Research advances in the use of digital surgical guides in implantology / 华西口腔医学杂志

Dental implants have become the main choice for patients to fill in their missing teeth. A precise placement is the basis for a functional and aesthetic restoration. A digital surgical guide is a carrier that transfers the preoperative plan of dental implants to the actual surgery. This paper provides some references that can help clinicians improve the accuracy of implant surgery by stating the development, classification, advantages and disadvantages, and factors that affect the accuracy of digital guides.

Outpatient loyalty and its influential factors with high-end medical services in a comprehensive grade-A tertiary hospital / 中南大学学报(医学版)

To evaluate the loyalty and its influential factors for outpatients with high-end medical services in a comprehensive grade-A tertiary hospital.
 Methods: A total of 3 196 outpatients from July 2017 to June 2018, who visited the International Medical Department of a comprehensive grade A tertiary hospital, were investigated by a self-designed loyalty questionnaire. The Cronbach's alpha coefficient was 0.893. A third-party organization conducted the survey and 1 883 valid questionnaires were collected. Chi-square test and logistic stepwise regression model was used to analyze the influential factors for patients' loyalty.
 Results: The loyalty of outpatients with high-end medical services was 95.8%, and the satisfaction of all aspects of outpatient service was more than 94%. After adjusting for sex, age, the protective factors were diagnostic and therapeutic effect (OR=5.45, P<0.001), service level of nurses (OR=3.91, P=0.044), doctors' skills of communication and explanation (OR=2.95, P=0.046), degree of convenience (OR=3.04, P=0.038) and visits in recent three months (OR=2.11, P=0.008).
 Conclusion: The loyalty of outpatients with high-end medical services in a comprehensive grade A tertiary hospital is relatively high. Significant diagnostic and therapeutic effect, good service of nurses, good skills of communication and explanation, convenience and multiple visits are related to high loyalty.

Effect of High Positive Acceleration (+Gz) Environment on Dental Implant Osseointegration:A Preliminary Animal Study / 生物医学与环境科学（英文）

OBJECTIVE@#To observe the effect of high positive acceleration (+Gz) environment on dental implant osseointegration in a rabbit model and to investigate its mechanism.@*METHODS@#Forty-eight New Zealand white rabbits were randomly divided into 6 groups. The rabbit's mandibular incisors were extracted and 1 implant was placed in each socket immediately. After 1 week of rest, the rabbits were exposed to a high +Gz environment, 3 times a week. The rabbits were sacrificed at 3 weeks (2 weeks +Gz exposure), 5 weeks (4 weeks +Gz exposure), and 12 weeks (4 weeks +Gz exposure and 7 weeks normal environment) after surgery, respectively. Specimens were harvested for micro-CT scanning, histological analysis, and real-time polymerase chain reaction examination.@*RESULTS@#Compared with those in the control group, the mRNA expression levels of bone morphogenetic protein-2 (BMP-2), osteopontin (OPN), and transforming growth factor-β1 (TGF-β1) were significantly lower (P < 0.05), while the mRNA expression level of receptor activator of nuclear factor κB ligand (RANKL) and the RANKL/osteoprotegerin (OPG) ratio were significantly higher (P < 0.05) at 3 weeks; values of bone volume fraction, trabecular number, bone-implant contact (BIC), and TGF-β1 and OPG mRNA expression levels were significantly lower (P < 0.05), and the value of trabecular separation, RANKL mRNA expression level and RANKL/OPG ratio were significantly higher (P < 0.05) at 5 weeks; and the value of BIC was still significantly lower (P < 0.05) at 12 weeks in the experimental group.@*CONCLUSION@#Early exposure to the high +Gz environment after implant surgery might have an adverse effect on osseointegration, and its mechanism could be related to the inhibition of osteoblast activity and promotion of osteoclast activity.

The value of interleukin 35 in assessing the prognosis of severe hepatitis / 中国基层医药

Objective To explore the significance of interleukin -35 (IL -35)in serum of patients with severe hepatitis.Methods Collected 39 cases of chronic hepatitis B(CHB)patients and severe hepatitis,and col-lected 19 cases of healthy control's(HC)peripheral blood at the same time.ELISA method was used to detect IL -35 levels.Results IL -35 in CHB and severe hepatitis group [(483.5 ±280.7)ng/mL and (277.9 ±248.7)ng/mL] were higher than HC group (50.5 ±47.8)ng/mL(t =2.089,3.303,P =0.044,0.002).In severe hepatitis group, the IL -35 levels in survivors group (305.3 ±301.2)ng/mL was higher than death group (78.7 ±33.2)ng/mL (P =0.012).IL -35 was positively correlated with ALT and AST,the correlation coefficient were 0.649 and 0.599. Conclusion IL -35 is involved in the pathogenesis of hepatitis B process,the low serum IL -35 levels in severe hepatitis patients may herald a bad prognosis.

Manipulative reduction and internal fixation by percutaneous locking compression plate for the treatment of mid-distal tibiofibula shaft fractures / 中国骨伤

<p><b>OBJECTIVE</b>To investigate the clinical effects of manipulative reduction and percutaneous locking compression plate internal fixation for the treatment of mid-distal tibiofibula shaft fractures.</p><p><b>METHODS</b>From January 2006 to October 2009,46 patients suffering from mid-distal tibiofibula shaft fractures were treated with closed manipulative reduction and LCP, involved 27 males and 19 females with an average age of 39 years old ranging from 17 to 56 years. According to AO classification, there were 12 cases of type A, 24 of type B, 10 of type C. The duration of visiting hospital were from 2 hours to 3 days after being injured for these patients. The injured limbs of the patients were swollen and painful,even with bony crepitus. The wound, function of the injured limb and union of fractures were observed after operation.</p><p><b>RESULTS</b>All the patients were followed up from 12 to 18 months (averaged 15 months). It was found that the wound of all patients had primary healing without any infection. The fracture healing time was 12 to 18 weeks (means 14 weeks). The results were excellent in 40 cases,good in 4 and fair in 2.</p><p><b>CONCLUSION</b>Less invasive, more stable fixation, shorter healing time and better functional rehabilitation are observed in the treatment of mid-distal tibiofibula shaft fractures after manipulative reduction and percutaneous locking compression plate internal fixation.</p>

Effect of varying lingual traction forces on the space-closing speed in a typodont model / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the influences of varying lingual traction forces on the space-closing speed in a typodont model.</p><p><b>METHODS</b>Forty-two Angle Class I standard typodont models of bimaxillary teeth protrusion were divided into 7 equal groups. Four regions of the model were paired to groups, and in the odd-numbered models, the top left and bottom left regions served as the experimental group and the top right and bottom right regions as the control group; in the even-numbered models, the regions in the model were grouped oppositely. In the experimental group, the space was closed by niti wire extension spring in the buccal ridge combined with lingual elastic traction of 0, 5, 10, 15, 20, 25 and 30 g. In the control group, the space was closed by exclusive niti wire extension spring in the buccal ridge. The space-closing speed were analyzed in all the groups.</p><p><b>RESULTS</b>The space-closing speed was significantly lower in the control group than in the experimental groups with lingual traction forces of 5, 10, 15, 20 and 25 g (P<0.05), but a traction force of 30 g resulted in a significantly lower speed than that in the control group (P<0.05). The space closing speed was the greatest in the experimental group with a traction force of 15 g (P<0.05).</p><p><b>CONCLUSION</b>Niti wire extension spring in the buccal ridge combined with lingual elastic traction results in faster space-closing speed than traditional exclusive niti wire extension spring. The speed is the fastest by applying 15 g lingual traction, which is also associated with the lowest slip resistance.</p>

CLINICAL STUDY ON COMPARISON OF DIFFERENT LOADING-DOSE OF CLOPIDOGREL ON ACUTE CORONARY SYNDROME / 现代医院

Objective To compare the efficiency and safety of clopidogrel of different loading-dose in acute coronary syndromes(ACS) patients with percutaneous coronary intervention(PCI) therapy, and, give an assessment of security about higher loading dose of clopidogrel. Methods 120 patients from January 2008 to January 2009 in our hospital were included.They were randomly divided into 3 groups(na=nb=nc=40)and were given 600 mg,450 mg and 300 mg clopidogrel on the 6 hour before PCI. There was no significant difference between the three groups' basic clinical information(p>0.05),such as age, sex and so on. Four points were selected to observe: the platelet aggregation induced by ADP with 5umol/L before and two hours、four hours, six hours after taking medicine; Primary endpoint events, which include shock during hospitalization, death, target revascularization, myocardial infarction, recurrent angina, stroke in 30 days,and Postoperative Bleeding events and adverse Reactions after Surgery in 30 days. Results compared to the standard dose of 300 mg clopidogrel, 600 mg doses clopidogrel can give a greater degree of inhibition on platelet activating than 450 mg doses in the pre-6 h after administration. Increase Clopidogrel loading dose can reduce the occurrence of major cardiovascular events rate. Bleeding events and the occurrence of adverse events was no significant difference among three groups. Conclusions compared to the standard dose of 300 mg clopidogrel, a higher loading dose of clopidogrel can produce much more faster, greater platelet inhibition, and similar security.

Study of the Clinical Parameters in One Hundred and Eleven Patients of Obstructive Sleep Apnea-hypopnea Syndrome / 医学研究杂志

Objective To explore the possible correlation of the clinical parameters(such as neck circumference,waist circumference,Hipc,WHR,BMI,ESS scores)with the severity of obstructive sleep apnea/hypopnea syndrome(OSAHS).Methods There were 111 patients with diagnosis of OSAHS.All patients underwent polysomnography and the physical examination.The meatured body parameters and AHI were analyzed.Results A statistically significant correlation between neck circumference,waist circumference,Hipc,WHR,BMI with the AHI was detected.No correlation was found between ESS and AHI.Except for Hips and ESS,the difference of neck circumference,waist circumference,WHR,BMI were significant between the different serious patients(P