上海市长宁区儿童乳牙反调查分析

目的了解上海市长宁区儿童乳牙反的患病情况。方法以个别正常为标准,对1 750名3⁵岁儿童进行口腔检查。结果本区乳牙反的患病率为12.46%,5岁组男女间存在高度显著性差异(P<0.01),其他年龄组男女间及各年龄组间无显著性差异。乳牙反的主要表现是多个乳前牙反。结论乳牙反是一种常见的口腔疾病,应早发现,早预防,早治疗。     

Numb在肿瘤发生中的作用机制

<正>细胞内多基因表达异常是恶性肿瘤发生发展的基础,相关研究越来越多地集中在关键基因的探索,近年来发现的Numb蛋白在肿瘤形成、浸润与转移     

辛伐他汀对去势大鼠骨生长代谢的影响

目的:观察辛伐他汀对去势大鼠骨密度和骨生长代谢的作用。方法:40只雌性SD大鼠随机分成4组,正常对照假手术组(Sham)-A,单纯去势组(OVX)-B,去势雌激素治疗组-C;去势辛伐他汀治疗组-D。术后第30天,C组以体质量每100g每天给0.1mg尼尔雌醇灌胃,每周1次,持续12周。D组以辛伐他汀5mg/(kg·d)灌胃,连续服用1周,停2周,再服用1周,间断持续12周。用药12周后,所有大鼠被处死采取胫骨标本,处死前第12和第4天进行四环素双标记。标本行不脱钙骨切片,硝酸银和VonKossa染色,骨形态计量学方法检测各治疗方法对胫骨近心端干骺的作用效果。结果:单纯去势组(OVX)-B与对照假手术组(Sham)-A相比,其胫骨有明显的骨质疏松表现。与OVX相比,雌激素组、辛伐他汀组去势大鼠胫骨骨形态计量学静态参数%Tb.Ar、Tb.N,Tb.Sp有明显差异(P<0.01)。辛伐他汀组的动态骨形成参数%L.Pm、MAR、BFR/BV、%O.Pm及荧光双标间隔均明显高于其他各组(P<0.01),骨吸收参数Oc.N、%E.Pm低于单纯去势组,但高于雌激素组和假手术组(P<0.01),雌激素组骨吸收参数Oc.N、%E.Pm相对单纯去势组显著下降(P<0.01)。结论:辛伐他汀能降低大鼠去势后骨转换,促进骨的生长,并能抑制骨的吸收作用。     

Comparison of in vitro and in vivo wear of composites

In vitro wear data were determined for nine experimental composites and compared with two-year clinical data. The in vitro tests included single-pass wear and two-body abrasion. The in vivo data were obtained between 1978 and 1980 for 54 class 2 posterior composite restorations in 25 patients. Correlations between the in vitro and in vivo data were found with values of alpha less than 0.08.     

氟在釉质牙磷灰石发育中的作用

氟化物在口腔预防医学中扮演着十分重要的角色,它犹如一把双刃剑,一方面在促进牙体硬组织生物矿化、减少龋病发生过程中发挥重要作用;另一方面,过多的氟化物摄取则会引起牙体组织的病理改变。本文对氟在牙釉质发育中的作用进行综述,探讨其对釉质牙磷灰石晶体的影响。     

无锡市银行系统人员口腔情况调查

目的了解江苏省无锡市银行系统职工的龋病流行学特征。方法采用整群抽样方法调查2627名银行职工的患龋情况,并按不同年龄组进行统计学分析。结果21~30岁年龄组患龋率为29.79%,龋均为0.79;30~40岁组患龋率为30.87%,龋均为1.23;40~50岁组患龋率为60.75%,龋均为1.43;经统计学分析,40~50岁年龄组患龋率明显高于其他两组。而龋均随年龄增长而逐渐增加。结论应重视中老年人的龋病并尽早预防。     

Role of crevice in the occurrence of hemoglobin in saliva

The aim of the present study was to analyze the role of the gingival-periodontal component in the presence of blood in saliva. We studied a population of 184 adult patients composed of 101 totally edentulous patients with no oral mucosa lesions and 83 dentulous patients with clinically healthy gums. Saliva samples obtained by spontaneous salivation were collected in sterile containers. Qualitative and quantitative evaluation of each of the samples was performed. 67% of the dentulous patients tested positive for hemoglobin in saliva. None of the patients in the totally edentulous group exhibited hemoglobin in saliva. These data suggest that the periodontal condition is an essential factor for the presence of hemoglobin in saliva.     

青岛市口腔医生对乳牙牙外伤处理的认知调查

目的研究青岛地区口腔医生对乳牙牙外伤处理的认知水平。 方法利用2018年8月青岛市儿童口腔疾病预防公益项目培训会议期间,向参会医生发放经过验证的调查问卷,进行乳牙牙外伤处理认知调查,使用χ²检验对结果进行统计分析。 结果调查相关口腔医生170名,共回收有效调查问卷168份（98.8%）。结果分析：青岛地区口腔医生对乳牙折断性损伤处理方案选择的正确率为53.57%,对乳牙牙脱位性损伤处理方案选择的正确率为72.62%,对乳牙全脱位处理方案选择正确率为58.33%。卡方检验显示,不同医疗机构和不同职称的口腔医生在大多数问题的选择正确率上没有明显差异（P>0.05）,第7、9、11、13题中,儿童口腔医生对乳牙外伤处理方案选择正确率分别为88.9%、55.6%、97.2%和91.7%,非儿童口腔医生选择正确率分别为67.2%、13.7%、76.2%和81.1%,差异均具有统计学意义（χ²⁷ = 6.844,P₇ = 0.009;χ²⁹ = 17.3,P₉<0.001;χ²¹¹ = 9.056,P₁₁ = 0.003;χ²₁₃ = 2.291,P₁₃ = 0.130）。 结论青岛市口腔医生对乳牙牙外伤处理方案的选择整体正确率较低,不同的医疗机构和不同职称的口腔医生在处理方案的选择上没有明显差异,儿童口腔医生对乳牙外伤处理方案选择的正确率更高。     

Comparison of the effectiveness of three different methods in detection of changes in gingivitis in the primary dentition

The pattern of distribution and development of gingivitis is different in children and adults. Also the anatomy in the primary dentition is different from that in the permanent dentition. Indices to measure gingival inflammation and changes in this condition have been designed for the permanent dentition and may not necessarily perform adequately in the primary dentition. The purpose of the present study was to assess the association between indices commonly used in adults and to compare their ability to detect changes in gingivitis in children. The correlation between the Gingival Index and percent bleeding units (scores 2 and 3) was r = 0.93, while provoked bleeding from the interdental area correlated only weakly with the two. However, the non-bleeding papilla index seemed to more effectively detect changes in the gingival condition induced by professional cleaning. Since gingivitis usually is less severe in the primary dentition than in the permanent dentition, it may be of importance to use an index with high sensitivity in studies where effect of interventions is to be evaluated in children.     

Impact of the implantation of a new curriculum in the process of learning in a Faculty of Dentistry in Brazil

The aim of the present study was to evaluate two dental curricula at a school of dentistry in southern Brazil. The study population included dentists trained in the last two classes of the institution's old curriculum (n = 98) and graduates of the first two classes of the new curriculum (n = 56). A questionnaire with open and closed questions was used for an overall evaluation of different aspects of the curricula, such as study methods, importance given to basic sciences, quality of theoretical and clinical guidance, perception about skills needed to perform different dental procedures, professional goals and an overall assessment. Students in the new curriculum reported more frequent use of the internet (69.6%) and scientific articles (50.0%). More importance was given to the basic sciences in the new curriculum. Graduates of the old curriculum alleged themselves to be more capable of both performing conventional (99%) and complex amalgam restorations (68.4%), as well as three-unit fixed prostheses (62.2%). Graduates of the new curriculum alleged higher capability with periodontal surgeries (48.2%), treatment of temporomandibular joint (TMJ) disorders (58.1%) and public health planning (78.6%). Regarding professional goals, the new curriculum was associated with an increase in the graduates' willingness to work in the public health system and to pursue an academic career. New curriculum graduates reported higher overall assessments regarding their educational, as well as theoretical and clinical, outcomes. A new curricular approach was associated with several changes from the perspective of the students.     

银川市儿童青少年龋病患病趋势分析

的　分析银川市儿童青少年龋病患病的发展趋势及特点。方法　1990、1996和2001年采用WHO口腔 流行病学调查方法对银川市3岁、5岁、12岁和15岁的儿童青少年进行调查,记录龋均、龋面均和龋齿充填比率,并 进行统计分析。结果　1990~2001年,3岁、5岁和12岁儿童青少年的龋患呈下降趋势(P<0·01), 15岁青少年龋 患无明显变化;少部分儿童乳牙龋患严重;龋齿的充填比率较低。结论　随着口腔健康教育的开展,银川市儿童青 少年龋患呈下降趋势,但应加强对龋易感儿童的诊断、预防和早期治疗,提高龋齿充填比率。