Chifukwa Chake Mukusowa Anu Anu Operekera Koma Osati Nzeru Zanu
Monga momwe dzina lawo limasonyezera, premolars ali pafupi kutsogolo kwa m'kamwa mwa munthu. Manowa amadziwika kuti bicuspids. The premolars amalingidwa mano opatsirana, pamene amagwira ntchito kutsogolera chakudya kuchokera kwa amphepete pafupi ndi kutsogolo pakamwa mpaka kumbuyo kutsogolo kwa pakamwa pofunafuna.
Zowona za Munthu Premolar
Anthu ali ndi zaka zisanu ndi zitatu zokhazokha.
Pali mitundu iwiri yoyambirira ya mankhwala m'zinthu zina zinayi zomwe zimapezeka pakamwa. Ngakhale kuti zaka zenizeni zenizeni panthaŵiyo zakhala zikusiyana, premolar yoyamba nthawi zambiri imakhala pafupifupi zaka zoposa zisanu ndi zinayi. Koyambanso kafukufuku wachiwiri amatsatira chaka chimodzi pafupi ndi zaka khumi.
Anatomy ya Premolar
Matenda a premolar ali ofanana ndi oyamba ndi oyamba, ngakhale ali ochepa poyerekeza. Premolars ili ndi mizu iwiri yokha yomwe imayikidwa mwamphamvu m'fupa kuti ikhale yolimba.
Zomwe Zimayenderana ndi Zolemba
Premolars ndi ofanana kwambiri ndi zochitika zogwiritsidwa ntchito ndi ma anatomy ndi mawonekedwe. Komabe, mosiyana ndi kukonzekeretsa, akuluakulu amakhala ndi nthawi zokwana 12 zokha, pamene ali ndi zaka 8 zokha. Mitengoyi imakhala yotalikirana kwambiri ndi mano openyera mano onse, chifukwa imayikidwa kumbuyo kwa pakamwa pamsaya. Molars ayambiranso kale kuposa premolars, monga yoyamba imatulukamo pakamwa pafupi zaka zisanu ndi chimodzi.
Pali kusiyana kwa nthawi pakati pa maonekedwe oyambirira ndi achiwiri, chifukwa nthawi yachiwiri sichimawonekera mpaka zaka 12 kapena 13.
Nzeru Zachifundo
Chotsatira chachitatu ndi chodziwikiratu kwambiri pa zochitikazo. Anthu ambiri amanena zachitatu molar ngati dzino la nzeru. Mano opatsa nzeru amatha kuphulika pakati pa zaka 17 ndi 25.
Nthawi zambiri amachotsedwa pakamwa , chifukwa nthawi zambiri sakhala ndi malo okwanira, ndipo amatha kuyambitsa matenda osiyanasiyana a mano ndi mano ena. Pamene mano amzeru amachokera nthawi zambiri amachotsa mano ena panjira, kusinthasintha mano.
Momwe Otsogolera ndi Omwe Amagwira Ntchito Pamodzi
Mitengo ndi yaikulu kwambiri mwa mano onse pakamwa. Kukula kwake n'kofunikira pamene akugwiritsidwa ntchito kupukuta chakudya mzidutswa ting'onoting'ono kuti tamezedwe mosavuta, osati osakanikirana. Zokongoletsera zapangidwa ndi cholinga chothandizira kulimbikitsa mphamvu yomwe imapangidwa kuchokera ku kutafuna, kukuma, ndi kugaya zomwe zimachitika pa malo a zolemba. The premolars ali patsogolo mwachindunji ndipo amagwiritsidwa ntchito kudutsa chakudya kuti chifufuze.