Removable orthodontic
appliances
• Active components
* Springs
i) Finger spring:-most important
removable orthodontic
appl...
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com

www.indiandentalacademy.com
ii) Z spring:It is used for labial
movement of incisors
& correction of minor
rotations.

iii) T spring:It is used for the...
iv) Mattress spring:used for the correction
of labial movement of
the teeth in crossbite
where sufficient
space available ...
vi) Coffin spring:Introduced by
WALTER COFFIN in
1881.
It is an omega
shaped spring which
helps to bring about
arch expans...
vii) Canine retractors:#Buccal self supported
canine –
→ It is made up of 0.7mm
wire. It consists of
active arm, helix of
...
#Palatal canine
retractor:→Made up of 0.6mm
stainless steel wire. It
consists of active arm,
helix coil,& a guiding
arm.
→...
#Helical canine retractor:→Also called reverse loop
canine retractor. Made up
of 0.6mm wire.
→It consist of active arm,
re...
# U loop canine retractor:→Made up of 0.6-0.7mm
round stainless steel
wire.It consists of U loop,
active arm & retentive
a...
• Bows:i)Short labial bow:→Made up of 0.7mm
round stainless steel
wire.It is constructed in
such a way that the bow
contac...
ii) Long labial bow:→It is just the modification of
short labial bow. It extends
from first premolar to first
premolar of ...
iv)Robert’s retractor:Made up of 0.5mm wire.It
extends from labial
surface of canine to
canine instead of a
regular loop i...
v) Reverse labial bow
It’s the modification of
conventional bow. In this
there is a U loop &
activation of the applianceis...
vii)High labial bow with
apron spring:It extends high in the vestibule. It
is made up of thicker gauge
wire & onto which t...
• Screw:It’s active component of the
removal appliance.It is
activated by the patient by
using a key.Mainly it can
bring a...
• Advantage of screw over the spring:1) Easier to manage.
2) Less chair side time required.
3) Fewer tendencies to get dis...
• Elastics:-seldom used .
-generally used for
anterior retraction
with labial bow.
-Advantage
:Aesthetically
acceptable.
-...
• Passive components
Clasp:
It is a retentive component of the
removable appliance which helps in
keeping the appliance in...
• Two types of undercuts are found in
natural dentition
1)Buccal & lingual undercuts“C”clasp & Jackson’s clasp.
2)Mesial &...
1) Circumferential clasp:
→also called Three quarter or C
clasp.
→Parts :-Circumferential
retentive tip, interocclusal
arm...
2)Jackson’s clasp:
→Also called U clasp or Full
clasp.
→Advantage:
-Easy to construct.
-Offer adequate retention.
→Disadva...
3) Adams clasp:-By C.P.Adams.
-Also called as Liverpool
clasp,Universal
clasp,Modified arrowhead
clasp.
-Parts…Two
arrowhe...
• Modifications of Adams clasp:-

www.indiandentalacademy.com
4)South end clasp-Used for retention purpose in
anterior region.
-The wire adapted on the cervical
margin of both central ...
6)Ball end claspThis appliance have a ball
like structure on one
end.This ball can be made
with the help of silver
solder....
7)Crozat clasp-Resembles full clasp but an
additional piece of wire
soldered which engages in
mesial & distal proximal
und...
• Disadvantage of
Schwartz clasp:1)Need special arrowhead
forming plier.
2)Occupies large amount of
space in buccal vestib...
• Base plate:-It is made up of cold cure acrylic resin.
-The primary function of base plate is to
incorporate all the comp...
www.indiandentalacademy.com
Leader in continuing dental education

www.indiandentalacademy.com
Upcoming SlideShare
Loading in …5
×

Components of removable appliances 2 /certified fixed orthodontic courses by Indian dental academy

36,172 views

Published on


The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.

Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078

3 Comments
133 Likes
Statistics
Notes
No Downloads
Views
Total views
36,172
On SlideShare
0
From Embeds
0
Number of Embeds
16
Actions
Shares
0
Downloads
2
Comments
3
Likes
133
Embeds 0
No embeds

No notes for slide

Components of removable appliances 2 /certified fixed orthodontic courses by Indian dental academy

  1. 1. Removable orthodontic appliances • Active components * Springs i) Finger spring:-most important removable orthodontic appliances. -used for mesiodistal movement of the teeth. www.indiandentalacademy.com
  2. 2. INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  3. 3. ii) Z spring:It is used for labial movement of incisors & correction of minor rotations. iii) T spring:It is used for the buccal movements of the premolars & canine. www.indiandentalacademy.com
  4. 4. iv) Mattress spring:used for the correction of labial movement of the teeth in crossbite where sufficient space available for tooth movement. v) Helical coil spring:used to regain lost extraction space. www.indiandentalacademy.com
  5. 5. vi) Coffin spring:Introduced by WALTER COFFIN in 1881. It is an omega shaped spring which helps to bring about arch expansion. www.indiandentalacademy.com
  6. 6. vii) Canine retractors:#Buccal self supported canine – → It is made up of 0.7mm wire. It consists of active arm, helix of 3mm diameter & a retentive arm. Coil is placed distal to long axis of canine. → indicated in case where canine is buccally place & placed high in vestibule. www.indiandentalacademy.com
  7. 7. #Palatal canine retractor:→Made up of 0.6mm stainless steel wire. It consists of active arm, helix coil,& a guiding arm. →It is indicated in case of palatally placed canine which required retraction. www.indiandentalacademy.com
  8. 8. #Helical canine retractor:→Also called reverse loop canine retractor. Made up of 0.6mm wire. →It consist of active arm, retentive arm & coil of 3mm of diameter. →Activation done either by opening the coil by 2mm or by cutting 2mm of free end & readapt it around the canine. www.indiandentalacademy.com
  9. 9. # U loop canine retractor:→Made up of 0.6-0.7mm round stainless steel wire.It consists of U loop, active arm & retentive arm. →U loop placed 2-3mm below the cervical margin. →It is used when minimum retraction (12mm)required. → It is easy in fabrication & less bulky. www.indiandentalacademy.com
  10. 10. • Bows:i)Short labial bow:→Made up of 0.7mm round stainless steel wire.It is constructed in such a way that the bow contacts the most prominent labial surfaces of anterior teeth. →It is used for retention purpose as well as minor overjet reduction & anterior space closure. www.indiandentalacademy.com
  11. 11. ii) Long labial bow:→It is just the modification of short labial bow. It extends from first premolar to first premolar of opposite side. iii)Split labial bow :→Modification of short labial bow. It is split in the middle.Effective in anterior retraction & closure of midline diastema. www.indiandentalacademy.com
  12. 12. iv)Robert’s retractor:Made up of 0.5mm wire.It extends from labial surface of canine to canine instead of a regular loop it incorporates a 3mm internal diameter helix at the base of the loop.The distal arm of the loops are supported in softened stainless steel tubes of 0.5mm internal diameter. www.indiandentalacademy.com
  13. 13. v) Reverse labial bow It’s the modification of conventional bow. In this there is a U loop & activation of the applianceis done by opening the loop. vi) Mills retractor:It’s also modification of conventional bow.It is used in patients with increased overjet.But due to it’s complex design & poor patient complience it is not widely used. www.indiandentalacademy.com
  14. 14. vii)High labial bow with apron spring:It extends high in the vestibule. It is made up of thicker gauge wire & onto which thinner gauge of wire of 0.4mm wire is attached for the retraction of one or more upper anterior teeth. viii) Fitted labial bow:It adapts the contours of the labial surface of the teeth & used for retention purpose. www.indiandentalacademy.com
  15. 15. • Screw:It’s active component of the removal appliance.It is activated by the patient by using a key.Mainly it can bring about three types of movements-Expansion of arch. -Movement of teeth or group of teeth in buccal or labial direction. - Movement of teeth or group of teeth in mesial or distal direction. www.indiandentalacademy.com
  16. 16. • Advantage of screw over the spring:1) Easier to manage. 2) Less chair side time required. 3) Fewer tendencies to get dislodged ideal tooth movement is achieved by turning the screw a quarter turn every 37 days. www.indiandentalacademy.com
  17. 17. • Elastics:-seldom used . -generally used for anterior retraction with labial bow. -Advantage :Aesthetically acceptable. -Disadvantage : can cause gingival trauma. :risk of arch form getting flattened. www.indiandentalacademy.com
  18. 18. • Passive components Clasp: It is a retentive component of the removable appliance which helps in keeping the appliance in place & resist the displacement of the appliance. Mode of action: Clasps acts by engaging certain constricted areas of the teeth that are called undercuts www.indiandentalacademy.com
  19. 19. • Two types of undercuts are found in natural dentition 1)Buccal & lingual undercuts“C”clasp & Jackson’s clasp. 2)Mesial & distal undercutsAdam’s clasp & Crozat clasp. • Requirement of the clasp 1)Should offer adequate retention. 2)Can use in partially & fully erupted teeth. 3)Easy to fabricate. 4)Should not apply active force. 5)Should not impinge soft tissue. 6)Should not interfere with normal occlusion. www.indiandentalacademy.com
  20. 20. 1) Circumferential clasp: →also called Three quarter or C clasp. →Parts :-Circumferential retentive tip, interocclusal arm, retentive arm. →Advantages: i)Easy to fabricate. ii)Simple in design. →Disadvantage: Can not used in partially erupted teeth. www.indiandentalacademy.com
  21. 21. 2)Jackson’s clasp: →Also called U clasp or Full clasp. →Advantage: -Easy to construct. -Offer adequate retention. →Disadvantage: -Inadequate retention in partially erupted teeth. www.indiandentalacademy.com
  22. 22. 3) Adams clasp:-By C.P.Adams. -Also called as Liverpool clasp,Universal clasp,Modified arrowhead clasp. -Parts…Two arrowheads,Bridge,Two retentive arms. Advantagesi)Rigid & offer good retention. ii)Can used in partially erupted teeth. iii)Can give in permanent & deciduous teeth. www.indiandentalacademy.com
  23. 23. • Modifications of Adams clasp:- www.indiandentalacademy.com
  24. 24. 4)South end clasp-Used for retention purpose in anterior region. -The wire adapted on the cervical margin of both central incisors. 5)Triangular clasp-Small triangular shaped clasp between two adjacent posterior teeth & engages the proximal undercut. -Use: whenever additional retention needed. www.indiandentalacademy.com
  25. 25. 6)Ball end claspThis appliance have a ball like structure on one end.This ball can be made with the help of silver solder. The ball engages the proximal undercut between two adjacent posterior teeth. Indication: Whenever additional retention is needed. www.indiandentalacademy.com
  26. 26. 7)Crozat clasp-Resembles full clasp but an additional piece of wire soldered which engages in mesial & distal proximal undercut. 8)Schwartz clasp-Also called arrowhead clasp. -Engages in interproximal area between premolar & molar. -Provide adequate retention. www.indiandentalacademy.com
  27. 27. • Disadvantage of Schwartz clasp:1)Need special arrowhead forming plier. 2)Occupies large amount of space in buccal vestibule. 3)Can injure inter dental soft tissue. 4)Difficult to fabricate & time consuming. www.indiandentalacademy.com
  28. 28. • Base plate:-It is made up of cold cure acrylic resin. -The primary function of base plate is to incorporate all the components together as a functional unit. -Helps in anchoring the appliance in place. -Provide support to wire components. -Helps in distributing forces over a larger area. -It’s thickness should be 1.5-2 mm www.indiandentalacademy.com
  29. 29. www.indiandentalacademy.com Leader in continuing dental education www.indiandentalacademy.com

×