Minimally invasive treatment, maximum preservation of pulp vitality and prolonging tooth life are important development trends in contemporary endodontic treatment. In recent years, scholars have devoted themselves to the biological basis of living pulp preservation, clinical operation specifications and new types of pulp capping materials, and the clinical success rate of vital pulp therapy(VPT) has been significantly improved. In clinical operation, infection control is the key link of treatment and the most critical factor to ensure its success rate. Based on the latest research and guidelines, this paper summarizes the key points of infection control in the treatment of vital pulp therapy, from the aspects of preoperative diagnosis, intraoperative operation and postoperative repair, in order to provide references for clinical development of vital pulp therapy and future development in this field.

As the most common surgical operation in oral surgery clinics, the core of mandibular third molar extraction is to effectively relieve the resistance of adjacent teeth, bone and soft tissues. Mesial and horizontal impaction, the most prevalent form of impaction, frequently results in the coexistence of adjacent teeth and bone resistance due to their anatomical position. The evolution of surgical instruments, from the splitting chisel method to high-speed turbine handpiece technology, and the subsequent development of novel instruments such as ultrasonic bone knives, has underscored the pivotal role of the sectioning method in overcoming resistance. This article reviews the sectioning methods and techniques in minimally invasive extraction of mandibular third molars, with a view to improving extraction efficiency and serving as a reference for clinicians.

Objective: To explore the effects of remimazolam combined with remifentanil on oral surgery. Methods: A total of 94 patients who underwent oral surgery at Dalian Stomatological Hospital were selected as the research subjects and divided into the experimental group and the control group according to a random number table method, with 47 cases in each group. The control group was induced anesthesia by target-controlled pump injection of remifentanil and propofol, while the experimental group was induced anesthesia by target-controlled pump injection of remifentanil and intravenous injection of remimazolam besylate. The hemodynamic indicators heart rate (HR) and mean arterial pressure (MAP), perioperative analgesic and sedative effects, and the occurrence of adverse reactions during and after the operation were compared between the two groups after entering the room (T0), after the completion of anesthesia induction (T1), at the beginning of the operation (T2), and at the end of the operation (T3). Results: HR and MAP in both groups showed a trend of first decreasing and then increasing (P<0.05), and HR and MAP of the experimental group were lower from T2 to T3 (P<0.05). The visual analogue scale (VAS) of the two groups showed a trend of first decreasing and then increasing (P<0.05), and the VAS score of the experimental group was lower at 2 hours, 6 hours, 24 hours after the operation (P<0.05). The Ramsay scores of the two groups showed a trend of increasing first and then decreasing (P<0.05), and the Ramsay score of the experimental group was lower from T0 to T3 (P<0.05). There was no statistically significant difference in the incidence of intraoperative and postoperative adverse events between the two groups (P>0.05). Conclusions: Remimazolam combined with remifentanil in oral surgery can effectively reduce intraoperative hemodynamic fluctuations in patients, exert good analgesic and sedative effects, and have relatively few adverse reactions, which can provide a reference for clinical application.

Objective: To design a mobile intelligent terminal-based system for the recycling and exchange of reusable dental instruments, which can effectively enhance work efficiency and the accuracy rate of instrument exchanges, reduce physical exertion of personnel, and ultimately improve the quality of medical services. Methods: The nursing team and software engineers, formed a research group to design and establish a mobile intelligent management based on oral reusable instrument recycling exchange system. Collect feedback from medical staffs on the oral reusable instrument recycling exchange system after use, and compare the difference in daily average time consumption and frequency of exchange errors between using traditional mode and mobile intelligent management system for oral reusable instrument recycling and distribution. Results: The results showed that the system significantly reduced the time required for instrument recycling and distribution, and the difference was statistically significant (P<0.001); comparing the frequency of exchange errors between traditional mode and mobile intelligent management system, it was found that the system had a statistically significant decrease in the frequency of instrument exchange errors during the instrument recycling and distribution process (P<0.001). A satisfaction survey was distributed to medical staffs, and the results showed that the satisfaction rate of applying the system to clinical work reached 93.62%. Conclusions: The oral reusable instrument recycling exchange system under the mobile intelligent management mode meets the daily instrument management needs and has certain advantages in reducing time consumption and error rates, improves the standardization and efficiency of instrument management, and optimizes the nursing quality. It has a high acceptance rate among clinical medical staffs and strong promotion.

Objective: This case reported an adult with severe periodontitis with deep overjet and dentition defect, who treated with combination of periodontal-orthodontic-implantation multidiscipline treatment. Diagnosis and treatment: After making the treatment plan, the teeth with severe periodontitis were extracted and the periodontal basic treatment was performed. After re-examination, the periodontal status was stable and orthodontic treatment began. After 30 months of treatment with clear aligners, the dental space was closed, and the overjet and occlusal relationship were improved. The left maxillary sinus floor lift was performed before the implantation, and after 6 months, the missing teeth were repaired. Results: After treatment, the patient achieved stable periodontal condition, optimal overjet and profile and good effect of missing teeth restoration. Conclusions: In the treatment of severe periodontitis with malocclusion, multi-disciplinary diagnosis and treatment can comprehensively analyze the problems of patients and formulate detailed treatment plans, which is of great importance to maintain longtime oral health for patients.

Objective: In this case, an adult with skeletal ClassⅡ malocclusion and open bite was treated with clear aligners in combination with miniscrews and tongue spurs. Diagnosis and treatment: An adult female with skeletal ClassⅡrelationship, molar ClassⅠ relationship, hyperdivergent profile and anterior open bite was treated with clear aligners. The miniscrews were implanted in the molar regions for molar intrusion. The tongue spurs were placed in the anterior teeth to correct tongue thrusting habit. Results: After 26 months of orthodontic treatment, the open bite was closed, and bilateral ClassⅠmolar/canine relationship, dental midline consistency were achieved with optimal root parallelism, reduced ANB and mandibular plane angle. The lateral facial esthetics was improved as well. These treatment results were proved to be stable after six months of retention. Conclusions: Clear aligners combined with miniscrews for molar intrusion can provide effective vertical control during the treatment of skeletal Class Ⅱ malocclusion with a hyperdivergent profile and open bite. Tongue spurs are effective in correcting tongue spitting habits at the same time.

The 20^th CPC National Congress highlights the key role of ideological and political education in talent cultivation. The standardized medical residency training is an important practice stage of medical training, in which, clinical teaching with ideological and political education (CT-IP) is of great significance in cultivating doctors with talent skills and ethics. However, current practices in dental residency training reveal significant challenges, such as fragmented understanding of CT-IP principles and insufficient integration of ideological elements into clinical curricula, which hinder the effective cultivation of morally and professionally competent medical personnel. To address these issues, the following strategies are proposed: clarifying educational objectives, strengthening teacher teams, optimizing teaching content and methods, and improving evaluation systems. These measures aim to harmonize ideological and political education with professional training, fostering well-rounded medical professionals who contribute to national health and social progress.

Objective: To evaluate the effect of scenario simulation combined with case-based learning (CBL) in improving doctor-patient communication skills of residents of general dentistry. Methods: This study selected eight typical and disputed clinical cases to design physician-patient communication scenarios, establishing a simulated case database for dental communication training. The research was carried out on 17 residents of general dentistry from Department of General DentistryⅡ, Peking University School and Hospital of Stomatology from September 2023 to August 2024. After completing the theoretical knowledge of doctor-patient communication, the students’ doctor-patient communication abilities were evaluated by the teachers using the set elicit give understand end (SEGUE) framework. After the completion of the scenario simulation combined with CBL teaching, the teachers evaluated again. At the same time, students were asked to evaluate the course by questionnaire. Results: The total score of the initial evaluation of the scale was (18.00±2.29), and the total score increased to (22.41±1.54) after the training, and the difference was statistically significant (P<0.05). The scores of the residents in the preparation stage, information collection stage, understanding the patient stage, and the end of the inquiry stage were all improved statistically. Most of the students thought that the course was necessary, and they had a strong sense of involvement and promotion. Conclusion: Scenario simulation combined with CBL teaching mode can improve the participation and the communication skills of the residents in the standardized training of general dentistry, and can be popularized and applied in the training base in the future.