全景和根尖片对正畸相关牙根吸收诊断准确性探究［摘要］目的以CBCT对样本牙根吸收的诊断结果为金标准，检验全景片（OPG）及根尖片对正畸相关牙根吸收（RRAOF）定性及分级半定量诊断结果的准确性。方法纳入完成固定正畸治疗的32例患者的121颗上前牙，正畸治疗前后均拍摄OPG、上前牙根尖片、上前牙CBCTo由3名放射专科医生按照LevanderandMalmgren分度法对纳入样本的3种图像的牙根吸收程度分别进行评估，并以CBCT的诊断结果为金标准，检验OPG及根尖片对相同样本牙根吸收定性及分级半定量诊断结果的准确性。结果OPG、根尖片对相同样本RRAOF的定性及分级半定量诊断结果，与CBCT相比较均存在统计学差异（P<0.05）b根尖片和OPG对RRAOF定性诊断的敏感性分别为71.6%和78.4%,特异性分别为25.5%和5行％准确度分别为53.7%和67.8%。结论根尖片与OPG对正畸相关牙根吸收的诊断准确性较差。［关键词］正畸相关牙根吸收；全景片；根尖片；锥形束CT［中图分类号］R783.5［文献标志码］A［doi］10.3969/j.issn.1000-1182.2012.02.014DiagnosticaccuracyoforthopantomogramandperiapicalfilminevaluatingrootresorptionassociatedwithorthodonticforceYuLixia,HeShushu,ChenSong.(Dept,ofOrthodontics,WestChinaSchoolofStomatology,SichuanUniversity,Chengdu610041,China)[Abstract]ObjectiveTotestthediagnosticaccuracyofqualitativeandsemi-quantitativeevaluationsonrootre-sorptionassociatedwithorthodonticforce(RRAOF)usingorthopantomogram(OPG)andperiapicalfilm,throughcomparingwithassessmentswithconebeamcomputedtomography(CBCT),whichisconsideredasthegoldstandard・MethodsBeforeandaftertreatment,OPG,periapicalfilm,CBCTimagesof121upperanteriorteethin32orthodonticpatientswereobtained.BlindevaluationofRRAOFwasperformedaccordingtoLevanderandMalmgren5smethodbythreetrainedradiographersthroughexaminingthreekindsofimagesoftheseteeth.Thediagnosticaccuracyofqualitativeandsemi-quantitativeevaluationsonRRAOFusingOPGandperiapicalfilmsweretestthroughcomparingwithassess-mentswithCBCT,whichwasconsideredasthegoldstandard・ResultsTothesamesample,theRRAOFqualitativeandsemi-quantitativediagnosticclassificationresultsofOPGandperiapicalfilmscomparedwithCBCTweresignificantdifference^P<0.05〉ThesensitivityofperiapicalfilmsandOPGwas71.6%and78.4%.ThespecificityofperiapicalfilmsandOPGwas25.5%and51.1%・TheaccuracyofperiapicalfilmsandOPGwas53.7%and67.8%,respectively.ConclusionPeriapicalfilmsandOPGforevaluatingRRAOFhaveapoordiagnosticaccuracy.[Keywords]rootresorptionassociatedwithorthodonticforce;orthopantomogram;periapicalfilm;conebeamcomputedtomography正畸相关牙根吸收(rootresorptionassociatedwithorthodonticforce,RRAOF)是伴随正畸牙移动而产生的一种比较常见的、不可预知的并发症口］。目前在正畸临床研究中多采用全景片(orthopantomogram,OPG)或根尖片来定性或分级半定量评估RRAOFoOPG虽然定位较好但是由于与气道等结构重叠，对牙根观
