正畸中年龄因素对于牙根吸收的影响与牙根吸收好发牙位的分析

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1、结论当日，匕正畸治疗可引起牙根吸收；年龄因素对牙根吸收有影响，成人患者的牙根吸收率大于儿童患者。上下前牙各牙位牙根吸收发生率不同，其好发顺序由高到低是：上中切牙、上侧切牙、下中切牙、下侧切牙、上尖牙、下尖牙；中、重度的牙根吸收易发生在成年人的上中、侧切牙。关键词牙根吸收；全颌曲面断层片；正畸2●英文论著摘要OrthodonticsintheAgefactorforRootResorptionandRootResorptionofPreferredTeethobjectiveToevaluatetheimpactofroo

2、tresorptionintheagefactorandtoresearchthepredilectionofanteriorteeth．Theaimofthisarticleistoprovidethereferencesfortheclinicalplanoforthodontictreatment．Methods60casestreatedwithstraightwireappliancewerechosenfromtheDepartmentofOnhodonticsinstomatologicalhospital

3、ofChinaMedicalUniversityinnearly5years·Thevweredividedintoadultsandchildrengroupsby18yearsold，andtherewere30personsineachgroup．ThepanoramicradiographsbeforeandaftertreatmentwereeX锄ined．WeusedLevanderandMalmgrenerootabsorptiondegreestomeasuretherootdegreesofanteri

4、orteethbeforeandafterorthodontictreatment，andcalculatedtherootabsorptiondegree(therootabsorptiondegree2rootdegreebeforetreatment——rootdegreeaftertreatment)，theincidenceofeachtooth、rootresorptionaftertreatment，incr锄entofrootresorptiontocontrasttherootadsorptionlev

5、elofeachtooth．ThesonwareSPSS13．0Wasusedfornonparametricstatisticalanalysisinthefrequencyofrootdegreechanging．ResultsRootresorptionoccurredinthe60orthodonticpatients．Theroot-tipsshowed：merew懿significantdifferenceintwogroupsbetweenbefore-treatmentand啦er-treatnlent(

6、P．<0．O1)；TherootresorptioninadultsgroupWasmoreobvious．Therewaussignificantdifferenceintwogroupsbetweenadultgroupandchildrengroup3衅O．01)．Rootresorptionincidenceratesteppedupobviouslyafterorthodontictreatment．Thepredilectionofrootresorptioninupperandloweranteriorte

7、ethwasdifferent．Theorderfromhightolowwas：UPPercentralincisor,upperlateralincisor,lowercentralincisor，lowerlateralincisor,uppercanineteeth，lowercanineteeth．ConclusionsRootresorptionWasamajorcomplicationinorthodontictreatment；Inorthodontictreatment，theagefactorWasp

8、ositivelycorrelatedwithrootadsorption．Rootresorptionrateofadultpatientsishigherthanchildrenpatients．Thepredilectionofrootresorptioninupperandloweranteriorteeth