Radiographic presentation
Radiographic features include:

Bulbous shape of tooth crown with pronounced cervical constriction
Small pulp, or total pulp obliteration
Small or obliterated root canal
Presence of pulp stones
Narrow and small roots
Periapical radiolucency without any evidence of clinical pathology such as tooth decay (dental caries)

Presentation by sub-type of Dentinogenesis Imperfecta
Clinical and radiographic features can be categorised by the sub-type of dentinogenesis imperfecta (see Shields Classification in the Classification section):

Type I
Clinically, both the baby (primary) and adult (permanent) teeth often appear amber coloured and translucent, and show signs of severe attrition. Primary teeth have a more obvious appearance as they have a thinner layer of enamel overlying dentine, hence the abnormal color of dentine is more noticeable.Radiographically, affected teeth have short and narrow roots, and obliterated pulps due to dentine hypertrophy before or shortly after tooth eruption.The severity of these features is variable, with some teeth presenting with total obliteration of the pulp, while other teeth appear to have normal, healthy dentine.Some type I cases present with no clinical findings, with only radiographic abnormalities. Type II
Type II has a similar clinical and radiographic appearance to type I with some distinguishing features:

Bulbous crowns are common with pronounced cervical constriction
All teeth in the mouth are affected, with severe abnormalities present in both the baby (primary) and adult (permanent) teeth. This is in contrast to type I where the presentation is more variable
Rarely, individuals exhibit sensorineural hearing loss.
Often it starts later in life, and women are more commonly affected than men. Usual treatments may not work as well. The concept that "non-atopic" is synonymous with "non-allergic" is called into question by epidemiological data that the prevalence of asthma is closely related to the serum IgE level standardized for age and sex (P<0.0001), indicating that asthma is almost always associated with some sort of IgE-related reaction and therefore has an allergic basis, although not all the allergic stimuli that cause asthma appear to have been included in the battery of aeroallergens studied (the "missing antigen(s)" hypothesis). For example, an updated systematic review and meta-analysis of population-attributable risk (PAR) of Chlamydia pneumoniae biomarkers in chronic asthma found that the PAR for C. pneumoniae-specific IgE was 47%. Infectious asthma
When queried, asthma patients may report that their first asthma symptoms began after an acute lower respiratory tract illness. This type of history has been labelled the "infectious asthma" (IA) syndrome, or as "asthma associated with infection" (AAWI) to distinguish infection-associated asthma initiation from the well known association of respiratory infections with asthma exacerbations. Reported prevalences of IA for adults range from around 40% in a primary care practice to 70% in a specialty practice treating mainly severe asthma patients. The true population prevalence  of IA in adult-onset asthma is unknown because clinicians are not trained to elicit this type of history routinely, and recollection in child-onset asthma is challenging. Differential diagnosis
Many other conditions can cause symptoms similar to those of asthma.