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UDC: 616.314-076
ASSESSMENT OF THE ANATOMICAL AND FUNCTIONAL CONDITION OF THE
ORAL CAVITY
E gashe Bekzod1
Ro‘zma o a Sa a axon Salimjono na2
Cen al Asian Medical Uni e si y In e na ional Medical Uni e si y, Bu honiddin Ma g‘inoniy
S ee -64, Phone: +998 95 485 00 70, Email: in o@camu .uz, Fe gana, Uzbekis an1,2
Email: aliye ama [email protected]
Email: ozma o asa a [email protected]
O cid: h ps://o cid.o g/0009-0005-7472-77411
h ps://doi.o g/10.5281/zenodo.17739422
Abs ac . Long- e m use o non- emo able den al p os heses ep esen s a signi ican
clinical and biological ac o in luencing he ana omical and unc ional s a e o he o al ca i y.
Con inuous in e ac ion be ween p os he ic s uc u es and o al issues g adually al e s
biomechanical load dis ibu ion, mucosal in eg i y, pe iodon al condi ions, and neu omuscula
esponses. This heo e ical e iew a icle syn hesizes indings om con empo a y li e a u e o
p o ide a comp ehensi e analysis o how p olonged use o ixed p os heses a ec s ha d and so
o al issues, sali a y pa ame e s, occlusal dynamics, and o al mo o unc ion. The e iew
highligh s he mechanisms h ough which p os he ic ma e ials, design quali y, and o al hygiene
p ac ices in luence issue adap a ion o de e io a ion. Special a en ion is gi en o
mo phological changes in he gingi a, al eola bone emodeling, p os hesis-induced plaque
e en ion, and shi s in occlusal unc ion. Fu he mo e, he a icle discusses long-s anding
p os he ic- unc ional co ela ions, including muscle coo dina ion, mas ica ion e iciency,
phone ics, and empo omandibula join esponses. The e iew emphasizes he impo ance o
ea ly de ec ion o p os hesis- ela ed complica ions h ough egula clinical examina ions and
unc ional assessmen p o ocols. Ul ima ely, his pape unde sco es he need o e idence-based
p os hodon ic planning, main enance s a egies, and pa ien educa ion o p ese e op imal o al
unc ion o e ex ended pe iods o p os hesis use.
Keywo ds: ixed p os heses, o al ca i y, long- e m use, ana omy, unc ion, occlusion,
mucosa, adap a ion, pe iodon ium, biomechanics.
In adac ion: Non- emo able den al p os heses, o en e e ed o as ixed p os hodon ic
cons uc ions, play a cen al ole in es o ing mas ica ion, aes he ics, and phone ics o
indi iduals wi h pa ial o comple e oo h loss. O e he pas decades, signi ican imp o emen s
in p os he ic ma e ials, adhesi e echnologies, and design me hodologies ha e expanded he
du abili y and unc ional e iciency o ixed es o a ions. Howe e , long- e m placemen o hese
p os heses does no me ely se e a es o a i e pu pose—i becomes a de e minan o s uc u al
and unc ional changes wi hin he o al ca i y. The o al en i onmen is dynamic and con inuously
adap s o mechanical loads, mic obial in e ac ions, and chemical in luences. In oducing a
pe manen p os he ic s uc u e al e s his equilib ium, igge ing a spec um o adap i e and
some imes ad e se ana omical ans o ma ions.
Unde s anding hese changes is essen ial o clinicians, no only o op imize p os hesis
longe i y bu also o main ain a heal hy o al ecosys em. The ana omical and unc ional condi ion
o he o al ca i y is in luenced by mul iple in e ela ed ac o s, including p os he ic design,
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ma ginal i , occlusal ela ionships, o al hygiene quali y, sali a y low, and he pa ien ’s
beha io al pa e ns. Long- e m use ampli ies he consequences o hese a iables. While many
pa ien s ole a e ixed p os heses well, s udies indica e inc eased isk o gingi al ecession,
plaque accumula ion, enamel wea o an agonis ee h, pe iodon al pocke o ma ion, and
modi ica ions in al eola bone mo phology when p os he ic s uc u es emain in place o
ex ended du a ions.
These changes a e no solely con ined o ha d issues. The so issues—pa icula ly he
gingi a, al eola mucosa, and o al muscula u e—unde go unc ional adap a ion as he
biomechanical balance shi s. Al e ed occlusal schemes may in luence neu omuscula unc ion,
leading o compensa o y mo emen s du ing mas ica ion and phona ion.
Mo eo e , he p os hesis can modi y he mic o-ecological en i onmen , p o iding a mo e
e en i e niche o mic obial bio ilm o ma ion. Consequen ly, long- e m plaque e en ion is
associa ed wi h inc eased in lamma ion, po en ial ca ies a es o a ion ma gins, and localized
pe iodon al impai men .
Despi e he ex ensi e clinical ele ance, he e emains a con inued need o s uc u ed
heo e ical analysis o he long- e m e ec s o non- emo able p os heses. Much o he a ailable
da a o igina es om obse a ional s udies, clinical epo s, and expe imen al models assessing
p os hesis- issue in e ac ions. Syn hesizing his in o ma ion in a comp ehensi e heo e ical
con ex p o ides clinicians and esea che s wi h deepe insigh s in o expec ed adap i e
esponses, po en ial complica ions, and p e en i e s a egies.
The p esen a icle aims o e alua e he ana omical and unc ional condi ions o he o al
ca i y in indi iduals who use ixed p os heses o p olonged pe iods, d awing exclusi ely on
es ablished heo e ical amewo ks and li e a u e e iews. By examining biomechanical
in luences, issue esponses, p os he ic-ma e ial in e ac ions, and long- e m unc ional
adap a ions, his s udy p o ides an in-dep h unde s anding o how non- emo able p os heses
con ibu e o s uc u al and unc ional ans o ma ions. Emphasis is placed on explaining
mechanisms unde lying mucosal changes, pe iodon al dynamics, occlusal modi ica ions, and
neu omuscula adap a ion. Addi ionally, he e iew add esses he ole o o al hygiene p ac ices
and p os hesis main enance in mi iga ing nega i e ou comes.
Th ough his heo e ical lens, he a icle seeks o suppo clinicians in making e idence-
based decisions on p os hesis planning, long- e m ollow-up, and pa ien educa ion. The
syn hesis con ibu es o ad anced p os hodon ic knowledge and unde sco es he need o
con inuous esea ch in o bioma e ial de elopmen , p os hesis– issue in e ac ion, and unc ional
p ese a ion s a egies in long- e m p os he ic use s.
Ma e ials and Me hods: The objec i e o his heo e ical e iew is o analyze exis ing
scien i ic li e a u e ela ed o he long- e m ana omical and unc ional e ec s o non- emo able
den al p os heses. As no clinical subjec s o expe imen al ma e ials we e used, he “ma e ials” in
his con ex e e p ima ily o schola ly sou ces, concep ual models, p os hodon ic heo ies, and
analy ical c i e ia used o syn hesize da a. The me hodological s uc u e is o ganized a ound
sys ema ic li e a u e e alua ion, hema ic classi ica ion, and heo e ical in e p e a ion.
1. Li e a u e Sea ch S a egy: The e iew elies on in o ma ion collec ed h ough
es ablished scien i ic da abases such as PubMed, Scopus, Web o Science, and Google Schola .
Sea ch e ms included “ ixed den al p os heses,” “long- e m p os hesis use,” “o al ca i y
ana omy,” “p os he ic biomechanics,” “pe iodon al changes,” “mas ica o y unc ion,” “so
issue esponse,” and “occlusal adap a ion.”
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Only pee - e iewed a icles, academic books, and au ho i a i e clinical guidelines
published wi hin he las wen y- i e yea s we e conside ed o ensu e ele ance. Classical
p os hodon ic ex s we e included selec i ely when ounda ional concep s we e equi ed o
suppo heo e ical in e p e a ions.
S udies in ol ing emo able den u es, implan -suppo ed ull-a ch p os heses, pedia ic
popula ions, o sho - e m e alua ions (<6 mon hs) we e excluded. Inclusion c i e ia equi ed
ha s udies p o ide heo e ical indings, gene alizable concep s, o s uc u ed clinical
obse a ions ela ed o he long- e m e ec s o ixed p os he ic es o a ions.
2. Theo e ical Models U ilized: Th ee p ima y heo e ical amewo ks guided syn hesis:
a. Biomechanical adap a ion heo y:
This model explains how o ces gene a ed du ing mas ica ion, pa a unc ion, and speech
exe in luence on o al s uc u es, po en ially leading o mo phological changes o e p olonged
pe iods.
b. Tissue esponse heo y:
This heo y assesses how o al so and ha d issues (gingi a, mucosa, pe iodon al
ligamen , al eola bone) espond o con inuous mechanical o mic obial s imuli p oduced by
p os he ic s uc u es.
c. Func ional compensa ion heo y:
This model in e p e s changes in neu omuscula coo dina ion, chewing cycles, occlusal
pa hways, and empo omandibula join ac i i y ha a ise in esponse o al e ed ana omical
ela ionships induced by p os heses.
Each o hese amewo ks con ibu ed o s uc u ed in e p e a ion o he li e a u e.
3. Me hods o Analysis and Ca ego iza ion:
The li e a u e was ca ego ized in o he ollowing hemes:
1. Mo phological changes in ha d issues – enamel wea , al eola bone emodeling, oo
su ace changes.
2. So issue esponses – gingi al ecession, mucosal hype plasia, in lamma o y
mani es a ions.
3. Occlusal and unc ional adap a ion – changes in occlusal loading, mas ica ion
e iciency, muscle coo dina ion.
4. P os hesis–bio ilm in e ac ion – plaque accumula ion, mic obial shi s, pe iodon al
consequences.
5. Ma e ial- issue compa ibili y – biocompa ibili y o me als, ce amics, composi es, and
cemen s.
6. Long- e m s abili y and complica ions – ac u e, debonding, ma ginal leakage, and
unc ional de e io a ion.
Each hema ic a ea was e iewed sys ema ically, and indings we e concep ually
in eg a ed.
4. Syn hesis Me hodology:
Due o he heo e ical na u e o he s udy, syn hesis in ol ed:
Compa ing concep ual simila i ies ac oss mul iple sou ces
Ex ac ing consensus s a emen s
Iden i ying ecu ing pa e ns in issue-p os hesis in e ac ions
E alua ing long- e m adap i e p ocesses desc ibed in he li e a u e
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Fo mula ing a uni ied heo e ical pe spec i e ega ding ana omical and unc ional
ou comes
Quali a i e compa a i e analysis (QCA) was used as he p ima y in eg a i e me hod,
allowing iden i ica ion o causal ela ionships and consis en heo e ical ends.
5. Bias Reduc ion Measu es: Al hough no empi ical da a we e collec ed, he ollowing
measu es helped educe in e p e i e bias:
Use o mul iple independen p os hodon ic esou ces o alida e concep s
C oss- e e encing be ween classic and mode n sou ces
A oiding conclusions no suppo ed by es ablished heo y
Emphasizing consis ency ac oss me a-analyses and sys ema ic e iews
6. E hical Conside a ions: As his a icle is based solely on li e a u e and does no
in ol e human subjec s, e hical app o al was no equi ed. Ne e heless, e hical esea ch
guidelines we e adhe ed o by ensu ing accu a e ci a ions, a oidance o plagia ism, and
anspa en epo ing.
Resul s: The li e a u e analysis e eals se e al co e ou comes ega ding he ana omical
and unc ional condi ion o he o al ca i y in indi iduals using non- emo able p os heses o
p olonged du a ions. These esul s a e o ganized in o i e majo domains.
1. Mo phological Changes in Ha d Tissues: Long- e m placemen o ixed p os heses
a ec s enamel, den in, and al eola bone a chi ec u e. An agonis ee h o en exhibi measu able
enamel wea due o al e ed occlusal dynamics and inc eased ic ional con ac . S udies
consis en ly epo sligh bu p og essi e changes in al eola bone densi y a ound abu men
ee h, a ibu able o edis ibu ed biomechanical s ess. Ma ginal bone loss is mo e p onounced
when p os he ic i is inadequa e, leading o mic oleakage and ch onic in lamma ion.
2. So Tissue Responses: So issues demons a e high adap i e capaci y bu emain
suscep ible o pa hological shi s. Gingi al ecession, pa icula ly a ound c owns and b idges, is
equen ly ci ed as a long- e m complica ion. Ch onic i i a ion om imp ope ly con ou ed
ma gins may lead o mucosal hickening o hype plasia. Li e a u e indica es ha p ecision in
ma gin placemen c i ically de e mines issue s abili y; subgingi al ma gins pose highe isk o
in lamma o y changes.
3. P os hesis-Bio ilm In e ac ion: Due o hei non- emo able na u e, ixed p os heses
c ea e mic o-niches conduci e o plaque e en ion. A consis en inding is ha p os heses
con ibu e o al e a ions in mic obial composi ion, a o ing pa hogenic species associa ed wi h
gingi i is and pe iodon i is. O e ime, ma ginal leakage can exace ba e bio ilm accumula ion,
leading o seconda y ca ies a ound he es o a ion ma gins. The isk inc eases subs an ially
wi hou s ic hygiene p o ocols.
4. Func ional Adap a ion and Neu omuscula Changes: Long- e m p os he ic use
eshapes unc ional dynamics o he o al ca i y. Pa ien s ypically exhibi changes in mas ica ion
pa e ns as hey adap o he modi ied occlusal scheme. Li e a u e sugges s ha mas ica ion
cycles may become sho e o mo e unila e al depending on p os hesis design. Addi ionally,
p olonged use can esul in muscle hype unc ion o a igue due o al e ed loading and
compensa o y mo emen s. In some cases, empo omandibula join symp oms may de elop i
occlusal disc epancies emain unco ec ed.
5. O e all Long-Te m S abili y and Complica ions: Al hough ixed p os heses a e
designed o du abili y, hei long- e m success depends on mul iple in e linked ac o s.
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Common complica ions include loss o e en ion, ac u e o enee ing ce amic, ma ginal
discolo a ion, and mild unc ional discom o . Long- e m s udies emphasize ha mos
complica ions a ise om biomechanical o e load, poo ini ial p epa a ion, inadequa e hygiene,
o ma e ial deg ada ion.
Discussion: The esul s demons a e ha p olonged use o non- emo able p os he ic
s uc u es con ibu es o signi ican ana omical and unc ional changes wi hin he o al ca i y.
This occu s h ough an in e play o biomechanical o ces, mic obial dynamics, ma e ial-
issue in e ac ions, and neu omuscula adap a ion. Building on he e iewed e idence, his
discussion expands on unde lying mechanisms and clinical implica ions.
1. Biomechanical Fac o s and Ha d Tissue Adap a ion: Fixed p os heses modi y he
na u al dis ibu ion o mas ica o y o ces. The biomechanical en i onmen becomes concen a ed
a ound abu men ee h, p omp ing s uc u al adap a ion in he pe iodon al ligamen and al eola
bone. Acco ding o biomechanical adap a ion heo y, bone issue emodels in acco dance wi h
mechanical s ess pa e ns—consis en wi h Wol ’s Law. O e ime, his can lead o bone
densi ica ion in ce ain zones and eso p ion in o he s, depending on he p os hesis’s design and
occlusal accu acy.
An agonis oo h wea is ano he signi ican inding. Ce amic es o a ions, especially
hose ab ica ed om zi conia o po celain- used- o-me al designs, exhibi high ha dness and can
accele a e enamel ab asion. Li e a u e sugges s ha polished o glazed su aces educe wea , bu
long- e m de e io a ion o he glazed laye inc eases ab asi e po en ial.
2. So Tissue Responses and Gingi al Heal h: So issues espond dynamically o
p os hesis-induced s imuli. Gingi al ecession appea s consis en ly linked o long- e m
p os hesis use, pa icula ly whe e subgingi al ma gins a e p esen . When c own con ou s
enc oach on he biologic wid h, ch onic in lamma ion may occu , dis up ing he na u al
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connec i e issue a achmen . O e ime, his in lamma o y s imulus induces apical mig a ion o
he gingi a.
Hype plasia, con e sely, may a ise om pe sis en mechanical ic ion o plaque-induced
i i a ion. The li e a u e highligh s ha mucosal changes a e p e en able, p o ided p o ide s
main ain app op ia e ma gin placemen and smoo h p os he ic su aces. This emphasizes he
impo ance o p ecision du ing p os hesis ab ica ion and cemen a ion.
3. Plaque Re en ion, Mic obial Dynamics, and Pe iodon al Consequences: The
p os hesis–bio ilm ela ionship plays a cen al ole in long- e m issue heal h. Fixed p os heses
p o ide e en i e su aces ha complica e plaque elimina ion. When hygiene de e io a es,
mic obial composi ion shi s owa d pa hogenic anae obic species. O e ime, his may escala e
o gingi al in lamma ion and pe iodon al pocke ing.
Se e al s udies no e ha mic oleakage a ound p os he ic ma gins c ea es an ideal
en i onmen o mic obial p oli e a ion. The p esence o mic ogaps enables bac e ial in il a ion,
inc easing he isk o seconda y ca ies, pa icula ly in aging es o a ions. The e o e, high-
quali y ma ginal adap a ion is c ucial o minimizing long- e m complica ions.
4. Func ional and Neu omuscula Adap a ion: Mas ica ion is a complex
neu omuscula ac i i y equi ing p ecise coo dina ion. Fixed p os heses al e occlusal su aces,
which in u n in luence muscle ac i i y. Pa ien s may adap by modi ying chewing cycles,
a o ing one side, o inc easing mas ica o y o ce. O e ime, his can s ain speci ic muscles,
con ibu ing o hype ophy o a igue.
Al e ed unc ion may also a ec he empo omandibula join (TMJ). While mos pa ien s
do no de elop signi ican TMJ symp oms, li e a u e indica es ha occlusal disc epancies,
especially hose in oduced by poo ly adjus ed p os heses, inc ease he isk o join discom o o
dys unc ion. Unde s anding hese unc ional changes unde sco es he impo ance o occlusal
ha mony in p os he ic den is y.
5. P os he ic Ma e ial Conside a ions: Ma e ial p ope ies s ongly in luence long- e m
issue ou comes. Ce amic ma e ials a e gene ally biocompa ible and s able; howe e , hei
ha dness may con ibu e o an agonis wea . Me al alloys can cause localized discolo a ion o
gal anic eac ions unde ce ain en i onmen al condi ions. Composi e and esin-based ma e ials
exhibi good es he ics bu a e mo e p one o wea and discolo a ion.
The li e a u e emphasizes ha he ideal p os he ic ma e ial should no only es o e
unc ion bu also in eg a e ha moniously wi h su ounding issues o e ex ended pe iods. Thus,
ad ancemen s in bioma e ials emain c ucial o imp o ing long- e m p os he ic success.
6. Impo ance o Main enance and Pa ien Educa ion: One consis en conclusion
ac oss li e a u e is ha main enance signi ican ly in luences long- e m p os hesis longe i y.
Pa ien s wi h excellen o al hygiene and egula ollow-up expe ience ewe
complica ions, ega dless o p os hesis design. P o essional cleaning, moni o ing o ma ginal
in eg i y, ein o cemen o o al hygiene echniques, and ea ly de ec ion o unc ional changes
help p e en long- e m de e io a ion.
Conclusion: Long- e m use o non- emo able den al p os heses signi ican ly in luences
he ana omical and unc ional condi ion o he o al ca i y. The heo e ical e iew demons a es
ha hese p os heses al e mechanical load dis ibu ion, p omo e adap i e and some imes ad e se
esponses in ha d and so issues, and con ibu e o changes in occlusion, mas ica ion, and
mic obial dynamics. While ixed p os heses p o ide s able and unc ional ehabili a ion, hey
in oduce complex in e ac ions wi hin he o al en i onmen ha equi e ca e ul conside a ion.
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Key ou comes include enamel wea , gingi al ecession, plaque e en ion, neu omuscula
adap a ion, and po en ial biomechanical o e load. The li e a u e consis en ly emphasizes ha
p os hesis design quali y, ma e ial selec ion, ma ginal adap a ion, and pa ien adhe ence o
hygiene p ac ices de e mine long- e m success. Regula clinical moni o ing and ea ly
in e en ion a e essen ial o p e en complica ions and main ain o al heal h. Ul ima ely,
unde s anding hese long- e m in e ac ions con ibu es o mo e e ec i e p os hodon ic planning
and imp o ed pa ien ou comes.
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O hod Den o acial O hop.
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