Bacterial adhesion of SureFil SDR as a preventive resin filling / 中国组织工程研究

BACKGROUND: SureFil SDR as a lining material has better adaptability and unique automatic leveling characteristics as compared with other flowing resins, but its application in preventive resin filling has not been reported. OBJECTIVE: To compare the roughness and bacterial adhesion among pit and fissure sealant, Z350 XT fluid resin and SureFil SDR resin, and to explore the feasibility of preventive resin filling with SureFil SDR resin. METHODS: Pit and fissure sealant, Z350 XT fluid resin and SureFil SDR resin were prepared into 8 mm× 2 mm× 2 mm cuboid specimens respectively. The surface roughness of the three specimens was measured by MarSurf roughness meter. Pit and fissure sealant, Z350 XT fluid resin and SureFil SDR resin were prepared into 8 mm× 8 mm× 2 mm cylinder specimens respectively. The specimens were cultured in Streptococcus mutans suspension for 48 hours to detect the bacterial adhesion on the material surface. RESULTS AND CONCLUSION: The roughness of the three materials was ranked as follows: SureFil SDR resin < Z350 XT fluid resin < pit and fissure sealant, and there were significant differences between groups (P < 0.05). The bacterial adhesion on the surface of the three materials was ranked as follows: SureFil SDR resin < Z350 XT fluid resin < pit and fissure sealant, and there were significant difference between groups (P < 0.05). The correlation between roughness and bacterial adhesion was analyzed, and there was a high positive correlation between roughness and bacterial adhesion, indicating, with the decrease of material roughness, bacterial adhesion decreased (r=0.962, P=0.017 6). The results show that SureFil SDR is an ideal preventive resin filling and sealing material relative to pit and fissure sealant and Z350 XT fluid resin.

Autogenous Vein Grafts in Repair of Major Arterial Injuries of Limbs / 中华创伤杂志

one year after operation)follow-up, 95.7% of which had their extremities of excellent circulation and vein grafts patency in 18 cases were determined by doppler-ultrasonic imaging studies. An autogenous vein graft was proved to be a safe, readily accessible and effective means by which peripheral injuries can be repaired.

SURGICAL TREATMENT OF INJECTION INJURY OF PERIPHERAL NERVE:A REPORT OF 62 CASES / 解放军医学杂志

Surgical treatment of postinjection injury of peripheral nerve in 62 patients are reported, 50 patients were followed-up for 3 years in average. Neurolysis is an effective method in the treatment of such injuries with 64 percent of excellent and good result observed in this series. The results of operation were related to the degree of severity of nerve injury, timing of operation, and extent of adhesion of the injured nerve. The result of early operation is better than late operation.

OSSIFICATION OF THE LIGAMENTUM FLAVUM IN THE THORACIC SPINE: A REPORT OF TWENTY-SIX CASES / 解放军医学杂志

Twenty-six patients with stenosis of the thoracic spinal canal and myelopathy caused by ossification of the ligamentum flavum were treated from 1983 to June 1991. There were 21 patients with spastic paraplegia and 5 with flaccid paraplegia in the series. The findings on radiograms, CT scans, myelograms and MRI were described. Total laminectomy was performed in all of the patients which resulted in an effective rate of 91.6% and exellent and good results in 83.3%. The mechanism of the disease our experience in diagnosis and surgical treatment, causes of misdiagnosis and surgical techniques are discussed.

REPEATED OPERATIVE TREATMENT FOR LUMBAR PROLAPSED DISC WITH RECURRENCE OR FAILURE AFTER INITIAL OPERATION / 解放军医学杂志

18 out of 779 operated cases for lumbar prolapsed disc at our department were reoperated with excellent or good results obtained in 17 and improvement in 1. 14 out of these were initially treated at our department with satisfactory results for from 2 months to 12 years before symptoms recurred while 4 were first operated upon at other hospitals with good results in 2 and failure for the others after the primary operation. The recurrence rate is 14/779 in our service, i. e. 1.8%, lower than those previously reported.Reoperation for recurrent cases is generally considered extremely difficult and result uncertain because of extensive scar and dense adhesions about the nerve coot and dura. More often than not the results reported in literature were not good enough to warrant reoperation. Consequently those recurrent patients in our series so badly incapacitated would have to suffer or remain crippled for lifetime were they not reoperated. However our patients were salvaged by reoperation with meticulous performance after careful clinical evaluation as to diagnosis, indication and tyfe of operation adopted. Operative procedure for exploration and resolution of coexisting spinal stenosis is discussed in detail.