Treatment Modalities And orthodontic Appliances Flashcards
1
Q
Which factors to consider type of appliance?
A
- Patient concern and attitude
- Patient’s parents expectation
- Oral hygiene status
- Medical history
- Treatment Aims
2
Q
Primary Dentition
A
- Removable appliances
- Expansion appliances
3
Q
Mixed Dentition
A
- Removable appliances
- Functional appliances
- Fixed appliances
4
Q
Secondary Dentition
A
- Removable appliances
- Functional Appliances
- Fixed appliances
5
Q
Adult
A
- Removable appliances
_ Fixed appliances - Surgery
6
Q
What moments pre adjusted brackets do?
A
- 3D controlled tooth movement
- Bodily movement
- Intrusion / extrusion
- Correct rotations
- Space closure
- Multiple tooth movements
7
Q
What’s benefit of pre adjusted brackets?
A
- Excellent tooth control and finishing as its 3D tooth movement can be achieved.
8
Q
How tipping movement achieve?
A
- The round wire permits the tooth to tip around a point known as the root centroid which lies about 1/3 apex of the root
9
Q
How bodily movement achieve?
A
- The rectangular wire in rectangular bracket slot produce a force that control position of crown and root. This torque allows us to move teeth bodily.
10
Q
How torque movement achieve?
A
-Torque allows us to control the position of the crown and root to permit us to control inclination of the tooth
11
Q
Sliding mechanism?
A
- A Rigid arch wire usually 0.019x0.025 ss wire allows the teeth to slide along the arch wire and space to close. This space closure referred as Sliding mechanism
12
Q
Types of fixed appliances
A
1- Standard brackets (SS / Asthetics)
2- Self ligating brackets (SS/ plastic/lingual)
3- Tip edge
13
Q
Stainless steel brackets
A
- Pre adjusted edgewise appliance. MBT
-Slot size usually 0.022x0.028 - Allow lighter forces in early stages of treatment
- can also accommodate larger dimension wire with increased stiffness- good for arch co - coordination and sliding mechanism.
14
Q
Self ligating systems
A
- Adv- Complete and secure wire engagement.
- less chair side
- Reduced friction
- Better OH
Dis Adv-
- Clips can fracture
- Partial ligation not possible
- Wire can slide
- Cost
- Takes practice
15
Q
Ceramic Brackets
A
- Non metallic which are first shaped then hardened by heat
- Orthdontic Ceramic are made of Alumina
- Ceramics are harder than SS
Types
- Monocrytalline (machined by synthetic sapphire) e.g Ice (Ormco)
- Polycrystalline (injection moulding of alumina) e.g Clarity 3M
