Objective To observe preventive effect of magnolia officinalis and artemisia capillaris on caries.Methods 67 patients with caries were randomly divided into a prevention group and a control group.After molar removal with traditional methods.the prevention group was given decoction of magnolia officinalis and artemisia capillaris,while the control group was given metronidazole.They were followed up for 3 months so as to observe its recurrence rate and adverse reaction.Results Effect of the prevention group on preventing caries was markedly superior to that of the control group(P＜0.05).Conclusion.The efficacy of magnolia officinalis and artemisia capillaris exerts a better effect than metronidazole.It's worth to promote application clinically.

Objective To observe cfinical effect of compound huanglian powder treating oral ulcer.Methods 92 patients with oral ulcer were randomly divided into a treatment group and a control group.The treatment group was treated with compound Huanglian powder,and the control group was treated with metronidazole.The therapeutic effects were observed in 2 months of following up after taking the medicines for one month.Results Effects on oral ulcer of the treatment group were obviously superior to those of the control group.which had a significant difference(P＜0.05).Conclusion The treatrment of compound Huanglian powder on oral ulcer was better than metronidazole.

Objective To observe effects of rhubarb extract on Ca dissolved quantity in demineralized enmnel. Methods Demineralization was performed after treating tooth facing with rhubarb extract of different concentrations and deionized water. The concentration of Ca was detected by ASCA biochemical analyzer after demineralization. Results Dissolved quantity of demineralized Ca in the rhubarb extract group (2 mg/ml, 4mg/ml) was significantly lower than that of the deionized water group (P<0.01) and the rhubarb extract group (1 mg/ml) (P<0.05), but higher than that of 2% sodium fluoride group (P>0.05). Dissolved quantity of demineralized Ca in the rhubarb extract (1 mg/ml) group was significantly higher thanthat of 2% sodium fluoride group (P<0.01), but lower than that of the deionized water group(P>0.05).Conclusion The rhubarb exwact (2mg/ml, 4mg/ml) can inhibit Ca dissolution in demineralized enamel.The inidal effective concentration of rhubarb extract is 2 mg/ml.

Objective To investigate the influence of streptozocin (STZ)'s dose on the inductive effect of diabetes in C57BL/6J mice, and investigate the dose-effect relationship and the optimal dose range. Methods 145 C57BL/6J mice were randomly divided into 9 diabetic groups (group A to group 1, n = 15 in each group) and I control group (n = I0) to receive intraperitoneal injection of STZ with the dosages of 30, 60, 80, 100, 120, 150, 180, 210, 240 mg/kg and same amount of buffer solution,respectively. Changes of blood glucose, body weight, survival rate at 45 day and serum insulin level were monitored, and the relationship with STZ doses was analyzed. Pancreas and kidneys of the mice were removed for morphological examination, and immunohistochemistry was used for determination of insulin in pancreas and CD<,68> in kidneys. Results Compared with control group, blood glucose in group C ～G increased significantly; body weigh, insulin level decreased significantly (P < 0.05), and the STZ dose was positively correlated with mean blood glucose (r = -0.984, P < 0.05) and was negatively correlated with mean serum insulin levels (r = 0.994, P <0.05). The diabetes modeling rates in group C ～ G (86.7% ～ 100%) were higher than those of group A and B (0 and 40%, P<0.05). At the 45th day, the survival rates of group C ～G (46.7% ～ 73.3%) were higher than those of group H and 1 (13.3% and 0, P <0.05). There was no obvious injury of pancreas and kidneys in group B, whereas, in group C and G, pancreatic island atrophy and decreased insulin secretion were observed; deposits of extracellular matrix and macrophage increased in the mesangium were also present. Conclusions 80 ～ 180 mg/kg of STZ dose was ideal for establishing diabetes model in C57BL/6J mice. Within this range, the modeling rate and survival rate was higher, and target organs injury was typical. The STZ dose was positively correlated with blood glucose and negatively correlated with serum insulin levels.

Objective: To analyze the clinical characters and surgical treatment of primary parapharyngeal space (PPS) tumors. Methods: A total of 23 cases of primary PPS tumors which were treated from November 2011 to December 2017 were included for the retrospective analysis in this study. Results: Twenty-three cases of patients with primary PPS tumors were analyzed in this study. Surgical approach was as follows: transcervial approach applied in 7 cases, transparotid approach in 4 cases, transoral approach in 2 cases, transmandibular approach in 4 cases, and the combined approaches on 6 cases. Besides, among 7 cases with upper PPS tumor, we applied the surgical navigation system in the surgery of 3 cases. The mean surgery duration of these cases, 3.5 h, was shorter than unused ones, while the mean maximum size (MMS) of tumors, 5.7 cm, was also larger. So far, 23 cases had no recurrence and metastasis. The most frequent histopathological type of all the cases was pleomorphic adenoma (8 cases), followed by Schwannoma (5 cases). With an 8-to-72-months follow up, 23 cases had no recurrence, metastasis or death. Conclusions Surgical resection is preferred in the treatment of PPS tumors. In the upper PPS tumor cases, the surgical navigation system could reduce the operative duration significantly and is more suitable for larger tumors.

Objective:To evaluate the curative effect of arthroscopic long head of biceps tendon (LHBT) transfer to reconstruct shoulder superior capsule for repairing massive rotator cuff tears.Methods:A retrospective case-control study was conducted on clinical data of 64 patients with massive rotator cuff tears admitted to Shanghai Tenth People's Hospital of Tongji University between December 2017 to January 2019. There were 26 males and 38 females, with the age of 50-75 years [(62.5±4.8)years]. All patients were treated by arthroscopic superior capsular reconstruction with LHBT. The shoulder range of motion in flexion, abduction, external rotation, acromiohumeral distance, visual analogue scale (VAS), Constant-Murley score and American Shoulder and Elbow Surgeons (ASES) score were evaluated and recorded before operation and at the last follow-up. The MRI was used to evaluate the integrity of the reconstructed structure at the last follow-up and rotator cuff re-tear rate. Postoperative complications were detected.Results:All patients were followed up for 13-25 months [(18.2±4.3)months]. At the last follow-up, the shoulder range of motion was (149.5±7.8)° in flexion, (162.0±6.6)° in abduction, and (60.6±11.8)° in external rotation; the acromiohumeral distance was (7.4±0.6)cm, the VAS was 1.0(0.0, 1.0)points, the Constant-Murley score was (90.5±2.6)points, the ASES was (90.8±4.2)points, which were significantly improved compared with those before operation [flextion: (73.8±5.3)°, abduction: (85.8±5.5)°, external rotation: (34.3±5.8)°, acromiohumeral distance: (5.9±0.8)cm, VAS: 6.5(6.0, 7.0)points, Constant-Murley score: (41.8±5.4)points, ASES: (41.4±6.1)points, respectively]( P<0.01). of all, 56 patients had intact reconstruction structure at the last follow-up, 7 patient with smalll retears in the reconstruction were not revised, and 1 patient underwent revision operation after reconstruction failure. The retear rate after rotator cuff repair was 13% (8/64). There were no obvious surgical complications after operation, with the incision free from infection. Conclusion:Arthroscopic superior capsular reconstruction with LHBT for repairing massive rotator cuff is safe and reliable, which can effectively relieve the pain of shoulder joint, recover the function and improve the joint mobility.

Objective:To investigate the clinical efficacy of arthroscopic double-row double-pulley technique in the treatment of Ideberg type IA scapular glenoid fracture.Methods:A retrospective case series study was conducted to analyze the clinical data of 16 patients with Ideberg type IA scapular glenoid fracture admitted to Jiading Branch of Shanghai General Hospital from January 2018 to December 2021, including 10 males and 6 females, aged 25-65 years [(42.9±5.1)years]. The patients were treated with arthroscope-assisted reduction and double-row double-pulley technique. The operation time was recorded. Three-dimensional reconstruction of the shoulder joint with CT was performed to assess fracture displacement and healing. Modified University of California Los Angeles (UCLA) score and Constant-Murley score were used to evaluate shoulder function and Visual Analogue Scale (VAS) score was used to evaluate pain before surgery, at 3, 6, 12 months after surgery and at the last follow-up. The complications were observed.Results:All the patients were followed up for 12-36 months [(20.3±4.4)months]. The operation time was 60-90 minutes [(74.7±8.9)minutes]. Three-dimensional construction of the shoulder joint with CT performed at 3 months after surgery showed that there was no fracture re-displacement and all the patients had bone union. The modified UCLA score, Constant-Murley score and VAS score at 3 months after surgery were (30.4±0.4)points, (84.3±1.4)points and 2.0(1.3, 3.0)points, respectively, which were significantly improved compared with those before surgery [(21.1±0.5)points, (56.4±1.3)points and 5.0(5.0, 6.0)points respectively] ( P<0.05). The modified UCLA score, Constant-Murley score and VAS score at 6 months after surgery were (33.1±0.4)points, (91.0±0.5)points and 1.0(1.0, 2.0)]points respectively, which were significantly improved compared with those at 3 months after surgery ( P<0.05). The modified UCLA score, Constant-Murley score and VAS score at 12 months after surgery were (33.5±0.3)points, (92.6±0.6)points and 1.0(0.3, 1.8)points respectively, showing no significant differences from those at 6 months after surgery ( P>0.05). The modified UCLA score, Constant-Murley score and VAS score at the last follow-up were (33.8±0.8)points, (93.7±1.8)points and 1.0(0.0, 1.0)points respectively, with no significant differences from those at 12 months after surgery ( P>0.05). There were no complications such as wound infection, neurovascular injury or shoulder stiffness after surgery. Conclusion:Arthroscopic double-row double-pulley technique for the treatment of Ideberg type IA scapular glenoid fracture has a short operation time, a high fracture healing rate, good shoulder function recovery, and pain relief, with no common complications.

Objective:To analyse clinical outcomes and risk factors of vascular crisis on patients received oral and maxillofacial defect repairations with free tissue flap.Methods:From January, 2013 to July, 2018, 1 049 patients with soft tissue defect of oral and maxillofacial were reconstructed with free tissue flap, in which 64 cases occurred vascular crisis. Among the cases, 28 defect were reconstructed with radial forearm free flap (RFFF), 19 with anterolateral thigh flap (ALTF), and 17 with fibula flap. All patients underwent surgical exploration. The clinical data and surgical outcomes were collected. The univariate analysis and multivariate regression analysis were performed by using SPSS version 22.0 software. The result was supposed to statistically significant when P<0.05. Results:Among 64 patients occurred vascular crisis, 44 flaps were rescued successfully by surgical procedures (68.8%). Univariate analysis revealed that the salvage rate was related to the smoking history, type of tissue flap, time of vascular crisis occurrence, cause of vascular crisis and the time interval between crisis occurrence and surgical exploration ( P<0.05). Multivariate regression analysis revealed that only type of tissue flap, the time of vascular crisis occurrence and the interval time were the independent significant factors for salvage rate ( P<0.05). Conclusion:The salvage rate became higher when the vascular crisis occurred earlier, and the interval time was shorter. The type of tissue flap could affect the outcome of surgical exploration. The success rate decreased with an order of RFFF, ALTF to fibula flaps. The primary principle in the management of vascular crisis was early identification and early surgical exploration.