Zodzikongoletsera za mano za Maya zopangidwa ndi yade, golidi ndi zitsulo zina zamtengo wapatali ndi miyala, mwina sizinangopereka "gloss" kwa eni ake, komanso zinkathandiza kupewa matenda a caries ndi periodontal. Katunduyu anali ndi simenti, yomwe idalumikizidwa ndi mano a kukongola konseku, asayansi ochokera ku Mexico ndi United States adati.
Ofufuza a chikhalidwe cha Mayan amadziwa kuti oimira akale a anthuwa ankakonda kupereka kumwetulira kwawo kukongola kowonjezera, ndiko kuti, akukuta mano awo kapena kubowola mabowo kuti aike "zodzaza" za jade, golide, turquoise, jet kapena hematite. Izi zinachitidwanso pazifukwa zamwambo: kudzazidwa kunali kumamatira ku incisors ndi canines muuchikulire, iwo anakhalabe ndi munthu kwa moyo wonse ndipo mwinamwake anali ndi tanthauzo lauzimu.
Ulemerero wonsewu unalumikizidwa ndi mano mothandizidwa ndi simenti yapadera. Chikhalidwe chake chinaphunziridwa ndi asayansi ochokera ku Autonomous University of Yucatan (Mexico), komanso Harvard ndi Brown Universities (USA). Iwo anapereka zomwe apeza m’magazini yotchedwa Archaeological Science: Reports. Mano a miyala yamtengo wapatali atengedwa kuchokera ku malo ofukula zakale ku Guatemala, Belize ndi Honduras.
Mu kafukufukuyu, asayansi adazindikira mamolekyu 150 omwe amapezeka muzomera zamasamba. Malingana ndi malo omwe amachokera dzino, simenti, monga momwe zinakhalira, inali ndi zinthu zosiyana pang'ono, koma zosakaniza zazikulu zinali zofanana.
Kusakaniza kwawo kunali kolimba kwambiri. Ndi zomveka, chifukwa mano okulungidwa ndi miyala yamtengo wapatali akhalapo mpaka lero. Asayansi adapezanso kuti ziphuphu zoterezi pa mano sizinapangidwe ndi anthu olemera okha, komanso oimira makalasi opambana kwambiri. Ndipo onse amuna ndi akazi.
Koma mfundo yaikulu ya olemba ntchitoyo ikukhudza achire katundu wa simenti. Zinapezeka kuti anali ndi zotsatira zochiritsa komanso zaukhondo. Kusakaniza zomatira, malinga ndi ofufuza, kunatha kuchepetsa chiopsezo cha kutupa ndi matenda m'kamwa, popeza chimodzi mwa zinthu zake zazikulu chinali pine resin, yomwe ili ndi antibacterial properties.
Awiri mwa asanu ndi atatu odzazidwa adasindikizidwa ndi chisakanizo chokhala ndi sclareolide, mankhwala achilengedwe omwe amachokera ku zomera zosiyanasiyana, kuphatikizapo sage ndi fodya. Izi zimakhala ndi antibacterial komanso antifungal zotsatira. Kuonjezera apo, amanunkhira bwino, choncho amagwiritsidwa ntchito nthawi zambiri muzonunkhira. Kuphatikiza apo, asayansi apezeka mu simenti yofunikira yamafuta a mbewu za banja la tizilombo, zomwe zimakhalanso ndi zotsatira zotsutsa.
Kubowolako kunkachitidwa mwaluso kwambiri moti sikunali kukhudza kaŵirikaŵiri minyewa ya m’mitsempha ndi mitsempha yapakati pa dzino. Mwa njira, akatswiri ofukula zinthu zakale amadziwa kuti a Mayans anali olemekezeka pa zaukhondo wa mano, choncho mfundo za asayansi zimawoneka zomveka: kusakaniza kwa simenti sikungatheke kukonza zitsulo zamtengo wapatali ndi miyala, komanso kupewa matenda a caries ndi periodontal.
