I ejikeni Spee - Iyini?

Uyini ejikeni Spee. Ukuze siphendule lo mbuzo, kudingeka uthole ukuthi konke mayelana occlusion.

Kuyini occlusion?

Occlusion shayela noma iziphi contact we ephansi kanye engenhla emihlathini. Umqondo kakamuva kwaleligama kuhlanganisa ukuxhumana we ukuhlafuna imisipha, amazinyo, temporomandibular ukungasebenzi ngokuhlanganyela, nemisebenzi. Ebusweni occlusal amazinyo zemvelo kuthathwa njengengxenye ebusweni izinyo kusukela phezulu kuya ejulile tubercle izindawo ZaseLaki emaphakathi. It libhekene izici yokwakheka ukuthi zofuzo ingashintshwa ukuze umsebenzi ukuhlafuna ukudla.

Tincenye ebusweni occlusal

Izakhi alandelayo Laphezu occlusal: substrate hillocks izihloko zazo, futhi eminye emaphakathi ZaseLaki, nemithambeka, imigodi umngcele nokukhawula etafuleni occlusal, imisebe ezinamasondo esingunxantathu uhlevane, emikhulu. By ZaseLaki emaphakathi ebhekene ramps yangaphakathi izinyo cusps.

Umqondo iqembu othintana inikezwa imigqa amazinyo samanje ohlangothini kwakunjani ukusebenza kule cusps buccal premolar, namazinyo Canine, namazinyo izinyo lomhlathi kuhlanganise emihlathini yasenhla nemithombo yasenzansi. Ukulinganisela aqede ohlangothini occlusal oxhumana nabo, futhi ngesikhathi esifanayo maxillary palatal lamachubu nimelene esihlathini mandibular. Lapho mandible iqhubekela phambili, cusps mesial buccal ka emithambekeni ephansi verhnezubnym emithambekeni distal slide, futhi lingual stingrays cusps ohlangothini distal namazinyo engenhla slide phezu emithambekeni ohlangothini mesial amazinyo ephansi.

Lapho senza ngokweqile protrusive mandibular ukunyakaza isici akhiwa pad Ukusula verhnezubnyh lamachubu ramps distal kanye ramps nizhnezubnyh Bugorkova mesial kanzima izicubu ebusweni phezu ephansi futhi amazinyo engenhla palatal vestibular ebusweni.

Uyini ejikeni Spee futhi Wilson? On lokhu kamuva.

Indlela is ukuhlafuna ukudla?

Uma wenza ukunyakaza lateral we umhlathi ongezansi, yangaphandle ohlangothini emithambekeni cusps buccal we ephansi namazinyo slide ohlangothini ukusebenza emithambekeni engaphakathi engenhla namazinyo buccal, futhi ramps yangaphakathi nizhnezubnyh cusps lingual umbukiso ku ramps yangaphandle engenhla palatal cusps. Iza ukusungulwa igama elifanayo uxhumane cusps buccal ka premolars futhi molars.

Canines ukuhlinzeka ngokuvikela izicubu kanzima futhi periodontal namazinyo posterior ekucindezelekeni okweqile ngesikhathi ukuhlafuna, futhi ngenxa yalokho, lapho amabhuloho yokukhiqiza uyinaka kuqiniswa we sokwenziwa ukugwema ukulimala periodontal.

Lapho oxhumana canines ziyalingana e occlusions lateral umthwalo iyunifomu unikezwa phezu TMJ, amazinyo, izicubu ukuhlafuna futhi periodontium ngesikhathi ukuhlafuna. Konke lokhu kanye ihlinzeka ejikeni Spee.

Ngezinye palatal (occlusal) evele of the amazinyo engenhla futhi canines ne mesial futhi distal ohlangothini onqenqemeni 2 has a roller yokuxhuma tubercle zamazinyo eyesithathu engezansi izinyo.

Phakathi lokhu kuya maphakathi nawo-cusp ka elidlula itholakala palatal lesemkhatsini roller kokuba anemifantu nhlangothi zombili. tubercle zamazinyo ngokuthi ingxenye evelele kunazo zonke izinyo, indawo lapho oxhumana occlusal zenzeke. Lena ugobile esikhulu ijika ukunxeshezelwa Spee.

LasePalatine hillocks engenhla namazinyo posterior aphansi buccal ucingo inkomba njengoba nayo iveza ukudla ichoboza futhi ekutholeni uhlobo ukunyakaza ngaphakathi emkhakheni occluding le mandible, kuhlanganise uhlelo lokuhlelwa kabusha ukukhiqiza amabutho masticatory ukuze umthwalo eziyisisekelo ukuthatha zamazinyo ukuhlafuna axis.

Kungani occlusion Curves?

hillocks Buccal engenhla namazinyo posterior aphansi lingual ngokuthi zokuzivikela ngaphandle ukwesekwa. Ziyakwazi kancane nabo abamelene ku occlusion emaphakathi noma ngokusho kwezinye izincwadi, abalobi, ukuxhumana okunjalo akanayo. Lezi namasumpa umsebenzi wenziwa ukudla division nokudalwa ku abamelene yabo kwemithambeka ebusweni ngokuhambisa, esivikela izihlathi kanye nolimi ngesikhathi ukuhlafuna kubakhandele phakathi kwamazinyo aso. Ukuqinisekisa ijika Spee ezidingekile ukuhlafuna evamile ukudla.

Hhayi kwalapho (iphuzu) iyunifomu, othintana nabo abaningi namazinyo ezilwayo elihle kunawo ifomu occlusions ukuhlafuna umsebenzi okudaliwe ku ukumodeliswa ka occlusion ebusweni. Kulokhu, kungenzeka ukuba afeze ukucutshungulwa ukudla kwanoma iyiphi ukungaguquguquki. Bazicabela ingcindezi ukusatshalaliswa kwenzeka yonkana eksisi isixubho, nge umthwalo ubuncane phezu periodontium, futhi ngesikhathi oxhumana encane iphuzu incipha Ukusula izindiza masticatory. Imininingwane kudala emifantwini futhi hillocks ukuzinza umhlathi ongezansi ne central occlusion isimiso pestle esigqulweni, kuhlanganise akukho isithiyo ezihambayo umhlathi ongezansi yasendle occlusal. Lokhu kunikeza ejikeni Spee (esithombeni ngezansi, ungabona ukumelwa yayo kwendikimba).

Uma amazinyo angekho?

In the ukungabikho amazinyo, isb ukulahleka kwamanzi occlusal, ukutakula balo bengabadlali indiza occlusal edabula amaphuzu amathathu: vertices yesibili molars aphansi (cusps yabo distal-buccal) futhi iphuzu incisal. Lokhu indiza isetshenziswa ukusungula umfuziselo mandible i articulator, isib, nge balancer.

Occlusal ebusweni kwamazinyo indiza ovundlile akufakiwe, it yakha ijika isiqondiso sagittal: a ngilugweda kanye convex ukuba phansi ngenxa ongenhla. ijika okunjalo kwezinkolo kubizwa ngokuthi i-ejikeni Spee noma occlusal ijika sagittal. Uyingxenye umbuthano kabani isikhungo itholakala cishe maphakathi emzileni.

The enhle kakhudlwana Spee ijika?

Futhi, ngokuvumelana Spee, abacwaningi kanye Practice, occlusal ijika is ngokuphelele kuchazwa indlela articular, ngoba, kanye ejikeni isethi namazinyo ezakhiwe eyodwa engaba, futhi ngokufanelekile, amazinyo articular ikhanda slide ngesoni esisodwa selilonke phambili kanye steeper emthambekeni articular endleleni, iyunifomu ngaphezulu occlusal ijika ngilugweda. ukucabanga ngaleyo ndlela ososayensi ihlangabezane ukuphikisa eziningi. Abanye ososayensi baye bame kwelokuthi occlusal ijika akakwazi ngokuthi umgamu umbuthano. Ngo phambili ijika sagittal ka Spee ngokuvamile uya ngenhla noma ngezansi indlela ngokuhlanganyela, futhi isikhungo salo alikho isokhethi iso.

Kungani kunesidingo kule ijika sagittal ka occlusion?

Lapho mandibular ukuphokophela phambili Vered bese uya phansi ukushelela ikhanda ngokuhlanganyela kwi emthambekeni tubercle articular. Ngakho, umhlathi ongezansi lehliselwa phansi (emuva ingxenye), lwakha dehiscence esifundeni posterior phakathi imigqa amazinyo. Imininingwane uhlevane lateral namazinyo kungenzeka kuphela uma umugqa sagittal ngokufanele ukuhlafuna kobuso amazinyo. Ukulandela le mfundiso, okuthiwa i-occlusal oqondile isinxephezelo ijika.

Irediyasi kunqunywa 5,8-21,2 amasentimitha, inani eliyisilinganiso -. 6.5-8.5 cm ejulile iphuzu occlusal ijika - tubercle mesial we ephansi izinyo lomhlathi kuqala.

Lesi sihloko sachaza ngokuningiliziwe ejikeni Spee.