1.Finite element analysis of anterior maxillary segmental distraction osteogenesis using asymmetric distractors in patients with unilateral cleft lip and palate
Zehua JIN ; Ruomei LI ; Jiajun SHI ; Yuehua ZHANG ; Zhenqi CHEN
The Korean Journal of Orthodontics 2025;55(2):142-153
Objective:
The treatment of asymmetric maxillary hypoplasia and dental crowding secondary to unilateral cleft lip and palate (UCLP) is often challenging.This study introduced an asymmetric tooth-borne distractor in anterior maxillary segmental distraction osteogenesis and used three-dimensional finite element analysis to evaluate its potential for clinical application in cases of asymmetrical maxillary hypoplasia.
Methods:
A cone-beam computed tomography scan of a late adolescent with UCLP was used to construct a three-dimensional finite element model of the teeth and maxillary structures. An asymmetric distractor model was used to simulate conventional distraction osteogenesis and asymmetric distraction osteogenesis (ADO) to evaluate the resultant stress distribution and displacement.
Results:
Postoperatively, both distraction methods resulted in anterior maxillary segment advancement with a slight upward movement. ADO yielded a greater increase in the dental arch length on the cleft side and induced rotation of the anterior maxillary segment, potentially improving midline deviation. Both methods showed similar stress distributions, with higher stress concentrations on the cleft side.
Conclusions
ADO may offer clinical advantages in correcting asymmetrical maxillary hypoplasia in patients with UCLP by facilitating asymmetrical expansion and rotation of the maxilla. Further research is needed to generalize these findings to other clinical presentations.
2.Finite element analysis of anterior maxillary segmental distraction osteogenesis using asymmetric distractors in patients with unilateral cleft lip and palate
Zehua JIN ; Ruomei LI ; Jiajun SHI ; Yuehua ZHANG ; Zhenqi CHEN
The Korean Journal of Orthodontics 2025;55(2):142-153
Objective:
The treatment of asymmetric maxillary hypoplasia and dental crowding secondary to unilateral cleft lip and palate (UCLP) is often challenging.This study introduced an asymmetric tooth-borne distractor in anterior maxillary segmental distraction osteogenesis and used three-dimensional finite element analysis to evaluate its potential for clinical application in cases of asymmetrical maxillary hypoplasia.
Methods:
A cone-beam computed tomography scan of a late adolescent with UCLP was used to construct a three-dimensional finite element model of the teeth and maxillary structures. An asymmetric distractor model was used to simulate conventional distraction osteogenesis and asymmetric distraction osteogenesis (ADO) to evaluate the resultant stress distribution and displacement.
Results:
Postoperatively, both distraction methods resulted in anterior maxillary segment advancement with a slight upward movement. ADO yielded a greater increase in the dental arch length on the cleft side and induced rotation of the anterior maxillary segment, potentially improving midline deviation. Both methods showed similar stress distributions, with higher stress concentrations on the cleft side.
Conclusions
ADO may offer clinical advantages in correcting asymmetrical maxillary hypoplasia in patients with UCLP by facilitating asymmetrical expansion and rotation of the maxilla. Further research is needed to generalize these findings to other clinical presentations.
3.Finite element analysis of anterior maxillary segmental distraction osteogenesis using asymmetric distractors in patients with unilateral cleft lip and palate
Zehua JIN ; Ruomei LI ; Jiajun SHI ; Yuehua ZHANG ; Zhenqi CHEN
The Korean Journal of Orthodontics 2025;55(2):142-153
Objective:
The treatment of asymmetric maxillary hypoplasia and dental crowding secondary to unilateral cleft lip and palate (UCLP) is often challenging.This study introduced an asymmetric tooth-borne distractor in anterior maxillary segmental distraction osteogenesis and used three-dimensional finite element analysis to evaluate its potential for clinical application in cases of asymmetrical maxillary hypoplasia.
Methods:
A cone-beam computed tomography scan of a late adolescent with UCLP was used to construct a three-dimensional finite element model of the teeth and maxillary structures. An asymmetric distractor model was used to simulate conventional distraction osteogenesis and asymmetric distraction osteogenesis (ADO) to evaluate the resultant stress distribution and displacement.
Results:
Postoperatively, both distraction methods resulted in anterior maxillary segment advancement with a slight upward movement. ADO yielded a greater increase in the dental arch length on the cleft side and induced rotation of the anterior maxillary segment, potentially improving midline deviation. Both methods showed similar stress distributions, with higher stress concentrations on the cleft side.
Conclusions
ADO may offer clinical advantages in correcting asymmetrical maxillary hypoplasia in patients with UCLP by facilitating asymmetrical expansion and rotation of the maxilla. Further research is needed to generalize these findings to other clinical presentations.
4.Finite element analysis of anterior maxillary segmental distraction osteogenesis using asymmetric distractors in patients with unilateral cleft lip and palate
Zehua JIN ; Ruomei LI ; Jiajun SHI ; Yuehua ZHANG ; Zhenqi CHEN
The Korean Journal of Orthodontics 2025;55(2):142-153
Objective:
The treatment of asymmetric maxillary hypoplasia and dental crowding secondary to unilateral cleft lip and palate (UCLP) is often challenging.This study introduced an asymmetric tooth-borne distractor in anterior maxillary segmental distraction osteogenesis and used three-dimensional finite element analysis to evaluate its potential for clinical application in cases of asymmetrical maxillary hypoplasia.
Methods:
A cone-beam computed tomography scan of a late adolescent with UCLP was used to construct a three-dimensional finite element model of the teeth and maxillary structures. An asymmetric distractor model was used to simulate conventional distraction osteogenesis and asymmetric distraction osteogenesis (ADO) to evaluate the resultant stress distribution and displacement.
Results:
Postoperatively, both distraction methods resulted in anterior maxillary segment advancement with a slight upward movement. ADO yielded a greater increase in the dental arch length on the cleft side and induced rotation of the anterior maxillary segment, potentially improving midline deviation. Both methods showed similar stress distributions, with higher stress concentrations on the cleft side.
Conclusions
ADO may offer clinical advantages in correcting asymmetrical maxillary hypoplasia in patients with UCLP by facilitating asymmetrical expansion and rotation of the maxilla. Further research is needed to generalize these findings to other clinical presentations.
5.Finite element analysis of anterior maxillary segmental distraction osteogenesis using asymmetric distractors in patients with unilateral cleft lip and palate
Zehua JIN ; Ruomei LI ; Jiajun SHI ; Yuehua ZHANG ; Zhenqi CHEN
The Korean Journal of Orthodontics 2025;55(2):142-153
Objective:
The treatment of asymmetric maxillary hypoplasia and dental crowding secondary to unilateral cleft lip and palate (UCLP) is often challenging.This study introduced an asymmetric tooth-borne distractor in anterior maxillary segmental distraction osteogenesis and used three-dimensional finite element analysis to evaluate its potential for clinical application in cases of asymmetrical maxillary hypoplasia.
Methods:
A cone-beam computed tomography scan of a late adolescent with UCLP was used to construct a three-dimensional finite element model of the teeth and maxillary structures. An asymmetric distractor model was used to simulate conventional distraction osteogenesis and asymmetric distraction osteogenesis (ADO) to evaluate the resultant stress distribution and displacement.
Results:
Postoperatively, both distraction methods resulted in anterior maxillary segment advancement with a slight upward movement. ADO yielded a greater increase in the dental arch length on the cleft side and induced rotation of the anterior maxillary segment, potentially improving midline deviation. Both methods showed similar stress distributions, with higher stress concentrations on the cleft side.
Conclusions
ADO may offer clinical advantages in correcting asymmetrical maxillary hypoplasia in patients with UCLP by facilitating asymmetrical expansion and rotation of the maxilla. Further research is needed to generalize these findings to other clinical presentations.
6.Salvianolic Acid F Regulates Bax/Caspase-3/GSDME Signaling Pathway to Inhibit Pyroptosis of HK-2 Cells
Xiancong SHI ; Zhishen XIE ; Liang ZHAO ; Jiajun WANG ; Yafei DUAN ; Pan WANG ; Zhenqiang ZHANG ; Xiaowei ZHANG ; Jiangyan XU
Chinese Journal of Experimental Traditional Medical Formulae 2024;30(9):56-64
ObjectiveTo investigate the mechanism of salvianolic acid F (Sal F) in repairing the high glucose-induced injury in human kidney-2 (HK-2) cells via the B-cell lymphoma-2 (Bcl-2)-associated X protein (Bax)/cysteinyl aspartate-specific proteinase 3 (Caspase-3)/gasdermin-E (GSDME) pathway. MethodThe cell counting kit-8 (CCK-8) was used to measure the relative viability of HK-2 cells exposed to high glucose and different concentrations (2.5, 5, 10, 20 μmol·L-1) of Sal F and the relative viability of HK-2 cells treated with Sal F for different time periods. The levels of lactate dehydrogenase (LDH) and interleukin-1β (IL-1β) in the supernatant of the cell culture were measured by the LDH assay kit and enzyme-linked immunosorbent assay (ELISA) kit, respectively. Flow cytometry combined with Annexin V-FITC/propidium iodide (PI) and Hoechst 33342/PI staining was employed to reveal the proportion of PI-positive HK-2 cells exposed to high glucose. Western blotting was employed to determine the protein levels of Bax, Bcl-2, cytochrome C, cysteinyl aspartate-specific proteinase (Caspase)-9, Caspase-3, and GSDME in the HK-2 cells exposed to high glucose and treated with Sal F. The 2,7-dichlorodihydrofluorescein diacetate fluorescence probe (DCFH-DA) and mitochondrial membrane potential assay kit (JC-1) were used to determine the production of reactive oxygen species (ROS) and the mitochondrial membrane potential in the HK-2 cells exposed to high glucose and treated with Sal F. ResultCompared with the blank group, the model group showed decreased cell viability (P<0.01), elevated levels LDH and IL-1β, increased proportion of PI-positive cells (P<0.01), up-regulated protein levels of Bax, cytochrome C, Caspase-9, Caspase-3, and GSDME (P<0.01), down-regulated protein level of Bcl-2 (P<0.01), decreased mitochondrial membrane potential, and excessive ROS accumulation. Compared with the model group, Sal F repaired the high glucose-induced injury in HK-2 cells (P<0.05), lowered the levels of LDH and IL-1β (P<0.05, P<0.01), and decreased the proportion of PI-positive cells (P<0.01). In addition, Sal F down-regulated the protein levels of Bax, cytochrome C, Caspase-9, Caspase-3, and GSDME and up-regulated the protein level of Bcl-2 (P<0.05, P<0.01), increased the mitochondrial membrane potential, and decreased the accumulation of ROS in HK-2 cells. ConclusionSal F can reduce the production of ROS, restore the balance of mitochondrial membrane potential, and inhibit pyroptosis via the Bax/Caspase-3/GSDME signaling pathway to repair the high glucose-induced injury in HK-2 cells.
7.Clinical application progress of immunization and targeted therapy for Hepatocellular Carcinoma in special populations
Fazhu FEI ; Jiajun LU ; Shuai ZHANG ; Hao LI ; Bin REN
The Journal of Practical Medicine 2024;40(6):738-742
Hepatocellular carcinoma(HCC)has become the second leading cause of cancer-related death worldwide,ranking 6th among all tumors.Due to the lack of obvious early symptoms,most patients are diagnosed in the advanced stage,and the clinical benefits of surgical resection and hepatic artery chemoembolization and radiofrequency ablation are very limited.In recent years,the advent of immune-targeted therapies has revolutionized the systemic and systemic treatment of patients with advanced HCC,however,there is a lack of strong clinical evidence on the safety and efficacy of immune and targeted therapies for special populations,including patients with human immunodeficiency virus(HIV)infection,active autoimmune disease,decompensated cirrhosis(Child B or C),patients with diabetes-associated metabolic syndrome,patients with portal hypertension,vascular invasion,or portal vein thrombosis(PVT),and patients with liver transplantation(LT).This article reviews the current research progress of immune and targeted drugs in special populations.
8.Recent advance in role of synaptosomal-associated protein-25 in neurodegenerative diseases
Jing XU ; Xiaojun ZHANG ; Jiajun CHEN
Chinese Journal of Neuromedicine 2024;23(3):284-290
Synaptic dysfunction is one of the important pathophysiological mechanisms of neurodegeneration in neurodegenerative diseases, and detection of synaptic protein biomarkers is of great value in determining disease progression and clinically monitoring the efficacy of disease-modifying drugs. Synaptosome-associated protein-25 is a presynaptic plasma membrane protein that can reliably reflect synaptic damage in neurodegenerative diseases, and may be the most promising biomarker to evaluate synaptic function. This review focuses on the basic characteristics and functions of synaptosome-related protein-25 and its research progress in neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease and Lewy body dementias, in order to identify pathological changes and early diagnosis of high-risk patients early at preclinical stage, and seek opportunities for disease monitoring and new therapeutic targets.
9.Efficacy of modified electroconvulsive therapy combined with medication in inpatient schizophrenia patients and urban-rural differences
Hongcheng XIE ; Shuangshuang FENG ; Tingting WANG ; Junfan LIANG ; Jiajun REN ; Hongli ZHANG ; Ziyuan LIN ; Siru WANG ; Bo XIANG ; Kezhi LIU
Sichuan Mental Health 2024;37(6):497-501
BackgroundCombination of antipsychotic drugs and modified electroconvulsive therapy (MECT) is currently a commonly used method for treating schizophrenia, but its efficacy varies among different patient groups. ObjectiveTo explore the therapeutic effects of MECT on schizophrenia patients living in different urban versus rural environments, so as to provide references for the selection of treatment plans based on patients' residence. MethodsA total of 587 patients hospitalized at Luzhou Mental Health Center, Zigong Mental Health Center and Yibin Fourth People's Hospital from May 2018 to August 2022, who met the diagnostic criteria for schizophrenia in the Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5) ,were included in the study. Patients were divided into two groups: medication-only group (n=106) and MECT combined with medication group (n=481). In MECT combined with medication group, 24 rural patients residing in urban areas were excluded, leaving the remaining patients divided into urban group (n=103) and rural group (n=354) based on their place of residence. Positive and Negative Syndrome Scale (PANSS) was used to assess the severity of symptoms. Clinical efficacy was evaluated using PANSS score reduction rate, and covariance analysis was used to compare the therapeutic effects of different patients. ResultsThe differences of reduction rate of PANSS total score, positive symptom scale score and negative symptom scale score as well as treatment effectiveness rate between MECT combined with medication group and medication-only group were statistically significant (F=11.149, 12.111, 31.725, χ2=14.010, P<0.01). Statistically significant differences were also observed in reduction rate of PANSS total score and positive symptom subscale score as well as treatment effectiveness rate between urban and rural patients in MECT combined with medication group (F=3.946, 4.523, χ2=4.033, P<0.05). ConclusionThe efficacy of MECT combined with medication may be superior to medication alone in the treatment of schizophrenia, and the combined therapy may be more effective in urban patients than that in rural patients, with potentially more pronounced improvements in positive symptoms.
10.Behavioral Economics Perspectives on Communication Strategies for Vaccination Decision-Making Facilitation
Yuwei ZHANG ; Yuzhuo XIE ; Yazhou WANG ; Jiajun SHI ; Jingzhi WANG ; Jiaqi GUO ; Baijun TENG ; Mingli JIAO
Chinese Health Economics 2024;43(8):66-69
In recent years,public hesitancy to vaccinate has come to the fore and can hinder the advancement of immunization programs.It is important to increase public confidence in vaccines and to rationally and effectively promote the immunization behavior of the population.Based on behavioral economics theory,it combines the anchoring effect,loss aversion,two-systems theory,and the herd effect to explore the irrational factors and decision-making preferences behind the public's vaccination decisions,and then proposes discourse strategies for effective boosting to increase the public's confidence in vaccination.

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