Evaluation of relapse with thermoplastic retainers equipped with microsensors 2022 Sait ?shako?lu.pdf

该【Evaluation of relapse with thermoplastic retainers equipped with microsensors 2022 Sait ?shako?lu 】是由【住儿】上传分享，文档一共【7】页，该文档可以免费在线阅读，需要了解更多关于【Evaluation of relapse with thermoplastic retainers equipped with microsensors 2022 Sait ?shako?lu 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。OriginalArticle
Evaluationofrelapsewiththermoplasticretainersequippedwith
microsensors
Sait˙Ishakoglu˘a;SerpilCokako¸glu˘b
Downloadedfrom-orthodontist/article-pdf/92/3/340/3045215/i1945-7103-92-3-
ABSTRACT
Objectives:Toexaminerelapsewiththermoplasticretainersequippedwithmicrosensors1year
aftertreatment.
MaterialsandMethods:Atotalof42patients(29females,13males)treatedwithfourpremolar

microsensors(HandelsagenturGschladt,Hargelsberg,Austria)wereusedtoassessdailywear
time(DWT),andthepatientsweremonitoredat2-
endofthefollow-up,thefollowingtwogroupswereformedbasedonthemeanDWT:shortwear
time(SWT;,9h/d)andlongweartime(LWT;9h/d).Digitalmodelswereconstructedbefore
treatment(T0),atdebonding(T1),and6months(T2)and12months(T3)’s
IrregularityIndex(LII)andtheintercanineandintermolarwidths,archlengths,overjet,andoverbite
.
Results:Irregularityandoverjetincreased,whereastransversemeasurementsandarchlengths
,overbitedecreasedintheSWT


LWTgroupfortheT1–T2andT1–T3timeintervals(P,.05).
Conclusions:AmeanDWTlessthan9hours/daywasinadequateforcontrollingirregularitywithin

mandibularanterioralignment.(;92:340–346.)
KEYWORDS:Microsensor;Relapse;Stability
INTRODUCTIONcomfort,andcost-,weartime
basedonpatientcooperationisthemaindrawbackof
Relapsecanoccurinapproximately70%ofcases
removableretainers.

Thesuccessofretentionwithremovableappliances
maintainsatisfactoryalignmentintheposttreatment
dependsonpatientcompliancewithinstructedwear
periodiswithlong-termuseoffixedorremovable
time,andremovableretainerwearcanbeevaluated
,itisessentialthatcliniciansfully
,weartimecanbe
understandtheetiologyofrelapseandtakeinto
objectivelymeasuredbythermosensitivemicrosensors
accounttheadvantagesanddisadvantagesofvarious

-
purpose,theTheraMonmicrosensor(Handelsagentur
plasticretainershavetheadvantagesofesthetics,
Gschladt,Hargelsberg,Austria)iscommonlyused

a
PrivatePractice,Denizli,
bAssistantProfessor,DepartmentofOrthodontics,Facultyof
Dentistry,PamukkaleUniversity,Denizli,
Correspondingauthor:DrSerpilCokako¸glu,˘AssistantProfes-–13
sor,DepartmentofOrthodontics,FacultyofDentistry,Pamuk-Thepublisheddataregardingstabilityarebasedon
kaleUniversity,20160Denizli,Turkeysubjectivewear-timemeasuressuchaspatientand
(e-mail:******@)
–23Al-
Accepted::August2021.
PublishedOnline:January25,2022thoughweardataaresubjective,part-timeretainer
Ó2022byTheEHAngleEducationandResearchFoundation,wear(8–12h/d)isreportedtobeasbeneficialasfull-
–18,20Never-
AngleOrthodontist,Vol92,No3,2022340DOI:-
RELAPSEWITHRETAINERSEQUIPPEDWITHMICROSENSORS341
theless,thesefindingsneedtobeverifiedbecauseof
thesubjectivemeasurementsoffull-timeorpart-time
,afewstudiesincludingfour-premolar
extractioncaseshaveemphasizedtheeffectsof
,17,22
Onlyonepreviousstudyassessedstabilityout-

However,thequestionofwhethershortweartimes
(SWTs)orlongweartimes(LWTs)areeffectiveforthe
-Downloadedfrom-orthodontist/article-pdf/92/3/340/3045215/i1945-7103-92-3-
fore,theaimofthisstudywastodeterminehowthe
amountofobjectivelymeasuredretainerwearaffects
.
,thenull
hypothesistestedwasthattherewouldbeno
patientswerenotinformedthattheirDWTwasbeing
differenceinstabilitybetweenretainerSWTsand
monitoredduringthisinvestigation.
LWTs.
Stabilitymeasurements,includingLittle’sIrregularity
Index(LII),24andtheintercanineandintermolarwidths,
MATERIALSANDMETHODS
archlength,overbite,andoverjetwereperformedwith
Thisprospective,single-centerstudywasapprovedOrthoAnalyzer(3Shape,Copenhagen,Denmark)soft-
bytheEthicsCommitteeofPamukkaleUniversity(-dimensionaldigitalmodelsconstructed
).Informedconsentwasobtainedfromallbeforetreatment(T0),atdebonding(T1),6months
(;IBM,afterdebonding(T2),and12monthsafterdebonding
Armonk,.)showedthat34patientswouldgive(T3).LIIwasmeasuredasthesumofthedistances
morethan80%poweratthe95%confidencelevelwithbetweentheanatomiccontactpointsfromthemesial
amediumeffectsize(r¼).Morepatientswereaspectoftheleftcaninethroughthemesialaspectof
,
Atotalof47patients(31femalesand16males)overjet,andoverbiteweremeasuredasdescribedby

onthefollowingcriteria:(1)completionoffixedparabolathatcontouredfromthemesialcontactofthe
orthodontictreatmentwithfourpremolarextractions,leftfirstpermanentmolartothecorrespondingpointon
(2)goodfinalocclusionandoralhygiene,(3)notheothersidebypassingthroughtheincisaledgesof
25
missingteeth,(4)
˙
retainer(ie,midlinediastemaorsevererotationsbeforethesameresearcher(DrIshakoglu)˘on14randomly
treatment),and(5)samebracketsystem(-inchselectedpatientrecordstodetermineintraobserver
MBT,AmericanOrthodontics,Sheboygan,WI,USA).reliability1monthlater.
Theexclusioncriteriawere(1)agenesis,(2)cleftlipor
palate,(3)surgicaltreatment,and(4)needforStatisticalAnalysis
(version25;IBM
AllpatientsreceivedupperandlowerthermoplasticCorp.).Theindependent-samplest-testwasusedto
-mmthickEssixAþ(DentsplycomparethemeanDWT,age,andstabilityparameters
RaintreeEssix,Sarasota,FL,USA)
appliancewasintegratedwithaTheraMonmicro-
sensor(HandelsagenturGschladt)toassessthedailytimewerecomparedwithrepeated-measuresanalysis
weartime(DWT).
intotherightpalatalsideoftheupperrightbuccalsideassessedbyintraclasscorrelationcoefficient(ICC).
ofthelowerappliances(Figure1).ThelevelofsignificancewassetatP,.05.
Thepatientswereinstructedtoweartheappliance
foratleast20–22h/d(exceptduringmeals)foraperiodRESULTS
of1year,,21Duringthisstudy,
ActualWearTimeandGroupCharacteristics
every8weeks,thedatacollectedbyeachsensorwere

-up,themeanDWTwash/,theparticipantsweredivided
(DWT,9h/d)andLWTgroup
AngleOrthodontist,Vol92,No3,2022
342˙ISHAKOG˘LU,COKAKOG¸˘LU

GroupSWT(n¼20)GroupLWT(n¼22)PValue
DWT,()().001*
Age,()().175
Sex,n
Male6(30)7(32)
Female14(70)15(68)
Changes,T0–T1
Maxillaryirregularity,()().430
Mandibularirregularity,()().781
MaxillaryICW,mmÀ()().147Downloadedfrom-orthodontist/article-pdf/92/3/340/3045215/i1945-7103-92-3-
MandibularICW,()À().349
MaxillaryIMW,()().151
MandibularIMW,()().060
Maxillaryarchlength,()().052
Mandibulararchlength,()().334
Overbite,mmÀ()().132
Overjet,()().255
aSWT¼DWT,9h/d;LWT¼DWT9h/;IMW,intermolarwidth.
*P,.05.
(DWT9h/d),,archlength,overjet,or
,(P..05;Table1).
Duringthefollow-upperiod,fivepatientsdroppedout
IntraobserverReliability
ofthestudybecauseofpatientrequests(2females),
lossofappliances(2males),andunavailablewear-Thestabilitymeasurementswererepeatedonfour
timedata(1female),leaving20patientsintheSWToccasionsanddemonstratedexcellentreliability,with
.

T0–T1timeintervalshowednosignificantdifferencesMaxillaryStabilityMeasurements
betweenthegroupsinmaxillaryandmandibularLII,
Intragroupevaluationshowedthat,intheSWT
,asignificantincreaseoccurredinmeanLIIover
GroupsandTimesatime(P,.001;Table2);however,nosignificant

widthssignificantlydecreasedinbothgroupsover
SWTLWTPValue
,archlengthsignificantly
LII,mmdecreasedwithtime(P,.001;Table2);however,


.
Pvalue,.001*.051Intergroupevaluationshowedthattherewereno
ICW,mmsignificantdifferencesbetweenthegroupsinmaxillary


(P..05;Table2).
Pvalue,.001*,.001*
IMW,mmMandibularStabilityMeasurements

,inbothgroups,

*.016*
Archlength,mmwidthsignificantlydecreasedwithtime(P,.001).In
,intermolarwidthsignificantlyde-
(P¼.009).Similarchangeswere
(P,.001;Table3).However,
Pvalue,.001*.051intheSWTgroup,nonsignificantdecreasesinthese
.
bA–C:nodifferencebetweentimeswiththesameletterineach
¼DWT,9h/d;LWT¼DWT9h/
*P,.
AngleOrthodontist,Vol92,No3,2022
RELAPSEWITHRETAINERSEQUIPPEDWITHMICROSENSORS343

BetweenGroupsandTimesaGroupsandTimesa
GroupbGroupb
SWTLWTPValueSWTLWTPValue
LII,mmOverbite,mm

*
*
Pvalue,.001*,.001*
ICW,mmOverjet,mm
Downloadedfrom-orthodontist/article-pdf/92/3/340/3045215/i1945-7103-92-3-



Pvalue,.001*,.001*,.001*
IMW,mm
a6
ADataareprovidedasmeanstandarddeviation.
–C:nodifferencebetweentimeswiththesameletterineach
AB
¼DWT,9h/d;L