Background:The aim of the present study is to assess the image quality of multislice and cone-beam computed tomography using water, plaster of paris, and motor oil (WPO) phantom. Methods: A test object (radiographic phantom) were constructed, made up of 3 aligned acrylic cylinders filled with: (1) Distilled water, (2) Bubble free plaster, and (3) Motor oil. Subsequently, the cylinder was scanned with CBCT and MSCT using 3 FOV sizes with the cylinder positioned in the center of the FOVs. Test is made using multislice CT and 3 machines CBCT Planmeca, Vatech and Neotome. Results In the present study, Neotome, Planmeca and Vatech showed high significant measurements than MSCT in Plaster of Paris and Motor oil. The results of this study showed an excellent correlation between the voxel values from CBCT and the Hounsfield units derived from MSCT. Conclusion:In assessing density using CBCT, the Y = 0.682 (x) -161 equation is therefore recommended.
INTRODUCTION: The study aims as a pilot study to evaluate the effect of different treatment regimen and different types of endodontic sealers on pain and periapical radiographic changes was studied. MATERIALS AND METHODS: Forty patients in need of an endodontic root canal treatment on anterior teeth were selected and divided into two groups (20 patients each), according to the endodontic treatment protocol (single or multiple visits). Then, each group was subdivided into two subgroups according to sealer used 10 each (AH Plus Jet resin sealer, Total Fill Bioceramic Sealer). To record pain intensity of the patients at different intervals: 1, 2, 3, 7 days, a visual analog scale was used. Furthermore, patients were recalled after 1, 3, 6, 9 months to evaluate periapical radiographic changes. RESULTS: Showed that as regard pain assessment both tested endodontic sealers, as well as single or multiple visits have no statistically significant difference between pain values of patients during all the observation period from immediately post-operative, after 4, 12, 24, 48, 72 h as well as after 7 days (p > 0.05). As regard lamina dura thickness, results showed that with both tested endodontic sealers as well as single or multiple visits, there was no statistically significant difference between lamina dura thickness of patients after 1 month, 3, 6 as well as after 9 months. CONCLUSIONS: Neither number of visits of endodontic treatment nor type of sealer used for obturation affects post-operative pain and thickness of lamina dura.
Objective: The present study was done to evaluate the marginal bone level around immediate loaded implants using one piece and two piece implants. Subjects and methods: A group of 22 patients were divided into two groups; Group 1: 11 Patients received immediate loaded implant placement using one piece implants. Group 2: 11 Patients received immediate loaded implant placement using two piece implants. According to clinical evaluation; plaque index, gingival index and peri-implant probing depth were recorded and measured at three, six months and nine months; also implant quality score was measured. Radiographically, marginal bone level was measured and bone density and compared in three months, six months, nine months. Results: Group 1 showed a significant decrease in the peri-implant probing depth compared to Group 2. Group 1 showed significant buccal marginal bone loss than Group 2 over all the time intervals. There is no significant difference in the palatal or mesial or distal surface between the two groups. Also no significant difference between the two groups including plaque index or gingival index nor bone density. Concerning the implant quality scale; 100% of group 2 were scale 1, while 50% of group 1 were considered scale 1. Conclusion: Immediate loading of two piece dental implants appeared significantly superior than one piece type.
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