Basics of Complete Denture Occlusion

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Occlusion

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r ntricocclusion '

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It is th iu int rcusption b tw n upp r nd low r t th (cusp to foss r ltion) It is tooth-to-tooth r ltion. In copl t d ntur s, id lly, rrO.

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rticultion ³Th contcting of t th s th ndibl ov d to nd fro c ntric nd cc ntric r ltion (dynic)´. ³Dynic tooth contct´

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r ntricr ltion '

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ost post rior r trud d unstrin d position of ndibl in r ltion to ill t stblish d v rticl di nsion fro which ny cc ntric ov nt cn b don t giv n d gr of jw s prtion. rll d horizontl jw r ltion. It is bon to bon r ltion.

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ïcc ntricocclusion '

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³It is th occlusion of opposing t th wh n th ndibl is in ny oth r r ltion thn c ntric r ltion´. Th contcting of t th on cc ntric occlusion cn occur with th jws in sttic r ltion .

+lidingocclusion ' '

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³ It is th contcting of t th in otion´. It occurs wh n th occlusl surfc s of th t th contct wh n th ndibl is oving to nd fro cc ntric nd c ntric jw r ltions.

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Hing is ov nt "Trnsltion" Th op ning in hing ov nt25 ( sur d fro incisl dg s). Th v rg op ning of hing nd trnsltion tog th r is in th r of 50. Th thr in ct gori s of ndibulr positions:

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rondylr guidnc r f rs to ngultions nd curvtur of th bony structur s of T (fi d ).

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2 . 3 . " 40 ' Th furth r th low r incisors will hv to trv l b for contcting th lingul surfc s of th upp r incisors ' lt r nd l ss r disocclusion of th post rior t th.

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The teeth are retained by periodontal tissues.

All the teeth are on bases seated on slippery tissues

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May be uneventful.

Evokes an immediate response and involves all of the teeth and the base.

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Affect only the teeth involved and are usually well tolerated,

The effect involves all of the teeth on the base. It is usually traumatic to the supporting structures.

Does not affect the posterior teeth.

Affects all of the teeth on the base.

The second molar region.

Heavy pressures of mastication in the second molar region with artificial dentition will tilt the base and ship it, if it is on an inclined foundation.

Rarely found; if present considered balancing interference.

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Considered necessary for base stability.

Gives the neuromuscular system control during function.

Not present and the mandible in function will end its chewing stroke in the most favorable physiologic position, which is very close to centric relation.

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uir ntforIncising nits: |. Th s units should b shrp in ord r to cut ffici ntly. 2. Th y should not contct during stiction. 3. Th y should hv s flt incisl guidnc s possibl consid ring sth tics nd phon tics. 4. Th y should hv horizontl ov rlp to llow for bs s ttling without int rf r nc . 5. Th y should contct only during protrusiv incising function. c

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|. Th onwill th ory of occlusion. 2. Th conicl th ory of occlusion. 3. Th sph ricl th ory of occlusion (by onson in | |).

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Th onwillth oryofocclusion: (Th th oryofth uilt rltringl )

' Propos d tht th t th ov in r ltion to ch oth r s guid d by th condylr controls nd th incisl point. Th r is 4-inch (|0c) distnc b tw n th condyl s nd b tw n ch condyl nd th incisor point. c

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Th coniclth oryofocclusion: ' Propos d tht th low r t th ov ov r th surfc s of th upp r t th s ov r th surfc of ron , g n rting n ngl of 45 d gr s with th c ntrl is of th con tipp d 45 d gr s to th occlusl pln . ' It should b not d tht t th hving 45-d gr rusps r n c ssry wh n d ntur s r d on this instru nt. c

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Th sph riclth oryof occlusion(byonsonin| |): ' show d th low r t th oving ov r th surfc of th upp r t th s ov r th surfc of sph r with di t r of inch s (20 c). Th c nt r of th sph r ws loct d in th r gion of th glb ll, nd th surfc of th sph r pss d through th gl noid foss long or conc ntric with th rticulting in nc s. c

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rOPTI+r ï

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D finition: ' rop nsting curv s r th rtificil curv s introduc d into d ntur s in ord r to fcilitt th production of blnc d occlusion; th y r rtificil count rprts of th curv s of p (nt ropost rior) nd onson (lt rl) which r found in th nturl d ntition. ' Th cop nsting curv s y b incr s d or d cr s d in rtificil d ntition to h lp chi v blnc d occlusion. c

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' conc pt is g n rl b li f r pr s nting clss of id s or obj cts. ' Occlusl sch for copl t d ntur s fll into two g n rl conc pts: |. lnc d occlusion, nd 2. onblnc d occlusion. c

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D finitionofblnc docclusion '

³ It is th bilt rl, siultn ous, nt rior, nd post rior occlusl contct of t th in c ntric nd cc ntric positions (sttic positions)´.

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T th cn b rrng d in th s sttic positions nd obs rv d on positionl, s i djustbl nd djustbl rticultors; nd ssuing tht th illo-ndibulr r ltion r cords r ccurt , th contcts will b r p t d in th outh.

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D finitionofblnc dgliding occlusion '

³ It is th v n contcting of t th s th ndibl ov s to nd fro cc ntric nd c ntric -illondibulr r ltions (dynic positions)´.

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Th t th cn h rrng d in th s dynic positions nd obs rv d on positionl nd djustbl rticultors, but th contcting in th outh will not b th s .

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' Th conc pt of blnc d occlusion do s not occur in th nturl d ntition. ' stbl bs is th ultit gol. ' Totl stbility is not possibl b cus of th yi lding ntur of th supporting structur s c

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PIrIPLïOFLrï ïLTïDTOrOPLïTï DïT ïOrrL IO

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Principl s of blnc s r lt d to copl t d ntur occlusion : '

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thods of producing occlusl blnc 7 ' ' ' '

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djustbl rticultor t chniu s v rg rticultor t chniu s Hing rticultor with g n rt d occlusl curvtur t chniu s Hing rticultor nd v rg curv t chniu s

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Hing

rticultor with g n rt d occlusl curvtur t chniu s

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Hing rticultor nd 'v rg rurv 'T chniu s '

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Fctorsthtff ctoccluslblnc |. 2. 3. 4. 5. '

rondylr guidnc . Incisl guidnc ngl . ngultion of th occlusl pln . rop nsting curv s. rusps on t th or th inclintion of cuspl ss t th

nd r th d ntist s control s it is possibl to chi v siultn ous gliding occlusl contcts fro c ntric occlusion to cc ntric occlusl positions both on th rticultor nd in th pti nt's outh.

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r ntric occlusion is "th sttic r ltionship b tw n th incising or sticting surfc s of th illry nd ndibulr t th wh n th y r in contct in ith r c n-tric or cc ntric jw r ltion.´ r ntric r ltion is th ost post rior r trud d unstrin d position of ndibl in r ltion to ill t stblish d v rticl di nsion fro which ny cc ntric ov nt cn b don t giv n d gr of jw s prtion. +liding occlusion is sttic contct of t th. Th gr t r/l ss r d gr of condylr guidnc , th gr t r/l ss r d gr of post rior tooth disocclusion Th diff r nc in distnc b tw n DO nd D is cll d th "int rrch spc ´ Incising with th rtificil t th do s not ff ct th post rior t th.

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Basics of Complete Denture Occlusion

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