Objective To compare coronal sealing abilities using fiber post and metal post after cyclic loading.Methods 45 teeth were randomly divided into three groups after root canal treatment(A,B,and C).Group A:restored with D.T-Light fiber post and composit resin cores;Group B:restored with prefabricated metal-post and composit resin cores;Group C restored with cast post-core system.The samples were loaded for 300 000 cycles,intermittently at a rate of 120 cycles per minute.Then linear coronal dye penetration around the posts were measured and recorded.The data were collected and analysed statistically.Results In group A microleakage were observed in 2 of 15 teeth,while microleakage were all the teeth from Group B and C.The mean microleakage length was(0.057±0.168) mm(Group A);(2.136±0.678)mm(Group B),and(2.358±0.838)(Group C),respectively.The differences between group A and B,C were significant(P0.001),while that between B and C was not(P﹥0.05).Conclusion Teeth restored with fiber post and composite resin cores showed better coronal sealing ability compared with those restored with metal post.

目的评价外伤性前牙牙体缺损断面达龈下的修复疗效。方法对外伤断面达龈下前牙行根管治疗、切龈术、植入根管桩、全冠修复。结果139颗牙通过1年观察,成功率为97.8%。结论外伤性断面达龈下的前牙经过合理治疗可达到较好的临床效果。

目的 有效预防和控制口腔科医院感染,保障医疗质量和医疗安全.方法 从医务人员观念、诊疗环境设置、消毒设施、消毒方法和程序、卫生学监测等方面进行整改.结果 提高了口腔科医务人员的医疗安全和规范操作意识,加强了领导对口腔科感染控制的重视.结论 通过行政干预和监督,口腔科感染控制预防措施可达到《广东省医疗机构口腔诊疗感染控制规范与考评标准》的要求,可最大限度地预防口腔科医院感染的发生.

Objective: The aim of this study was to investigate the relationship between molar dentoalveolar height and vertical growth patterns in normal occlusion. Methods: The cephalometric radiographs of 100 Guang Dong persons with normal occlusion were measured, the relationship between molar dentoalveolar height and six angle measurements, three facial height measurements were analysed by statistic methods. Results: Correlation coefficients showed that the molar dentoalveolar heights were positively related to anterior facial height, anterior lower facial height, posterior facial height, and negatively related to the angle of SN-MP, ODI. Mandibular molar dentoalveolar height showed positive correlation with the angle of ANB and negative correlation with APDI. Conclusion: The molar dentoalveolar height is closely related with the craniofacial height. This relationship should not be ignored in the planning of orthodontics.

Objective To obtain the normal value of posteroanterior cephalometric analysis for Cantonese with normal occlusion and to study the characteristics of normal tranverse craniofacial structure in Guangdong. Methods Posterioanterior cephalometric of 100 Cantonese with normal occlusion were measured and analysed by SPSS 11.0, and the obtained data was compared with that of Beijing, Shanghai and Turkish. Results The database of Cantonese with normal occlusion for posterioanterior cephalometric roentgenography was established. With the age increased, statistically significance showed between male and female. Statistically significant correlation were determined in most measurements. The difference between Guangdong and Shanghai, Beijing and Turkish adults indicated statistical significantly in some items respectively. Conclusion There is significantly difference in values of occlusion of posteroanterior cephalometric roentgenography among different region and different race. The established database would provide a foundation for the diagnosis and treatment of malocclusion.

目的研究广东正常牙合人颅颌面三维测量的相互关系。方法选取100名广东正常牙合人的头颅定位侧位片,确定21个标志点,输入计算机进行三维测量,得出17个线距,用SPSS11.0进行统计学相关、回归分析。结果全面高与全面宽、及面的矢状长度之间、上面高与上颌宽度及上颌长度之间、下后面高、下颌支高与下颌体长、下颌长之间存在统计学意义的相关性。全面高与上、下面高之间、下后面高与下颌支高之间均有极大的相关性,尤以下前面高与全面高的关系最为密切(r=0.929)。下前面高与全面高的比为55.726%。结论广东正常牙合人长、宽、高之间存在着相互协调的关系。

本科去年接治3例在私人牙科诊所拔牙后引起拔牙创剧痛的患者,经过碘仿治疗 ,均在半月左右痊愈.

作者对68例门诊反复发炎的正位有对牙合牙的智齿龈瓣用传统手术方法和电离子治疗仪进行治疗，发现电离子治疗仪有较多优点，报告如下： 资料：68例患者，男21例，女47例，年龄最小18岁，最大32岁，平均年龄23.5岁。其中手术切除15例，电离子灼除53例。 方法 手术切除法：彻底消炎后，阻滞麻醉下手术切除覆盖在牙冠上的龈瓣，创面缝合1～2针，1周拆线，创面愈合。15例患者中，13例因牙龈生长过快，再次出现症状，行第2次手术。 电子灼除法：消炎后阻滞麻醉下，用KD168型射频电离综合治疗仪灼除覆盖在牙冠上的龈瓣，术后螺旋霉素，甲硝唑，肿痛安常规用量口服3d，术中出血少，创面不须缝合，一般2周左右痊愈，无1例再次手术。 电离子灼除法优点：①术中出血少，牙齿暴露充分，利于操作；②术后基本无出血，创面不用缝合；③愈合时间一般为2周，牙齿生长快于创面，一般不需再次手术。 53例病人无1例重复手术，但该方法水肿疼痛时间较长。