Abstract: A method for simply predicting the degree of inflammation of periodontal tissue such as an inflamed area (PISA or CAPRS value), and a device (e.g., a DNA chip) used for the method are provided. The method is a method for estimating a periodontal pocket inflammation area by detecting bacterial loads of two or more types of bacteria in saliva and using the obtained detection results as indexes, wherein bacteria to be detected include: a bacterium having a positive correlation between the bacterial load of the bacterium and the periodontal pocket inflammation area and a bacterium having a negative correlation between the bacterial load of the bacterium and the periodontal pocket inflammation area.

Abstract: A packaging material for cold forming, in particular a packaging material for a battery such as a lithium ion secondary battery or the like, that includes a biaxially-stretched polybutylene terephthalate film ensuring excellent cold-formability without sacrificing acid resistance and moisture-proofing and having excellent moisture-proofing, acid resistance, and cold-formability by utilizing the biaxially-stretched polybutylene terephthalate film as a base layer and/or a barrier material reinforcing layer in a battery case packaging material for cold forming. In the battery case packaging material for cold forming, in which a barrier layer and a sealant layer, or alternatively a base layer, a barrier layer, a barrier material reinforcing layer, and a sealant layer are laminated in order, the biaxially-stretched polybutylene terephthalate film is used as the base layer and/or the barrier material reinforcing layer.