Rekku n uɣesmar d aṭṭan ig ttaɣen iɣes umi neqqar Aɣesmar si tama n ufella d tin bwadda. Tifidiwin d rekku n yiɣes ttasend seg seqsef (lexṣas) n idammen di tama uɣesmar. Lehlak agi at narnu ɣer tagayt n rekku n yeɣsan id ittasen seg lexṣas idammen. Llant aṭas n talɣiwin n rekku n yiɣes uɣesmar ig ttugelmen di 160 isegwasen iɛeddan. Amezruy Talɣa yettwasnen si zik, d tin id ismentes ttawil n phosphore acebḥan, tettwassen ɣur Legyiz s yisem n Phossy jaw tettwabgen-ed di timidi tis XIX d tazwara n tis XX sɣur ixeddamen n zalamiṭ s ufus. Assagi s umennuɣ anmali ad naf d akken aseqdec n phosphore acebḥan yettwasenfel (yettwabeddel) s uzegwaɣ iwakken ad sseḥbibren ɣef ixeddamen marra. Ttawil n Radium daɣen yella d sebba n waṭṭan n Rekku uɣesmar yufat-id i tikelt tamezwarut Dr H.S. Martland asegwas 1924 Radium jaw (Aɣusmar n radium), imi tixeddamin n tarmisin yesseqdacen taklut n radium cetkant ɣef uqraḥ n tuɣmas d uɣesmar, ak-d lǧarḥ deg uksum n tuɣmas, kra isegwasen akkin at id eḍfer Tigẓelt ẓẓayen n yiɣes (Ostéosarcome). Isegwasen agi ineggura, aṭṭan agi yarna ɣur imdanen isseqdacen s waṭas ttawil n bisphosphonates iwakken ad dawin aṭṭan n uxenzir. Imdanen yuḍnen Rekku n uɣesmar zemren ad sɛun rekku deg adif n yeɣsan nsen ig llan ttwaxenqen imi xuṣṣen