1.A Meta-Analysis on the Efficacy and Safety of Xihuang Pill/Capsule( 西黄丸/胶囊) as an Adjuvant to Radio⁃therapy and Chemotherapy in the Treatment of Malignant Digestive Tract Tumors
Mengyi LI ; Lei ZHANG ; Lijun WANG ; Xing GAO
Journal of Traditional Chinese Medicine 2025;66(9):912-919
ObjectiveTo evaluate the efficacy and safety of Xihuang Pill/Capsule (西黄丸/胶囊, XP/XC) as an adjuvant to radiotherapy and/or chemotherapy in the treatment of malignant digestive tract tumors. MethodsA systematic search was conducted in the China Biomedical Literature Database, China National Knowledge Infrastructure (CNKI), Wanfang Data Knowledge Service Platform, VIP Database, PubMed, Web of Science, Embase, and Cochrane Library for randomized controlled trials (RCTs) published before March 6, 2024, regarding the use of XP/XC in clinical adjuvant treatment of malignant digestive tract tumors. The methodological quality of the included studies was assessed using the risk of bias assessment tool. RevMan 5.4 was used to perform a Meta-analysis on 1-year survival rate, 2-year survival rate, clinical efficacy, including objective response rate and disease control rate, Karnofsky Performance Status (KPS) score, immune markers (CD3+, CD4+, CD8+, and CD4+/CD8+ ratio), and adverse event rates (incidence of gastrointestinal reactions and bone marrow suppression). ResultsThirteen RCTs involving 962 patients were included, with 527 patients in the experimental group and 435 patients in the control group. Meta-analysis results showed that the experimental group had better outcomes than the control group in terms of 2-year survival rate [RR = 0.49, 95% CI (0.31, 0.78)], objective response rate [RR = 0.68, 95% CI (0.60, 0.77)], disease control rate [RR = 0.85, 95% CI (0.80, 0.91)], and immune markers CD3+ [MD = -7.99, 95% CI (-9.12, -6.86)], CD4+ [MD = -5.42, 95% CI (-7.11, -3.74)], and CD4+/CD8+ ratio [MD = -0.26, 95% CI (-0.32, -0.20)] (P<0.05). However, no statistically significant differences were found between the experimental and control groups in terms of 1-year survival rate [RR = 0.91, 95% CI (0.73, 1.14)], KPS [MD = -3.73, 95% CI (-8.67, 1.21)], CD8+ [MD = -0.53, 95% CI (-1.45, 0.39)], incidence of gastrointestinal reactions [RR = 0.82, 95% CI (0.46, 1.46)], and incidence of bone marrow suppression [RR = 0.93, 95% CI (0.72, 1.20)] (P>0.05). ConclusionCompared with radiotherapy/chemotherapy alone, the combination of XP/XC with radiotherapy/chemotherapy can effectively improve clinical efficacy and 2-year survival rate, enhance immune function, and achieve similar adverse event rates as radiotherapy/chemotherapy alone in patients with malignant digestive tract tumors.
2.Visual analysis of treatment of adolescent idiopathic scoliosis
Xiaodong ZHENG ; Shan GAO ; Wenjin HAN ; Lijun LIU ; Menglong JIA ; Longtan YU
Chinese Journal of Tissue Engineering Research 2025;29(3):645-653
BACKGROUND:At present,the incidence of scoliosis is increasing year by year,especially in adolescent idiopathic scoliosis.Therefore,it is more and more important to strengthen the research on the treatment of adolescent scoliosis. OBJECTIVE:To summarize the current status,hotspots,emerging trends,and frontiers of global research on the treatment of adolescent idiopathic scoliosis to provide reference and guidance for future related research. METHODS:The literature related to the treatment of adolescent idiopathic scoliosis was retrieved on the Web of Science Core Collection(WOSCC)database from 2013 to 2023.CiteSpace 6.2.R1 software was used for visual analysis of countries,institutions,authors,and keywords. RESULTS AND CONCLUSION:(1)A total of 561 English articles were included in this study.Among countries,institutions,and authors,the United States has contributed the most.Nanjing University and Qiu,Yong(Affiliated Drum Tower Hospital,Nanjing University School of Medicine)are the most published institution and author.The academic journal with the largest number of articles is the European Spine Journal.(2)In the analysis of cited literature,the top 10 most cited articles mainly describe the effects of surgical treatment and conservative treatment on improving adolescent idiopathic scoliosis,especially improving the curvature of patients.(3)Through the summary of highly cited articles and the keyword clustering,keyword prominence in-depth mining,the research hotspots are currently the relationship between Cobb angle and treatment choice,the therapeutic effect of exercise therapy and the therapeutic effect of posterior vertebral fusion.(4)The prognosis of patients with different curvatures has not been studied in depth,and the etiology of adolescent idiopathic scoliosis has not been clarified,so the relationship between curvature and prognosis and the etiology of adolescent idiopathic scoliosis may be a new research trend in the future.
3.Effects of electroacupuncture on cognitive impairment and mitophagy mediated by KIF5A/Miro1 pathway in Parkinson's disease mice.
Mengzhu LI ; Jiafan CHEN ; Mengxuan CHEN ; Haiyan LI ; Zhenyi ZHANG ; Da GAO ; Weicong ZENG ; Lijun ZHAO ; Meiling ZHU
Chinese Acupuncture & Moxibustion 2025;45(8):1111-1119
OBJECTIVE:
To explore the improvement effect of electroacupuncture (EA) based on Xingnao Kaiqiao acupuncture (acupuncture for regaining consciousness and opening orifices) on cognitive impairment in mice with Parkinson's disease (PD), and to explore its regulatory mechanisms on the kinesin family member 5A (KIF5A)/mitochondrial Rho GTPase 1 (Miro1) pathway and mitophagy in prefrontal cortical neurons.
METHODS:
A total of 70 male C57BL/6J mice of clean grade were randomly divided into a normal group (12 mice), a sham operation group (12 mice), and a model pre-screening group (46 mice). Unilateral stereotaxic injection of 6-hydroxydopamine (6-OHDA) into the medial forebrain bundle was adopted to establish the PD model in the model pre-screening group. Twenty-four mice after successful modeling were randomly selected and divided into a model group and an EA group, 12 mice in each one. In the EA group, acupuncture was applied at "Shuigou" (GV26) and bilateral "Sanyinjiao" (SP6) and "Neiguan" (PC6), ipsilateral "Sanyinjiao" (SP6) and "Neiguan" (PC6) were connected to EA respectively, with disperse-dense wave, 5 Hz/20 Hz in frequency, 0.5 mA in current intensity, 20 min a time, 6 times a week for 30 days. Cognitive function was assessed by Y-maze and Morris water maze tests; morphology of prefrontal cortex was observed by H.E. staining; reactive oxygen species (ROS) level in prefrontal cortex was detected by fluorescence probe method; mitochondrial morphology and autophagosome ultrastructure were observed by transmission electron microscopy; the mRNA expression of tyrosine hydroxylase (TH) was detected by quantitative real-time PCR; the protein expression of TH, KIF5A, Miro1, p62, Parkin and PTEN induced kinase 1 (PINK1) was detected by Western blot.
RESULTS:
Compared with the sham operation group, both the model group and the EA group exhibited increased rotation number of per minute (P<0.001). Compared with the sham operation group, in the model group, the novel arm exploration time of Y-maze test was shortened (P<0.001), the escape latency of Morris water maze test was prolonged (P<0.05) and the platform crossing number of Morris water maze test was reduced (P<0.01); in the prefrontal cortex, the number of cellular vacuole and neurons with karyopyknosis was increased (P<0.001), and mitochondrial autophagosomes could be observed; in the prefrontal cortex, the relative expression of ROS was increased (P<0.001), the protein and mRNA expression of TH was decreased (P<0.001), the protein expression of Miro1, PINK1, Parkin was increased (P<0.001, P<0.01), the protein expression of KIF5A and p62 was decreased (P<0.001). Compared with the model group, in the EA group, the novel arm exploration time of Y-maze test was prolonged (P<0.01), the escape latency of Morris water maze test was shortened (P<0.05) and the platform crossing number of Morris water maze test was increased (P<0.05); in the prefrontal cortex, the number of cellular vacuole and neurons with karyopyknosis was decreased (P<0.001), and the number of mitochondrial autophagosomes reduced and the mitochondrial morphology was improved; in the prefrontal cortex, the relative expression of ROS was decreased (P<0.01), the protein and mRNA expression of TH was increased (P<0.001, P<0.01), the protein expression of Miro1, PINK1, Parkin was decreased (P<0.001, P<0.01, P<0.05), the protein expression of KIF5A and p62 was increased (P<0.01, P<0.05).
CONCLUSION
Xingnao Kaiqiao electroacupuncture effectively alleviates cognitive impairment and damage of neuronal function in PD mice, its mechanism may be related to the regulation of KIF5A/Miro1 pathway, hence reducing the mitophagy in prefrontal cortical neurons.
Animals
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Electroacupuncture
;
Male
;
Mice
;
Parkinson Disease/physiopathology*
;
Cognitive Dysfunction/psychology*
;
Kinesins/genetics*
;
Humans
;
Mitophagy
;
Mice, Inbred C57BL
;
rho GTP-Binding Proteins/genetics*
;
Mitochondria/genetics*
;
Prefrontal Cortex/metabolism*
4.Effectiveness of arthroscopic release assisted with medial small incision in treatment of non-traumatic elbow stiffness.
Lijun LÜ ; Yanyan CHANG ; Baojun ZHOU ; Qiuming GAO ; Jieliang HU ; Liyuan CHEN ; Kongxing WEI ; Fujun GAO ; Wentao LI ; Xin YUAN ; Yibin JIN
Chinese Journal of Reparative and Reconstructive Surgery 2025;39(5):563-568
OBJECTIVE:
To explore the effectiveness of arthroscopic release of elbow joint assisted by medial small incision ulnar nerve release in the treatment of non-traumatic elbow stiffness.
METHODS:
The clinical data of 15 patients with non-traumatic elbow stiffness treated with arthroscopic release of elbow joint assisted by medial small incision ulnar nerve release between April 2019 and September 2023 were retrospectively analyzed. There were 6 males and 9 females with an average age of 46 years ranging from 34 to 56 years. The causes included rheumatoid arthritis in 3 cases, gouty arthritis in 2 cases, loose bodies in 3 cases, and elbow osteoarthritis in 7 cases. There were 4 cases with ulnar neuritis and 3 cases with synovial osteochondromatosis. The duration of elbow stiffness ranged from 6 to 18 months, with an average of 10 months. The operation time and intraoperative blood loss were recorded. The effectiveness was evaluated by visual analogue scale (VAS) score, range of elbow motion (maximum flexion, maximum extension, and total flexion and extension), Mayo score, and Hospital for Special Surgery (HSS) elbow score.
RESULTS:
The operation time was 60-90 minutes, with an average of 65 minutes, and the intraoperative blood loss was 40-100 mL, with an average of 62 mL. All patients were followed up 13-18 months, with an average of 14 months. There was no complication such as vascular and nerve injury, poor wound healing, collateral ligament injury, elbow joint space narrowing, osteophyte proliferation, or loose body formation around the joint. At last follow-up, the elbow range of motion (maximum flexion, maximum extension, and total flexion and extension), VAS score, and Mayo score significantly improved when compared with those before operation ( P<0.05). The HSS elbow score was 85-95, with an average of 92; 12 cases were excellent, 3 cases were good, and the excellent and good rate was 100%.
CONCLUSION
Arthroscopic release of elbow joint assisted by medial small incision ulnar nerve release is an effective way to treat non-traumatic elbow stiffness, which has the advantages of small trauma, short operation time, and good effectiveness. It can carry out early elbow rehabilitation training and significantly improve elbow function.
Humans
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Male
;
Female
;
Arthroscopy/methods*
;
Adult
;
Middle Aged
;
Elbow Joint/physiopathology*
;
Retrospective Studies
;
Range of Motion, Articular
;
Treatment Outcome
;
Ulnar Nerve/surgery*
;
Operative Time
5.Targeting farnesoid X receptor as aging intervention therapy.
Lijun ZHANG ; Jing YU ; Xiaoyan GAO ; Yingxuan YAN ; Xinyi WANG ; Hang SHI ; Minglv FANG ; Ying LIU ; Young-Bum KIM ; Huanhu ZHU ; Xiaojun WU ; Cheng HUANG ; Shengjie FAN
Acta Pharmaceutica Sinica B 2025;15(3):1359-1382
Environmental toxicants have been linked to aging and age-related diseases. The emerging evidence has shown that the enhancement of detoxification gene expression is a common transcriptome marker of long-lived mice, Drosophila melanogaster, and Caenorhabditis elegans. Meanwhile, the resistance to toxicants was increased in long-lived animals. Here, we show that farnesoid X receptor (FXR) agonist obeticholic acid (OCA), a marketed drug for the treatment of cholestasis, may extend the lifespan and healthspan both in C. elegans and chemical-induced early senescent mice. Furthermore, OCA increased the resistance of worms to toxicants and activated the expression of detoxification genes in both mice and C. elegans. The longevity effects of OCA were attenuated in Fxr -/- mice and Fxr homologous nhr-8 and daf-12 mutant C. elegans. In addition, metabolome analysis revealed that OCA increased the endogenous agonist levels of the pregnane X receptor (PXR), a major nuclear receptor for detoxification regulation, in the liver of mice. Together, our findings suggest that OCA has the potential to lengthen lifespan and healthspan by activating nuclear receptor-mediated detoxification functions, thus, targeting FXR may offer to promote longevity.
6.Cryo-EM structures of Nipah virus polymerase complex reveal highly varied interactions between L and P proteins among paramyxoviruses.
Lu XUE ; Tiancai CHANG ; Jiacheng GUI ; Zimu LI ; Heyu ZHAO ; Binqian ZOU ; Junnan LU ; Mei LI ; Xin WEN ; Shenghua GAO ; Peng ZHAN ; Lijun RONG ; Liqiang FENG ; Peng GONG ; Jun HE ; Xinwen CHEN ; Xiaoli XIONG
Protein & Cell 2025;16(8):705-723
Nipah virus (NiV) and related viruses form a distinct henipavirus genus within the Paramyxoviridae family. NiV continues to spillover into the humans causing deadly outbreaks with increasing human-bat interaction. NiV encodes the large protein (L) and phosphoprotein (P) to form the viral RNA polymerase machinery. Their sequences show limited homologies to those of non-henipavirus paramyxoviruses. We report two cryo-electron microscopy (cryo-EM) structures of the Nipah virus (NiV) polymerase L-P complex, expressed and purified in either its full-length or truncated form. The structures resolve the RNA-dependent RNA polymerase (RdRp) and polyribonucleotidyl transferase (PRNTase) domains of the L protein, as well as a tetrameric P protein bundle bound to the L-RdRp domain. L-protein C-terminal regions are unresolved, indicating flexibility. Two PRNTase domain zinc-binding sites, conserved in most Mononegavirales, are confirmed essential for NiV polymerase activity. The structures further reveal anchoring of the P protein bundle and P protein X domain (XD) linkers on L, via an interaction pattern distinct among Paramyxoviridae. These interactions facilitate binding of a P protein XD linker in the nucleotide entry channel and distinct positioning of other XD linkers. We show that the disruption of the L-P interactions reduces NiV polymerase activity. The reported structures should facilitate rational antiviral-drug discovery and provide a guide for the functional study of NiV polymerase.
Nipah Virus/chemistry*
;
Cryoelectron Microscopy
;
Viral Proteins/genetics*
;
RNA-Dependent RNA Polymerase/genetics*
;
Phosphoproteins/genetics*
;
Humans
;
Models, Molecular
;
Protein Binding
7.Acute effects of air pollution on pulmonary function and exhaled nitric oxide in children in Shanghai
Jianhui GAO ; Yuhong WANG ; Yichen DING ; Lisha SHI ; Dong XU ; Limin LING ; Li PENG ; Lijun ZHANG
Shanghai Journal of Preventive Medicine 2024;36(3):241-248
ObjectiveTo investigate the acute effects of compound air pollution on children’s respiratory function. MethodsUsing panel group study design, 223 students in five classes of grade 4 from two primary schools (a, b) in Xuhui and Hongkou districts of Shanghai were randomly selected to measure pulmonary function and exhaled nitric oxide (FeNO). The first three tests were carried out from May to June in 2020, and the fourth test was carried out from September to December in 2021. At the same time, the daily and hourly mean values of PM2.5, PM10, SO2, NO2, O3 and CO was collected from the nearby air quality monitoring points of the two schools during the same period , as well as meteorological monitoring data (temperature, humidity, wind speed and atmospheric pressure). The linear mixed effect model was used to analyze the effects of air pollution on pulmonary function and respiratory inflammation in the summer. ResultsThe results of single pollutant model showed that PM2.5, PM10, SO2 and NO2 were positively correlated with FeNO, and the effect was reflected in lag0, lag1 and lag3 (P<0.05). PM2.5, PM10 and NO2 were negatively correlated with the changes of lung function FEF25%, FEF50%, FEF75%, FeF25%-75%, PEF, FVC, FEV1 and FEV1/FVC, and the effect was reflected in lag0 to lag3 days (P<0.05). The results of the dual pollutant model showed that the concentration changes of SO2 and NO2 were significantly correlated with the decrease of FEV1 when combined with O3 or PM2.5 (P<0.01), and the concentration changes of PM2.5 was significantly correlated with the increase of FeNO when O3, SO2 and NO2 were combined respectively (P<0.01). The effects of the dual pollutant model were greater than the effect of PM2.5 single pollutant model. ConclusionThe health effects of different air pollutants on children’s respiratory tract function indexes in summer are different. The combined effects of two pollutants on the lung function of children increased to different degrees. Although air pollution is light in summer, it still has an impact on children’s respiratory tract function index and inflammation index, and the combined effect of dual pollutants is more significant than that of single pollutant.
8.The mediating role of family support between type D personality and intolerance of uncertainty in first-stroke patients
Xiaoping YANG ; Huijuan WANG ; Xiaohui LIU ; Haihua GAO ; Jialin YUAN ; Miaomiao CHEN ; Lijun WANG
Chinese Journal of Practical Nursing 2024;40(7):548-555
Objective:To analyze the status quo of type D personality, intolerance of uncertainty and family support in first-episode stroke patients, and to explore the mediating role of family support between type D personality and intolerance of uncertainty in first-episode stroke patients, in order to provide reference for formulating relevant clinical intervention measures to promote the physical and mental health of first-episode stroke patients.Methods:This study was a cross-sectional investigation. A total of 300 patients with acute first-episode stroke who met the inclusion and exclusion criteria in the Department of Neurology of the General Hospital of Ningxia Medical University and the First People′s Hospital of Yinchuan from May 2023 to September 2023 were selected as the study objects by convenience sampling method. The general data questionnaire, Type D personality Scale-14, Family Caring Index Scale and the Intolerance of Uncertainty Scale were used to investigate them. Pearson correlation analysis was used to test the correlation between variables, and SPSS plug-in PROCESS 3.5 was used to test the mediation effect.Results:Finally, 300 questionnaires were effectively collected, including 228 males and 72 females. Patients aged ≥ 60 years old were the majority, accounting for 49.3% (148/300). The detection rate of type D personality in the first stroke patients was 37.3% (112/300), and the total score of Type D personality inventory, family support and intolerance of uncertainty of type D personality in the first stroke patients were (22.16 ± 9.95), (6.40 ± 2.23), (27.82 ± 7.93) points. The correlation analysis results showed that the intolerance of uncertainty of type D personality in the first stroke patients was positively correlated with type D personality scores ( r=0.675, P<0.001). There was a negative correlation with family support score ( r=-0.644, P<0.001). The results of mediating effect analysis showed that family support played a partial mediating role in the relationship between type D personality and intolerability of uncertainty in first-stroke patients, and the mediating effect accounted for 34.94% of the total effect. Conclusions:The mediating role of family support between type D personality and intolerability of uncertainty in first-stroke patients is established. In the future, the level of family support of patients can be continuously improved to reduce their intolerability of uncertainty, so as to promote the physical and mental health of patients and improve their quality of life.
9.A retrospective analysis of the assessment results of external quality control of fluoride testing laboratories in national endemic disease prevention and control institutions
Xiaohong JI ; Wei WANG ; Lijun ZHAO ; Lin GAO ; Liaowei WU ; Cheng LI ; Jian WANG ; Junrui PEI ; Yanhui GAO
Chinese Journal of Endemiology 2024;43(2):141-147
Objective:To analyze the external quality control assessment results of fluoride testing laboratories in endemic disease prevention and control institutions nationwide from 2006 to 2023, investigate the quality control capabilities of these laboratories in various provinces, prefectures, cities, and counties nationwide, and ensure the accuracy and reliability of surveillance data on endemic fluorosis nationwide.Methods:Using retrospective analysis, the external quality control assessment results of all participating fluoride testing laboratories of national endemic disease prevention and control institutions from 2006 to 2023 were summarized and analyzed. The assessment results from 2006 to 2008 were tested for outliers using Grubbs method, homogeneity of variance using Cochran method, excluding the assessment data of unqualified laboratories, calculating the total mean and total standard deviation, Z-score method was used to test the assessment of laboratories, and statistical analysis and judgment were done when the result of │Z│ < 3. The assessment results from 2009 - 2023 were obtained from all laboratories. In 2010, two tests were conducted in the first and second half of the year, and the Z-ratio scores of each laboratory were calculated using robust statistics. When │Z│≤2, the assessment was qualified; when 2 < │Z│ < 3, the assessment was basically qualified; when│Z│≥3, the assessment was unqualified, and the consensus value came from all participating laboratories in the assessment.Results:From the beginning of quality control operation in 2006 to 2023, the number of laboratories participated in external quality control assessments had significantly increased. The number of laboratories participated in water fluoride assessment increased from 30 in 2006 to 1 277 in 2023, and the number of laboratories participated in urine fluoride assessment increased from 29 to 497. The number of laboratories participated in the brick tea fluorine assessment had increased from 43 in 2014 to 193 in 2023. The assessment results showed that when │Z│ < 3, the total qualified rate of fluoride external quality control in fluoride testing laboratories of national endemic disease control institutions was 95.2%, with the lowest being 87.1% (27/31) in 2008 and the highest being 100.0% (394/394) in 2014. When │Z│≤2, the total feedback pass rate was 88.4%, with the lowest being 79.3% (288/363) in the first half of 2010 and the highest being 99.5% (392/394) in 2014. The assessment results showed that when │Z│ < 3, the total pass rate of urine fluoride external quality control in fluoride testing laboratories of national endemic disease control institutions was 98.0%, with the lowest being 86.2% (25/29) in 2006 and 2007, respectively, and the highest being 100.0% (68/68) in 2014. When │Z│≤2, the total qualification rate was 93.7%, with the lowest being 86.5% (64/74) in the second half of 2010 and the highest being 100.0% (68/68) in 2014. The assessment results showed that when│Z│ < 3, the total pass rate of extra-fluoride quality control of brick tea in fluoride testing laboratories of national endemic disease control institutions was 95.4%, with the lowest being 85.0% (164/193) in 2023, and the highest being 100.0% (43/43, 51/51, 79/79) in 2014, 2015 and 2016, respectively. When │Z│≤2, the total pass rate was 89.2%, with the lowest being 72.7% (32/44) in 2017 and the highest being 100.0% (43/43) in 2014. From 2009 to 2023, there were a total of 21 provincial-level laboratories that passed the water fluoride detection assessment, including 3 provinces where all prefecture level and county-level laboratories were qualified. The assessment results of urinary fluorine showed that there were 11 qualified provincial-level laboratories and 1 prefecture-level laboratory. From 2014 to 2023, the assessment results of brick-tea fluorine showed that there were 5 provincial-level laboratories that passed the tea fluorine testing assessment and no prefecture-level laboratory.Conclusions:Conclusion: From 2006 to 2023, the number of fluoride testing laboratories participating in external quality control assessment has increased year by year, and most provincial, municipal and county-level laboratories have good fluoride testing capabilities, which can meet the testing needs of endemic disease prevention and monitoring. For some laboratories with problems, targeted rectification should be carried out to improve the quality of detection, in order to provide better technical support for the monitoring of endemic fluorosis areas.
10.Diagnostic value of 3D reconstruction of CBCT and nine zone method of alveolar bone for ambush teeth of anterior maxilla
Hongxia GAO ; Peng XU ; Rongchen XU ; Lijun WANG
China Medical Equipment 2024;21(3):58-62
Objective:To explore the diagnostic value of three-dimensional(3D)reconstruction of cone beam computed tomography(CBCT)and nine zone method of alveolar bone for ambush teeth of anterior maxilla.Methods:From January 2022 to January 2023,a total of 80 patients with ambush teeth of anterior maxilla were selected from the Stomatology Department of the Third Medical Center of Chinese PLA General Hospital.All patients sought medical attention due to uneven or missing dental alignment.A total of 88 ambush teeth of anterior maxilla were treated.After alveolar bone was conducted by nine zone method,the ambush teeth were found by nine zone method combined with temporomandibular bone CBCT.The number of ambush teeth of anterior maxilla at the outer-upper,outer-middle,outer-lower,middle-upper,middle-middle,middle-lower,inner-upper,inner-middle and inner-lower at the second tooth root of dental crown,as well as the position of the ambush teeth,dental crown positioning and root curvature,were counted by using statistical method.The diagnostic accuracies of two examination methods for the position of ambush teeth,dental crown positioning and root curvature were compared.The comparison of the rates between the nine zone method of alveolar bone and the research results of CBCT was analyzed by using chi square test and other methods.Results:In the 88 ambush teeth,the dental crowns and roots of 50 teeth were at the same side of adjacent teeth,and these of 5 teeth were at between adjacent teeth,and these of 33 teeth were at the different side of adjacent teeth.The most of dental crowns and roots of ambush teeth located in two regions,which were respectively inner-middle and outer-upper regions(23.86%and 19.32%)of maxilla.The diagnostic results of 88 ambush teeth were consistent with the results of intraoperative findings,with a diagnostic accuracy of 100%.The accuracies of the nine zone classification method of alveolar bone in the positions of ambush teeth and dental crown were significantly higher than those of CBCT,and the differences were statistically significant(x2=4.020,1.340,4.460,4.570,0.900,0.930,0.030,0.040,0.200,P<0.05),respectively.Conclusion:CBCT has the advantages of clearness,intuitiveness,accuracy and convenience in the localization of ambush teeth of the anterior maxilla.The nine zone method of alveolar bone has a significance of precise localization for the treatment of complex ambush teeth in the anterior maxilla,and also has a certain guidance value of diagnosis and treatment.

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