Restorations and periodontal health Flashcards
What is biological width?
Combined width of connective tissue and junctional epithelial attachment formed adjacent to a tooth and superior to crestal bone
What is the approximal width?
2.15-2.3mm
What is the importance of biological width?
Establishes healthy state of the periodontium - any violations may result in gingivitis/periodontitis. It is important to preserve it during treatment.
Why do we get problems with restorations?
Poor or no contact point
Incorrect 3D contour of supragingival bulge
Overbuilt/underbuilt embrasures - all food impaction
Overhangs/ledges
Deficiences or voids at margin of restoration
Roughness of restoration - all PRF’s
what is the anatomy of a healthy periodontium?
Pink, no inflammation
Tooth supragingival bulge and food deflection so it doesn’t affect the gums, clear and no food stagnation
Flat surface - no deflection
Incisal canine contact points - food splits in embrasures and is removed
What do we examine occlusion for if food packing interproximally is a problem?
Plunger cusps - abnormal cusp contact between marginal ridges
Open or poor contact points
poor embrasure design
Underbuilt restorations
How do we maintain a healthy periodontium?
Maintain biological width, contour, smoothness of restoration, good contact point, embrasures.
What can incorrect placement of matrix band and no wedges lead to?
Gross overhangs or ledges
Plaque retention, caries, gingival/periodontal disease
What can correct placement of matrix band and wedges lead to?
Tight contact points minimising food trapping and 3D contour of restoration
Minimises voids and deficiencies
No overhangs and ledges
Why should periodontal tissues be healthy before restoring?
Spontaneous haemorrhage can occur when a matrix band is placed affecting moisture control.
How do we deal with faulty restorations?
Refurbish/repair Modify Replace Extraction Refer Leave it - if patient doesn't want it
