Gateways Question Flashcards
2 reason why we may not be able to achieve Andrew’s 6 keys?
- Size of tooth
- Angulation / inclination of tooth
- Underlying SK discrepancy
Angulation of tooth can be corrected by?
- Repositing bracket
How to correct curve of spee?
- Rocking chair- Revserse curve of spee
- Bonding 7
- URA bite plane
- Bite turbos
Describe dento alveolar compensation and example?
- Class II- Upper Retroclined lower Proclined
Class III- Upper Proclined lower Retroclined
Once qualified list 2 things need to work?
- GDC registration
- Indemnity
Why scope of practice important
Because it describe skill and responsibilities of each role and if we do not follow we out patient in risk.
GDC registrant
- Clincal dental technician
- Dental hygienist
- Dental nurse
- Dental technician
- Dental therapist
- Orthdontic therapist
Infection virus
- HEP B
- HEP C
HIV
List next stage after inocculation injury
- Find hazard and remove it , encourage bleeding and rinse under tap water m. Do not stop bleeding under tap water for few seconds.
Inform patient .
Record in accident book
Donor/ recipient 10ml blood
Name 2 condition of tooth abnormalities
- Amelogenesis AI enamel abnormalities
- MIH
- Hypoplasia
- Dentenogesis DI dentine abnormalities
- Rubella- infection
Bracket breakages cause?
- Patient factor- Poor OH, Diet,habit, poor attendance,trauma
- Operator factor- Plaque poor removal,
Less etching, poor moisture control, figgle with bracket and composite for long time. Less cure
What does etch do?
- Expose enamel prisms, increase surface area to increase micro mechanical attachment.
Which Etch use for Porcelain crown?
- Hydrofluoric acid 9%
Class II div 2 EO features?
- Pronounce Go angle
- Class II sk
- Reduce FMPA angle
- Pronounce chin point
- Strong lower lip
- Deep labiomental fold
Class II div 2 IO features
- Retroclined upper central incisors
- mesiolabial rotated
- increased overbite
- Gummy smile
- Class II molar relationship
- Broad maxilla
- Scissor bite Tendency
3 methods of reducing an increase overbite?
Increase posterior facial growth
- Bite plane hold lower incisors and let buccal segment grown.
- Reverse curve of spee- Intrude and proline incisor and extrude molars.
- HG- Low pull - Extrude and distalise molars
High pull - Intrude and distalise molars
- Class II elastics - Extrude and Mesial upper incisor and extrude lower molar and Procline lower incisors.
Why 2 reason study model use for?
- Tx planing
- PAR
Anchorage loss how can you explain?
AP direction- Loss of Xtn space or Mesial movement of U6s.
Vertical- when High buccal canine to align (prevent with piggy back - palatal canine or ectopic canine or reduce overbite.
Transverse - ectopic canine with zing string with SS wire to protect arch form.
What is round tripping?
- When move root back and front again.
How much space create by proclining lower incisor
- 2mm than IPR
4 orthodontic method increasing posterior anchorage
- Bonding / Banding 7s
- TPA/ Nance
- HG
- Take canine first then rest of set.
- Class II elastics
What are source of anchorage?
- EO- Skeletal - back of head
- IO- Skeletal, implant and TADs, simple, compound, reciprocal and Inter and maxillary Anchorage.
TB mode of action?
- posture mandible forward stretch soft tissue and force transferred to bone and teeth which cause dental and skeletal change.
Sk effect - restrain maxilla 1mm
Enchantment of mandible growth 1-2mm.
Dentoalveolar effect - Reduce OJ , reduce overbite bilateral open bite and Class III molar relationship.
What do you check prior debond?
- Prescription / orthodontist happy with debond
- Condent from parent and patient
- Check no spaces and good interdigitagion.
Risk of debond ?
- handpiece can get hot if bur is not keep moving back and forth which can burn patient soft tissue and teeth can die.
- Enamel scaring
- Fracture of restoration
- Inhalation or injection.
How should clinical photograph stored?
- Secured and password protected and access by clinical staff.
- Backed up
Types of retention
- Removable retainers - VFR, Hawley
- Fixed -Bonded retainer
What is difference between crowding and displacement?
- Crowding- How much mm needs to fit crowded teeth 4 ways to assess, visual, digital scan, brass wire and microscope.
-Displacement - displacement of contact point of adjacent tooth
HG traction and anchorage force
Duration:
- 10 - 12 hours Anchorage
- 12-14 hours for traction
- Magnitude force:
Anchorage -250- 300g per side
Traction - 400-500g per side Sk effect
What is. OIARR?
Orthodontically induced apex root resorption
Types of root
- Blunt root, peppette chapped and short root
What can cause increase risk of root resorption
- Class II elastic with rectangular wire
- Fixed appliances
- type of tooth movement - Intrusion movement
- Previous trauma
- Longer tx.
Type of root resorption
- Internal RR- inflammatory and replacement
- external RR- inflammatory, replacement , cervical , surface
- Combined RR
How to monitor RR.
- 6 month DP
- Shorter Tx
- Limited aim.
How does loss of anchorage look ?
- Increased OJ
- OJ not reduce and Xtn space closing
- Lateral Open Bite during retraction.
- Wedge in Nance
Thumb suck - Dental feature
- Reduce overbite
- AOB
- Increased OJ
- Retroclined lower
- Proclined upper central
- Unilateral openbite with mandibular crossbite
Hypodontia UL2 tx?
- Class II - Closed space
- Class III- Open space for good interdigitation
Space closer could be slower - Open space - Beidge as deciduous then implant.
- ## 7mm space and root parallel on root to get implant.
