212 general & internal medicine Dental Implants Orthodontics business.industry Dental Implantation Endosseous 030206 dentistry General Medicine Cone-Beam Computed Tomography Middle Aged medicine.anatomical_structure Radiographic Image Interpretation Computer-Assisted Female Implant Oral Surgery business |
| Zdroj: | The International Journal of Prosthodontics. 31:23-30 |
| ISSN: | 0893-2174 |
| DOI: | 10.11607/ijp.5366 |
| Popis: | Purpose: This study describes the development of a methodology for using three-dimensional (3D) image superimposition to measure volumetric changes in bone level around dental implants in comparison with linear measures. Materials and Methods: The sample was comprised of 46 dental implants of 6-mm length and 4.1-mm diameter placed in the posterior maxilla and posterior mandible in 20 patients. All implants received screw-retained single crowns. Radiographic images were taken using cone beam computed tomography (CBCT) and digital periapical radiography after implantation and after 12 and 24 months of functional loading (after crown placement). Tridimensional reconstructions of the bone perimeter closest to the implant were developed, superimposed, and volumetrically measured. Linear measures of bone levels were recorded in periapical radiography images. A multilevel regression model tested volumetric and linear bone loss. Results: The mean peri-implant linear bone loss for the first and second years was 0.2 ± 0.4 mm and 0.1 ± 0.2 mm, respectively, and the mean volumetric bone loss for the first and second years was 7.2 ± 6.1 mm3 and 6.4 ± 7.8 mm3, respectively. It was estimated that an increase of 1 mm of linear bone loss was associated with a mean volumetric bone loss of approximately 14 mm3 (P < .001). Conclusion: The findings showed that linear and volumetric bone loss measures are related. Measuring volumetric bone changes around implants is possible provided that the CBCT images have proper contrast and sharpness, particularly around the implant outline. Improvements in image quality and in the filters for bone tissue detection would be important for this methodology to be made faster and used clinically. |
| Databáze: | OpenAIRE |
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