Maya hniav hniav nyiaj hniav kub ua los ntawm jade, kub thiab lwm yam muaj nuj nqis hlau thiab pob zeb, tej zaum tsis tsuas yog muab "gloss" rau lawv cov tswv, tab sis kuj pab raws li ib tug tiv thaiv kab mob caries thiab periodontal kab mob. Cov cuab yeej no tau muaj los ntawm cov cement, uas tau txuas nrog cov hniav ntawm txhua qhov kev zoo nkauj no, cov kws tshawb fawb los ntawm Mexico thiab Tebchaws Meskas tau hais.
Cov kws tshawb fawb ntawm Mayan kab lis kev cai paub tias cov neeg sawv cev thaum ub ntawm cov neeg no nyiam ua rau lawv luag nyav ntxiv kev zoo nkauj, uas yog, lawv zom lawv cov hniav lossis cov kab noj hniav hauv lawv kom ntxig "fillings" ntawm jade, kub, turquoise, dav hlau lossis hematite. Qhov no kuj tau ua tiav rau lub hom phiaj kev cai dab qhuas: cov khoom ntim tau muab khi rau hauv incisors thiab canines thaum ntxov laus, lawv tseem nyob nrog ib tus neeg rau lub neej thiab tej zaum muaj qhov tseem ceeb ntawm sab ntsuj plig.
Tag nrho cov kev zoo nkauj no tau txuas nrog cov hniav nrog kev pab los ntawm cov cement tshwj xeeb. Nws qhov xwm txheej tau kawm los ntawm cov kws tshawb fawb los ntawm Autonomous University of Yucatan (Mexico), nrog rau Harvard thiab Brown Universities (USA). Lawv nthuav tawm lawv qhov kev tshawb pom hauv phau ntawv Journal Archaeological Science: Reports. Cov hniav nyiaj hniav kub tau raug coj los ntawm cov chaw archaeological hauv Guatemala, Belize thiab Honduras.
Hauv txoj kev tshawb no, cov kws tshawb fawb tau txheeb xyuas 150 cov organic molecules uas feem ntau pom nyob rau hauv cov nroj tsuag resins. Nyob ntawm qhov chaw ntawm lub hauv paus chiv keeb ntawm cov hniav, cov cement, raws li nws muab tawm, muaj ib tug me ntsis txawv txheej ntawm cov tshuaj, tab sis cov khoom xyaw tseem ceeb yog tib yam.
Lawv qhov sib xyaw ua ke muaj zog heev. Nws yog to taub, vim hais tias cov hniav encrusted nrog jewels tau muaj sia nyob rau niaj hnub no. Cov kws tshawb fawb kuj tau pom tias cov kab mob ntawm cov hniav no tau tsim tsis yog los ntawm cov neeg nplua nuj xwb, tab sis kuj yog cov neeg sawv cev ntawm cov chav kawm tsis tau zoo heev. Thiab ob leeg txiv neej thiab poj niam.
Tab sis lub ntsiab lus xaus ntawm cov neeg sau ntawv ntawm kev ua haujlwm txhawj xeeb txog kev kho mob ntawm cov cement. Nws muab tawm tias nws muaj kev kho mob thiab tu cev. Cov nplaum sib tov, raws li cov kws tshawb fawb, tau tuaj yeem txo qhov kev pheej hmoo ntawm o thiab kab mob hauv lub qhov ncauj, vim tias ib qho ntawm nws cov khoom xyaw tseem ceeb yog ntoo thuv resin, uas muaj cov kab mob tua kab mob.
Ob ntawm yim qhov ntim tau ntim nrog cov khoom sib xyaw uas muaj sclareolide, ib yam khoom ntuj tsim los ntawm ntau hom nroj tsuag, suav nrog sage thiab luam yeeb. Cov tshuaj no muaj ob qho tib si antibacterial thiab antifungal teebmeem. Tsis tas li ntawd, nws muaj ntxhiab tsw zoo, yog li nws feem ntau siv hauv perfumery. Tsis tas li ntawd, cov kws tshawb fawb tau pom nyob rau hauv cov cement tseem ceeb roj ntawm cov nroj tsuag ntawm mint tsev neeg, uas kuj muaj cov nyhuv anti-inflammatory.
Qhov drilling tau ua tiav zoo heev uas nws tsis tshua muaj kev cuam tshuam rau cov paj hlwb thiab cov hlab ntsha hauv nruab nrab ntawm cov hniav. Los ntawm txoj kev, archaeologists paub tias cov Mayans muaj kev hwm txog kev tu hniav, yog li cov lus xaus ntawm cov kws tshawb fawb zoo li plausible: cov cement sib tov tuaj yeem pab tsis tau tsuas yog kho cov hlau thiab pob zeb, tab sis kuj tiv thaiv kab mob caries thiab periodontal.
