Contact eczema to substances like nickel, acrylic monomer, eugenol can be attributed to what type of hypersensitivity?
What are some important factors in whether a pulpal reaction is stimulated by a restorative procedure?
Distance from the pulp
Number of odontoblasts cut
Strength of the stimulus
Which of these are effects on the odontoblasts due to restorative procedures?
Dead tracts of fish
Tertiary dentine secretion
Wheat sheaving of odontoblasts
Overproliferation of pulp progenitor cells
Acute pulpitis can be caused by drilling
Procedures designed to remove the smear layer for bonding also increase the resistance of dentine to chemical / bacterial toxins.
Filling material can be problematic to the oral tissues because it can cause:
[blank_start]Chemical[blank_end] irritation to the pulp
[blank_start]Heat[blank_end] transfer to the pulp
[blank_start]Galvanic[blank_end] current to be set up
Filling techniques can be a problem for the oral tissues because:
[blank_start]Matrix bands[blank_end] can injure the gingiva
Poor restoration margins can lead to [blank_start]recurrent[blank_end] caries
Poor occlusal relationship can lead to apical pressure and [blank_start]apical periodontitis[blank_end]
Amalgam tattoo can be distinguished from malignant melanoma by...
Over instrumentation of root canals can lead to [blank_start]periapical[blank_end] lesions but under instrumentation can lead to [blank_start]bacteria[blank_end] being left in the canals.
In terms of impression taking, these factors could affect the oral tissues:
Too fluid material = [blank_start]respiratory[blank_end] problems
Exothermic material (such as impression [blank_start]compound[blank_end]) can cause [blank_start]burns[blank_end]
Wrong size tray = [blank_start]mucosal[blank_end] injuries
Poor fitting dentures may cause the oral tissues to develop...
When taking biopsys the following factors should be considered:
Avoid taking biopsies of [blank_start]vascular[blank_end] lesions
Make sure the sample is [blank_start]representative[blank_end]
Include normal tissue as a [blank_start]control[blank_end]
Avoid [blank_start]distortion[blank_end] of tissues
If the patient has no confidence in the practitioner
If the patient is in [blank_start]pain[blank_end]
If the lesion is large but [blank_start]benign[blank_end]
If it is not accessible at the time
If there is [blank_start]infection[blank_end] at the site
If there is uncontrolled [blank_start]systemic[blank_end] disease
In terms of different types of biopsies:
Excisional = [blank_start]removal[blank_end] of tissue
Incisional = p[blank_start]artial[blank_end] removal of tissue
Extemporary = in t[blank_start]heatre[blank_end]
Exfoliative = [blank_start]smear[blank_end] tests
Fine needle aspiration = if in[blank_start]accessible[blank_end] via scalpel such as in the [blank_start]salivary[blank_end] glands