Objective:To evaluate the efficacy and analyze the causes of complications of allogeneic decellularized dermal matrix grafts in the treatment of gingival recession using tunneling technology.Methods:Sixty patients with single or multiple gingival re-cession were randomly divided into an allogeneic decellularized matrix(ADM)group and a connective tissue(SCTG)group.Tunne-ling technique(TUN)were used in both groups to cover the root surface,and the gingival margin position,gingival margin morpholo-gy,and mucogingival junction position of the affected teeth at 1 week,3 weeks,3 months,and 6 months after surgery were observed.Check and record the gingival recession depth(RD)and mean root coverage(MRC)at the implant site before and 6 months after surgery.Record patient satisfaction at 3 weeks and 6 months after surgery.Results:Compared with the traditional SCTG group,the MRC of the ADM group was significantly lower before surgery and 6 months after surgery(P＜0.05).The satisfaction level of the ADM group was higher 3 weeks after surgery,with a significant difference compared to the SCTG group(P＜0.05).But 6 months after surgery,the satisfaction levels of the two groups tended to be consistent,with no significant difference.After TUN+ADM surgery,there was 1 case of abscess infection lesion,and another 3 cases showed local tissue necrosis at the gingival margin one week after surgery.After 3 months of treatment,the gingival color of these 4 patients was pink and tough texture,without swelling and bleeding.Conclusion:Although ADM is slightly inferior to SCTG in the treatment of gingival recession,it may be related to poor postoperative tissue healing complications.However,as long as it is handled properly,long-term follow-up observations have shown that gingival tissue can still achieve complete healing.TUN+ADM is a highly effective treatment for gingival recession and is suitable for further clinical application.

Objective:To evaluate the efficacy and analyze the causes of complications of allogeneic decellularized dermal matrix grafts in the treatment of gingival recession using tunneling technology.Methods:Sixty patients with single or multiple gingival re-cession were randomly divided into an allogeneic decellularized matrix(ADM)group and a connective tissue(SCTG)group.Tunne-ling technique(TUN)were used in both groups to cover the root surface,and the gingival margin position,gingival margin morpholo-gy,and mucogingival junction position of the affected teeth at 1 week,3 weeks,3 months,and 6 months after surgery were observed.Check and record the gingival recession depth(RD)and mean root coverage(MRC)at the implant site before and 6 months after surgery.Record patient satisfaction at 3 weeks and 6 months after surgery.Results:Compared with the traditional SCTG group,the MRC of the ADM group was significantly lower before surgery and 6 months after surgery(P＜0.05).The satisfaction level of the ADM group was higher 3 weeks after surgery,with a significant difference compared to the SCTG group(P＜0.05).But 6 months after surgery,the satisfaction levels of the two groups tended to be consistent,with no significant difference.After TUN+ADM surgery,there was 1 case of abscess infection lesion,and another 3 cases showed local tissue necrosis at the gingival margin one week after surgery.After 3 months of treatment,the gingival color of these 4 patients was pink and tough texture,without swelling and bleeding.Conclusion:Although ADM is slightly inferior to SCTG in the treatment of gingival recession,it may be related to poor postoperative tissue healing complications.However,as long as it is handled properly,long-term follow-up observations have shown that gingival tissue can still achieve complete healing.TUN+ADM is a highly effective treatment for gingival recession and is suitable for further clinical application.

Objective:To explore the risk factors of intracranial aneurysm interventional embolization for subarachnoid hemorrhage (SAH) perioperative infection.Methods:A retrospective analysis of the clinical data of 236 SAH patients who underwent aneurysm interventional embolization in the Department of Neurosurgery, Huangshan Shoukang Hospital from May 2018 to December 2019, and statistics of the surgical treatment effects and postoperative conditions of all patients, according to the perioperative Infective status in the early stage, the patients were divided into infected group ( n=44) and non-infected group ( n=192) according to the perioperative infection, and the clinical indicators of the patients were recorded, including age, gender, history of drinking, smoking history, history of diabetes, and whether there was any temporary blockade during the operation, aneurysm location, triacylglycerol, lipoprotein type, CT-Fisher classification, history of hypertension, aneurysm diameter, number, albumin, Hunt-Hess classification, Glasgow coma score (GCS) at admission, number of punctures. Measurement data were expressed as the mean ± standard deviation ( Mean± SD), comparison between groups was by t-test; count data comparison between groups was by Chi-square test. Logistic regression was used to analyze the risk factors of infection in SAH patients during perioperative period. Results:The treatment success rate of all SAH patients was 100%; the results of univariate analysis showed that the history of hypertension, aneurysm diameter, number, albumin, Hunt-Hess classification, GCS score at admission, and number of punctures were compared between infected group and non-infected group, the difference was statistically significant ( P<0.05); the results of multivariate Logistic regression analysis showed that history of hypertension, aneurysm diameter ≥8 mm, a large number of aneurysms, albumin ≤35.12 g/L, Hunt-Hess classification Grade Ⅲ to Ⅳ, GCS score> 5 points at admission, and number of punctures>2 times were risk factors for perioperative infection in SAH treated by interventional embolization of intracranial aneurysm; the total score of all factors in the nomogram prediction model was 314.84 points, the corresponding value was 14.96% of the perioperative infection rate of intracranial aneurysm interventional embolization for SAH. Conclusions:Interventional embolization of intracranial aneurysm for SAH can achieve good clinical results. However, history of hypertension, aneurysm diameter ≥ 8 mm, a large number of aneurysms, albumin ≤ 35.12 g/L, Hunt-Hess grade Ⅲ to Ⅳ, GCS score > 5 points at admission, number of punctures> 2 times are all independent risk factors leading to perioperative infection in patients, and clinical attention should be paid to and actively prevented.

Objective To investigate the therapeutic effect of the hemilaminectomy approach in intraspinal tumor with the help of intraoperative ultrasound,high-speed drill and ultrasound knife.Methods Clinical data of 35 cases with the intraspinal tumor were analyzed retrospectively.All the patients were treated by hemilaminectomy approach,the position of the lesions were fixed by preoperative X-ray and intraoperative ultrasound,root of the spinous process were removed in order to achieve adequate visual field by high-speed drill and ultrasound knife.Electrophysiologic monitoring were used if the lesions were in the spinal cord.Results Total surgical resection was achieved in 32 cases,gross total resection was in 3 cases.Twenty-eight of the 35 cases were followed up.The symptom alteration of the first period ( 1 - 3 months postoperative):improved in 25 cases,no changed in 2 cases,aggravated in 1 case.The symptom alteration of the second period (6-24 months postoperative):no changed in all cases,no stability change of the vertebral column had been found.Conclusions Followed with the development of the electrophysiologic monitoring,high-speed drill,intraoperative ultrasound,the indication of the hemilaminectomy and have no influence of the spinal stability.However,to spinal meningioma which have a wide base,the hemilaminectomy approach may not adapt.

Objective To investigate the therapeutic effect of the fourth ventricle tumors through lateral wall type of the transcerebellomedullary fissure approach under endoscope.Methods Clinical data of 14 cases with the fourth ventricle lesions were analyzed retrospectively.All the patients were treated by lateral wall type of the transcerebellomedullary fissure approach surgery.The endoscope was used if the lesions develop to the aqueduct and hard to be exposed.Both neurophysiological monitoring and intraoperative ultrasound were used regularly.Results Tumors were totally removed in 12 cases,subtotally in 1,and partially in 1.All the patients were diagnosed in postoperative histopathology,including 4 medulloblastoma,three epidermoid cyst,two ependymoma,two hemangioblastoma,one meningioma,one cavernous hemangioma and 1 astrocytoma.Hypopnea occurred immediate after operation in 1 patient.Ventilatory support was performed by Ventilator,and the respiration was restored 1 day later.Normal cerebrospinal fluid circulation was return in all cases.Neither aggravation of preoperative symptoms nor nuclei injury related complication had been found.The follow-up interval between 3 months to 28 months,one patient was dead with unexplained,and 1 medulloblastoma patient was relapse.Conclusion Lateral wall type of the transeerebellomedullary fissure approach,under endoscope,combined with the usage of neurophysiological monitoring and intraoperative ultrasound,can degrade the surgical related complications such as facial palsy and amblyacousia.

Objective To explore the efficacy and safety of 980 nm diode laser therapy for treatment of benign prostatic hyperplasia (BPH). Methods Data of 170 patients with BPH treated with 980nm diode laser system were reviewed. The mean operative time, blood loss, surgical complications, the international prostate symptom score (IPSS), bladder residual urine volume and flow rate changes were collected and analyzed. Results One hundred and seventy cases were safe during the perioperative period. The average operation time was (74 ± 11) min, surgical removal of prostate tissue mass of (54±12) g, blood loss (72±11) ml. There was no TUR syndrome occurred. 170 patients were followed up 2 to 24 months. The IPSS decreased from preoperative 25.0±5.5 to 9.0±2.5. The maximum flow rate increased from preoperative (6.2±2.3)ml/s to post-operative (17.4±3.5) ml/s. The residual urine volume decreased from preoperative (210.0±25.6) ml to postoperative (25.2±4.6) ml. All the differences were statistically significant (P＜0.05). Conclusion Transurethral vaporization of 980 nm diode laser could be a safe and effective treatment modality for BPH.

Objective To approach operative technique for chronic sub, dural hematoma (CSDH).Method The clinical information including general state of health, operative technique and prognosis of the 250 cases with CSDH were retrospectively analyzed. Results Within the 250 cases, 202 were old people with age over 50 and 176 had definite trauma history. In 25 cases treated by burr hole and drainage, 5 cases who had hematoma recurrence and 10 cases who had pneumocephalus, among whom, 6 had tensional pneumoeephalus, were all cured by second operation while the rest got cured. In 207 cases treated by burr hole, douche and drainage, no pneumocephalus or intracranial infection occurred. Twenty of them relapsed and were cured by second operation. Cerebral contusion eccurred in 1 case for pipe was inserted into the brain tissue by mistake, but it got better after active therapy. The other 18 cases were all cured through eraniotomy,hematomas removal as well as envelope excision. Conclusions CSDH is common in the old with age over 50 and it has relationship with head injury,mostly. The single hole trepanation, douche and drainage is simple, safe ,with minimal trauma and high cure rate. To master the operative technique including douching thoroughly, drainage through a pipe and brain protection is very important to the success of the operation.

The facial, retromandibular and external jugular veins of the neck were studied in a total of 230 Chinese cadavers.1. The external jugular vein can be divided into six types and fourteen subtypes. Type Ⅰ(40.22％) and type Ⅲ (29.13％) occurred more frequently in this series.2. The facial vein drains into the external jugular vein in 41.09％. It drains directly or indirectly into the internal jugular vein in 43.91％.3. The anterior branch of the retromandibular vein usually drains into the internal jugular vein and it runs through the space deep to the posterior, belly of the digastric and the stylohyoid muscles in 83.70％.4. The presence of the so called common facial vein occurred only in 29.13％.5. The external jugular vein often drains into the subclavian vein. It appears in 46.57％ in our observation.6. The external jugular vein crosses the inferior belly of the omohyoid muscle, when it runs downwards in the lower part of the external cervical triangle. It usually lies superficial to the omohyoid in 66.16％, deep to it in 26.35％.