OBJECTIVES: The objective of this study is to measuring the morphology and position of bilateral temporomandibular joints in patients with unilateral and bilateral molar scissor bite and simulating the deformation of the mandible during occlusion, in order to provide thesis for the diagnosis of temporomandibular joint disease in patients with unilateral and bilateral molar scissor bite. METHODS: This study was a retrospective study. A total of 10 patients with unilateral molar scissor bite (the unilateral molar scissor bite group) and 10 patients with bilateral molar scissor bite (the bilateral molar scissor bite group) were selected as the experimental group, and 20 adult patients with classⅠ of angle classification of similar ages were selected as the control group. All patients underwent cone beam computed tomography scans, by measuring the width of the fossa, height of the fossa, articular eminence inclination, long axis of the condyle, minor axis of the condyle, horizontal angle of the condyle and the space of the temporomandibular joint, compare temporomandibular joint morphology and position. The three-dimensional finite element analysis of the mandible morphology was carried out to evaluate the force and deformation of the mandible by using software to simulate the occlusion of the patients. It was further explored the relationship between the force of the mandible morphology and the possible temporomandibular joint disorder symptoms of the patients. RESULTS: Intergroup comparisons for the unilateral molar scissor bite group and left sides of the other groups revealed that the superior articular space in the group with unilateral molar scissor bite was shorter than that in the control group (P<0.05); the long axis of the condyle in the unilateral and bilateral molar scissor bite group were both shorter than that of the control group (P<0.05); among which the unilateral group was larger than the bilateral group, and the minor axis of the condyle in bilateral molar scissor bite group was smaller than in the control group (P<0.05), and the unilateral and bilateral condylar groups were larger than the control group (P<0.05); and the condylar horizontal angle in the unilateral and bilateral groups were larger than that in the control group (P<0.05). The normal sides of the unilateral molar scissor bite group and right sides of the other groups had smaller superior articular space than the control group (P<0.05); and the condylar long-axis in bilateral group was smaller than the control group (P<0.05); and the normal side of the condylar short-axis unilateral group was larger than that of the bilateral condylar group. Three-dimensional finite element analysis: the condyle of patients with molar scissor bite was a concentrated area of deformation during the bite of the mandible, when the first molar occlusion of the scissors bite side was simulated, the maximum deformation was located in the condyle in the X-axis and Z-axis directions. The amount of deformation was greater than that of the scissor bite side in the X-axis direction, while in the Z-axis direction, the normal side was greater than the scissor bite side. The maximum sites of local deformation in the X-axis direction were located in anterior and posterior the transverse crest of scissor bite side, and the minimum sites of local deformation was at 1/3 of the anterior slope of the inner pole of the normal side, the maximum local deformation sites in the Z-axis direction were located in the outer pole and below the outer pole of the normal side. The X-axis deformation value was the largest in the molars occlusion on the normal side, the Y-axis deformation value was in the premolars occlusion on the normal side, and the Z-axis deformation value was the largest in the centric occlusion, the deformation value of the condyle was not most significant in molar scissor bite. CONCLUSIONS Unilateral and bilateral molar scissor bite resulting in a short condyle morphology, and the bilateral group had a shorter condylar morphology than the unilateral group. The condyle of the patient with molar scissor bite is a concentrated area of poor occlusal deformation, and the largest sites of deformation are distributed near the transverse ridge of the inner and outer poles of the condyle. Different occlusion conditions have an effect on condylar deformation values, but do not indicate whether there is a clear association between them.
Humans ; Finite Element Analysis ; Retrospective Studies ; Temporomandibular Joint/pathology* ; Cone-Beam Computed Tomography ; Mandible/pathology* ; Imaging, Three-Dimensional ; Adult ; Temporomandibular Joint Disorders/diagnostic imaging* ; Mandibular Condyle/diagnostic imaging* ; Female ; Male ; Molar

Psoriasis is an incurable chronic inflammatory disease that requires new interventions. Here, we found that fibroblasts exacerbate psoriasis progression by promoting macrophage recruitment via CCL2 secretion by single-cell multi-omics analysis. The natural small molecule celastrol was screened to interfere with the secretion of CCL2 by fibroblasts and improve the psoriasis-like symptoms in both murine and cynomolgus monkey models. Mechanistically, celastrol directly bound to the low-density lipoprotein receptor-related protein 1 (LRP1) β-chain and abolished its binding to the transcription factor c-Jun in the nucleus, which in turn inhibited CCL2 production by skin fibroblasts, blocked fibroblast-macrophage crosstalk, and ameliorated psoriasis progression. Notably, fibroblast-specific LRP1 knockout mice exhibited a significant reduction in psoriasis like inflammation. Taken together, from clinical samples and combined with various mouse models, we revealed the pathogenesis of psoriasis from the perspective of fibroblast-macrophage crosstalk, and provided a foundation for LRP1 as a novel potential target for psoriasis treatment.

The proposition of New Qualitative Productive Forces provides significant theoretical guidance for the development of China's healthcare sector.The Marxist concept of development serves as a foundational theoretical framework for empowering high-quality advancement in healthcare through these new productive forces.The Communist Party of China has consistently upheld Marxism as the guiding ideology for national governance.Based on the Marxist concept of development to analyze the new quality of productive forces,this is an important theoretical innovation of the Communist Party of China,which has important guiding significance for the development of China's health undertakings.

Objective To analyze the characteristics of the crown-root ratios of the anterior teeth in subjects with different periodontal phenotypes in healthy population.Methods A total of 100 periodontally healthy young volunteers were selected,there were 53 females and 47 males,totaling 594 anterior teeth were included in the study.The periodontal probe method was used to determine the periodontal phenotypes of different tooth positions,with 108 cases of thick gingival type and 90 cases of thin gingival type in mesial incisors;95 teeth of thick gingival type and 103 teeth of thin gingival type in lateral incisors,and 98 teeth of thick gingival type and 100 teeth of thin gingival type in cuspids.Panoramic radiographs were taken,crown length and root length of upper anterior teeth were calculated,and crown-root ratio was calculated,to compare and analyze the differences between the results of the two groups.Results The crown-to-root ratio in thin gingival group of mesial incisors and lateral incisors were higher than those in thick gingival group,and the root length was smaller than thick gingival group.The difference was statistically significant(P＜0.05).The keratinized gingival width of thin gingival group was less than that of thick gingival group,and the difference was statistically significant(P＜0.05).Conclusion The relatively high crown-to-root ratio of mesial incisors and lateral incisors in patients with thin gingival phenotypes and the lesser width of keratinized gingiva in thin gingival phenotypes than thick gingival phenotypes.and risk assessment should be taken into account in the restorative system as well as in the orthodontic design of the anterior tooth movement.

The proposition of New Qualitative Productive Forces provides significant theoretical guidance for the development of China's healthcare sector.The Marxist concept of development serves as a foundational theoretical framework for empowering high-quality advancement in healthcare through these new productive forces.The Communist Party of China has consistently upheld Marxism as the guiding ideology for national governance.Based on the Marxist concept of development to analyze the new quality of productive forces,this is an important theoretical innovation of the Communist Party of China,which has important guiding significance for the development of China's health undertakings.

Objective To analyze the characteristics,causes,influencing factors of compensation,and appraisal features of second-instance medical malpractice cases involving cardiovascular diseases in Henan Province from 2017 to 2022,and to provide reference for forensic appraisal and judicial trial.Methods Cases were retrieved from China Judgments Online between 2017 and 2022.A total of 1,957 documents were reviewed,including 1,397 medical malpractice cases and 130 cardiovascular disease cases.Results The total compensation awarded in these second-instance cases was 27.04 million yuan,with a median of 158,600 yuan.Cases involving patient death accounted for 80.00％(104/130).Among 107 cases with first-instance appraisals,55.14％(59/107)raised objections,while 74.62％(97/130)of the second-instance trials upheld the original judgment.The most common degree of responsibility borne by medical institutions was secondary responsibility(41.54％,54/130).The top three medical faults were:inadequate observation and management of patient conditions(46.15％),omission of auxiliary examinations(37.50％),and insufficient notification(36.54％).In terms of violations-including medical record documentation,inappropriate treatment,misdiagnosis or missed diagnosis,out-of-scope practice,and improper medication use-the actual proportions in judgments(24/113,34/113,12/113,7/113,14/113)were all significantly lower than the patients' claims(all P＜0.05).Conclusion Cardiovascular medical malpractice cases in second-instance trials involve substantial compensation and a high proportion of death outcomes.Both medical institutions and patients should pay greater attention to first-instance trials.Appraisal organizations should proactively provide explanation and education regarding issues likely to raise patient doubts,thereby reducing unnecessary appeals.They should also avoid hasty revisions of appraisal opinions when faced with objections and instead focus on improving the quality and credibility of appraisals.In determining medical faults,emphasis should be placed on evaluating whether there was inadequate patient monitoring and management,omission of auxiliary examinations,and insufficient notification.

Objective To analyze the characteristics,causes,influencing factors of compensation,and appraisal features of second-instance medical malpractice cases involving cardiovascular diseases in Henan Province from 2017 to 2022,and to provide reference for forensic appraisal and judicial trial.Methods Cases were retrieved from China Judgments Online between 2017 and 2022.A total of 1,957 documents were reviewed,including 1,397 medical malpractice cases and 130 cardiovascular disease cases.Results The total compensation awarded in these second-instance cases was 27.04 million yuan,with a median of 158,600 yuan.Cases involving patient death accounted for 80.00％(104/130).Among 107 cases with first-instance appraisals,55.14％(59/107)raised objections,while 74.62％(97/130)of the second-instance trials upheld the original judgment.The most common degree of responsibility borne by medical institutions was secondary responsibility(41.54％,54/130).The top three medical faults were:inadequate observation and management of patient conditions(46.15％),omission of auxiliary examinations(37.50％),and insufficient notification(36.54％).In terms of violations-including medical record documentation,inappropriate treatment,misdiagnosis or missed diagnosis,out-of-scope practice,and improper medication use-the actual proportions in judgments(24/113,34/113,12/113,7/113,14/113)were all significantly lower than the patients' claims(all P＜0.05).Conclusion Cardiovascular medical malpractice cases in second-instance trials involve substantial compensation and a high proportion of death outcomes.Both medical institutions and patients should pay greater attention to first-instance trials.Appraisal organizations should proactively provide explanation and education regarding issues likely to raise patient doubts,thereby reducing unnecessary appeals.They should also avoid hasty revisions of appraisal opinions when faced with objections and instead focus on improving the quality and credibility of appraisals.In determining medical faults,emphasis should be placed on evaluating whether there was inadequate patient monitoring and management,omission of auxiliary examinations,and insufficient notification.

Objective To analyze the characteristics of the crown-root ratios of the anterior teeth in subjects with different periodontal phenotypes in healthy population.Methods A total of 100 periodontally healthy young volunteers were selected,there were 53 females and 47 males,totaling 594 anterior teeth were included in the study.The periodontal probe method was used to determine the periodontal phenotypes of different tooth positions,with 108 cases of thick gingival type and 90 cases of thin gingival type in mesial incisors;95 teeth of thick gingival type and 103 teeth of thin gingival type in lateral incisors,and 98 teeth of thick gingival type and 100 teeth of thin gingival type in cuspids.Panoramic radiographs were taken,crown length and root length of upper anterior teeth were calculated,and crown-root ratio was calculated,to compare and analyze the differences between the results of the two groups.Results The crown-to-root ratio in thin gingival group of mesial incisors and lateral incisors were higher than those in thick gingival group,and the root length was smaller than thick gingival group.The difference was statistically significant(P＜0.05).The keratinized gingival width of thin gingival group was less than that of thick gingival group,and the difference was statistically significant(P＜0.05).Conclusion The relatively high crown-to-root ratio of mesial incisors and lateral incisors in patients with thin gingival phenotypes and the lesser width of keratinized gingiva in thin gingival phenotypes than thick gingival phenotypes.and risk assessment should be taken into account in the restorative system as well as in the orthodontic design of the anterior tooth movement.

Patients with skeletal ClassⅡ often show symptoms such as protrusion of maxillary anterior teeth,mandibular retraction,open lips and teeth,deep overbite,and deep overjet,which seriously affect the facial appearance.This article reports a case of an ado-lescent male patient with skeletal Class Ⅱ combined with impacted teeth treated by one-stage early correction and two-stage fixation.After treatment,the patient's skeletal Class Ⅱ symptoms improved significantly,including the improvement of mandibular retraction.The problem of open lips and teeth was solved;the facial appearance tended to be straight,and there was no obvious abnormality of the temporomandibular joint.This case shows that early correction can achieve good therapeutic effects on this kind of patients and can avoid or reduce the possibility of orthognathic surgery for these patients in adulthood.

IL-34 can promote osteoclast differentiation and activation, which may contribute to steroidinduced osteonecrosis of the femoral head (ONFH). Animal model was constructed in both BALB/c and IL-34 deficient mice to detect the relative expression of inflammation cytokines. Micro-CT was utilized to reveal the internal structure. In vitro differentiated osteoclast was induced by culturing bone marrow-derived macrophages with IL-34 conditioned medium or M-CSF. The relative expression of pro-inflammation cytokines, osteoclast marker genes, and relevant pathways molecules was detected with quantitative real-time RT-PCR, ELISA, and Western blot. Up-regulated IL-34 expression could be detected in the serum of ONFH patients and femoral heads of ONFH mice. IL-34 deficient mice showed the resistance to ONFH induction with the up-regulated trabecular number, trabecular thickness, bone value fraction, and down-regulated trabecular separation. On the other hand, inflammatory cytokines, such as TNF-α, IFN-γ, IL-6, IL-12, IL-2, and IL-17A, showed diminished expression in IL-34 deficient ONFH induced mice. IL-34 alone or works in coordination with M-CSF to promote osteoclastogenesis and activate ERK, STAT3, and non-canonical NF-κB pathways. These data demonstrate that IL-34 can promote the differentiation of osteoclast through ERK, STAT3, and non-canonical NF-κB pathways to aggravate steroid-induced ONFH, and IL-34 can be considered as a treatment target.