Units 5-8 Flashcards
What are the objectives of periodontal Sx?
Accessibility, elimination of inflammation, enable plaque control, eliminate PPD’s, correct gingiva/bone defects, correct mucogingival defects.
What is tooth “hopeless”??
Some clients don’t respont to sx = tooth extracted. Some disease is too advanced.
What is required before sx?
good OH, healthy, no caries, extract bad teeth. no smoking.
What is biologic width?
key to crestal bone remodelling, natural seal around tooth protruding from bone in oral environm’t.
Regarding to perio sx, what does more divergence mean?
greater bone betw’n teeth.
How are bony defects named?
by # of walls remaining
Define “repair”
natural response to wound, healing by formation of tissue, does not truly restore (scar)
Define “reattachment”
reunion of CT & root that has NOT been separated by disease.
Define “ new attachment”
Union of pathologically exposed root w/ CT or epithelium. Occurs where perio had destroyed attachm’t.
Define “regeneration”
Original tissue restored to previous type and function. Ultimate goal w/ perio sx.
What is gingivoplasty and gingivectomy?
Tx gingival overgrowth. (doesn’t tx bony defect),
What are causes of ginigval overgrowth?
Genetic, hormonal, med’s.
What is perio flap surgery?
Most common sx. gingiva is lifted to expose roots @ bone, retains blood supply. Can increase zone of attached ginigva
Full thickness vs patial thickness flaps?
Full - expose bone.
Partial - split thickness, indicated when flap has to be positioned apically, no bone exposure.
Whats the difference between apically positioned and modified widman post-surgery?
Apically - tissues repositioned apically and sulcular lining excised.
Modified widman - tissue replaced close to original position.
What is osteoplasty?
Recontouring of non supporting bone.
What is ostectomy?
Removal of supporting bone.
What are contraindications for osseous sx?
Advanced perio, min bony support, aesthetics, deep vertical defects, anatomic structures.
What sx technique is used for horizontal or vertical bone loss?
Horizontal = suprabony
Vertical (angular) = infrabony
Class of infraosseous defect: “scooped” 2-wall defect w/ bu & ling walls intact
Crater
Class of infraosseous defect: 1 wall defect w/ usually a bu or ling wall remaining
Hemiseptal
Class of infraosseous defect: 3 wall “wrap around” including line angle of toot + ling or bu surface
Circumferential
What are indications for crown lengthening?
needing increased length for restoration, tooth fracture near margin, subgin caries.
What is biologic width?
Critical for maintaining tooth and perio health - 1mm sulcus, 1mm gingival CT, 1mm JE
