Formation of pigmented tooth discolorations on tooth surface can be a consequence of different local factors.
22) report on a higher concentration of salivary lactoferrin (iron-binding glycoprotein) in the saliva of a patient with dark pigmented discolorations.
Teeth with carious lesion, restoration, crack, hypoplasia, drug-induced discoloration, or fluorosis were excluded from the study.
The present study evaluated discoloration of etched enamel after immediate and delayed exposure to colored agents.
Double bonds of the oxygen are responsible for the discoloration of the tooth.
Evaluate the quality and color of the restorations on the discolored tooth and replace if defective, because the discoloration of the tooth is often the result of a leak.
Clinical examination revealed grayish to yellow brown discoloration involving the cervical middle and incisal regions of maxillary and mandibular teeth except lower second premolars, upper premolars and 2nd molars.
The Clinical examination and relevant investigations suggest that in the present case the discoloration of teeth may be due to tetracycline staining
Because the estimation for the interaction parameter curvature and discoloration for board grade 3 is much greater than for board grade 2, it is obvious that, compared to the reference category (no curvature and no discoloration), the probability of producing logs for board grade 3 is much higher than for board grade 2 when discoloration and curvature appear.
For the observed log breakdown, it is the presence of discoloration and curvature in particular that influences the frequencies of the lumber grades produced.
Kernel discolorations are receiving increased attention in the Arkansas rice breeding program.
The rice harvested from the Arkansas Rice Performance Trials is also inspected for kernel discolorations.
On the cause of yellow discolorations of oak heartwood (Quercus Sec.
Discoloration of hard maple lumber commonly occurs during kiln-drying.
It was found that the discoloration
was strongly pH dependent.