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Review of orthodontic principles
1.
2. 1st Principle
• The same brackets, bands, and wires may
(and probably will) result in different
treatment responses in different patients
• Most of the differences in response center
on vertical changes
• It is possible (and, in fact necessary) to
predict the treatment response
19. Back to #1
• The same brackets, bands, and wires may
(and probably will) result in different
treatment responses in different patients
• Most of the differences in response center
on vertical changes
• It is possible (and, in fact necessary) to
predict the treatment response
20.
21.
22.
23.
24.
25.
26. Conclusion
• Even though molar relationship and
crowding are similar, every aspect of
treatment should be different in these
cases.
-bracket positioning
- extraction/non-extraction decision
- arch wires and mechanics
- retention
27.
28.
29. 2nd Principle
• The worst mistake an orthodontic
practitioner can make is to cause
excessive bite opening in open bite
patients
• Not treating open bite patients make it
impossible to violate this rule
-Case selection
33. Questions
• What will happen
during initial leveling
and aligning?
• Could anything have
been done to prevent
this?
34.
35.
36. 3rd Principle
• Every treatment decision you make is
based on the vertical needs of the patient
-Bracket position, what teeth are
bracketed, what wires to use, extraction
vs. non-extraction, mechanics used, and
retainers used are all greatly influenced by
a patient’s vertical needs.
40. What is different?
• Bracket positioning
-gingival in anterior
-occlusal in posterior
• Bracket positioning
-incisal in anterior
-gingival in posterior
51. 4th Principle
• Decalcification is the number one reason
orthodontic practitioners get sued. Make
sure all your patients have excellent oral
hygiene. If hygiene is not up to par,
consider early removal of the braces.
54. Prevention
• Good brushing
• Oral hygiene instruction and monitoring
• Fluoride mouth rinse
• Early braces removal
55. Special situations-white spot
lesions
• Studies show up to a third of all ortho
patients have some white spot lesions
• About half of all lesions remineralize in
6mo without any specific treatment
56. What NOT to do
• High concentration fluoride treatment
• This arrests remineralization
57. What to do
• Polish with casein calcium phosphate
materials (CPP)
-CPP is thought to stabilize and localize
calcium, fluoride, and phosphate at the
tooth surface in a slow-release amorphous
form, thus enhancing deeper
remineralization of white spot lesions
59. GC America-MI Paste
• MI Paste with RECALDENT™ (CPP-ACP)
has a proven clinical success record for
patients with increased caries risk and
white spot lesions. These include
orthodontic appliances, bleaching,
consumption of sports drinks and medical
therapies causing low salivary flow or
xerostomia.
60.
61. 5th Principle
• Check your patient’s molar relationship at
every appointment. This is the first thing
done at every orthodontic appointment.
• If the patient does not have a Class I
molar relationship, know how you are
going to get there, or have a reason why
the case will not finish with Class I molars.
62.
63. Class II Malocclusion : Class II malocclusion occurs when the mesio-buccal cusp of the
upper first permanent molar interdigitates mesial to the buccal groove or fossa of the lower
first permanent molar.
Ideal Occlusion
64.
65. Look at this 12 year old
• She is a growing
patient. Will she finish
in Class I?
72. Why are the molars ClassII?
• Upper bicuspid
extractions
73. Why was this treated this way?
• It is tough to fight
molar relationship in a
non-grower.
• That is the “good
reason” not to finish
with Class I molars.
74.
75.
76. 6th Principle
• Before initiating orthodontic treatment,
each patient should have a complete set
of records and a signed informed consent.
103. Comments
• Not enough finishing
– Poor interdigitation
• Midline discrepancy
– Left side still in Class II
• Bite still too deep
– Not handled properly during wire progression
• Poor anterior torque control
– Side effects of excessive Class II elastics
107. Why?
• Poor torque control
– Interincisal contact does not aid retention
• Overjet, midline discrepancy allow rotation
• Overbite problem was never resolved
108. 9th Principle
• Make sure all teeth are aligned before
progressing out of nickel titanium arch
wires.
109.
110.
111.
112. 10th Principle
• Standard of care dictates that a panorex
should be done on every patient 6-9
months into treatment. This x-ray is used
to check for root resorption. Failure to
discover root resorption is the 2nd most
common reason that orthodontic
practitioners get sued.
