Objective:

To determine the morphological distribution of Class II malocclusions according to their skeletal pattern in an adult sample of the Faculty of Dentistry of the Universidad de Chile.

Materials and methods:

The sample consisted of 220 teleradiographies of individuals over 18 years old with an ANB angle greater than 4°. SNA and SNB angles were measured to assign the Class II skeletal pattern.

Results:

The mandibular was the most frequent skeletal pattern followed by the maxillary. In addition, three new skeletal patterns that had not been explicitly described in the relevant literature were found (Bi-Protruded, Bi-Retruded and Within Normal Range).

Conclusions:

The most frequent Class II malocclusion skeletal pattern in our study was the mandibular. The Bi-Retruded and Bi-Protruded variants should be incorporated into the skeletal diagnosis, particularly the Bi-Retrudeddue to its significant high frequency and clinical relevance.

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