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open access
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ISSN : 0376-4672
Objectives: The purpose of this study was to evaluate the risk factors associated with grade retention and national exam failure in the school of dentistry. Methods: The subjects of this study were students who enrolled at the school of dentistry from 2013-2017. Univariable and multivariable analyses were examined through logistic regression analysis. The potential contributing factors of grade retention and national exam failure include: graduated high school, graduated college, major, admission score, admission type, decision type, gender, age at the time of admission, and dental school Grade Point Average(GPA). Results: Higher dental school score correlated with lower risk of grade retention or failing national exam, but undergradu ate GPA was not related to the risk of national exam failure. Older students and specific admission types had higher risk of repeating school year. Conclusion: It's important to provide focused guidance for high-risk students, especially those with average of dental school score below 80, to prevent grade retention or national exam failure. Developing a student achievement monitoring system can help prevent grade retention or national exam failure.
Duration of administration of related medications, presence of bacterial infections in necrotic areas, and methods of treat ment have been suggested as factors related to the recurrence of MRONJ. The purpose of this study was to investigate recur rence risk factors in patients who had undergone surgical treatment. The recurrence rate was statistically significant when the teeth affected by alveolar bone necrosis were removed together. When comparing patients who received post-operative antibiotic treatment, recurrence was significantly reduced. Comprehensive surgical approaches, including the extraction of adjacent teeth during surgery, and appropriate post-operative antibiotic therapy can be effective strategies for reducing the recurrence rate of MRONJ.
Dental implants that restore lost teeth are no longer a difficult choice. In past years, osseointegration and mar ginal bone level stability were regarded as success criteria. However, clinicians and patients consider aesthetic requirements a critical success factor. Therefore, the review of literatures and cases was conducted from a surgi cal point of view when placing implants for the long-term results with desired requirements. The author demonstrated that 1) appropriate 3D implant placement position (vertical position of depth and distance considering the attachment level of adjacent teeth; horizontal position considering the outer edge of the jaw bone), 2) appropriate bone width around the implant and surrounding gingiva (buccal bone, keratinized gingiva, thickness above the implant, vestibular depth) area needed for esthetic and functional implants.
For the long-term success of implants, not only the implant surgery but also the design of the prosthesis is im portant. The subgingival part of an implant prosthesis should be designed to avoid bone interference, maintain the volume of surrounding soft tissue, and be easy to clean. The supragingival part of the prosthesis must be manufactured so that food does not accumulate, is easy to clean, and forms appropriate occlusion. In this paper, I will describe the appropriate form of implant prosthesis for a successful long-term prognosis.