Lub Hawley retainer yog cov khoom siv kho hniav uas tshem tau uas siv tau dav siv tom qab- cov hniav txhawm rau tswj cov hniav sib dhos thiab tiv thaiv kev rov qab los. Nws cov qauv tsim sib npaug kev ua haujlwm thiab kev hloov pauv, ua rau nws xaiv classic hauv orthodontics.
Raws li kev tsim qauv, nws muaj peb qhov tseem ceeb: kev cai- haum acrylic resin puag uas zaum ntawm lub ru tsev ntawm lub qhov ncauj (maxillary) los yog tus nplaig sab (mandibular), nyias stainless hlau xaim hlau uas qhwv ib ncig ntawm cov hniav pem hauv ntej los tuav lawv hauv qhov chaw, thiab cov hlau me me (feem ntau ntawm cov molars) kom ruaj ntseg. Cov qauv no tso cai rau nws ua kom lub siab mos, zoo ib yam ntawm cov hniav yam tsis muaj kev puas tsuaj rau enamel.
Ua haujlwm tau zoo, nws lub luag haujlwm tseem ceeb yog txhawm rau txhim kho cov hniav hauv lawv txoj haujlwm kho kom raug -tshwj xeeb tshaj yog qhov tseem ceeb hauv thawj 6-12 lub hlis tom qab- kev kho hniav, thaum cov hniav feem ntau hloov mus. Feem ntau, cov neeg mob hnav nws puv - sijhawm (tshwj tsis yog noj / txhuam) thawj 3-6 lub hlis, tom qab ntawd hloov mus rau hmo ntuj-tsuas yog hnav rau 1-2 xyoos, lossis raws li kws kho hniav qhia.
Nws cov txiaj ntsig suav nrog kev tshem tawm kom yooj yim tu (tshwj xeeb nrog txhuam hniav mos thiab xab npum me me), kev kho kom haum (cov hlau tuaj yeem hloov kho yog tias hloov me me), thiab kav ntev (ntev 2-5 xyoos nrog kev saib xyuas kom zoo). Cov kev txwv muaj xws li kev hais lus tsis zoo thaum pib (feem ntau daws tau hauv 1-2 lub lis piam), pom cov xov hlau hauv ntej (tsawg dua zoo nkauj dua li cov tuav ruaj ruaj), thiab kev cia siab rau kev ua raws li tus neeg mob ua raws li cov neeg mob ua raws li - hnav tsis zoo tuaj yeem ua rau rov qab ua dua.
Kev kuaj xyuas tsis tu ncua-ups (txhua 6-12 lub hlis) raug pom zoo los ntsuas qhov haum thiab hloov cov khoom hnav, kom ntseeg tau ntev - siv sijhawm ntev.