Supporting Structures in Maxillary arch/ Anatomical Landmarks/ Part 3. (Sl No 10)

#supporting structuresmaxilla #anatomicallandmarksmaxillaLink for previous classes on 1)Anatomical landmarks/Part1/classification   / 4yke2kp3g3   2)Anatomical Landmarks/ Part 2/Limiting structures in Maxillary arch    • Limiting Structures in Maxillary arch/ Ana...   #Supportingstructures #maxillary arch: are areas capable of withstanding forces of mastication acting on the denture bearing area , due to certain anatomical features like having keratinised masticatory mucosa, firm submucosa and favourable trabecular pattern of underlying bone.These areas are least prone to resorption Depending on its efficiency to provide support and withstand stress they can be divided into: 1)primary stress bearing area postero lateral aspect of hard palate 2) secondary stress bearing areas rugae area maxillary tuberosity slopes of residual ridge Residual ridge resorption (RRR) is a term that is used to describe the changes which affect the alveolar ridge following tooth extractions, which continue even after healing of the extraction socket. • There exists a wide variety of shapes and sizes of residual ridges. They are categorized into common residual ridge configuration in a system of six orders given by Atwood. Order1-Pre-extraction. Order2-Post-extraction. Order3-High, well rounded. Order4-Knife-edge. Order5-low, well-rounded Order6-depressed.