Propozycja nowego wskaźnika oceny radiologicznej budowy czaszki u psa
Proposal for a new radiological index to determine skull conformation in the dog
Measurements of the canine skull are of main interest in brachycephalic dogs. They are suspected to have diseases associated with the shortened nose, which are summarized under the term brachycephalic syndrome. The relative length of the nose has become an important feature in breeding and research, although a definitive correlation to the brachycephalic syndrome still has not been proven (Knecht, 1979; Harvey, 1982; Aron and Crowe, 1985; Koch et al., 2003). Classifications of skull types can be made by two methods. The traditional phenotypic assignment into brachycephalic, mesaticephalic and dolichocephalic is based on the assumption, that dogs of a specific breed have more or less uniform skull shapes. However, alterations due to breeding and differences between individual dogs of the same breed must lead to modifications. Therefore and for a more subtle classification, skull measurements were introduced (Brehm et al., 1985; Evans, 1993; Regodon et al., 1993).
The existing indexation methods from Evans (1993) and Brehm et al. (1985) are based on cadaver studies. They classify brachycephalic dogs as having a cranial length to facial length ratio (LL-index) of > 1.60 or a skull length to skull width ratio (LW-index) of <1.44. However, the authors also mentioned the considerable range of those indices within a breed. Regodon et al. (1993) were the first to propose a classification based on radiographs of [...]
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