Objective: To evaluate the influence of retention-form design of resin bonded fixed partial dentures(RBFPDs). Methods: Forty-five metal replicas of posterior metal RBFPDs were divided into 3 groups(n=15):C shape(control group), C shape + axial groove, C shape + pin hole. All the replicas were luted with Panavia F cement and subgroup of 5 specimens were subject to 70 N compressive load cycling for 0 cycles, 240 000 cycles , and 1 200 000 cycles respectively .Half of the cycles was on the central fossa of the pontics and half on the buccal inclined surface of the lingual cusp. Forces for dislodgment of the specimens were applied along the long axis of the abutment at a crosshead speed of 1.0 mm /min. The separation forces were recorded as maxium retention force at the time of dislodgement. Results: Se-paration forces of the C shape group (566.82?71.59 N)0.05). After 1 200 000 cycles, the retention force of the RBFPDs decreased significantly (P

Decision Making, Organizational ; Disasters ; Earthquakes ; Humans ; Public Health Practice ; Stress Disorders, Post-Traumatic

To study the etiology and treatment of relapsing polychondritis, especially tracheostenosis, 3 patients with severe relapsing polychondritis complicated with severe tracheostenosis were presented. The clinical features, criteria of diagnosis, etiology, therapy and prognosis were discussed. All the 3 cases were female. They were misdiagnosed as laryngopharyngeal inflammation with severe tracheostenosis, so that their correct diagnosis and treatment were delayed. The report and discussion of such cases are helpful to its early diagnosis and improve ment of their prognosis.

Objective The objective of digitalized patient records control is to meet some new demands set on patient records control under the new circumstances. Methods A computer system for digitalized patient records control and supporting processing, management and applications setups were established. Results The system put the contents of the patient records into various categories with difierent standards and designed relatively strict means of authorization. It rendered patient records easier to use and their control more strict, making it possible to make general use of the records without access to the original documents. As a result, data loss was avoided, authority over the data was put under control, data sharing was provided, and full and convenient use of data was realized. Conclusion Digitalized patient records control, a form of shaping computer-based patient records before the latter fully comes into being, enhances the efficiency of patient records application and reduces the pressure of paper records storage. It is a practical and effective way of controlling patient records.

The effects of chitosan and N,O-carboxymethyl chitosan on blood hemostasis are tested.The dynamic blood coagulation experiments show chitsan with low deacetylation degree has higher absorption ability.The experiments can't find that any altered red blood cell morphology or an unusual affinity between erythrocytes appears evidently in the ACD blood treated with chitosan.The concentration of the platelets on the chitosan surface may be one of causes that platelets produce blood coagulation.Chitosan is substituted by the carboxymethyl and has water solubility.But N,O-carboxymethyl chitosan can lead torouleau and not toaltering the morphology of the erythrocyte.The blood hemostasis effect is not obvious.The values of TT,PT,APTT and FIB are measured from blood and the results fail toprove that chitosan and N,O-carboxymethyl chitosan can activate the coagulation factors.

Congresses as Topic ; Humans ; Otorhinolaryngologic Surgical Procedures

Chitosan have applied extensively in the field of medicine. We review the mechanism of chitosan hemostasis. The effect of chitosan on hemostasis is independent of all known“Cascade-like”coagulation pathways,induding platelets and soluble coagulant factors. Chitosan induce hemostasis by coalesce erythrocytes to one another to form a blood clot. In addition,the use of chitosan in hemostat is indicated in this paper.

Objective To explore the efficacy and safety of the treatment of Xuezhikang and fluvastatin in elderly angina patients with mildly abnormal liver function .Methods 84 cases of ALT in 40-80u/L very elderly patients with coronary heart disease were randomly selected and divided into the two groups , the Xuezhikang group received Xuezhikang (0.6g,bid,orally),the fluvastatin group received fluvastatin (40mg,1time/night,oral),the total course was 12weeks,the TC,TG,LDL-C,HDL -C were measured before and after treatment ,liver function was measured once 2 -4times.If ALT was 3 times higher than before , Xuezhikang was instead of statins , if ALT was 5 times higher than before ,both of the two drags were withdrawaled .Results The TC,LDL,TG,HDL-C and ALT of the two groups were no significant difference before treatment (P >0.05),the TC,LDL,TG were decreased after treatment in the both group .There was no case of increased of ALT to three times in Xuezhikang group ,however ,ALT of 6 patients were increased more than three times in fluvastatin group ,four weeks after exchange of Xuezhikang ,the ALT were not continued to rise .Conclusion Both the two medicine can significantly lowered the cholesterol in very elderly patients with angina ,but the Xuezhikang were more safety in the patient with mild increased of liver function .

AIM: To observe the efficacy and safety of small incision manual nuncleofragmentation technology in hard-nucleus cataract.METHODS: Fifty-four patients (54 eyes) were performed with small incision manual nucleofragmentation and intraocular lens implantation.Uncorrected-visual acuity,corrected-visual acuity and astigmatism were measured before and after surgery.Anterior segment of eye,retina,surgical complications were observed.RESULTS: Preoperative uncorrected vision(LogMAR) was 1.095±0.171,corrected vision (LogMAR) was 0.994±0.158.Postoperative uncorrected vision(LogMAR) was 0.321±0.214 and corrected vision(LogMAR) was 0.276±0.179 at 1wk after operation.Both had statistical significance compared with uncorrected vision(LogMAR) (t=27.052,P<0.01) and corrected vision (LogMAR)(t=29.211,P<0.01) after cataract operation.Average preoprative corneal astigmatism was 0.93±0.34D,average postoprative astigmatism was 0.95±0.29D at 3mo,there was no statistical significance of astigmatism before and after surgery(t=1.048,P>0.05).No severe complications occurred in all cases.CONCLUSION: The technology of small incision manual nuncleofragmentation in hard-nucleus cataract is proved to be safe and effective.

To evaluate the clinical effect of small incision cataract extraction with a manual nucleus division technique combined with intraocular lens implantation in cataract operation of large quantities.
●METHODS: Totally 105 patients (105 eyes) underwent small incision cataract extraction surgery. Visual acuity was observed, eye condition, fundus and intraocular pressure were examined by slit lamp at postoperative 1wk; 1mo.
●RESULTS: The visual acuity improved significantly at postoperative 1mo, 89 cases (89 eyes) with better than 0. 3( 85%), 101 cases ( 101 eyes) with 0. 1 and above (96%). lt had short operation time, fewer complications and good anesthetic effect.
● CONCLUSlON: This operation is suitable for primary hospitals, which visual acuity improved obviously, without serious complications, and economic and feasible.