restorability/prognosis Flashcards
What is the ideal ferrule dimension for endodontically treated teeth for STRUCTURAL INTEGRITY AND PREVENT FRACTURE?
1.5–2 mm in height and 1 mm thickness of 360° ferrule around the tooth.
What is the minimum axial wall height needed for a crown?
4 mm for molars, 3 mm for other teeth.
Why is a fiber post preferred over a metal post in adolescents?
Fiber posts resemble dentin’s properties allowing it to absorb and dissipate stress, thus reducing root fracture risk and improving esthetics.
What is the ideal root length for good prognosis in central incisors?
At least 12 mm to achieve a 1:1 crown-to-root ratio.
Why is early RCT on immature roots a risk?
Thin dentinal walls and large pulp chambers increase root fracture risk.
What occlusal condition increases risk for anterior restoration failure?
Deep bite(CIIDII) with steep incisal guidance due to high shearing forces dislodging or damaging restoration.
Why should definitive restorations be delayed in adolescents?
To wait for passive eruption completion and matured gingival margins (around 20s) for better pink esthetics.
What biotype is favorable for long-term restoration stability? which is unfavorable-appear… and minimal … gingiva?
Thick gingival phenotype/biotype. Thin is unfavorable - appear more translucent with minimal Attached Gingiva
What makes esthetics critical in adolescent central incisor restoration?
High visibility, need for color match and alignment in the smile line. shape and characterization is critical too.
What causes discoloration of endodontically treated teeth?
Loss of vitality and translucency post-RCT.
What is the risk of poor gingival embrasure form in tight root proximity?
Poorly shaped gingival embrasures causes plaque accumulation and periodontal disease risk.
What indicates favorable endodontic prognosis?
Complete periapical healing and good apical seal.
What if there’s a persistent lesion post-RCT?
May need apical surgery or retreatment.
Why is fixed prosthesis avoided before full skeletal maturity?
Jaw growth and passive eruption may alter restoration fit.
What patient habits affect longevity of restorations?
Poor hygiene, bruxism, dietary habits, and compliance.
When is direct composite resin restoration indicated? Advantages 3x
When remaining tooth structure is adequate in young growing patients; conservative, modifiable/easily repaired, cost effective.
What are the pros of porcelain veneer?
Esthetic, excellent color-matching, resistance to staining, conservative.
When is a full coverage crown indicated?
Significant tooth structure loss.
Why choose emax/zirconia in young patients?
More conservative prep and high esthetics.
When is post + core + crown needed?
When insufficient coronal structure remains.
Why are fiber posts better than cast metal?
Absorb stress and reduce root fracture risk.
What is done for subgingival fracture and lack ferrule?
Orthodontic or surgical extrusion followed by custom cast post and core with full coverage crown.
When is extraction necessary? f/by?
If tooth is non-restorable. Interim: RBB/RPD
definitive tx option: implant; fixed bridge(adjacent is heavily restored)
What are definitive options post-growth?
Implant or fixed bridge depending on adjacent teeth status.
