1.Acupuncture for lumbar myofascial pain syndrome: systematic review and Meta-analysis.
Ran ZHANG ; Sheng-Yue WEN ; Hong-Sheng ZHAN ; Xun LIN ; Min ZHANG ; Jian PANG ; Yue-Long CAO ; Bo CHEN
Chinese Acupuncture & Moxibustion 2023;43(11):1324-1332
This study systematically reviewed the clinical efficacy of acupuncture for lumbar myofascial pain syndrome. The randomized controlled trials (RCTs) regarding acupuncture for lumbar myofascial pain syndrome were searched in PubMed, Cochrane Library, Web of Science, EMbase, Scopus, China national knowledge infrastructure (CNKI), Wanfang database, VIP database, and China biomedical literature service system (SinoMed) from database inception until August 1st, 2022. The Cochrane's risk of bias assessment tool was used to assess the risk of bias in all included studies, and Review Manager 5.3 software was used for statistical analysis of the extracted data. As a result, 12 RCTs, involving 1 087 patients with lumbar myofascial pain syndrome, were ultimately included. The Meta-analysis results showed that the visual analog scale (VAS) score of pain in the observation group was lower than those in the oral non-steroidal anti-inflammatory medication control [SMD=-1.67, 95%CI (-2.44, -0.90), Z=4.26, P<0.000 1] and other treatment control [low-frequency electrical stimulation, tuina, electromagnetic wave irradiation combined with piroxicam gel, SMD=-1.98, 95%CI (-2.48, -1.48), Z=7.74, P<0.000 01]. The pain rating index (PRI) score in the observation group was lower than those in the lidocaine injection control [MD=-2.17, 95%CI (-3.41, -0.93), Z=3.44, P=0.000 6] and other treatment control [low-frequency electrical stimulation, tuina, MD=-5.75, 95%CI (-9.97, -1.53), Z=2.67, P=0.008]. The present pain intensity (PPI) score in the observation group was lower than that in other treatment control [low-frequency electrical stimulation, tuina, MD=-1.04, 95%CI (-1.55, -0.53), Z=4.01, P<0.000 1]. In conclusion, compared with oral non-steroidal anti-inflammatory medication, low-frequency electrical stimulation, tuina, and electromagnetic wave irradiation combined with piroxicam gel, acupuncture is more effective in reducing pain in patients with lumbar myofascial pain syndrome; acupuncture also exhibites advantage over lidocaine injection in improving PRI score and showed better outcomes over tuina and low-frequency electrical stimulation in improving PRI and PPI scores.
Humans
;
Piroxicam
;
Acupuncture Therapy/methods*
;
Pain
;
Myofascial Pain Syndromes/therapy*
;
Anti-Inflammatory Agents, Non-Steroidal/therapeutic use*
;
Lidocaine
2.Huoxin Pill Reduces Myocardial Ischemia Reperfusion Injury in Rats via TLR4/NFκB/NLRP3 Signaling Pathway.
Ce CAO ; Yu-Tong QI ; Ao-Ao WANG ; Zi-Yan WANG ; Zi-Xin LIU ; Hong-Xu MENG ; Lei LI ; Jian-Xun LIU
Chinese journal of integrative medicine 2023;29(12):1066-1076
OBJECTIVE:
To explore the protective effect of Huoxin Pill (HXP) on acute myocardial ischemia-reperfusion (MIRI) injury in rats.
METHODS:
Seventy-five adult SD rats were divided into the sham-operated group, model group, positive drug group (diltiazem hydrochloride, DH), high dose group (24 mg/kg, HXP-H) and low dose group (12 mg/kg, HXP-L) of Huoxin Pill (n=15 for every group) according to the complete randomization method. After 1 week of intragastric administration, the left anterior descending coronary artery of the rat's heart was ligated for 45 min and reperfused for 3 h. Serum was separated and the levels of creatine kinase (CK), creatine kinase isoenzyme (CK-MB) and lactate dehydrogenase (LDH), superoxide dismutase (SOD), and malondialdehyde (MDA), hypersensitive C-reactive protein (hs-CRP) and interleukin-1β (IL-1β) were measured. Myocardial ischemia rate, myocardial infarction rate and myocardial no-reflow rate were determined by staining with Evans blue and 2,3,5-triphenyltetrazolium chloride (TTC). Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform (TCMSP) and Bioinformatics Analysis Tool for Molecular mechANism of Traditional Chinese Medicine (BATMAN) databases were used to screen for possible active compounds of HXP and their potential therapeutic targets; the results of anti-inflammatory genes associated with MIRI were obtained from GeneCards, Drugbank, Online Mendelian Inheritance in Man (OMIM), and Therapeutic Target Datebase (TTD) databases was performed; Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment were used to analyze the intersected targets; molecular docking was performed using AutoDock Tools. Western blot was used to detect the protein expression of Toll-like receptor 4 (TLR4)/nuclear factor kappa-B (NFκB)/NOD-like receptor protein 3 (NLRP3).
RESULTS:
Compared with the model group, all doses of HXP significantly reduced the levels of LDH, CK and CK-MB (P<0.05, P<0.01); HXP significantly increased serum activity of SOD (P<0.05, P<0.01); all doses of HXP significantly reduced the levels of hs-CRP and IL-1β (P<0.05, P<0.01) and the myocardial infarction rate and myocardial no-reflow rate (P<0.01). GO enrichment analysis mainly involved positive regulation of gene expression, extracellular space and identical protein binding, KEGG pathway enrichment mainly involved PI3K-Akt signaling pathway and lipid and atherosclerosis. Molecular docking results showed that kaempferol and luteolin had a better affinity with TLR4, NFκB and NLRP3 molecules. The protein expressions of TLR4, NFκB and NLRP3 were reduced in the HXP group (P<0.01).
CONCLUSIONS
HXP has a significant protective effect on myocardial ischemia-reperfusion injury in rats, and its effect may be related to the inhibition of redox response and reduction of the inflammatory response by inhibiting the TLR4NFκB/NLRP3 signaling pathway.
Humans
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Rats
;
Animals
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NF-kappa B/metabolism*
;
Myocardial Reperfusion Injury/drug therapy*
;
NLR Family, Pyrin Domain-Containing 3 Protein
;
Rats, Sprague-Dawley
;
C-Reactive Protein
;
Toll-Like Receptor 4
;
Phosphatidylinositol 3-Kinases/metabolism*
;
Molecular Docking Simulation
;
Signal Transduction
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Myocardial Infarction/drug therapy*
;
Creatine Kinase
;
L-Lactate Dehydrogenase/metabolism*
;
Superoxide Dismutase/metabolism*
3.Proteomics reveals the protective mechanism of salvianolate injection on early hyperacute myocardial infarction
Ao-ao WANG ; Lei LI ; Zi-yan WANG ; Ce CAO ; Ying LI ; Zi-xin LIU ; Ling-mei LI ; Yue SHI ; Yan-lei MA ; Ying-hong PAN ; Jian-xun LIU
Acta Pharmaceutica Sinica 2023;58(5):1188-1195
The hyperacute stage of myocardial infarction refers to a period of time within 30 minutes after the occurrence of myocardial infarction, when the symptoms are not obvious and the diagnosis is difficult, and the related pathophysiological mechanism has received less attention. In this study, proteomics was used to investigate the pathological changes in the early hyperacute phase of myocardial infarction, aiming to provide experimental evidence for pathological mechanism of myocardial infarction hyperacute stage. Meanwhile, the intervention effect and related mechanism of salvianolate injection were discussed based on heat shock protein B6 (HSPB6), aiming to benefit the clinical rational use of salvianolate injection. The protein expression changes before and after myocardial infarction model establishment were detected by label-free proteomics
4.Epidemic characteristics of malaria cases before and after malaria elimination in Hubei Province
WU Dong-ni ; ZHANG Hua-xun ; ZHU Hong ; WAN Lun ; SUN Ling-cong ; CAO Mu-min ; XIA Jing ; ZHANG Juan
China Tropical Medicine 2023;23(6):579-
Abstract: Objective To collect and organize malaria case data in Hubei Province from 2017 to 2021, compare and analyze the malaria epidemic characteristics on the before and after malaria elimination, and provide scientific support for Hubei Province to further optimize the comprehensive strategies to prevent re-transmission after the elimination of malaria. Methods The study was conducted by collecting the data of reported malaria cases of Hubei during 2017-2021 from the Infectious Disease Surveillance Reporting and Management System, and conducting the epidemiological characteristics of malaria on pre-elimination (2017-2019) and post-elimination (2020-2021). Results A total of 429 cases of imported malaria were reported in Hubei Province from 2017 to 2021, and the malaria epidemic showed an obvious trend of rising first and then falling. On the pre-malaria elimination, 374 malaria cases were reported, including 262 cases of P.falciparum (70.05%); on the post-malaria elimination, 55 malaria cases were reported, including 25 cases of P.falciparum (45.45%). There was a statistically significant difference in the proportion of infections caused by the four types of malaria parasites before and after the elimination of malaria (χ2=14.248, P<0.05). On the pre-malaria elimination, the peak of disease onset mainly occurred in January, July, and November; on the post-malaria elimination, the peak of disease onset mainly occurred in January to February, and December. Both before and after malaria elimination, the reported cases were mainly concentrated in Wuhan, Yichang, Huangshi, Xiangyang, Shiyan and Huanggang, but the range of cases showed a clear trend of narrowing. Before and after malaria elimination, malaria cases in Hubei Province were mainly among young and middle-aged males aged 30-49. The proportions of workers and migrant workers increased from 37.70% and 9.09% before the elimination to 50.91% and 18.18% after the elimination, respectively, with a statistically significant difference (χ2=17.839, P<0.05). The percentage of interval from onset of illness to initial diagnosis ≥ 5d decreased from 21.66% before the elimination to 10.91% after the elimination (χ2=6.448, P<0.05). The percentage of definitive diagnosis of malaria at initial diagnosis in town clinic increased from 18.18% before the elimination to 50.00% after the elimination. The proportion of malaria cases diagnosed by county-level medical institutions increased from 22.73% before the elimination to 34.55% after elimination. There was no statistically significant difference in the proportion of malaria cases diagnosed by medical institutions at all levels before and after the elimination of malaria (χ2=5.630, P>0.05). The proportion of cases with the interval between initial diagnosis and diagnosis within 24h increased from 43.85% before the elimination to 70.91% after the elimination. There was a statistically significant difference in the proportion of cases with the interval between initial diagnosis and diagnosis before and after the elimination of malaria (χ2=14.006, P<0.05). Before and after malaria elimination, all reported cases were mainly imported from African countries. Conclusions There are imported malaria cases reported every year in Hubei Province before and after the elimination of malaria, which poses a great challenge to the prevention of re-transmission. Therefore, it is necessary to strengthen the surveillance system, detect and standardize the treatment of imported malaria cases in a timely manner, conduct targeted retransmission risk surveys and assessments, and consolidate the achievements of malaria elimination.
5.Association between semen collection time and semen parameters: an observational study.
Shun BAI ; Xian-Chao DOU ; Hao-Lin QI ; Yan-Song ZHU ; Yin-Tao ZHANG ; Yi-Xun LIU ; Xue-Chun HU ; Cheng CAO ; Xian-Hong TONG ; Bo XU ; Li-Min WU ; Xiao-Hua JIANG
Asian Journal of Andrology 2023;25(3):339-344
The process of semen collection plays a key role in the quality of semen specimens. However, the association between semen collection time and semen quality is still unclear. In this study, ejaculates by masturbation from 746 subfertile men or healthy men who underwent semen analysis were examined. The median (interquartile range) semen collection time for all participants was 7.0 (5.0-11.0) min, and the median time taken for semen collection was lower in healthy men than that in subfertile men (6.0 min vs 7.0 min). An increase in the time required to produce semen samples was associated with poorer semen quality. Among those undergoing assisted reproductive technology (ART), the miscarriage rate was positively correlated with the semen collection time. After adjusting for confounders, the highest quartile (Q4) of collection time was negatively associated with semen volume and sperm concentration. A longer time to produce semen samples (Q3 and Q4) was negatively correlated with progressive and total sperm motility. In addition, there was a significant negative linear association between the semen collection time and the sperm morphology. Higher risks of asthenozoospermia (adjusted odds ratio [OR] = 2.06, 95% confidence interval [CI]: 1.31-3.25, P = 0.002) and teratozoospermia (adjusted OR = 1.98, 95% CI: 1.10-3.55, P = 0.02) were observed in Q3 than those in Q1. Our results indicate that a higher risk of abnormal semen parameter values was associated with an increase in time for semen collection, which may be related to male fertility through its association with semen quality.
Male
;
Humans
;
Semen Analysis
;
Semen
;
Sperm Motility
;
Sperm Count
;
Asthenozoospermia
;
Spermatozoa
6.Herbal Textual Research of Lonicerae Japonicae Flos in Famous Classical Prescriptions
Zhi-Chen CAI ; Xun-Hong LIU ; Yi CAO ; Ren-Shou CHEN ; Jian-Ming CHENG
Journal of Nanjing University of Traditional Chinese Medicine 2023;39(12):1242-1248
The name"Lonicerae Japonicae Flos"was first published in Materia Medica from Steep Mountainsides of the Southern Song Dynasty.After the Song Dynasty,the name was gradually used by later generations and became the proper name of medicinal ma-terials.The origin of the varieties of LJF is complicated in ancient times.Since the 2005 edition of the Chinese Pharmacopoeia has stip-ulated that L.japonica Thunb.is the only source of LJF,and medicinal parts are buds or flowers with initial bloom.It is mostly used for raw products,and the processing accessories are mainly wine.Shandong and Henan are the genuine producing area,and the quality of flower buds harvested at the first crop is better.Based on current research results combined with modern research results and re-source cultivation situation,the application and development of the classic prescriptions containing LJF(Simiao Yong'an Soup,Wuwei Disinfectant Drink and Tuoli Disinfection San)in the Catalogue of Ancient Classic Recipes(The First Batch)is suggested to use raw ma-terials from Shandong,Henan,and other genuine producing areas with L.japonica Thunb.being the origin,and the buds harvested from the first crop during the second white to big white period were preferred for medicinal use.Based on the clinical application litera-ture of famous classical prescriptions and bibliometric methods,the common dosage and average dosage of LJF in the three prescriptions were obtained,which could be used as the reference dosage of LJF in the development and utilization of famous classical prescriptions.
7.Comparison of the characteristics of NK cells after two different methods of expansion and observation of the clinical efficacy in patients who relapsed post allogeneic hematopoietic stem cell transplantation.
Xun Hong CAO ; Zhi Dong WANG ; Yu Qian SUN ; Jun KONG ; Sheng Ye LU ; Fei Fei TANG ; Yuan Yuan ZHANG ; Jing Zhi WANG ; Lan Ping XU ; Xiao Hui ZHANG ; Yu WANG ; Kai Yan LIU ; Xiao Jun HUANG ; Xiao Yu ZHAO
Chinese Journal of Hematology 2022;43(5):400-407
Objective: To explore the differences in the biological effects of different expansion systems on natural killer (NK) cells, as well as the safety and preliminary clinical efficacy in the treatment of patients with recurrence after allogeneic hematopoietic stem cell transplantation (allo-HSCT) . Methods: Peripheral blood cells from healthy donors were stimulated with either CD3 combined with CD52 or K562 feeder cells loaded with IL-21/4-1BB to induce NK cell expansion. Changes in the NK cell phenotype, cytokine secretion, and cytotoxicity before and after expansion were detected. We also evaluated the safety and clinical efficacy of two different expansion strategies for patients received NK infusion. Results: Compared with the CD3/CD52 monoclonal antibody amplification system, the feeder cell expansion group had a higher purity of NK cells and higher expression ratios of NK cell surface activation receptors such as DNAM-1 and NKp30, while inhibitory receptor CTLA-4 expression was low and NKG2D/CD25/CD69/ Trail/PD-1/TIM-3/TIGIT had no statistically significant differences between the groups. Further functional results showed that the expression level of KI67 in NK cells after expansion in the two groups increased significantly, especially in the feeder cell expansion group. Simultaneously, the perforin and granzyme B levels of NK cells in the feeder cell expansion group were significantly higher than in the CD3/CD52 expansion group. A retrospective analysis of eight patients who received monoclonal antibody-expanded NK cell reinfusion and nine patients with trophoblast cell-expanded NK cell reinfusion was done. The disease characteristics of the two groups were comparable, NK cell reinfusion was safe, and there were no obvious adverse reactions. Clinical prognostic results showed that in the CD3/CD52 monoclonal antibody amplification group, the MRD conversion rate was 50% (2/4) , and the feeder cell expansion group was 50% (3/6) . After 5 years of follow-up from allo-HSCT, three patients in the monoclonal antibody expansion group had long-term survival without leukemia, and the remaining five patients had died; two patients died in the feeder cell expansion group, and the other six patients had long-term survival. Six cases had GVHD before NK cell reinfusion, and GVHD did not aggravate or even relieved after NK cell reinfusion. Conclusions: Preliminary results show that the biological characteristics of NK cells with diverse expansion strategies are significantly different, which may affect the clinical prognosis of patients with recurrence or persistent minimal residual disease after HSCT. The two groups of patients treated with NK cells from different expansion strategies had no obvious adverse reactions after NK cell infusion, but efficacy still needs to be further confirmed.
Antibodies, Monoclonal/pharmacology*
;
Graft vs Host Disease/metabolism*
;
Hematopoietic Stem Cell Transplantation
;
Humans
;
Killer Cells, Natural
;
Retrospective Studies
;
Treatment Outcome
8.Analysis of the technical key points and clinical effect of full-endoscopic lumbar annulus fibrosus suture.
Zhen-Zhou LI ; Zheng CAO ; Hong-Liang ZHAO ; Wei-Lin SHANG ; Shu-Xun HOU
China Journal of Orthopaedics and Traumatology 2020;33(6):498-504
OBJECTIVE:
To introduce the technical key points of lumbar annulus fibrosus suture under full-endoscope and analyze the clinical efficacy of full-endoscopic lumbar discectomy and annulus fibrosus suture.
METHODS:
A total of 50 patients with non contained lumbar disc herniation treated with full-endoscopic lumbar discectomy and annulus fibrosus suture in our department between January 2018 and November 2018 were included. Full-endoscopic single-stitch suture through transforaminal approach or double-stitch suture through interlaminar approach was selected according to lesion level. The lumbar MRI and CT were reexamined on the second day and 3 months after surgery to evaluate the completeness of the discectomy and the adequacy of nerve decompression respectively. The patients were followed up on the second day, 3 months, 6 months, and 1 year after surgery for pain relief using visual analogue scale (VAS, 100 -point scale). The patients were followed up at 3 months, 6 months, and 1 year postoperatively for the recovery of lumbar spine function using Oswestry Disability Index(ODI). At the 1-year follow-up, the Macnab standard of lumbar spine function was evaluated, and the recovery of nerve root function (sensory, muscular and reflex) was recorded.
RESULTS:
All operations were successfully completed, of which 27 patients were treated with transforaminal approach(including 8 cases of L and 19 cases of L), and 23 patients(including 11 cases of L and 12 cases of LS) with interlaminar approach. The average operation time was 43.2 minutes. There were no surgical complications and no recurrence of lumbar disc herniation. Postoperative lumbar MRI and CT examinations of all patients showed that the herniated disc was completely removed and the nerveswere fully decompressed. All patients had significant relief of low back pain and lower extremity radiation pain, and the ODI score improved significantly(<0.01). At 1 year postoperative follow up, 17 patients got an excellent result, 29 good and 4 fair according to Macnab evaluation system. On the first year after surgery, the sense of damaged nerve roots and muscle strength were significantly restored (<0.01), but tendon reflexes were not significantly restored (>0.05).
CONCLUSION
Full-endoscopic lumbar discectomy and annulus fibrosus suture are safe and effective techniques for minimally invasive spinal surgery, which can reduce the recurrence rate of lumbar disc herniation after full endoscopic lumbar discectomy.
Annulus Fibrosus
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Diskectomy, Percutaneous
;
Endoscopy
;
Humans
;
Intervertebral Disc Degeneration
;
Intervertebral Disc Displacement
;
Lumbar Vertebrae
;
Retrospective Studies
;
Sutures
;
Treatment Outcome
9.Computer assisted reduction malarplasty using angled double L-shaped osteotomies
Hong TAN ; Wenxing XUN ; Congying ZHAO ; Zhen YU ; Lu DANG ; Fuxin MA ; Jin CAO ; Jinqing LI
Chinese Journal of Plastic Surgery 2020;36(2):126-133
Objective:To assess the clinical outcome of the novel computer assisted reduction malarplasty using angled double L-shaped osteotomies.Methods:Retrospective analysis of the 35 female patients who received reduction malarplasty surgery during June 2014 to April 2019 was conducted. Patients were divided into the conventional surgery group (9 cases) and the computer assisted surgery group (26 cases) based on their personal will. For the conventional surgery group, the zygomatic arch was repositioned inwardly after L-shaped osteotomy, and was rigidly fixed with miniplates and screws. The computer assisted reduction malarplasty was as follows: computer assisted angled double L-shaped osteotomies with surgical guide was performed intraorally, and the pre-bent titanium was used to setback the resected zygoma bone, which was then fixed with titanium miniplates and screws. Operation time, patients’ satisfaction (3-month follow-up) and postoperative complications (asymmetry and bone nonunion) were recorded and assessed. CT scans were performed to compare the preoperative design and 3-month postoperative follow-up for the computer assisted patient group. For statistical analysis, independent sample t test was used to analyze operation time of the 2 groups and chi-square test was used to analyze the data of patients’ satisfaction and asymmetry occurrence. P<0.05 was considered as statistically significant. Results:The mean operation time was (85.1 ± 17.8) min during computer assisted surgery versus (62.2±11.7) min during conventional surgery. The difference between the two groups was statistically significant ( t=3.53, P=0.020). Neither group showed noticeable resected bone shifting or soft tissue drooping. One patient in the conventional surgery group had bone nonunion on the right zygoma and partial absorption of the left zygomatic bone. The incidence of asymmetry in the computer-assisted group was 3.8% (1/26, surgical correction was not required), and 33.3% in the conventional surgery group (3/9, one patient required surgical correction). There was a statistically significant difference between the two groups ( χ2=6.179, P=0.046). Patients’ satisfaction in the computer-assisted group was 100% (26/26), and 78% (7/9) in the conventional surgery group ( χ2=7.929, P=0.019). Comparisons between the postoperative CT and preoperative simulation CT images showed that the position deviation of the resected bones was (0.21 ± 0.19) mm. Conclusions:In the present study, improved precision of zygomatic bone resection and bone setback was achieved in reduction malarplasty by using the angled double L-shaped osteotomies with computer assistance. Moreover, complication occurrences (asymmetry, bone nonunion etc.) were significantly decreased. Also, patients’ expectation was better achieved with this method.
10.Computer assisted reduction malarplasty using angled double L-shaped osteotomies
Hong TAN ; Wenxing XUN ; Congying ZHAO ; Zhen YU ; Lu DANG ; Fuxin MA ; Jin CAO ; Jinqing LI
Chinese Journal of Plastic Surgery 2020;36(2):126-133
Objective:To assess the clinical outcome of the novel computer assisted reduction malarplasty using angled double L-shaped osteotomies.Methods:Retrospective analysis of the 35 female patients who received reduction malarplasty surgery during June 2014 to April 2019 was conducted. Patients were divided into the conventional surgery group (9 cases) and the computer assisted surgery group (26 cases) based on their personal will. For the conventional surgery group, the zygomatic arch was repositioned inwardly after L-shaped osteotomy, and was rigidly fixed with miniplates and screws. The computer assisted reduction malarplasty was as follows: computer assisted angled double L-shaped osteotomies with surgical guide was performed intraorally, and the pre-bent titanium was used to setback the resected zygoma bone, which was then fixed with titanium miniplates and screws. Operation time, patients’ satisfaction (3-month follow-up) and postoperative complications (asymmetry and bone nonunion) were recorded and assessed. CT scans were performed to compare the preoperative design and 3-month postoperative follow-up for the computer assisted patient group. For statistical analysis, independent sample t test was used to analyze operation time of the 2 groups and chi-square test was used to analyze the data of patients’ satisfaction and asymmetry occurrence. P<0.05 was considered as statistically significant. Results:The mean operation time was (85.1 ± 17.8) min during computer assisted surgery versus (62.2±11.7) min during conventional surgery. The difference between the two groups was statistically significant ( t=3.53, P=0.020). Neither group showed noticeable resected bone shifting or soft tissue drooping. One patient in the conventional surgery group had bone nonunion on the right zygoma and partial absorption of the left zygomatic bone. The incidence of asymmetry in the computer-assisted group was 3.8% (1/26, surgical correction was not required), and 33.3% in the conventional surgery group (3/9, one patient required surgical correction). There was a statistically significant difference between the two groups ( χ2=6.179, P=0.046). Patients’ satisfaction in the computer-assisted group was 100% (26/26), and 78% (7/9) in the conventional surgery group ( χ2=7.929, P=0.019). Comparisons between the postoperative CT and preoperative simulation CT images showed that the position deviation of the resected bones was (0.21 ± 0.19) mm. Conclusions:In the present study, improved precision of zygomatic bone resection and bone setback was achieved in reduction malarplasty by using the angled double L-shaped osteotomies with computer assistance. Moreover, complication occurrences (asymmetry, bone nonunion etc.) were significantly decreased. Also, patients’ expectation was better achieved with this method.

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