𝔖 Bobbio Scriptorium
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Placement, adaptation, and retention of periapical films in the upper jaw

✍ Scribed by Matthew Lozier

Book ID
118957103
Publisher
Elsevier Science
Year
1949
Tongue
English
Weight
467 KB
Volume
2
Category
Article
ISSN
0030-4220

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## Abstract This study reveals the existence of four distinct but genetically related types of upper jaw mechanisms: 1. The non‐protractile, with no mechanism for the protrusion of the pre‐maxillae. The maxillaries form part of the upper margin of the mouth, as in Isospondyli, Apodes and Haplomi.