[Localization of impacted maxillary canines by palpation and orthopantomography].
ABSTRACT In orthodontic practice occurred problems associated with labio-palatal localization of impacted permanent maxillary canines. Not always is possible to determinate labio-palatal location of these teeth on the basis of palpation, therefore clinical examination aided by radiographic investigation. Orthopantomogram is the most widely used radiograph in orthodontics. The purpose of present study-test diagnostic value of palpation and orthopantomography in cases of maxillary canines impaction on the basis of evaluation of migration and inclination of impacted teeth. Thirty nine patients of Clinic of Orthodontics, Kaunas University of Medicine, orthopantomograms were available for analysis. Forty two impacted canines were investigated. Only 64% of canines could be palpated. It depended on the vertical position of the tooth. Distribution of the values of canine inclination to the middle of upper jaw was too big for more precise statistical analysis. Canines, which were medial to the 3th horizontal sector (these canines overlapped longitudinal axis of the lateral incisor), were located palatally.
Chapter: Tooth Eruption and Dental Impaction[show abstract] [hide abstract]
ABSTRACT: A broad range of variation exists in the normal eruption times for primary and permanent teeth in humans. However, normality is usually associated with bilateral symmetry. Furthermore, cases where eruption time is grossly beyond the extremes of normalcy might be considered to represent a pathological state . Radiography plays an important part in determining the normality of tooth eruption with regard to position and time sequence. This is particularly important in patients whose teeth are undetectable by clinical means, such as those with delayed eruption or impaction. Impaction is the impedance of dental eruption by adjacent or overlying tooth, bone, or pathosis. Occasionally, one or two primary teeth—natal teeth— are present at birth or, in the case of neonatal teeth, erupt within the first month of life . Eighty-five percent of such prematurely erupting teeth are mandibular primary central incisors, 11% are primary maxillary incisors, and 4% are primary posterior teeth . Such teeth are generally well-formed and normal in all respects.01/1970: pages 73-82;