fundamentals of cavity prep Flashcards
by WAAD
why should we apply the principles while doing cavity prep
without applying these principles there would be high possibility for restoration to fail
define cavity prep
its the mechanical operation of the broken or carious tooth structure
what is the reason to do cavity prep
would be fracture of tooth itself or carious region of tooth
while doing cavity prep u should establish these 3 main objectives
1- esthetics
2- function
3-occlusion
which one affects directly if it has a problem ?
A- function
B- occlusion
A- function ( occlusion wont directly see the effect its long term as the dr said)
what is the primary goal of cavity prep regarding caries
to remove all carious tissue and protect dental pulp
how should the margins of cavity prep be handled
the margins should be located as conservatively as possible to preserve healthy tooth structure
why is it important for the cavity prep to resist occlusal and lateral forces
to prevent fracture of tooth and ensure the restoration is not displaced or fractured
what should be restored through cavity prep besides the tooth structure
esthetics and function
what is one of key aspects of diagnosis in cavity prep
comprehensive clinical examination and diagnostic aids ( xrays , transillumination)
How does pulpal and periodontal status affect cavity preparation
-It informs decisions regarding the extent of decay removal and the approach to protect the pulp and surrounding tissues.
Why is occlusal relationship important in cavity preparation
It affects the design and choice of material for the restoration, ensuring proper function and durability
How does the relationship to other treatment plans influence cavity preparation
It must consider future treatments needed for missing teeth, which can affect the cavity design and restoration approach
What esthetic considerations should be accounted for in cavity preparation
The appearance of the restoration and how it blends with the natural tooth structure
Why is the size and position of the dental pulp a factor in cavity preparation
It determines how deep the cavity can be prepared and how to protect the pulp.
What role do supporting tissues (gingival and periodontal) play in cavity preparation
Their health and position influence the design and access of the cavity preparation
mention the operative factors that affect the cavity prep
1- knowledge
2- whether adequate isolation of operating site is maintained or not
3-skills and experience
What patient factors should be considered in cavity preparation
1- esthetic concerns
2- patient age
3- level of caries risk
what are the biological principles concerned with
health and integrity of the remaining sound tooth structure , protection of pulp and prevention of caries recurrence
why protection of pulp
dental pulp is highly specialized n sensitive, so must be protected against irritation
irritation could be
1- traumatic
2-thermal
3-chemical
how should carious dentin close to pulp be managed during cavity prep
it should be removed with extreme care to avoid over prep and unnecessary deepening of cavity
what can result from increasing the depth of cavity too much
it can lead to traumatic irritation of pulp
what is recommended to avoid traumatic irritation when removing soft dentin at the bottom of deep cavity
use sharp excavators with gentle pressure and avoid excessive cutting of enamel
how can adequate hand support help during cavity prep
prevents slipping of instrument
factors contributing to thermal injury
use of old burs , dull burs , high pressure , insufficient air water coolant , continuous contact and incorrect speed range.
How can heat generation be minimized during cavity preparation
Use sharp, small, new burs, correct speed ranges, minimal pressure, and copious amounts of coolant.
What should be avoided to prevent chemical irritation during cavity preparation
Using chemical irritants near the pulp and disinfecting cavities with chlorohexidine, which can inhibit dentin degradation in adhesive restorations.
Where might caries recur after restoration
At the margins of any restoration, and may spread unnoticed until the damage becomes too severe
How should the Cavo surface angle be managed to prevent caries recurrence
the angle should be compatible with the physical characteristics of the restorative material used
What is essential for preventing caries recurrence
Removal of all carious enamel and dentin, and all undermined enamel without dentin support. Undermined enamel may be preserved for esthetic reasons if reinforced by an adhesive restoration
What is crucial for preventing bacterial irritation to the pulp during restorative procedures
Cleanliness and asepsis.
How can aseptic procedures be achieved
Use clean and sterile instruments, isolate the operative field with a rubber dam, and ensure clean and dry hands.
What corrective procedures might be necessary to protect surrounding soft tissues during restoration
Gingivectomy and crown lengthening to ensure proper placement of the restoration.
What are the key aspects of protecting surrounding soft tissue during restoration
Proper contact, contour, occlusal anatomy, and marginal adaptation to prevent mechanical injury, food impaction, and plaque accumulation.
What do mechanical principles in cavity preparation focus on
Preservation of the structural integrity of both the tooth and the restoration.
How is structural integrity achieved in cavity preparation
Through correct cavity design that reduces destructive stress and maintains it within the tolerance of tooth structure and restoration
mechanical principles
1- correct resistance against fracture of tooth or restoration
2-adequate retention against the dislodgment of restoration from its corresponding prep
3-conservation of tooth by avoiding unnecessary cutting and eliminating weak, undermined enamel to prevent fracture under functional forces.
