This document discusses stainless steel crowns, which are semi-permanent restorations used in primary and young permanent teeth. It describes the history, types, indications, advantages, disadvantages, composition, placement procedure, modifications, and complications of stainless steel crowns. Stainless steel crowns provide full tooth coverage and are effective for restoring extensively decayed or malformed primary teeth. They are durable, economical restorations that can improve function and aesthetics for young patients.

1. PRESENTED BY,
Shiji margaret
CRRI

2. CONTENTS
•History
•Introduction
•Types of crown
•Types of stainless crown
•Classification of stainless steel
crown
•Indication
•Objective of stainless steel crown
•Advantage
•Disadvantage
•Composition

3. •Factors to be considered in pre –
operative evaluation
•Clinical procedure
•Tooth preparation
•Reduction
•Method of placing
•modification
•complication
•conclusion
•reference

4. HISTORY
Stainless steel crown was first
introduced as chrome steel crown by
william humphrey
 stainless steel crown were
introduced to pediatric dentistry by
rocky mountain company in 1947
First used in the late 1940s and
became commonly used in the 1960s

5. INTRODUCTION
STAINLESS STEEL CROWN IS A SEMI PERMANENT
RESTORATION USED IN PRIMARY AND YOUNG
PERMANENT TEETH.
STAINLESS STEEL CROWN IS USED IN DECIDUOUS
DENTITION THAN PERMANENT DENTITION BECAUSE OF
2 REASONS
THAT IS DECIDUOUS TEETH CARIES CAN DESTROY
THE TOOTH FASTER THAN PERMANENT. AND ALSO IN
DECIDIOUS TOOTH PULP IS LARGER THAN PERMANENT
AND ENAMEL AND DENTIN THICKNESS IS LESS.
STAINLESS STEEL CROWN IS AN EFFICIENT AND
RELIABLE METHOD OF RESTORATION OF DECIDUOUS
DENTITION.

6. Types of crowns
•Stainless steel
•Nickel chromium
•Veneered stainless steel crowns
•Strip crown
•Ceramic crown

7. Types of stainless crowns
Rocky mountain
Ormco company
Unitek
3M company

8. Classification of stainless steel crowns
Based on shape
Untrimmed- crowns are neither
trimmed nor contoured
Pretrimmed- crowns have stright
non-contoured sides but are festooned to
line parallel to the gingival crest.they still
require contouring and trimming
Precontoured – these are
festooned and precountoured though a
minimal amount of trimming may be
necessary

9. indication
 extensive decay in primary and young
permanent tooth

10. Teeth deformed by developemental
defects or anomalies
Teeth with hyperplastic defects

11. Following plup therapy

12. As a preventive restoration
As an abutment
Temporary restoration of
a fractured tooth
In severe cases of bruxism

13. Single tooth cross bite

14. For replacing prematurely
lost anterior teeth

15. Objectives of using
To achieve biologically
compatible , competent for
mastication and clinically
acceptable restoration.
To maintain the form and
function and where possible the
vitality of the tooth should be
maintained.

16. ADVANTAGES
Can be used for badly broken
down crown
Can be placed with poor isolation
Economical
Full coverage-prevents recurrent
decay
Acceptable for both patient and
dentist

17. disadvantages
The aesthetics is not fair

18. composition
Stainless steel
crown
17-19% chromium
10-13% nickel
67% iron
4% minor elements

19. Nickel base crown
72% nickel
14% chromium
6-10% iron
0.04% carbon
0.35% manganese
0.2% silicon

20. Factors to be considered in pre-operative
evaluation
Dental age of the patient
Co-peration of the patient
Motivation of the patient
Medically compromised/disabled
children

21. Clinical procedure
Evaluate the
preoperative occlusion
•Take the alginate impression of
U/L jaws.
•Pour the cast with dental stone
•Note the dental midline and the
cusp fossa relationship bilaterally

22. Selection of crown
•The correct size crown is
selected by the M-D
dimensions of the tooth to be
restored using Boley gauge.
•To produce steel crown
margins of similar shape
examine the contour of
gingiva of the buccal &
lingual marginal gingiva.

23. Tooth preparation
L.A. should be
administrated
Isolation by
rubber dam or
cotton rolls
Remove the
decay

24. Reduction
Occlusal reduction
A 69L or 169L bur is used to reduce the occlusal
surface by 1.5-2.0mm .

26. Proximal slices
place the wooden wedges in the
inter proximal embrasures, the 69L
bur is moved B-L across the
proximal surface.

27. Buccolingual reduction
Reduction of buccal and lingual surface
is minimal
Round off all the line angles
It is done by using side of bur

28. Initial adaptation of crown
The crown should be of a correct length and its
margins should be adapted closely to the tooth.
For shaping the crown margins mark 3 light
points on the metal at the (mesiolingual, lingual
and distolingual)and at (mesiobuccal, buccal,
distobuccal) surfaces at the crest of respective
marginal gingiva without compressing the
marginal gingiva.
Final finished margins are placed
approximately 1mm below these marks.

29. Seating the crown
Now the crown is tried on the
preparation by seating the lingual
first and applying pressure in a
buccal direction so that the crown
slides over the buccal surface into
the gingival sulcus.
Resistance should be felt as the
crown slips over the buccal bulge.

30. Crown contouring
Initial crown
contouring is
performed with a114
plier (ball and socket
plier) in the middle
1/3rd of the crown to
produce belling
effect
This will give the
crown more even
curvature

31. This is very important to the
gingival Health of the
supporting tissue.
Using the no.417 crimping
pliers the crown is crimped in
the gingival third.
After completion of crimping
there will be gradual bend in
the gingival third of crown.
The use of crimping is for the
protection of soft tissues.

32. Uncrimped v/s crimped

33. Checking the final adaptation
of the crown
The crown should be replaced on the
preparation after the contouring procedure
to see that it snaps securely into place.
The occlusion should be checked at this
stage to make sure that the crown is not
opening the bite or causing a shifting of
mandible into an undesirable relationship
with opposing teeth.

34. Finishing and
polishing
Accumulation of plaque and
inflammation of gingiva is
commonly seen in practice of
restorative dentistry due to rough
and unpolished restoration.
To avoid these complications
crown should be polished prior t o
cementation with rubber wheel to
remove all scratches.

36. Radiographic confirmation of
the gingival fit
Before cementation
a bitewing is taken to
verify proximal
marginal integrity

37. Cementation
SSC should be cemented
only on clean dry mouth,
isolation of teeth with cotton
roll is recommended.
Rinse and dry the crown
inside & out side and prepare
to cement it.
A zinc phosphate,
polycarboxylate or GIC is
preferred.

38. Before the cements set ask the
patient to close into centric occlusion
by applying pressure through a cotton
roll and confirm that the occlusion has
not been altered.

39. Remove the excess
cement by an explorer or
scaler & for interproximal
area can be cleaned by
passing dental floss
through them.

40. result

41. Confirm occlusion

42. Stainless steel crown modifications
In 1971, Mink & Hill report several way
of modifying the stainless steel crown
when they are either too large or too
small
1. Undersize tooth or the oversize
crown.
2. Oversize tooth or undersize crown.
3. Deep subgingival caries.
4. Open contact.
5. Open-faced stainless steel crown.

43.  Interproximal
ledge.
 Crown tilt.
 Poor margins.
 Inhalation or
ingestion of crown

44. conclusion
The stainless steel crown is in
the superior durability and
longevity to class II amalgam
in primary teeth

45. reference
Dentistry for the child and adolescent 9th
edition , McDonald
Text book of pediatric dentistry 3rd edition, S.G
damle
Principles and practice of pedodontics 2nd
edition , arathi rao
Text book of pediatric dentistry 2nd edition,
nikhil marwah
Text book of pedodontics 2nd edition
shoba tandon

46. Hand book of pediatric dentistry , 3rd
edition, angus c cameron and richard p
widmer
Clinical pedodontics , 4th edition, finn
Fundamentals of pediatric dentistry, 3rd
edition, richard j mathewson and robert e
primosch
Pediatric dentistry principles and practice,
MS muthu and N sivakumar