As for topic of this invention, there are times when emergence of the fault from the milk tooth in the exchange period to permanent gearwheel is suppressed. As for this invention, as for the living body absorptive moldings, it includes with the contrast medium 23 which is taken the poly glycol Acid polymer, the poly L lactic acid polymer, or inside glycol Acid lactic acid copolymer are absorbed with in-house of the living body at least by a kind of living body absorptive material 21 and Roentgen image.本発明の課題は、乳歯から永久歯への交換期における障害の発症を抑制することにある。本発明は、生体吸収性成形物は、生体の組織内で吸収されるポリグリコール酸ポリマー、ポリ-L-乳酸ポリマー、又はグリコール酸・乳酸共重合体のうち少なくとも一種の生体吸収性材料21と、レントゲン映像によって写る造影剤23とを含む。
