IADR Abstract Archives
Radiopaque Micro-Fillers for High-Resolution 3-D Radiographic Imaging of Periodontal Pockets
Objectives: The current paradigm for periodontal diagnosis and long-term maintenance depends on measuring periodontal pockets depth by conventional periodontal probing. This technique has many limitations, including the inability to visualize the shape and volume of pockets in 3-D. The present research investigates the feasibility of cone beam CT (CBCT) to image simulated periodontal pockets in 3-D, using radiopaque gels for accurate depth and volume measurement of the periodontal pockets (utility patent U.S. application No.14/789,584). This study aims to test the hypothesis that the depth and volume of periodontal pocket analogues will be accurately estimated using cone beam CT with a formula containing radiopaque micro-fillers technology.
Methods: This study employed 2 models: a preserved pig jaw model and a human skull model, the latter with artificial gingiva applied to the teeth. Artificially created periodontal pockets were created by intra-sulcular incision to the level of bone around the teeth of the two models. The depths of the pockets were measured manually by periodontal probing from the gingival margin to the level of the bone. Radiopaque contrast medium was expressed into the periodontal pockets and the volume injected to fill the defect has been determined manually. CBCT images were obtained using i-CAT machine, while Analyze 11.0 software was used to determine the depth and volume of the periodontal pockets injected with the contrast medium. Statistical comparison of the depth and volume measurements obtained from the two methods has been performed.
Results: Lin's concordance correlation coefficient test revealed that the depth and volume measurements by CBCT had an excellent agreement (0.9384-0.9907) with those obtained by the manual methods in human skull and pig jaw models.
Conclusions: CBCT technology with the aid of radiopaque contrast medium could provide a novel approach for diagnosis and treatment planning of periodontal disease especially in complicated cases.
Methods: This study employed 2 models: a preserved pig jaw model and a human skull model, the latter with artificial gingiva applied to the teeth. Artificially created periodontal pockets were created by intra-sulcular incision to the level of bone around the teeth of the two models. The depths of the pockets were measured manually by periodontal probing from the gingival margin to the level of the bone. Radiopaque contrast medium was expressed into the periodontal pockets and the volume injected to fill the defect has been determined manually. CBCT images were obtained using i-CAT machine, while Analyze 11.0 software was used to determine the depth and volume of the periodontal pockets injected with the contrast medium. Statistical comparison of the depth and volume measurements obtained from the two methods has been performed.
Results: Lin's concordance correlation coefficient test revealed that the depth and volume measurements by CBCT had an excellent agreement (0.9384-0.9907) with those obtained by the manual methods in human skull and pig jaw models.
Conclusions: CBCT technology with the aid of radiopaque contrast medium could provide a novel approach for diagnosis and treatment planning of periodontal disease especially in complicated cases.