Periodontal Considerations
- PD >= 5mm
- Mobility Class 2-3
- Bone loss >=30%
- Furcation involvement Class II-III
- Bone defect morphology: Horizontal
- Recurrent periodontal abscess
Prosthodontic Considerations
- Amount of tooth structure remaining
- C:R ratio
- Need for additional procedures
- Esthetics
Assessing amount of remaining tooth structure?
Caries, defective restorations (fillings, post and crowns, old crowns), fracture
Dimensions of a favourable tooth preparation form?
- Total occlusal convergence: 15-20 degrees
- Occluso-cervical dimension of 3-4mm
- Ferrule effect for ETT
What is Retention Form?
Feature of tooth preparation that resists dislodgment of crown in a vertical direction
What is Resistance Form?
Features of tooth preparation that enhances stability of a restoration and resists dislodgement along an axis other than path of placement
The ferrule height must be?
1.5-2mm
The ferrule width must be?
1mm
Need for additional procedures include?
- Crown lengthening
- Orthodontic extrusion
Factors affecting crown lengthening?
- Length of root
- C:R Ratio
- Taper of roots
- Root proximity
- Location of furcation
Intra-arch Prosthodontic Considerations?
- Anterior or posterior
- Strategic value of tooth
- Abutment for FDP or RPD
Inter-arch Prosthodontic Considerations?
- Opposing arch: Denture/teeth/fixed prosthesis
- Occlusion
- Parafunction
Endodontic Considerations?
- Sensibility testing
- TTP TTPp
- Sinus tract or swelling
Endodontic Considerations on Radiographic Parameters?
- Presence of periapical lesion
- Prior RCT: Quality of root fill, presence of iatrogenic errors
- Perio-endo lesion
Patient Considerations?
- Patient’s expectations
- Cost
- Compliance
- Medical health
