牙齿磨耗程度对Cerec光学印模咬合接触精确性影响的研究
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摘要
目的:研究不同程度磨耗的牙齿对CEREC Omnicam椅旁系统光学印模咬合接触精确性的影响。方法:从2016年12月~2017年6月来南昌大学附属口腔医院就诊的患者中,按纳入标准选择患者牙列中的84颗下颌第一磨牙作为研究对象,其中轻度磨耗41颗,中度磨耗43颗;CEREC Omnicam椅旁系统进行口内光学印模获取咬合接触图像,Canon EOS 60D单反相机记录口内咬合印迹图像,计算CEREC Omnicam系统内图像与相机拍摄图像的咬合接触区域的重叠率,评价口内光学印模咬合接触的精确性,SPSS17.0软件对实验数据进行统计分析。结果:轻度磨耗组咬合接触区域的重叠率为(86.68±1.41),中度磨耗组的咬合接触区域的重叠率为(87.60±2.06),中度磨耗组的咬合接触区域重叠率较高,采用Wilcoxon秩和检验分析发现差异具有统计学意义(P<0.05)。结论:CEREC Omnicam椅旁系统对轻度、中度磨耗牙齿的口内光学印模咬合接触的精确性均较高,牙齿磨耗对口内光学印模的咬合接触精确性存在一定的影响。
Objective:To study the effect of different abrasion degree on the accuracy of occlusal contact of optical impression made by CEREC Omnicam chair system.Methods:From December 2016 to June 2017 in patients who visited affiliated Stomatological Hospital of Nanchang University,84 mandibular first molar teeth were selected as the research object according to the inclusion criteria,including 41 teeth at mild abrasion and 43 teeth at moderate abrasion.CEREC Omnicam chairside system was used to make intraoral optical impression of occlusal contacts.Canon EOS 60 DSLR camera was used to record the mouth bite mark image.The overlap rate of the occlusal contact area was calculated and the accuracy of the occlusal contacts of the optical impression was evaluated.Results:The average overlap rates of occlusal contact area in mild abraion group and moderate abraion group were(86.68±1.41)and(87.60±2.06),respectively(P<0.05).Conclusion:The accuracy of occlusal contact of intraoral optical impression of CEREC Omnicam chairside system was high for both mild and moderate wear teeth.Tooth wear has a certain influence on the accuracy of impression.
Objective:To study the effect of different abrasion degree on the accuracy of occlusal contact of optical impression made by CEREC Omnicam chair system.Methods:From December 2016 to June 2017 in patients who visited affiliated Stomatological Hospital of Nanchang University,84 mandibular first molar teeth were selected as the research object according to the inclusion criteria,including 41 teeth at mild abrasion and 43 teeth at moderate abrasion.CEREC Omnicam chairside system was used to make intraoral optical impression of occlusal contacts.Canon EOS 60 DSLR camera was used to record the mouth bite mark image.The overlap rate of the occlusal contact area was calculated and the accuracy of the occlusal contacts of the optical impression was evaluated.Results:The average overlap rates of occlusal contact area in mild abraion group and moderate abraion group were(86.68±1.41)and(87.60±2.06),respectively(P<0.05).Conclusion:The accuracy of occlusal contact of intraoral optical impression of CEREC Omnicam chairside system was high for both mild and moderate wear teeth.Tooth wear has a certain influence on the accuracy of impression.
引文
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[2]Muller HC.Registration of occlusion by buccal scan in Cerec software version 3.80[J].Int J Comput Dent,2010,13(3)∶265-273
[3]Smith BG,Knight JK.An index for measuring the wear of teeth[J].Br Dent J,1984,156(12)∶435-438
[4]陈霜,王美青,刘晓东,等.急、慢性咬合干扰致雌性大鼠咀嚼肌痛觉敏感的研究[J].口腔医学研究,2008,24(3)∶248-251
[5]蔡长安,张丽.咬合干扰对大鼠髁突软骨细胞内质网应激及凋亡的影响[J].口腔医学研究,2015,31(1)∶23-26
[6]Dzingute A,Pileicikiene G,Baltru2aityte A,et al.Evaluation of the relationship between the occlusion parameters and symptoms of the temporomandibular joint disorder[J].Acta Med Litu,2017,24(3)∶167-175
[7]Turp JC,Greene CS,Strub JR.Dental occlusion:a critical reflection on past,present and future concepts[J].J Oral Rehabil,2008,35(6)∶446-453
[8]王惠芸,陈一怀,刘继光,等.生理性牙合接触点的计算机图像分析[J].实用口腔医学杂志,1997,13(1)∶37
[9]Lilakrasniqi Z,Shala K,Krasniqi TP,et al.Differences between Subjective Balanced Occlusion and Measurements Reported With T-ScanⅢ[J].Open Access Maced J Med Sci,2017,5(5)∶667-672
[10]Wang YL,Cheng J,Chen YM,et al.Patterns and forces of occlusal contacts during lateral excursions recorded by the TScanⅡsystem in young Chinese adults with normal occlusions[J].J Oral Rehabil,2011,38(8)∶571-578
[11]Yamashita S,Igarashi Y,Ai M.Tooth contacts at the mandibular retruded position,comparison of two different methods for bite registration[J].J Oral Rehabil,2002,29(9)∶823-826
[12]Kontaxopoulou I,Alam S.Risk assessment for tooth wear[J].Prim Dent J,2015,4(3)∶25-29
[13]Shellis RP,Addy M.The interactions between attrition,abrasion and erosion in tooth wear[J].Monogr Oral Sci,2014,25(6)∶32-45
[14]O'Toole S,Mullan F.The role of the diet in tooth wear[J].Br Dent J,2018,224(5):379-383
[15]连梅菲,冯云枝.牙列磨耗对口颌系统影响的研究进展[J].口腔医学研究,2017,33(2)∶228-230
[16]Maier W.Schneck G.Construction morphologic examinations of the dentition of hominoid primates[J].Z Morphol Anthropol,1981,72(2)∶127-169
[17]Dmd WR,Dinstructor RK.Evaluation of the marginal fit of CAD/CAM crowns fabricated using two different chairside CAD/CAM systems on preparations of varying quality[J].J Esthet Restor Dent,2015,27(4)∶194-202
[18]Kurz M,Attin T,Mehl A.Influence of material surface on the scanning error of a powder-free 3D measuring system[J].Clin Oral Investig,2015,19(8)∶2035-2043
[19]Yuzbasioglu E,Kurt H,Turunc R,et al.Comparison of digital and conventional impression techniques:evaluation of patients'perception,treatment comfort,effectiveness and clinical outcomes[J].BMC Oral Health,2014,14(1)∶10
[20]Nemli SK,Wolfart S,Reich S.InLab and Cerec Connect:virtual contacts in maximum intercuspation compared with original contacts--anin vitro study[J].Int J Comput Dent,2012,15(1)∶23-31
[21]Mennito AS,Evans ZP,Lauer AW,et al.Evaluation of the effect scan pattern has on the trueness and precision of six intraoral digital impression systems[J].J Esthet Restor Dent,2018,30(2):113-118
[22]Tapie L,Lebon N,Mawussi B,et al.Understanding dental CAD/CAM for restorations--accuracy from a mechanical engineering viewpoint[J].Int J Comput Dent,2015,18(4)∶343-367
[23]Nedelcu RG,Persson AS.Scanning accuracy and precision in4intraoral scanners:an in vitro comparison based on 3-dimensional analysis[J].J Prosthet Dent,2014,112(6)∶1461-1471