本文選題：牙冠形態(tài) + 牙齦形態(tài)��； 參考：《廣西醫(yī)科大學》2017年碩士論文

【摘要】：目的通過測量中國壯族青年與越南京族青年人群上頜前牙的牙冠和牙齦形態(tài)得出的數(shù)據(jù),對牙冠形態(tài)進行客觀分類,確定各種牙冠形態(tài)在研究人群中的分布比例,以及對比兩個民族之間牙冠和牙齦特征。為壯族和京族青年人群上前牙區(qū)牙冠及牙齦形態(tài)提供參考依據(jù)。方法選取年齡20-25歲的200名中國壯族和越南京族青年自愿者作為研究對象,采用硅橡膠印模材料獲取上頜牙列模型,使用數(shù)顯游標卡尺(精度0.01mm)測量并計算牙冠-牙齦形態(tài)相關(guān)的指標:牙冠寬長比(CW/CL),牙齦角度(GA),齦外展隙角度(GEA),鄰面接觸區(qū)百分比(PCAP)。根據(jù)上述的指標,通過聚類分析方法將牙冠形態(tài)分為3種類型:方圓形,卵圓形和尖圓形。測量結(jié)果通過SPSS 20.0軟件進行統(tǒng)計分析。結(jié)果1.測量得出了中國壯族和越南京族青年人上前牙區(qū)CW/CL,GA,GEA,PCAP四組牙齦參數(shù)的相關(guān)數(shù)據(jù)。2.聚類分析牙冠形態(tài)的分類結(jié)果如下:中國壯族:方圓形(35%)、卵圓形(44%)、尖圓形(21%);越南京族:方圓形(26%)、卵圓形(50%)、尖圓形(24%)。3.牙冠外形的分布在兩個民族之間差異無統(tǒng)計學意義。4.越南京族組3種牙冠形態(tài)的GA,GEA,PCAP均值均大于中國壯族組的數(shù)據(jù),差別有統(tǒng)計學意義(P0.001)。結(jié)論:中國壯族和越南京族在3種牙冠形態(tài)的分布比例無明顯差異;越南京族人群上前牙的GA,GEA,PCAP在3種牙冠形態(tài)大于中國壯族人群的數(shù)據(jù)。
[Abstract]:Objective by measuring the data of the crown and gingival shape of the maxillary anterior teeth of the Chinese Zhuang youths and the young people of the Jing nationality of Vietnam, the shape of the crown was classified objectively, the distribution ratio of various dental crown forms in the study population was determined, and the crown and gingival features between the two nationalities were compared. Methods the dental crown and gingival shape were provided as reference basis. Methods 200 Chinese Zhuang and Vietnamese young volunteers of 20-25 years old were selected to obtain the maxillary teeth model with silicone rubber impression material, and the number of vernier calipers (precision 0.01mm) was used to measure and calculate the index of crown and gingival shape: the crown width ratio (CW/C L) the gingival angle (GA), the angle of the gingival abduction gap (GEA) and the percentage of adjacent area contact area (PCAP). According to the above indexes, the crown morphology was divided into 3 types: square, oval and round. The results were analyzed by the SPSS 20 software. Results 1. measured the Chinese Zhuang and Vietnam Jing nationality young people. Correlation data of CW/CL, GA, GEA, PCAP four groups of gingival parameters in the anterior teeth area.2. cluster analysis of crown morphology as follows: Chinese Zhuang: square round (35%), oval (44%), and round (21%); Vietnam Jing Nationality: square round (26%), oval (50%), and round (24%).3. crown distribution between two nationalities have no statistical significance.4.. The GA, GEA and PCAP values of the 3 dental crowns in the Nanjing group were all greater than those of the Chinese Zhuang group, and the difference was statistically significant (P0.001). Conclusion: there was no significant difference in the distribution ratio of the 3 kinds of crown forms between the Chinese Zhuang and the Vietnam Jing Nationality, and the GA, GEA and PCAP in the upper teeth of the Vietnamese Beijing population were more than the data of the Chinese Zhuang population.

【學位授予單位】：廣西醫(yī)科大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：R781

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本文編號：1855822