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Volume2 Issue8
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S
upporting
Y
our
P
ractice
abutments. Thecement seal of thenatural toothmaybecompromised
as it experiencesmovementwith loadingandas such, there is a risk
of recurrent decayaswell as intrusion. Additionally, the rigid implant
connector nowhas acantileverwhich increases the forceon thebone-
implant interfaceandabutment screw.
Ingeneral, anterior teethare less suitableabutments as they
oftenexhibitmoremobility than is tolerableby the rigid implant.
Furthermore, any lateral forces applied to theprosthesisduringexcursive
movements are translated toboth thenatural teethand implants. In
these situations, theuseof anon-rigidconnector (e.g., semi-precision
attachments)maybeconsidered. However, this is associatedwitha
higher cost for thepatient.
a
THEAUTHORS
Dr.NatalieWong
Dr.Wongmaintains a
private implant surgical
and prosthodontic practice
inToronto. She is currently
president of theAssociation
of Prosthodontists ofOntario
and is a past president of
theAmericanBoard of
Oral Implantology/Implant
Dentistry.
Dr.SuhamAlexander
Dr.Alexander is in private
practice inOttawaand is
a clinical editor forOasis
Discussions atCDA.
Needexpertadvice?Send
usyourclinicalquestions.
or
1-855-71-OASIS
Advantages
Disadvantagesof teeth-implantprosthesis
•
Tactileperception forpatient:
increased comfort chewing
andefficiency
•
Avoidvital anatomical structures
•
Cost
•
Chancegraft is required
•
Betterpatient acceptance
•
Riskof intrudingnatural tooth
•
Biomechanical Issues:
•
Fixture-abutment failure
•
Implant fracture
•
Looseningof screw
•
Cement failure
•
Tooth fracture
•
Decayof tooth
•
Crown fracture
•
Natural Tooth Issues:
•
Endodontic and/or periodontal involvement
•
Fracture
•
Decay
•
Peri-implantitis
Sources
1.DavisSM,Plonka,AB,WangHL.Risksandbenefitsofconnectingan
implantandnaturaltooth. ImplantDent.2014;23(3):253-7.
2.Misch,CE.Dental ImplantProsthetics,2ndEdition.ElsevierMosby.2015.
3.CheeWW,Mordohai,N.Tooth-to-implantconnection:asystematic
reviewofthe literatureandacasereportutilizinganewconnection
design.Clin ImplantDentRelatRes.2010;12(2):122-33.
4.WeberHP,ZimeringY.Survivalandcomplicationratesoffixed
partialdenturessupportedbyacombinationofteethand implants.
JEvidBasedDentPract.2012;12(3Suppl):215-6.
Table1:
Teeth-implantprosthesis: advantagesanddisadvantages
