1.Inhibitory effects of different concentrations of auranofin on M1 macrophage function and its therapeutic potential in diabetic wound healing
Hongfei PAN ; Zhenbing ZHUANG ; Baiyun XU ; Zhangyang YANG ; Kairui LIN ; Bingqing ZHAN ; Jinghan LAN ; Heng GAO ; Nanbo ZHANG ; Jiayu LIN
Chinese Journal of Tissue Engineering Research 2026;30(6):1390-1397
BACKGROUND:During diabetic wound healing,the sustained activation of M1 macrophages exacerbates the inflammatory response and hinders wound repair.Auranofin,an anti-inflammatory drug,has not been clearly studied for its effects on M1 macrophages and its potential role in diabetic wound healing.OBJECTIVE:To investigate the effects of different concentrations of auranofin on the biological function of M1 macrophages and evaluate its potential application in diabetic wound healing.METHODS:RAW264.7 and THP-1 cells were used as research models.M1 polarization was induced using different concentrations of interferon-γ and lipopolysaccharide.M1 macrophages were treated with 1 and 2 μmol/L auranofin.Cell counting kit-8 assay was used to evaluate the effect of auranofin on cell viability.Quantitative real-time PCR was performed to detect mRNA expression of interleukin-1β,interleukin-6,and tumor necrosis factor-α.ELISA was employed to measure the levels of interleukin-1β,interleukin-6,and tumor necrosis factor-α in the supernatant.Western blot analysis was used to assess the expression of nuclear factor-κB(p65),phosphorylated mitogen-activated protein kinases(MAPK),and total MAPK proteins.Additionally,6-8-week-old male C57BL/6J and db/db diabetic mice were used for wound healing experiments,with the mice divided into C57 control,db/db control and auranofin treatment groups,each containing six animals.Dorsal skin defect modeling and treatment with intraperitoneal injection of auranofin were performed to observe wound healing in mice.RESULTS AND CONCLUSION:(1)Cell experiments showed that co-treatment with interferon-y(10 ng/mL)and lipopolysaccharide(100 ng/mL)significantly induced M1 polarization in RAW264.7 and THP-1 cells,resulting in increased mRNA expression of interleukin-1β,interleukin-6,and tumor necrosis factor-α.Treatment with auranofin(1 and 2 μmol/L)reduced the mRNA expression of these inflammatory factors in the cells and inhibited the secretion of inflammatory factors in the cell supernatant.(2)Auranofin treatment significantly suppressed the activation of nuclear factor-κB(p65)and phosphorylated MAPK signaling pathways.(3)Animal experiments showed that auranofin promoted wound healing in db/db diabetic mice,suggesting that auranofin has strong anti-inflammatory effects and may facilitate the healing of wounds in diabetic mice.
2.Inhibitory effects of different concentrations of auranofin on M1 macrophage function and its therapeutic potential in diabetic wound healing
Hongfei PAN ; Zhenbing ZHUANG ; Baiyun XU ; Zhangyang YANG ; Kairui LIN ; Bingqing ZHAN ; Jinghan LAN ; Heng GAO ; Nanbo ZHANG ; Jiayu LIN
Chinese Journal of Tissue Engineering Research 2026;30(6):1390-1397
BACKGROUND:During diabetic wound healing,the sustained activation of M1 macrophages exacerbates the inflammatory response and hinders wound repair.Auranofin,an anti-inflammatory drug,has not been clearly studied for its effects on M1 macrophages and its potential role in diabetic wound healing.OBJECTIVE:To investigate the effects of different concentrations of auranofin on the biological function of M1 macrophages and evaluate its potential application in diabetic wound healing.METHODS:RAW264.7 and THP-1 cells were used as research models.M1 polarization was induced using different concentrations of interferon-γ and lipopolysaccharide.M1 macrophages were treated with 1 and 2 μmol/L auranofin.Cell counting kit-8 assay was used to evaluate the effect of auranofin on cell viability.Quantitative real-time PCR was performed to detect mRNA expression of interleukin-1β,interleukin-6,and tumor necrosis factor-α.ELISA was employed to measure the levels of interleukin-1β,interleukin-6,and tumor necrosis factor-α in the supernatant.Western blot analysis was used to assess the expression of nuclear factor-κB(p65),phosphorylated mitogen-activated protein kinases(MAPK),and total MAPK proteins.Additionally,6-8-week-old male C57BL/6J and db/db diabetic mice were used for wound healing experiments,with the mice divided into C57 control,db/db control and auranofin treatment groups,each containing six animals.Dorsal skin defect modeling and treatment with intraperitoneal injection of auranofin were performed to observe wound healing in mice.RESULTS AND CONCLUSION:(1)Cell experiments showed that co-treatment with interferon-y(10 ng/mL)and lipopolysaccharide(100 ng/mL)significantly induced M1 polarization in RAW264.7 and THP-1 cells,resulting in increased mRNA expression of interleukin-1β,interleukin-6,and tumor necrosis factor-α.Treatment with auranofin(1 and 2 μmol/L)reduced the mRNA expression of these inflammatory factors in the cells and inhibited the secretion of inflammatory factors in the cell supernatant.(2)Auranofin treatment significantly suppressed the activation of nuclear factor-κB(p65)and phosphorylated MAPK signaling pathways.(3)Animal experiments showed that auranofin promoted wound healing in db/db diabetic mice,suggesting that auranofin has strong anti-inflammatory effects and may facilitate the healing of wounds in diabetic mice.
3.Clinical characteristics and prognostic analysis of newly diagnosed acute myeloid leukemia with critical illness
Peiqi LIANG ; Meng GAO ; Yan XIE ; Bingqing LI ; Qian LI ; Ziyi LIU ; Dong WANG ; Huiying QIU ; Suning CHEN ; Depei WU ; Jianhong FU
Chinese Journal of Hematology 2025;46(1):39-44
Objective:This study retrospectively analyzed the clinical characteristics of patients newly diagnosed with acute myeloid leukemia (AML) who were admitted to the hematology intensive care unit (HCU) with critical illness. It also examined factors associated with critical illness and early mortality in these patients.Methods:Clinical data were collected from 91 newly diagnosed AML patients admitted to the HCU of the Department of Hematology, First Affiliated Hospital of Soochow University, from October 2020 to 2024. Reasons for HCU admission, major therapeutic interventions, and risk factors for critical illness and early mortality were analyzed.Results:The median time from diagnosis to HCU admission was 3 days ( IQR: 3–9 days), and the median HCU stay was 10 days ( IQR: 3–23 days). Of the 91 patients, 71 were admitted to the HCU before induction chemotherapy, while 20 were transferred to the HCU after its initiation. The leading causes of HCU admission were pulmonary infection (78.0% ), respiratory failure (44.0% ), hepatic insufficiency (28.6% ), renal insufficiency (27.5% ), disseminated intravascular coagulation (DIC; 25.3% ), and sepsis (23.1% ). Median Acute Physiology and Chronic Health Evaluation Ⅱ (APACHE Ⅱ) and SOFA scores at HCU admission were 14 ( IQR: 11–18) and the median Sepsis Related Organ Failure Assessment (SOFA) score was 7 ( IQR: 4, 10). Major HCU interventions included vasoactive drugs, noninvasive and invasive mechanical ventilation, continuous renal replacement therapy, therapeutic leukocyte clearance, and cardiopulmonary resuscitation. Among patients receiving induction chemotherapy, the composite complete remission rate was 65.4%, and the overall remission rate was 88.5%. Thirty-five (38.5% ) patients died within 28 days of HCU admission. Independent risk factors for 28-day mortality were DIC ( OR=9.350, 95% CI 1.999–43.745, P=0.005), sepsis ( OR=6.817, 95% CI 1.571–29.582, P=0.010), and cardiac insufficiency ( OR=12.281, 95% CI 2.385–63.254, P=0.003) . Conclusion:The main reason for HCU admission in newly diagnosed critically ill AML patients was pulmonary infection. Nearly 40% of patients experisenced early death, and DIC, sepsis, and heart failure were factors influencing early mortatlity.
4.Clinical efficacy of strengthening the spleen to nourish the lung in treating stable chronic obstructive pulmonary disease with lung and spleen qi deficiency complicated by sarcopenia
Binxian JIANG ; Beiqi XU ; Xiangyu GAO ; Xiaoyu SU ; Bingqing XU ; Hongpeng LI
Chinese Journal of Primary Medicine and Pharmacy 2025;32(9):1292-1297
Objective:To investigate the clinical efficacy of strengthening the spleen to nourish the lung in treating stable chronic obstructive pulmonary disease (COPD) with lung and spleen qi deficiency complicated by sarcopenia. Methods:This study was designed as a prospective study. A total of 65 patients with stable COPD and sarcopenia who received treatment at Kunshan Hospital of Chinese Medicine from January 2021 to December 2021 were included in the study. They were randomly divided into a control group and an observation group using the random number table method. The control group ( n = 34) was treated with conventional therapy, while the observation group ( n = 31) was treated with Shenling Baizhu Powder, a traditional Chinese medication based on the principle of strengthening the spleen to nourish the lung, in addition to the conventional therapy given to the control group. Both groups were treated for 1 month. Traditional Chinese medicine syndrome score, pulmonary function, grip strength, walking speed, albumin and prealbumin levels were compared between the two groups. Results:After treatment, the scores of all traditional Chinese medicine syndromes in the observation group were significantly lower than those in the control group (all P < 0.05). Compared with the control group, the levels of forced expiratory volume in the first second (FEV 1)[(1.51 ± 0.27) L vs. (1.32 ± 0.20) L, t = 3.11, P < 0.001 ] and FEV 1/forced vital capacity (FVC) [(57.20 ± 8.41)% vs. (52.89 ± 5.66)%, t = 2.30, P = 0.025] were significantly higher in the observation group. Compared with before treatment, gait speed [(1.07 ± 0.27) m/s vs. (0.90 ± 0.30) m/s, t = 7.66, P < 0.001], grip strength [(20.62 ± 5.07) kg vs. (19.42 ± 5.78) kg, t = 3.55, P < 0.001], albumin [(231.38 ± 49.40) g/L vs. (200.26 ± 65.87) g/L, t = 3.70, P < 0.001] and prealbumin [(39.53 ± 3.45) g/L vs. (35.81 ± 4.46) g/L, t = 4.08, P < 0.001] levels in the observation group were significantly increased after treatment. There were no significant differences in gait speed, grip strength, albumin, and prealbumin levels in the control group before and after treatment (all P > 0.05). Conclusions:The method of strengthening the spleen to nourish the lung shows good clinical efficacy in treating stable COPD with lung and spleen deficiency complicated by sarcopenia, and it has great potential for broader application.
5.Effects of paravertebral nerve block under thoracoscopic direct vision on postoperative pain,stress response and T lymphocyte subsets in patients undergoing thoracoscopic lobectomy under general anesthesia
Tiemei GAO ; Hantao SHE ; Bingqing WU
Journal of Clinical Surgery 2025;33(3):280-283
Objective To investigate the effects of paravertebral nerve block(PVNB)under thoracoscopic direct vision on postoperative pain,stress response and T lymphocyte subsets in patients undergoing thoracoscopic lobectomy under general anesthesia.Methods A total of 104 patients who were scheduled to undergo thoracoscopic lobectomy in the hospital from January 2021 to August 2023 were enrolled in this study.They were divided into the control group(52 cases)and the observation group(52 cases)using the random number table.The control group was given general anesthesia,and the observation group was given PVNB on the basis of general anesthesia.Both groups received patient-controlled intravenous analgesia(PCIA)after surgery.Visual analogue pain(VAS)scores were recorded 1 hour(T1),6 hours(T2),12 hours(T3),24 hours(T4)and 48 hours(T5)after surgery in both groups.The drug use for PCIA,postoperative stress response,changes in T lymphocyte subsets,and incidence rates of adverse reactions in the two groups were analyzed.Results From T,to T5,VAS scores of the two groups increased firstly and then decreased.From T,to T4,VAS scores of the observation group were lower than those of the control group(P<0.05).The first pressing time of PCIA in the observation group[(11.18±3.29)h]was longer than that in the control group[(9.61±2.48)h].The pressing times of PCIA and dosage of sufentanil[(4.63±1.51)times and(46.29±6.24)ml]were lower than those in the control group[(7.22±1.86)times and(55.41±7.88)ml](P<0.05).At 24 h after surgery,the levels of cortisol,norepinephrine and blood glucose in the observation group[(252.27±19.75)ng/ml,(346.63±25.06)ng/ml and(5.48±0.72)mmol/L]were lower than those in the control group[(275.78±21.46)ng/ml,(381.71±23.71)ng/ml and(6.03±0.64)mmol/L](P<0.05).The levels of CD3+,CD4+,CD8+T lymphocyte count and CD4+/CD8+T lymphocyte count in the observation group[(0.57±0.05)× 109/L,(0.39±0.04)× 109/L,(0.26±0.02)× 109/L and(1.50±0.35)]were higher than those in the control group[(0.55±0.05)× 109/L,(0.36±0.03)× 109/L,(0.29±0.04)× 109/L and(1.24±0.31)](P<0.05).The incidence rates of adverse reactions in the two groups were 1.92%and 2.77%,without statistically significant difference between groups(P>0.05).Conclusion Applying PVTB under thoracoscopic direct vision to patients undergoing thoracoscopic lobectomy under general anesthesia is beneficial for reducing postoperative pain,stress response,and the influence on immune system.
6.Effects of paravertebral nerve block under thoracoscopic direct vision on postoperative pain,stress response and T lymphocyte subsets in patients undergoing thoracoscopic lobectomy under general anesthesia
Tiemei GAO ; Hantao SHE ; Bingqing WU
Journal of Clinical Surgery 2025;33(3):280-283
Objective To investigate the effects of paravertebral nerve block(PVNB)under thoracoscopic direct vision on postoperative pain,stress response and T lymphocyte subsets in patients undergoing thoracoscopic lobectomy under general anesthesia.Methods A total of 104 patients who were scheduled to undergo thoracoscopic lobectomy in the hospital from January 2021 to August 2023 were enrolled in this study.They were divided into the control group(52 cases)and the observation group(52 cases)using the random number table.The control group was given general anesthesia,and the observation group was given PVNB on the basis of general anesthesia.Both groups received patient-controlled intravenous analgesia(PCIA)after surgery.Visual analogue pain(VAS)scores were recorded 1 hour(T1),6 hours(T2),12 hours(T3),24 hours(T4)and 48 hours(T5)after surgery in both groups.The drug use for PCIA,postoperative stress response,changes in T lymphocyte subsets,and incidence rates of adverse reactions in the two groups were analyzed.Results From T,to T5,VAS scores of the two groups increased firstly and then decreased.From T,to T4,VAS scores of the observation group were lower than those of the control group(P<0.05).The first pressing time of PCIA in the observation group[(11.18±3.29)h]was longer than that in the control group[(9.61±2.48)h].The pressing times of PCIA and dosage of sufentanil[(4.63±1.51)times and(46.29±6.24)ml]were lower than those in the control group[(7.22±1.86)times and(55.41±7.88)ml](P<0.05).At 24 h after surgery,the levels of cortisol,norepinephrine and blood glucose in the observation group[(252.27±19.75)ng/ml,(346.63±25.06)ng/ml and(5.48±0.72)mmol/L]were lower than those in the control group[(275.78±21.46)ng/ml,(381.71±23.71)ng/ml and(6.03±0.64)mmol/L](P<0.05).The levels of CD3+,CD4+,CD8+T lymphocyte count and CD4+/CD8+T lymphocyte count in the observation group[(0.57±0.05)× 109/L,(0.39±0.04)× 109/L,(0.26±0.02)× 109/L and(1.50±0.35)]were higher than those in the control group[(0.55±0.05)× 109/L,(0.36±0.03)× 109/L,(0.29±0.04)× 109/L and(1.24±0.31)](P<0.05).The incidence rates of adverse reactions in the two groups were 1.92%and 2.77%,without statistically significant difference between groups(P>0.05).Conclusion Applying PVTB under thoracoscopic direct vision to patients undergoing thoracoscopic lobectomy under general anesthesia is beneficial for reducing postoperative pain,stress response,and the influence on immune system.
7.Clinical efficacy of strengthening the spleen to nourish the lung in treating stable chronic obstructive pulmonary disease with lung and spleen qi deficiency complicated by sarcopenia
Binxian JIANG ; Beiqi XU ; Xiangyu GAO ; Xiaoyu SU ; Bingqing XU ; Hongpeng LI
Chinese Journal of Primary Medicine and Pharmacy 2025;32(9):1292-1297
Objective:To investigate the clinical efficacy of strengthening the spleen to nourish the lung in treating stable chronic obstructive pulmonary disease (COPD) with lung and spleen qi deficiency complicated by sarcopenia. Methods:This study was designed as a prospective study. A total of 65 patients with stable COPD and sarcopenia who received treatment at Kunshan Hospital of Chinese Medicine from January 2021 to December 2021 were included in the study. They were randomly divided into a control group and an observation group using the random number table method. The control group ( n = 34) was treated with conventional therapy, while the observation group ( n = 31) was treated with Shenling Baizhu Powder, a traditional Chinese medication based on the principle of strengthening the spleen to nourish the lung, in addition to the conventional therapy given to the control group. Both groups were treated for 1 month. Traditional Chinese medicine syndrome score, pulmonary function, grip strength, walking speed, albumin and prealbumin levels were compared between the two groups. Results:After treatment, the scores of all traditional Chinese medicine syndromes in the observation group were significantly lower than those in the control group (all P < 0.05). Compared with the control group, the levels of forced expiratory volume in the first second (FEV 1)[(1.51 ± 0.27) L vs. (1.32 ± 0.20) L, t = 3.11, P < 0.001 ] and FEV 1/forced vital capacity (FVC) [(57.20 ± 8.41)% vs. (52.89 ± 5.66)%, t = 2.30, P = 0.025] were significantly higher in the observation group. Compared with before treatment, gait speed [(1.07 ± 0.27) m/s vs. (0.90 ± 0.30) m/s, t = 7.66, P < 0.001], grip strength [(20.62 ± 5.07) kg vs. (19.42 ± 5.78) kg, t = 3.55, P < 0.001], albumin [(231.38 ± 49.40) g/L vs. (200.26 ± 65.87) g/L, t = 3.70, P < 0.001] and prealbumin [(39.53 ± 3.45) g/L vs. (35.81 ± 4.46) g/L, t = 4.08, P < 0.001] levels in the observation group were significantly increased after treatment. There were no significant differences in gait speed, grip strength, albumin, and prealbumin levels in the control group before and after treatment (all P > 0.05). Conclusions:The method of strengthening the spleen to nourish the lung shows good clinical efficacy in treating stable COPD with lung and spleen deficiency complicated by sarcopenia, and it has great potential for broader application.
8.Clinical characteristics and prognostic analysis of newly diagnosed acute myeloid leukemia with critical illness
Peiqi LIANG ; Meng GAO ; Yan XIE ; Bingqing LI ; Qian LI ; Ziyi LIU ; Dong WANG ; Huiying QIU ; Suning CHEN ; Depei WU ; Jianhong FU
Chinese Journal of Hematology 2025;46(1):39-44
Objective:This study retrospectively analyzed the clinical characteristics of patients newly diagnosed with acute myeloid leukemia (AML) who were admitted to the hematology intensive care unit (HCU) with critical illness. It also examined factors associated with critical illness and early mortality in these patients.Methods:Clinical data were collected from 91 newly diagnosed AML patients admitted to the HCU of the Department of Hematology, First Affiliated Hospital of Soochow University, from October 2020 to 2024. Reasons for HCU admission, major therapeutic interventions, and risk factors for critical illness and early mortality were analyzed.Results:The median time from diagnosis to HCU admission was 3 days ( IQR: 3–9 days), and the median HCU stay was 10 days ( IQR: 3–23 days). Of the 91 patients, 71 were admitted to the HCU before induction chemotherapy, while 20 were transferred to the HCU after its initiation. The leading causes of HCU admission were pulmonary infection (78.0% ), respiratory failure (44.0% ), hepatic insufficiency (28.6% ), renal insufficiency (27.5% ), disseminated intravascular coagulation (DIC; 25.3% ), and sepsis (23.1% ). Median Acute Physiology and Chronic Health Evaluation Ⅱ (APACHE Ⅱ) and SOFA scores at HCU admission were 14 ( IQR: 11–18) and the median Sepsis Related Organ Failure Assessment (SOFA) score was 7 ( IQR: 4, 10). Major HCU interventions included vasoactive drugs, noninvasive and invasive mechanical ventilation, continuous renal replacement therapy, therapeutic leukocyte clearance, and cardiopulmonary resuscitation. Among patients receiving induction chemotherapy, the composite complete remission rate was 65.4%, and the overall remission rate was 88.5%. Thirty-five (38.5% ) patients died within 28 days of HCU admission. Independent risk factors for 28-day mortality were DIC ( OR=9.350, 95% CI 1.999–43.745, P=0.005), sepsis ( OR=6.817, 95% CI 1.571–29.582, P=0.010), and cardiac insufficiency ( OR=12.281, 95% CI 2.385–63.254, P=0.003) . Conclusion:The main reason for HCU admission in newly diagnosed critically ill AML patients was pulmonary infection. Nearly 40% of patients experisenced early death, and DIC, sepsis, and heart failure were factors influencing early mortatlity.
9.Effect of different doses of esketamine on early mood in patients with preoperative anxiety after tho-racoscopic surgery
Bingqing WU ; Hantao SHE ; Tiemei GAO ; Chen CHEN
The Journal of Clinical Anesthesiology 2024;40(2):144-149
Objective To observe the effect of different doses of esketamine on early mood in pa-tients with preoperative anxiety after thoracoscopic surgery.Methods Eighty patients with preoperative anx-iety before thoracoscopic surgery,37 males and 43 females,aged 25-64 years,BMI 18-26 kg/m2,ASA physical statusⅠ-Ⅲwere selected.According to random number table,the patients were randomly divided into four groups:control group(group C),esketamine 0.1 mg/kg group(group E1),esketamine 0.2 mg/kg group(group E2),and esketamine 0.3 mg/kg group(group E3),20 patients in each group.In groups E1,E2,and E3,the patients were slowly injected with corresponding doses of esketamine intrave-nously 30 minutes before the end of the operation,and the patients in group C were given 10 ml of normal saline at the same time.The 7-item generalized anxiety disorder scale(GAD-7)score and hospital anxiety and depression scale(HADS)score were evaluated 24 hours before surgery,24,48,72,and 120 hours af-ter surgery,respectively.Peripheral venous blood(5 ml)was collected at the same time points,and serum brain-derived neurotrophic factor(BDNF)concentration was detected by ELISA.NRS scores at rest and ex-ercise were recorded 12 and 24 hours after surgery.The number of remedial analgesia and the number of ef-fective compressions of analgesia pump within 48 hours after surgery were recorded.Results Compared with group C,the scores of GAD-7 and HADS in groups E1,E2,and E3 were significantly decreased 24,48,and 72 hours after surgery(P<0.05).And compared with groups E1 and E2,the scores of GAD-7 and HADS in group E3 were significantly lower(P<0.05).The serum BDNF level in groups E1,E2,and E3 were significantly increased compared with group C 24,48,and 72 hours after surgery(P<0.05).Compared with group E1 and E2,the serum BDNF level in group E3 was significantly higher(P<0.05).Compared with group C,the NRS scores at rest 12 and 24 hours and the scores at exercise 12 hours after surgery in groups E1,E2,and E3 were significantly decreased(P<0.05).And compared with groups E1 and E2,the scores in group E3 were significantly lower(P<0.05).The number of postoperative remedial analgesia and the number of effective compressions of analgesia pump in groups E1,E2,and E3 were signif-icantly decreased compared with group C within 48 hours after surgery(P<0.05).And compared with groups E1 and E2,the number in group E3 was significantly lower(P<0.05).Conclusion Single intra-venous injection of esketamine 0.1,0.2,and 0.3 mg/kg can improve early postoperative mood of patients with anxiety before thoracoscopic surgery,and esketamine 0.3 mg/kg has better anti-anxiety effect.
10.Chairside digital design and manufacturing method for children's band and loop space maintainers
Qingzhao QIN ; Jia HU ; Xiaoxian CHEN ; Bingqing SHI ; Zixiang GAO ; Yujia ZHU ; Aonan WEN ; Yong WANG ; Yijiao ZHAO
West China Journal of Stomatology 2024;42(2):234-241
Objective This study proposes a chairside digital design and manufacturing method for band and loop space maintainers and preliminarily validates its clinical feasibility.Methods Clinical cases of 10 children requiring space maintenance caused by premature loss of primary teeth were collected.Intraoral scan data of the affected children were also collected to establish digital models of the missing teeth.Using a pediatric band and loop space maintainer de-sign software developed by our research team,a rapid personalized design of band and loop structures was achieved,and a digital model of an integrated band and loop space maintainer was ultimately generated.A chairside space maintainer was manufactured through metal computer numerical control machining for the experimental group,whereas metal 3D printing in the dental laboratory was used for the control group.A model fitting assessment was conducted for the space maintainers of both groups,and senior pediatric dental experts were invited to evaluate the clinical feasibility of the space maintainers with regard to fit and stability using the visual analogue scale scoring system.Statistical analysis was also performed.Results The time spent in designing and manufacturing the 10 space maintainers of the experimental group was all less than 1 h.Statistical analysis of expert ratings showed that the experimental group outperformed the control group with regard to fit and stability.Both types of space maintainers met clinical requirements.Conclusion The chairside digital design and manufacturing method for pediatric band and loop space maintainers proposed in this study can achieve same-day fitting of space maintainers at the first appointment,demonstrating good clinical feasibility and significant potential for clinical application.

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