Intentional tooth replantation (ITR) is an advanced treatment modality and the procedure of last resort for preserving teeth with inaccessible endodontic or resorptive lesions. ITR is defined as the deliberate extraction of a tooth; evaluation of the root surface, endodontic manipulation, and repair; and placement of the tooth back into its original socket. Case reports, case series, cohort studies, and randomized controlled trials have demonstrated the efficacy of ITR in the retention of natural teeth that are untreatable or difficult to manage with root canal treatment or endodontic microsurgery. However, variations in clinical protocols for ITR exist due to the empirical nature of the original protocols and rapid advancements in the field of oral biology and dental materials. This heterogeneity in protocols may cause confusion among dental practitioners; therefore, guidelines and considerations for ITR should be explicated. This expert consensus discusses the biological foundation of ITR, the available clinical protocols and current status of ITR in treating teeth with refractory apical periodontitis or anatomical aberration, and the main complications of this treatment, aiming to refine the clinical management of ITR in accordance with the progress of basic research and clinical studies; the findings suggest that ITR may become a more consistent evidence-based option in dental treatment.
Humans ; Tooth Replantation/methods* ; Consensus ; Periapical Periodontitis/surgery*

Instrument separation is a critical complication during root canal therapy, impacting treatment success and long-term tooth preservation. The etiology of instrument separation is multifactorial, involving the intricate anatomy of the root canal system, instrument-related factors, and instrumentation techniques. Instrument separation can hinder thorough cleaning, shaping, and obturation of the root canal, posing challenges to successful treatment outcomes. Although retrieval of separated instrument is often feasible, it carries risks including perforation, excessive removal of tooth structure and root fractures. Effective management of separated instruments requires a comprehensive understanding of the contributing factors, meticulous preoperative assessment, and precise evaluation of the retrieval difficulty. The application of appropriate retrieval techniques is essential to minimize complications and optimize clinical outcomes. The current manuscript provides a framework for understanding the causes, risk factors, and clinical management principles of instrument separation. By integrating effective strategies, endodontists can enhance decision-making, improve endodontic treatment success and ensure the preservation of natural dentition.
Humans ; Root Canal Therapy/adverse effects* ; Consensus ; Root Canal Preparation/adverse effects*

Objective:To evaluate the clinical efficacy of the Kechuansan acupoint plaster combined with acupoint injection of Chuankezhi in treating bronchial asthma. Methods:A total of 65 patients with bronchial asthma, who met the inclusion criteria in Shanghai Municipal Hospital of TCM from June 2018 to September 2018, were selected anddivided into control group and observation group by random number table method, 32 in the control group and 33 in the observation group. The control group was treated with acupoint injection of Chuankezhi, while the observation group was treated with acupoint plaster of Kechuansan combined with acupoint injection of Chuankezhi. Both groups were treated for 6 weeks. TCM syndromes and frequency of acute attackin one year before and after the treatment was scored and recorded. The patients' quality of life was assessed by Asthma Control Test (ACT) and the fractional exhaled nitric oxide (FeNO) level was measured by Sunvou-p100 nakurun breath analyzer to evaluate the clinical efficacy. Results:Through out the treatment, there were 3 dropouts in the observation group and 2 dropouts in the control group. 30 cases were completed in each group. The total effective rate in the observation group was 93.3% (28/30), and the control group was 73.3% (22/30). The difference was statistically significant ( χ2=4.320, P=0.038). After the treatment, the scores of TCM syndromes and ACT in the observation groups were significantly higher than those of the control group ( t values were 4.834 and 5.642, respectively, all Ps<0.01). The FeNO in the observation group were significantly lower than those in the control group ( t=3.180, P=0.020). The frequency of acute attack in one year in the observation group was less than that ofthe control group ( t=5.466, P<0.01). Conclusions:Acupoint plaster Kechuansan combined with acupoint injection of Chuankezhi can relieve the clinical symptoms of asthma, reduce the frequency of asthma attack, improve the control ability of asthma, reduce airway inflammation, which is more effective than using acupoint injection therapy alone.

Objective: To observe the effects of medicinal extract for tonifying kidney to relieve asthma on glucocorticoid receptor (GR) expression in rats with asthma, and to explore its mechanism in treating asthma. Methods: Sixty SD rats were randomly divided into normal control group, untreated group, dexamethasone group, and medicinal extract-prevented, medicinal extract-treated, and medicinal extract-prevented and -treated groups, with ten rats in each group. Asthma was induced by intraperitoneal injection of ovalbumin (OVA) and forced inhalation of atomized OVA. Expression of GR in lung tissues was detected by immunohistochemical method. Pathological changes of the lung tissues were observed by HE straining. Results: Expression of GR was lower in the untreated group than in the normal control group (P<0.05). Expressions of GR in medicinal extract groups were up-regulated as compared with those in the untreated group and dexamethasone group (P<0.05, P<0.01), and there were no significant differences as compared with the normal control group (P>0.05). Conclusion: Medicinal extract for tonifying kidney to relieve asthma can increase the expression of GR in lung tissues of asthmatic rats, which may be one of its mechanisms in preventing and treating asthma.

Objective:To investigate the effect of steroid hormones on distribution of uterine natural killer(uNK)cells in the mouse uterus.Methods:A unique uNK cell marker, Dolichos biflorus agglutinin(DBA)lectin was used to localize uNK cells in the ovariectomized and ovarian steroid hormone-treated mouse uterus by immunohistochemical staining.Results: After estrogen(E_2)was administered in the ovariectomized mice, uNK cells were distributed in the stroma of uterine mesometrial pole,as round, immature and small lymphocyte-like cells.With the progesterone(P_4)administered, the immunostaining results showed that DAB-lectin staining were mainly distributed in the vascular endothelial cells.With the combination of E_2 and P_4, DAB-lectin staining was distributed in the matrix of the uterus,seen as a number of small round uNK cells or some as vascular endothelial cells.The effects could be completely abolished by specific antagonists of their nuclear receptors(estrogen and progesterone receptor).Conclusion: The distribution of uNK cells in mouse uteri is collaboratively regulated by estrogen and progesterone.The endometrial uNK cells may be involved in the mechanism of the fetal protective immune reaction during pregnancy.

Severe acute respiratory syndrome is an infectious disease caused by a new type of coronavirus. It belongs to the seasonal febrile diseases in traditional Chinese medicine. The prevention and treatment of severe acute respiratory syndrome (SARS) can be under the guidance of the doctrines for treating febrile diseases of traditional Chinese medicine, treatment based on syndrome differentiation, such as syndrome differentiation of triple energizer, syndrome differentiation according to defensive phase, qi phase, nutrient phase and blood phase. During April and May of 2003, 8 cases of SARS were diagnosed in Shanghai, and 6 patients accepted complementary therapy of traditional Chinese medicine, without death case. The only one patient who didn't take glucocorticoid therapy was complementarily treated with traditional Chinese herbs through the whole treating procedure. Upon the successful treatment of the eight cases of SARS in Shanghai, it is demonstrated that the triple-energizer syndrome differentiation and defensive-qi-nutrient-blood syndrome differentiation in traditional Chinese medicine are of high value in treating SARS patients.

Objective: To assess the psychosomatic symptoms in women referred for in vitro fertilization. Methods: The SCL-90 was administered to 100 women referred for IVF (in vitro fertilization and embryo transfer ) and 100 women referred for ICSI (intracytoplasmic sperm injection) at the time of their first presentation to the infertility clinic. The control group comprised of 100 women presenting to gynecology clinics. In addition, socio-demographic information was captured through a structured questionnaire designed for the purpose of this study.Results:The total scores of two study subgroups and control group were 53.8?30.8, 52.5?31.7 and 42.1?32.3 respectively. It was significantly higher score in study groups than that of in control group(F=3.40, P