Objective:To compare the healing of gingiva after electrosurgical gingivectomy with different power outputs and electrodes. Methods:15 rabbits were randomly assigned to 3 groups which used different electrodes: needle electrode, long loop electrode and loop electrode. 1 animal was chosen as control in each group. Free gingiva of anterior teeth had been removed 2 mm in height with different power output and electrosurgical knife. Gingival specimens were harvested for histopathological study on days 1,7,14,and 21 after operation. Statistical analysis was performed on wound healing. Results:Electrical knife with medium power output caused significantly higher degree of inflammation than other techniques(P0.05). Conclusion:When electrosurgery is used on gingiva, there is no significantly difference with different electrodes. Longer observation is needed after gingival electrosurgery with medium power output electrical knife.

Oil of Eveningprimrose was extracted from the seed of Oenothera biennis by supercritical CO2 extraction.A yield of 20% oil was obtained at 50℃ and 25MPa. Its ?-linolenic acid content was 10. 6%. Acid value and saponification number of the oil was determined.

Objective To investigate the changes and clinical significance of QT dispersion of patients with acute myocardial infarction especially those after thrombolitic therapy. Methods QTd, QTcd, QTLcd of 56 patients with AMI and 54 healthy people were measure through computer ECG. Results (1) The indexes of QTd in AMI group were significantly longer than normal ( P

目的观察盐酸文拉法辛治疗慢性疼痛的临床疗效。方法慢性疼痛中具有抑郁症状的患者90例分为两组，每组45例。Ⅰ组：曲马多缓释剂100 mg，每日2次；Ⅱ组：曲马多缓释剂100 mg,每日2次，盐酸文拉法辛75 mg，每日1次。4周后记录Zung氏抑郁评分（SDS）和疼痛视觉模拟评分(VAS)。结果治疗后组内和组间的SDS、VAS值均有显著性差异。结论盐酸文拉法辛可增加镇痛药物疗效。

Objective To observe the effects of the re-therapeutic on later stage of sudden deafness.Methods Patients who met the criteria for sudden deafness and showed poor response tO conventional therapy over two months were recruited and assigned randomly for re-therapy.The pure tone audiometry was conducted before and after re-treatment in 103 patients(112 ears).Sodium bicarbonate and dexamethasone were iniected by intravenous drip for two days and batroxobin 5 BU for 6 days.Statistics were made in the effecency of the re-treatment.Results The effective rate of re-treatment group was 46.43% and the difference was significant before and after retreatment(P<0.01).Conclusion Combined use of sodium bicarbonate dexamethasone and batroxobin is effective in re-treating later sudden deafness.

Objective To investigate the feasibility and efficacy of vaginal sacrospinous ligament fixation (VSSLF) procedure which reserving uterus in the treatment of uterine prolapse. Methods 8 cases with uterine pro-lapse underwent VSSLF procedures which reserving uterus from July 2006 to December 2008. Those with incontinence d urine simultaneously underwent ventrofixation of the middle piece of the urethra and folding of the ligamentum pos-terius of the uretha and those with anterior or posterior vaginal wall prolapse underwent eolporrhaphia anterior-posteri-or. Results All patients successfully accomplished by VSSLF,without intraoperative or postoperative hemorrhage or organ injury. All patients' prolapse symptoms were relieved efficently according to the pelvic organs prolapse quantifi-cation(POP-Q). Patients were followed-up for 18 months after operation. 8 patients all recovered well without any complication related to the procedure after operation. Conclusion VSSLF is a simple,safe,effective and micro-inva-sire way for patients with uterine prolapse who want to reserve uterus.

Objective To discuss different effect of periocular injection and subconjunctival injection in treatment of iridocyclitis. Methods Eighty people with iridocyclitis were divided into group A and group B according to their admission order. Group A adopted periocular injection and group B was given subconjunctival injection. The incidence of complication was compared between the two groups. Results Significant difference existed in complications and related factors between two groups after treatment, periocular injection proved to be superior to subconjunctival injection. Conclusions Periocular injection is a desirable treatment method for iridocyclitis. It is easy to operate, safe, rapid and with less pain, so it is worthy of clinical application.

Objectives To explore the process and regularity of graft after vascularized bone allograft. Methods An adult rabbit model of massive femoral defect was established and reconstmcted with vascularized bone allograft based by laterial rotating femoral vessel.The experiments were carried out in two groups,the experimental group(vascularized bone allograft)and the control group(nonvascularized bone allograft).Then observation on periosteum,cortex and marrow was performed after operation containing in ink-infused specimen. Results The revascularization in the experimental grouD was observed synchronicly on periosteum,cortex and marrow after operation,while the phenomenon of vascularization took place from periosteum to marrow in the control group.The density of micro-vessel in experimental group were 10.0±1.8,15.8±1.5 and 13.8±1.5,13.8±1.5 respectivly after 2,4,8 and 16 weeks.and those were 2.8±0.8,6.0±0.9,5.5±1.0,6.0±1.1 in control group.The ink-infused experiment demonstrated a better revascularization in the experimental group. Conclusion The vaseularization can promote revascularization of graft during bone allograft.

Objective To investigate the status of microchimerism in recipients and the relation between microchimerism and immunologic tolerance after vascularized allograft bone transplantation. Methods X-ray and histological examinations were performed on recipients after massive vascularized shaft of femur from female Japanese white rabbit donors was transplanted to male recipients. Microchimerism in different organs and tissues were checked postoperatively using a semi-quantitative polymerase chain reaction (PCR) with a Y-chromosome specific primer at different time. Results X-ray and histological examinations showed typical bone union in the experiment group but irregular new bone calluses surrounded the transplanted bones, with high density sequestrum in the control group.Semiquantitative PCR with a Y-chyomosome specific primer indicated that the incidence of microchimerism in organs and tissues in the experiment group was higher than that in the control group postoperatively and increased with time. Conclusions After vascularized allograft bone transplantation, organs and tissues show microchimerism that has a positive correlation with the histocompatibility of the transplanted bones.

Objective To investigate the safety and feasibility of fast track surgery (FTS)in patients with vaginal hysterectomy for non -prolapsed uterus.Methods 1 1 0 cases of vaginal hysterectomy for non -prolapsed ute-rus with benign uterine disease were randomly divided into two groups:fast track group (n =55)and conventional group (n =55).The operative time,intraoperative blood loss,postoperative nausea and vomiting,anal exhaust time, postoperative hospital stay,medical cost and perioperative complications were compared between the two groups. Results In FTS group,the incidence rate of postoperative nausea and vomiting,the postoperative anal exhaust time, hospital stay,cost of hospitalization were 1 6.4%,(1 3.73 ±2.41 )h and (4.38 ±1 .08 )d,(7 541 .00 ± 253.1 7)yuan,respectively,which in the control group were 36.4%,(1 8.56 ±1 .54 )h,(4.89 ±1 .26 )d, (8 1 55.1 5 ±495.89)yuan,the differences were statistically significant between the two groups (χ2 =5.67,t =-1 2.53,-2.28,-8.1 7,all P <0.05).There was no significant difference in the operative complications between the two groups (P >0.05).Conclusion FTS has good security.It can short the hospitalization time,reduce medical costs and improve the quality of life in patients who underwent vaginal hysterectomy for non -prolapsed uterus with benign uterine disease.