The present invention is prosthetic tooth replacement including a dental crown portion and a joining portion adapted to fixedly attach to a dental implant. Then installing casing in the first wellbore and in the enlarged wellbore segment. Another spacer separates the active region and an upper mirror. This anisotropic surface texture can be formed in a surface of one or more magnetic layers of the shield, or can be formed in a surface of an under-layer on which the shield is deposited. The test circuitry compresses this result of this comparison and provides it to the next device as an updated global result data.