全牙列[牙合]垫切牙区延伸范围对松动牙固定效果的影响  

Influence of the incisal extension of occlusal plate for full-dentition on the splinting performance of traumatic teeth

作　　者：朱远兵 赖光云[1] 汪俊[1] Zhu Yuanbing;Lai Guangyun;Wang Jun(Department of Pediatric Dentistry,Shanghai Ninth People’s Hospital,Shanghai Jiao Tong University School of Medicine,College of Stomatology,Shanghai Jiao Tong University,National Center for Stomatology,National Clinical Research Center for Oral Diseases,Shanghai Key Laboratory of Stomatology)

机构地区：[1]上海交通大学医学院附属第九人民医院儿童口腔科,上海交通大学口腔医学院,国家口腔医学中心,国家口腔疾病临床医学研究中心,上海市口腔医学重点实验室,上海200011

出　　处：《口腔材料器械杂志》2022年第3期180-185,共6页Chinese Journal of Dental Materials and Devices

摘　　要：目的 探讨全牙列[牙合]垫切牙区的延伸范围对体外松动牙固定效果的影响。方法 在体外仿生牙模上扩大11和21的牙槽窝,同期建立外伤牙模。使用万能试验机分别测量仿生和外伤牙模11和21的水平和垂直动度,验证模型有效性。按照全牙列[牙合]垫延伸范围的不同,实验分5组(n=10):G1:[牙合]垫自16-26唇(颊)腭侧覆盖至龈缘,远中覆盖16、26远中边缘嵴;G2:自龈缘剪去11-21唇侧的1/2;G3:自龈缘剪去11-21唇侧3/4;G4:自龈缘剪去12-22唇侧1/2;G5:自龈缘剪去12-22唇侧3/4。使用万能试验机测量11和21经各组[牙合]垫固定后的水平和垂直动度。采用t检验分别比较了11和21固定后动度与仿生模型、松动模型11和21动度之间的差异,使用Welch近似F检验比较松动模型11和21动度、经各组[牙合]垫固定后11和21动度之间的差异。结果 ①仿生牙模的各个牙齿动度处于正常牙生理范围内,说明建模成功。②组间比较结果显示,与松动牙模型11、21的水平动度相比,固定后各组11、21的水平动度均显著降低(P<0.05);与松动牙模型11、21的垂直动度相比,除经G5[牙合]垫固定后11和21的垂直动度降低不显著外,其余组别11、21的垂直动度均显著性降低。③当[牙合]垫切龈向延伸范围较大时,改变[牙合]垫近远中向延伸均会对11和21固定后水平向和垂直向的动度产生显著影响(P<0.05)。结论 在体外模型上,改变全牙列[牙合]垫切牙区的延伸范围能在一定程度上影响其固定性能,建议在临床应用中需根据牙外伤的实际情况适当地设计全牙列[牙合]垫的延伸范围。Objective The aim of this study was to investigate the splinting effect of incisal extension areas of the removable splints on traumatic teeth in vitro.Methods A bionic model was established and then the alveolar sockets of 11 and 21 were expanded to different size to imitate the luxation teeth.The horizontal and vertical mobility of 11 and 22 on the bionic and traumatic model were measured by a universal testing machine to verify the effectiveness of the model.According to the different incisal extension of removable splints,the samples were divided into five groups:G1:The labial(buccal)and palatal surface of the teeth(16-26)were covered to the gingival margin,and distally to the distal marginal ridge of 16 and 26;G2:1/2 of labial side 11-21 was clipped from gingival margin;G3:3/4 of labial side 11-21 was clipped from gingival margin;G4:12 to 221/2 of labial side was clipped from gingival margin;G5:3/4 of the labial side was clipped 12-22 from the gingival margin,n=10.The horizontal and vertical mobility of 11 and 21 were gauged by a universal testing machine before and after splinting with removable splints of different extension.T test was used to compare the differences between the mobility of splinted 11 and 21 and the mobility of 11 and 21 on bionic model,as well as the difference between the splinted 11 and 21 and the traumatic 11 and 21.The Welch approximate F test was used to compare the difference between traumatic 11 and 21 and the mobility of 11 and 21 splinted with removable splints.Results①The mobility of each tooth of the bionic tooth model was within the physiological mobility of teeth,indicating that the modeling was successful.②The group comparison showed that,compared with the horizontal mobility of traumatic 11 and 21,the horizontal mobility of 11 and 21 was significantly decreased after splinting in all groups(P<0.05);Compared with vertical mobility of traumatic 11 and 21,the vertical mobility was significantly reduced except 11 and 21 splinted with G5.③When the incisal-gingival extensi

关 键 词：全牙列[牙合]垫 牙外伤 牙脱位 固定 

分 类 号：R783.5[医药卫生—口腔医学]