Potential Risks of Orthodontic Treatment P2 Flashcards
ENAMEL DAMAGE
ENAMEL COLOR ALTERATIONS
The color of natural teeth is changed in various ways after fixed appliances orthodontic treatment both short-term and long-term.
ENAMEL DAMAGE-ENAMEL COLOR ALTERATIONS
Color quantification
ENAMEL DAMAGE-ENAMEL COLOR ALTERATIONS
How does the color of natural teeth change after fixed appliances ortho Tx?
- The color of natural teeth is changed in various ways after fixed appliances orthodontic treatment both short-term and long-term.
- Moderate evidence exists that shorter resin tag penetration produces less change in enamel color following clean-up and polishing.
ENAMEL DAMAGE-ENAMEL COLOR ALTERATIONS
Teeth discoloration
ENAMEL DAMAGE-ENAMEL COLOR ALTERATIONS
Enamel structure alterations vs Enamel surface modifications
Extrinsic and intrinsic discoloration of
TOOTH WEAR
What happens to Post-treatment volume of occlusal morphology?
Post-treatment volume of occlusal morphology was significantly reduced (p<0.001) with a mean value of occlusal wear of 1.03 mm3.
TOOTH WEAR
What was shown to be an important factor for the development of occlusal wear?
Treatment duration over 30 months was an important factor in the development of occlusal wear (p<0.001).
- Varying degrees of tooth wear were reported after comprehensive orthodontic treatment.
TOOTH WEAR
Ceramic brackets
- Placement of ceramic brackets is contraindicated on the mandibular anterior teeth in occlusions with deep overbite and minimal overjet.
- During maxillary incisor retraction, the overbite should be reduced first so that the maxillary incisors do not contact the mandibular ceramic brackets.
- Care should also be taken not to bond ceramic brackets on the mandibular canines when they are in Class II relationship.
Tooth wear
What contibutes to fracture/ wear/ damage of enamel?
- Band seaters, band removers, and brackets removal can cause fracture of enamel, or even whole cusps in heavily restored teeth.
- During removal of adhesives, the debonding burs can cause enamel damage, particularly if used in a high-speed handpiece.
- Certain components of orthodontic appliances can cause wear to opposing teeth if there is heavily occlusal contact during function.
Enamel changes associated with the of attachments:
Enamel cracks
Debonding
- Fractures during debonding
- Loss of uppermost layer (> 10 m) rich in F
- Increase in roughness after resin grinding
How was the incidence of bracket fracture decreased?
The use of new ceramic brackets and debonding instruments decreased the incidence of bracket fracture.
Debonding attachments
- The force applied must not exceed 13MPa to prevent enamel cracks.
- Care must be exercised when debonding attachments from compromised teeth.
- Several optional methods to remove metal brackets can be used.
- A safe, simple, and efficient method for removing ceramics brackets has yet to be designed.
Debonding: Hazards for operators
INTRA-ORAL SOFT TISSUE DAMAGE
- Ulceration can occur during treatment as a result of direct trauma from both fixed and removable orthodontic appliances.
- Lesions generally heal within a few days without lasting effect.
- Intra-oral allergic reactions to orthodontic components are rare but have been reported in relation to nickel, latex, and acrylate.
- Management depends on the location and severity of the allergic reaction and the scope for modifying treatment.