factors of the MDS are largely unknown, with the exception of alkalyting agents, ionizing radiation and benzene (24-26).
Absence of a permanent successor tooth: This has been cited as a major aetiological
factor [Biederman, 1962; Bjerklin et al.
Examinees with opacities only in the incisors were not diagnosed with MIH, because it was impossible to exclude the possibility that the changes were due to other aetiological
factors (trauma, infection of primary teeth).
A single aetiological
agent was detected in 672 cases (77.
This trend was supported by aetiological
studies conducted during the period, where the relative prevalence of laboratory-confirmed chancroid declined and genital herpes increased significantly.
Interpretation of the prevalence data should shed more light as to the possible aetiological
Human papillomavirus infection is the primary aetiological
agent in cervical cancer.
Thus, the existing dietary supplies of thiocyanate in relation to iodine may be a possible aetiological
factor for the persistence of endemic goitre in the study region during post salt iodization period.
Incidence rates, immunoperoxidase and DNA studies may cast light on possible aetiological
factors and whether there is a true increase in the incidence of the tumour.
KS-associated herpesvirus, also known as human herpesvirus-8 (HHV8), has been found in more than 90% of KS biopsy specimens and is now known to be the main aetiological
factor in patients with or without HIV.
rate of infection among women is found to be 24 percent, with the majority of these women testing positive for endogenous infections.
It is a commonly held belief that the main aetiological
factor leading to urinary incontinence is one or more vaginal deliveries, with risk increasing with greater parity.
Review of epidemiological, aetiological
, and demographic data for addiction disorders
Primary prevention aims to reduce the risk of an individual contracting a particular disease by eliminating the aetiological
agents from the environment.
In order to discover possible aetiological
factors for MIH, the time at which the defective enamel is formed should be considered and also how to obtain indications of the severity and duration of the insult.