Operative PAR 5

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Across
  1. 2. The wall or margin located toward the gingiva; in proximal preparations it forms the gingival boundary of the proximal box.
  2. 4. Loss of tooth structure caused by tooth-to-tooth contact, such as during mastication or parafunction.
  3. 6. Preparation features that help prevent the restorative material from being displaced from the prepared tooth.
  4. 8. The internal wall of a cavity preparation that runs generally parallel to the long axis of the tooth; in a Class V preparation it follows the external tooth contour.
  5. 12. Preparation features designed to help the tooth and restoration withstand masticatory forces without fracture.
  6. 15. A lesion involving the mesial or distal proximal surface of a posterior tooth, with access commonly established through the occlusal surface; decay often begins slightly gingival to the contact point.
  7. 19. The stage that includes removal of remaining defective restorative material or soft dentin, pulp protection, secondary resistance and retention forms, external-wall finishing, and final cleaning and inspection.
  8. 20. The external shape and extent of the prepared cavity, determined by lesion extent, access, and restorative requirements while conserving sound tooth structure.
Down
  1. 1. The portion of a Class II preparation extending into the proximal surface of a posterior tooth to provide access to and treatment of the proximal lesion.
  2. 3. A non-carious cervical defect described in the lecture as associated with excessive flexure of the tooth under loading.
  3. 5. The stage that establishes the initial depth and outline form and develops primary resistance, retention, and convenience forms.
  4. 7. Mechanical alteration of a defective, injured, or diseased tooth so restorative material can reestablish normal form and function, including esthetic correction when indicated.
  5. 9. Loss of tooth-surface structure caused by chemical action of acids in the continued presence of demineralizing agents; defects are often smooth, rounded, or cupped out.
  6. 10. Loss of tooth structure caused by mechanical wear from an external object or habit rather than tooth-to-tooth contact.
  7. 11. A smooth-surface lesion located in the gingival third of the facial or lingual surface; it does not include pit-and-fissure lesions.
  8. 13. The junction between the prepared cavity wall and the external tooth surface.
  9. 14. A structural defect involving a crack or fracture in tooth tissue; the lecture notes that a split tooth can be the end result of a cracked tooth.
  10. 16. A direct restorative material made by combining a metallic alloy with mercury; the lectures address its use in Class II and Class V preparations.
  11. 17. The depth established during the initial stage of tooth preparation, guided by the lesion and preparation requirements.
  12. 18. Preparation features that provide adequate access, visibility, and room for instruments and restorative procedures.