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*

Circadian rhythm is a biological endogenous process regulated by the suprachiasmatic nucleus of the hypothalamus, which transmits light signals to peripheral clocks and synchronizes the body with the external environment through balanced expression of circadian rhythm genes. Working the night shift, sleep disorders, and exposure to artificial light can lead to disturbances in circadian rhythm and genetic imbalances. A substantial body of research has demonstrated that circadian rhythm plays a significant role in the treatment of autoimmune diseases and neurodegenerative disorders, with increasing attention being directed toward their impact on oral health. Disturbances in circadian rhythm primarily affect psycho-neuro-immune mechanisms, oxidative stress responses, and oral microflora through pathways such as the hypothalamic-pituitary-adrenal axis (HPA axis), brain and muscle ARNT-like 1 (BMAL1)-brain-derived neurotrophic factor (BDNF) signaling, and BMAL1-nuclear factor kappa-B (NF-κB) interactions. These disruptions may influence the progression of oral diseases. Certain pharmacological agents (e.g., melatonin, vitamin D, nobiletin, and propofol) have been shown to regulate mood disorders, immune function, and sleep-wake cycles by upregulating BMAL1 expression, thus alleviating disturbances in circadian rhythm. In addition, non-pharmacological interventions, such as sleep management strategies, psychotherapy approaches, and light therapy, also modulate these processes through HPA axis regulation. Currently, the specific mechanisms by which circadian rhythm regulates BDNF levels, T cell subsets, and inflammatory signals—thereby influencing both pathogenesis and treatment outcomes for oral diseases—remain unclear. Future research should focus on elucidating these molecular mechanisms as well as identifying therapeutic targets related to circadian rhythm within the oral health context. Further, multidisciplinary collaboration encompassing pharmacy, sleep behavior studies, and psychology will be instrumental in advancing prevention strategies and treatments for oral diseases.

Objective:To observe the effect of stellate ganglion block(SGB)on the inflammatory response in rats with acute peritonitis,and to explore whether the possible anti-inflammatory mechanism related to the activation of α7nAChR receptor-mediated cholinergic anti-inflammatory pathway.Methods:A total of 36 SD rats were randomly divided into three groups,with 12 rats in each group:sham operation group(S group),acute peritonitis group(AP group)and SGB treatment group(SGB group).2%acetic acid(1 ml/100 g)was intraperitoneally injected to prepare acute peritonitis rat model in AP group and SGB group,and corresponding dose of normal saline was injected into S group.Right cervical sympathetic nerve was separated but not ligated in AP group and S group,the right cervical sympathetic nerve was severed and ligated in SGB group.Abdominal aorta blood samples were collected 24 h after opera-tion,and serum levels of IL-1β,IL-6 and TNF-α were measured by ELISA,pathological changes of peritoneal tissue were observed by light microscope and expression of α7nAChR in peritoneal tissue was measured by Western blot.Results:Compared with S group,se-rum levels of IL-1β,IL-6 and TNF-α in AP and SGB groups were significantly increased(P<0.05).Serum levels of IL-1β,IL-6,TNF-α in SGB group were significantly lower than those in AP group(P<0.05).HE staining of peritoneal tissues in each group revealed that the S group maintained intact peritoneal structure with normal cellular arrangement,while the AP group exhibited disorganized archi-tecture with extensive inflammatory cell infiltration,frequent hemorrhage,and prominent necrotic cells.In contrast,the SGB group displayed only mild inflammatory infiltration with preserved cellular morphology and minimal hemorrhagic or necrotic changes.The ex-pression level of α7nAChR protein in SGB group was significantly higher than that in S group and AP group.Conclusion:SGB can re-duce the inflammatory response of acute peritonitis rats,and its mechanism may be related to the cholinergic anti-inflammatory path-way mediated by α7nAChR.

Objective:To screen out the disinfection procedure and disinfectant suitable for the actual production of specific pathogen free(SPF)chicken embryo eggs,so as to ensure the disinfection effect of specific pathogen free(SPF)chicken embryo eggs in vaccine production.Methods:This study compares the microbial counting methods of soaking,swabbing with cotton swabs and pouring after thin-film filtration for SPF chicken embryo eggs in a GMP production workshop,and selects the most suitable method for SPF chicken embryo egg microbial counting.Experi-mental groups A,B,and C use self-prepared concentrations of 1∶50 sporicidal agent dilution solution,1∶128 alka-line phenol salt dilution solution,and ready-to-use compound quaternary ammonium disinfectant(sterile),respec-tively,and follow the actual disinfection procedures in the workshop to disinfect and sample the surfaces of SPF chicken embryo eggs entering different cleanliness grades,while using sterile water instead of disinfectant as the control group.The average bactericidal rate is calculated by recording the number of colonies and monitoring the viability of chicken embryo cells using microbial culture,and the disinfection effect of the three disinfectants on SPF chicken embryo eggs is evaluated.Results:The comparison of the results from the three methods shows that the method of sampling SPF chicken embryo eggs by immersion and then counting the microbial colonies through membrane filtration is superior to the other two methods.The final cleaning rate of the control group,which used sterilized injection water to clean the SPF chicken embryo eggs,was 91.67％to 96.97％,while the final steriliza-tion rate of the experimental group,which used the above three disinfectants to disinfect the SPF chicken embryo eggs,was 100.00％.By comparing the cell counts of the experimental group and the control group,it was found that the live cell density of the control group was(6.03-6.25)× 105 cells·mL-1,and that of the experimental groups A-C was(6.08-6.17)× 105 cells·mL-1,(5.99-6.25)× 105 cells·mL-1,and(5.87-6.21)× 105 cells·mL-1 respectively;the cell viability of the control group was 90.33％to 91.35％,and that of the experi-mental groups A-C was 88.25％to 92.12％,89.45％to 93.59％,and 88.02％to 92.89％respectively.Through statistical analysis,it was found that the P values of all experimental groups compared with the control group were greater than 0.05,indicating no statistically significant difference.Conclusion:By comparing the dis-infection effects,cell density and cell viability of the three disinfectants and comprehensively considering factors such as cost and risk of the three disinfectants,1∶50 sporicide dilution,1∶128 alkaline phenolate dilution and ready-to-use compound quaternary ammonium salt disinfectant(sterile)can all be used for the daily surface disin-fection of SPF chicken embryo eggs in the production workshop.The selection of an appropriate disinfectant should be based on specific application scenarios and requirements.

Objective:To investigate the changes of upper airway and adenoids in children with hypertrophic adenoid skeletal classⅠ and class Ⅲ anterior crossbite after orthodontic treatment.Methods:From January 2021 to January 2022,155 children with skeletal class Ⅲ anterior crossbite who were treated with anterior traction in Stomatological Hospital,Shanxi Medical University were selected.They were divided into class Ⅲ normal group(72 cases)and class Ⅲ hypertrophic group(83 cases)according to whether the adenoids were hypertrophic.A total of 122 children with class Ⅰ anterior counterocclusion were treated with"2×4"treatment,which were di-vided into Class Ⅰ normal group(60 cases)and class Ⅰ hypertrophy group(62 cases).The changes of upper airway and adenoid were compared between the two groups.Results:(1)After intervention,only the width of nasopharynx cavity increased(P＜0.05)in Class Ⅰ normal group and Class Ⅰ hypertrophic group,and there was no significant difference in other indicators(P＞0.05).(2)After intervention,the adenoid thickness and A/N ratio of children with skeletal class Ⅲ anterior crossbite decreased,and the width of na-sopharynx cavity,nasopharynx airway space,soft palate upper and rear airway space,uvula tip rear airway space,the minimum air-way space between soft palate and adenoid,and mandibular plane angle increased(P＜0.05).The A/N ratio of class Ⅲ hypertrophic group was lower than that of class Ⅲ normal group(P＜0.05).Conclusion:Orthodontic treatment can reduce the degree of adenoid hypertrophy and expand the airway in children with skeletal class Ⅲ anterior crossbite.Only the width of the nasopharynx cavity can be widened after the correction intervention for children with adenoid hypertrophy and skeletal class Ⅰ anterior crossbite.

Objective:To observe the effect of stellate ganglion block(SGB)on the inflammatory response in rats with acute peritonitis,and to explore whether the possible anti-inflammatory mechanism related to the activation of α7nAChR receptor-mediated cholinergic anti-inflammatory pathway.Methods:A total of 36 SD rats were randomly divided into three groups,with 12 rats in each group:sham operation group(S group),acute peritonitis group(AP group)and SGB treatment group(SGB group).2%acetic acid(1 ml/100 g)was intraperitoneally injected to prepare acute peritonitis rat model in AP group and SGB group,and corresponding dose of normal saline was injected into S group.Right cervical sympathetic nerve was separated but not ligated in AP group and S group,the right cervical sympathetic nerve was severed and ligated in SGB group.Abdominal aorta blood samples were collected 24 h after opera-tion,and serum levels of IL-1β,IL-6 and TNF-α were measured by ELISA,pathological changes of peritoneal tissue were observed by light microscope and expression of α7nAChR in peritoneal tissue was measured by Western blot.Results:Compared with S group,se-rum levels of IL-1β,IL-6 and TNF-α in AP and SGB groups were significantly increased(P<0.05).Serum levels of IL-1β,IL-6,TNF-α in SGB group were significantly lower than those in AP group(P<0.05).HE staining of peritoneal tissues in each group revealed that the S group maintained intact peritoneal structure with normal cellular arrangement,while the AP group exhibited disorganized archi-tecture with extensive inflammatory cell infiltration,frequent hemorrhage,and prominent necrotic cells.In contrast,the SGB group displayed only mild inflammatory infiltration with preserved cellular morphology and minimal hemorrhagic or necrotic changes.The ex-pression level of α7nAChR protein in SGB group was significantly higher than that in S group and AP group.Conclusion:SGB can re-duce the inflammatory response of acute peritonitis rats,and its mechanism may be related to the cholinergic anti-inflammatory path-way mediated by α7nAChR.

Objective:To screen out the disinfection procedure and disinfectant suitable for the actual production of specific pathogen free(SPF)chicken embryo eggs,so as to ensure the disinfection effect of specific pathogen free(SPF)chicken embryo eggs in vaccine production.Methods:This study compares the microbial counting methods of soaking,swabbing with cotton swabs and pouring after thin-film filtration for SPF chicken embryo eggs in a GMP production workshop,and selects the most suitable method for SPF chicken embryo egg microbial counting.Experi-mental groups A,B,and C use self-prepared concentrations of 1∶50 sporicidal agent dilution solution,1∶128 alka-line phenol salt dilution solution,and ready-to-use compound quaternary ammonium disinfectant(sterile),respec-tively,and follow the actual disinfection procedures in the workshop to disinfect and sample the surfaces of SPF chicken embryo eggs entering different cleanliness grades,while using sterile water instead of disinfectant as the control group.The average bactericidal rate is calculated by recording the number of colonies and monitoring the viability of chicken embryo cells using microbial culture,and the disinfection effect of the three disinfectants on SPF chicken embryo eggs is evaluated.Results:The comparison of the results from the three methods shows that the method of sampling SPF chicken embryo eggs by immersion and then counting the microbial colonies through membrane filtration is superior to the other two methods.The final cleaning rate of the control group,which used sterilized injection water to clean the SPF chicken embryo eggs,was 91.67％to 96.97％,while the final steriliza-tion rate of the experimental group,which used the above three disinfectants to disinfect the SPF chicken embryo eggs,was 100.00％.By comparing the cell counts of the experimental group and the control group,it was found that the live cell density of the control group was(6.03-6.25)× 105 cells·mL-1,and that of the experimental groups A-C was(6.08-6.17)× 105 cells·mL-1,(5.99-6.25)× 105 cells·mL-1,and(5.87-6.21)× 105 cells·mL-1 respectively;the cell viability of the control group was 90.33％to 91.35％,and that of the experi-mental groups A-C was 88.25％to 92.12％,89.45％to 93.59％,and 88.02％to 92.89％respectively.Through statistical analysis,it was found that the P values of all experimental groups compared with the control group were greater than 0.05,indicating no statistically significant difference.Conclusion:By comparing the dis-infection effects,cell density and cell viability of the three disinfectants and comprehensively considering factors such as cost and risk of the three disinfectants,1∶50 sporicide dilution,1∶128 alkaline phenolate dilution and ready-to-use compound quaternary ammonium salt disinfectant(sterile)can all be used for the daily surface disin-fection of SPF chicken embryo eggs in the production workshop.The selection of an appropriate disinfectant should be based on specific application scenarios and requirements.

Objective:To investigate the changes of upper airway and adenoids in children with hypertrophic adenoid skeletal classⅠ and class Ⅲ anterior crossbite after orthodontic treatment.Methods:From January 2021 to January 2022,155 children with skeletal class Ⅲ anterior crossbite who were treated with anterior traction in Stomatological Hospital,Shanxi Medical University were selected.They were divided into class Ⅲ normal group(72 cases)and class Ⅲ hypertrophic group(83 cases)according to whether the adenoids were hypertrophic.A total of 122 children with class Ⅰ anterior counterocclusion were treated with"2×4"treatment,which were di-vided into Class Ⅰ normal group(60 cases)and class Ⅰ hypertrophy group(62 cases).The changes of upper airway and adenoid were compared between the two groups.Results:(1)After intervention,only the width of nasopharynx cavity increased(P＜0.05)in Class Ⅰ normal group and Class Ⅰ hypertrophic group,and there was no significant difference in other indicators(P＞0.05).(2)After intervention,the adenoid thickness and A/N ratio of children with skeletal class Ⅲ anterior crossbite decreased,and the width of na-sopharynx cavity,nasopharynx airway space,soft palate upper and rear airway space,uvula tip rear airway space,the minimum air-way space between soft palate and adenoid,and mandibular plane angle increased(P＜0.05).The A/N ratio of class Ⅲ hypertrophic group was lower than that of class Ⅲ normal group(P＜0.05).Conclusion:Orthodontic treatment can reduce the degree of adenoid hypertrophy and expand the airway in children with skeletal class Ⅲ anterior crossbite.Only the width of the nasopharynx cavity can be widened after the correction intervention for children with adenoid hypertrophy and skeletal class Ⅰ anterior crossbite.

Oral lichen planus (OLP) is a chronic inflammatory disease of the oral mucosa. The pathogenesis of OLP is still unclear. Immune abnormalities mediated by T cells and related cytokines play a crucial role in the pathogenesis of OLP. In recent years, glycolytic metabolism-related transporters, enzymes and regulators, such as glucose transporter-1 (Glut1), glyceraldehyde 3-phosphate dehydrogenase (GAPDH), lactate dehydrogenase A (LDHA), mammalian target of rapamycin (mTOR) and hypoxia inducible factor-1α (HIF-1a), have attracted an increasing amount of attention in OLP by regulating the proliferation and differentiation of T cells and the secretion of inflammatory factors. It has been shown that 2-deoxy-D-glucose (2-DG) or rapamycin (RAPA) inhibits the glycolytic metabolism of T cells and then inhibits OLP. This article reviews the research progress of glycolytic metabolism-related transporters, enzymes and regulatory factors in OLP in recent years.

The dental operative microscope has been widely employed in the field of dentistry, particularly in endodontics and operative dentistry, resulting in significant advancements in the effectiveness of root canal therapy, endodontic surgery, and dental restoration. However, the improper use of this microscope continues to be common in clinical settings, primarily due to operators' insufficient understanding and proficiency in both the features and established operating procedures of this equipment. In October 2019, Professor Jingping Liang, Vice Chairman of the Society of Cariology and Endodontology, Chinese Stomatological Association, organized a consensus meeting with Chinese experts in endodontics and operative dentistry. The objective of this meeting was to establish a standard operation procedure for the dental operative microscope. Subsequently, a consensus was reached and officially issued. Over the span of about four years, the content of this consensus has been further developed and improved through practical experience.
Humans ; Dentistry, Operative ; Consensus ; Endodontics ; Root Canal Therapy ; Dental Care