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Group 2

Group 2. Introduction . Residual ridge: shape of the clinical alveolar ridge after healing of bone and soft tissues following tooth extraction

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Group 2

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  1. Group 2

  2. Introduction • Residual ridge: • shape of the clinical alveolar ridge after healing of bone and soft tissues following tooth extraction • The size of the residual ridge is reduced most rapidly in the first six months, but the bone resorptionactivity of the residual ridge continues throughout life at a slower rate, resulting in removal of a large amount of jaw structure. • Residual ridge remodeling affects the function of removable prostheses, which rely greatly on the quantity and the architecture of jaw bones.

  3. Classification of Residual Ridge Morphology

  4. Type A (most favourable) • Anterior labial and posterior buccalvestibular depth that resists vertical and horizontal movement of the denture base. • Palatal morpholog resists vertical and horizontal movement of the denture base. • Sufficient tuberosity definition to resist vertical and horizontal movement of the denture base. • Hamular notch is well defined to establish the posterior extension of the denture base. • Absence of tori or exostoses

  5. Type A maxillary residual ridge

  6. Type B • Loss of posterior buccal vestibule. • Palatal vault morphology resists vertical and horizontal movement ofthe denture base. • Tuberosity and hamular notch are poorly defined, compromising delineation of the posterior extension of th • Maxillary palatal tori and/or lateral exostosesare rounded and do not affect the posterior extension of the denture base.

  7. Type B maxillary residual ridge

  8. Type c • Loss of anterior labial vestibule. • Palatal vault morphologyoffers minimal resistance to vertical and horizontal movement of the denture base. • Maxillary palatal tori and/or lateral exostoseswith bony undercuts that do not affect the posterior extension of the denture base. • Hyperplastic, mobile anterior ridge offers minimum support and stability of the denture base. • Reduction of the post malar space by the coronoid process during mandibular opening and/or excursive movements.

  9. Type C maxillary residual ridge

  10. Type D • Loss of anterior labial and posterior buccal vestibules. • Palatal vault morpholoa does not resist vertical or horizontal movement of the denture base. • Maxillary palatal tori and/or lateral exostoses“ (rounded or undercut) that intcrferc with the posterior border of the denture. • Hyperplastic, redundant anterior ridge. • Prominent anterior nasal spine

  11. Type D maxillary residual ridge

  12. List of morphological changes of completely edentulous state regarding aesthetic

  13. Deepening of nasolabial groove • Loss of labiodental angle • Decrease in horizontal labial angle • Narrowing of lips • Increase in columella-philtral angle • Prognathic appearance

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