Background:The aim of this study was to evaluate the prognosis of minimal invasive horizontal alveolar ridge augmentation using small incision and subperiosteal tunneling technique.Methods: This study was conducted on 10 partially edentulous patients with horizontal alveolar bone deficiency in 12 areas that need horizontal alveolar ridge augmentation for future implant placement. Cone beam computer tomography was done for sites that need implant placement preoperatively. Xenogeneic bone was used for grafting deficient horizontal alveolar ridge sites using the flap technique in 6 areas and using the subperiosteal tunneling technique in another 6 areas for future implant placement. Cone beam computer tomography was done for grafted sites immediately postoperative and 6 months postoperative.Results: This study was conducted on 10 patients and included 12 implant sites. No complications related to bone grafting were found and there was an adequate clinical prognosis.Regarding the difference from pre-operatively to 6 months post-operatively, a slightly higher increase in ridge width was recorded in subperiosteal tunnel group (1.48±0.99) in comparison to flap group (0.91±0.94), with no statistically significant difference (p=0.086).
Conclusions:The bone graft material retained within a pouch formed using small incision and subperiosteal tunneling technique resulted in additional increase within the width of the alveolar ridge than the flap technique.
Purpose: To compare success rate as well as difference of marginal bone loss around immediately placed non-functionally loaded implants in osteoporotic patients versus non-osteoporotic patients. Material & Methods: The present study was conducted on 12 patients, six of them were osteoporotic and the other six were normal healthy patients. Both groups underwent immediate post extraction implantation, with a total of 16 implants. Each patient was a candidate for single tooth replacement in the mandibular arch at the premolar area. CBCT was performed at the intervals of immediately after implant installation and 6 months postoperatively. This is to determine radiographic bone loss from initial surgery. Periotest was used to determine the implant mobility at the intervals of immediately after implant installation and 6 months postoperatively. Results: The marginal bone level (flushed implant-bone crest to implant apex) baseline records at time of implant placement was used for all cases as a reference. And then, measurements were taken again after six months to detect the change in the marginal bone level for both groups. After 6 months, the mean marginal bone loss of the osteoporotic group was slightly higher than the normal group but yet not of significant difference. There was no statistically significant bone loss difference between the two groups either in coronal or sagittal sections.
Aim: This study aimed to evaluate biological and prosthetic complications of cantilevered and non-cantilevered fixed hybrid metal acrylic prostheses used for vertical and inclined implants in atrophied mandible. Materials and Methods: Eight completely edentulous individuals will be classified into 2 groups randomly: 1) Group I (cantilevered prosthesis, n=4): patients received 4 vertical implants parallel to each other's in the interforaminal area and cantilevered metal acrylic prosthesis, 2) Group II (non-cantilevered prosthesis, n=4): patients received 4 implants (2 parallel anterior implants and 2 posterior implants inclined 30 o distally) and non-cantilevered metal acrylic prosthesis. Biological and prosthetic complications were measured after one year from prosthesis insertion. Results: There was no significant difference in implant failure, implant survival, pain, swelling, abscess, fistula formation, peri-implantitis, peri-implant mucositis, bleeding on probing between groups. The non-cantilevered group showed significantly higher pocket depth than the cantilevered group. The cantilevered group showed significantly higher bone loss than the non-cantilevered group. There were no prosthesis fractures, cylinder fracture, abutment fracture, and prosthetic screw fracture occurred in both groups. There was no difference in teeth wear, teeth fracture, and gingival fracture between groups. The cantilevered group showed a significantly higher crown fracture, abutment screw, and prosthetic loosening than the non-cantilevered group. Conclusion: Both cantilevered and non-cantilevered fixed hybrid metal acrylic prostheses can be used successfully for vertical and inclined implants respectively in atrophied mandible with favorable biologic and prosthetic outcomes after one year. However, with exception of increased pocket depth, the non-cantilevered group was advantageous regarding reduced bone loss, crown fracture, abutment, and prosthetic screw loosening, compared to the cantilevered group.
This work presents three automated pre-trained models to predict the difficulty of extracting the mandibular third molar using a dataset of 2414 panoramic radiography images based on pre-processed (shifted and rotated) from left and right mandibular third molar instances. In this research, we employed the four distinct architectural models, namely VGG-16, VGG-19, MobileNetV2, and ResNet50 to identify the difficulty of removing a mandibular third molar. We categorized the dataset into four categories of complexity to help in categorization (Normal, Easy, Medium, and difficult). As a result, VGG-16, VGG-19, MobileNetV2 and ResNet50 had prediction accuracies of 81%, 82%, 79% and 44%, respectively. Findings affirmed that the proposed deep learning model using VGG-19 could be a good tool to predict the difficulty of extracting a mandibular third molar using a panoramic radiographic image.
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