Qhov nkhaus ntawm Spee - dab tsi yog qhov no?

Yuav ua li cas yog qhov nkhaus ntawm Spee. Yuav kom teb tau lo lus nug no, peb yuav tsum paub tag nrho txog occlusion.

Yuav ua li cas yog occlusion?

Occlusion hu hu ntawm lub qis thiab sab sauv lub puab tsaig. Cov niaj hnub tswvyim ntawm lub sij hawm no muaj xws li tus sis ntawm cov zom nqaij, cov hniav, temporomandibular joint kawg, thiab kev khiav dej num. Lub occlusal nto ntawm lub ntuj hniav yog suav tias yog ib feem ntawm tus hniav nto los ntawm cov saum toj mus rau hauv lub deepest qhov chaw tubercle central fissure. Nws yog yus muaj los ntawm anatomical nta uas txhob nruj heev heev rau cov kev ua ntawm kev zom khoom noj khoom haus.

Hais ntawm lub occlusal nto

Cov nram qab no hais yog cov nyob rau occlusal chaw: Substrate hillocks lawv saum, thiab ntxiv central fissure, qhov chaw siab tshaj, qho to ciam restricting occlusal rooj, rays chais voos pob, ridges. Los ntawm lub hauv paus fissure txojkev nrog du hniav cusps.

Lub tswvyim ntawm pab pawg neeg ntawm cov neeg yog muab kab ntawm cov hniav tam sim no nyob rau hauv cov ua hauj lwm sab nyob rau hauv lub buccal cusps premolar, canine hniav, hniav puas hniav nrog rau sab sauv thiab sab puab tsaig. Ntsuas eliminates sab occlusal hu, thiab nyob rau tib lub maxillary palatal tubercles yog cov tawm tsam cov mandibular sab plhu. Thaum lub mandible tsiv rau pem hauv ntej, mesial buccal cusps lub sab slopes ntawm verhnezubnym distal slopes swb, thiab stingrays lingual cusps distal sab qaum hniav swb tshaj lub slopes mesial sab ntawm lub sab hniav.

Thaum ua ntev protrusive mandibular zog yam ntxwv yog tsim nyob rau ncoo erasure verhnezubnyh tubercles distal du thiab lub du nizhnezubnyh Bugorkova mesial nyuaj cov ntaub so ntswg nto rau lub sab sauv thiab sab incisors vestibular palatal nto.

Yuav ua li cas yog qhov nkhaus ntawm Spee thiab Wilson? Nyob rau qhov no tom qab.

Yuav ua li cas yog zom cov zaub mov?

Thaum ua tau zoo sab taw ntawm lub qis lub puab tsaig, tus txheej sab slopes buccal cusps lub sab hniav swb rau cov ua hauj lwm sab ntawm lub puab slopes ntawm lub sab sauv buccal hniav, thiab nrog du nizhnezubnyh lingual cusps xaub rau du txheej sab sauv palatal cusps. Los lub tsev lag luam ntawm tib lub npe hu mus rau lub buccal cusps ntawm premolars thiab hniav puas.

Canines muab kev tiv thaiv rau ib qho nyuaj cov ntaub so ntswg thiab ncig posterior hniav los ntawm ntau heev kev nyuaj siab thaum lub sij hawm zom, thiab yog li ntawd, thaum raug cov txuas hniav them rau kev mloog kom lub stabilization ntawm lub prosthesis kom tsis txhob ncig raug mob.

Thaum hu canines symmetrical nyob rau hauv sab occlusions uniform load yog muab rau cov TMJ, cov hniav, zom nqaij thiab periodontium thaum lub sij hawm zom. Tag nrho cov no thiab muab ib tug nkhaus ntawm Spee.

Thaum palatal (occlusal) chaw ntawm lub sab sauv incisors thiab canines nrog lub mesial thiab distal sab ntug 2 muaj ib tug menyuam txuas hniav tubercle nyob rau hauv lub qis feem peb ntawm cov hniav.

Ntawm no thiab hauv nruab nrab-cusp ntawm tej ntug yog nyob palatal theem nrab cov menyuam muaj grooves nyob rau ob sab. Kev Kho Hniav tubercle hu ua cov feem ntau koj yog ib feem ntawm tus hniav, ib qho chaw qhov twg occlusal hu coj qhov chaw. Qhov no yog ib tug zoo curvature ntawm lub nyiaj nkhaus ntawm Spee.

Palatine hillocks sab sauv thiab sab posterior hniav buccal hu siv raws li lawv tsim cov zaub mov crushing thiab kev txiav txim rau qhov xwm ntawm taw tsis pub dhau lub teb ntawm occluding lub mandible, xws li redistribution tsim masticatory rog yog li ntawd ib tug yooj yim load noj hniav zom axis.

Yog vim li cas occlusion curves?

Buccal hillocks sab sauv thiab sab posterior hniav lingual hu ua kev tiv thaiv tsis muaj them nyiaj yug. Lawv yog cov me ntsis nyob rau hauv kev sib cuag nrog lub antagonists nyob rau hauv lub central occlusion los yog, raws li ib txhia sau phau ntawv, xws hu tsis muaj. Cov nqhuag muaj nuj nqi yog nqa tawm cov zaub mov faib thiab creation rau lawv antagonists slopes ntawm tus nqi rau qhov chaw, uas tiv thaiv lub puab tsaig thiab tus nplaig thaum lub sij hawm zom lawv los ntawm tau txais ntawm cov hniav. Deepening Spee nkhaus tsim nyog rau ib txwm zom zaub mov.

Tsis hlws ris (point) uniform, rau ntau tus neeg tawm tsam cov hniav yog ib feem ntau dej siab daim ntawv occlusions zom nuj nqi uas yog tsim nyob rau hauv lub modeling ntawm occlusion nto. Nyob rau hauv cov ntaub ntawv no, tau mus nqa tawm ua ntawm cov zaub mov ntawm tej taub hau. Zom siab faib tshwm sim nyob rau tus pas txhuam hniav axis, nrog ib tug tsawg kawg nkaus load rau hauv lub periodontium, thiab nyob me me taw tes hu txo erasure masticatory dav hlau. Tiv tauj tsim fissures thiab hillocks stability qis puab tsaig nrog lub central occlusion ntsiab cai qws txob nyob rau hauv ib tug mortar, xws li tsis muaj chaw khuam siab rau mus rau sab puab tsaig ntawm lub occlusal teb. Qhov no muab ib nkhaus ntawm Spee (nyob rau hauv cov kev yees duab hauv qab no, koj yuav pom nws schematic sawv cev).

Yog hais tias cov hniav yog uas ploj lawm?

Nyob rau hauv lub qhaj ntawv ntawm cov hniav, i.e. poob ntawm occlusal nto, rau nws rov qab yog cov occlusal dav hlau dua los ntawm peb cov ntsiab lus: lub vertices ob sab hniav puas (lawv distal-buccal cusps) thiab incisal point. Qhov no dav hlau yog siv los tsim ib tug qauv ntawm cov mandible nyob rau hauv ib tug articulator, e.g., ntawm lub Balancer.

Occlusal nto ntawm cov hniav nyob rau hauv ib tug kab rov tav dav hlau yog tsis muaj, nws cov ntaub ntawv ib tug nkhaus sagittal kev taw qhia: ib concave thiab ib tug convex mus rau hauv qab rau sab sauv lub puab tsaig. Xws li ib tug nkhaus yog hu ua qhov nkhaus ntawm Spee los yog occlusal sagittal nkhaus. Nws yog ib feem ntawm ib lub voj voog uas nws chaw nyob kwv yees li nyob rau hauv qhov chaw ntawm lub orbit.

Qhov ntau notable Spee nkhaus?

Tsis tas li ntawd, raws li Spee, soj ntsuam thiab kev xyaum, occlusal nkhaus yog kiag li txhais articular lawv, txij li thaum nws, ua ke nrog rau qhov nkhaus ntawm lub teeb ntawm cov hniav tsim los ntawm ib tug voos kheej-kheej, thiab raws li, cov hniav thiab articular lub taub hau swb tshaj li ib ncig rau pem hauv ntej thiab cov steeper tus nqes hav ntawm txoj kev articular, ntau yam occlusal concave nkhaus. Tej kev xav tau los zaum ces yuav tsum muaj ntau yam kev tawm tsam. Lwm yam zaum cam hais tias occlusal nkhaus tsis tau hu ua ib ya ntawm ib lub voj voog. Nyob rau hauv ib tug continuation ntawm lub sagittal nkhaus ntawm Spee feem ntau mus saum toj no los yog hauv qab no tus txha txoj kev, thiab nws cov chaw yog tsis nyob rau hauv lub qhov muag socket.

Yog vim li cas muaj ib tug xav nyob rau hauv lub sagittal nkhaus ntawm occlusion?

Thaum mandibular rau pem hauv ntej zog Vered thiab mus nram lub ris hauv qab ob leeg taub hau rau ntawm tus nqes hav ntawm lub articular tubercle. Raws li, qhov qis puab tsaig uas nws txo qis down (rov qab ib feem) thiab ntaub ntawv dehiscence nyob rau hauv lub posterior cheeb tsam ntawm lub kab ntawm cov hniav. Tiv tauj pob sab hniav tsuas tau nyob rau hauv cov ntaub ntawv ntawm sagittal kab pov tseg zom nto ntawm cov hniav. Tom qab cov lus qhia no, uas hu ua tus occlusal direct nyiaj nkhaus.

Lub voos kheej-kheej txiav txim 5,8-21,2 centimeters, qhov nruab nrab nqi -. 6.5-8.5 cm deepest point occlusal nkhaus - mesial tubercle ntawm lub sab ua ntej hniav puas.

Cov tsab xov xwm piav nyob rau hauv kom meej nkhaus ntawm Spee.