dr Fazekas Árpád CLEANING AND SHAPING 1 CLEANING AND SHAPING
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dr Fazekas Árpád CLEANING AND SHAPING 1
CLEANING AND SHAPING
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OBJECTIVES I
• Cleaning (Débridement)
– Technique
– Limitations
– Criteria
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OBJECTIVES II
• Shaping
– Enlargement
– Taper
– Criteria
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Master Apical File Determination
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Apical Preparation
– Variations
• Apical Stop
• Apical Seat
• Open Apex
– Criteria
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TECHNIQUES I
• Pulp Extirpation
– Bulk Removal
– Technique
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TECHNIQUES II
• Standardized Preparation
– Objective
– Method
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TECHNIQUES III
• Flaring preparations: Step-Back Preparation
– Objective
– Method
• Initial Apical Preparation
• Taper
• Recapitulation
• Irrigation
• Size of Preparation
• Final Apical Enlargement
– Crown-down
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TECHNIQUES IV
• Passive step-back
– Instruments
– Clinical techniques and rationale(six steps)
– Evaluation criteria
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TECHNIQUES V
• Apical Clearing
–Final Apical Enlargement
–Dry Reaming
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TECHNIQUES VI
• Anatomic Aberrations
– Types
– Significance
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CHEMICAL ADJUNCTS
• Irrigation – Irrigants
• Properties of Ideal Irrigant –Solutions
–Recommendation
• Technique –Needles
–Usage
–Safety
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CHEMICAL ADJUNCTS
• Dentin Softening
– Chelators
• Types
• Action
• Effectiveness
– Decalcifiers
• Acids
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CHEMICAL ADJUNCTS
• Lubricants
– Types
– Usage
• Desiccants
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AVOIDANCE OF
PREPARATION ERRORS
• Problems
– Overinstrumentation
– Ledge Formation
– Zipping of the Apical Canal
– Stripping perforation
• Prevention
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ALTERNATIVE TECHNIQUES
OF CLEANING AND SHAPING
• Balanced Forces
• Energizes vibratory systems
– Ultrasonic instruments
– Application
– Effectiveness
– Sonic instrumentation
• Engine-Driven Instruments
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INTRACANAL MEDICAMENTS • Chemical Classification
– Phenolics
– Fixatives
– Steroids
– Antibiotics
– Combinations
– Calcium Hydroxide
• Usage – Antibacterial Action
– Pain Relief
– Canal Contents Rendered Inert
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INTRACANAL MEDICAMENTS
• Limitations and Contraindications
– Intracanal Environment
– Duration
– Toxicity
– Distribution
– Taste and Smell
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