Flashcards in trauma from occlusion Deck (37):
what is primary occlusal trauma?
Excessive force (e.g.: “high restoration”) to NORMAL periodontium
what is secondary occlusal trauma?
Normal (or excessive forces) Applied to a weakened periodontium
what is "fremitus"?
palpable vibrations or movement of a tooth, usually due to excessive contact with another tooth.
what are the 2 types of mobility caused by "teeth moving teeth"?
Fremitus and functional mobility
what is pathogenic migration? what causes
tooth displacement that results when the balance among the factors that maintain physiologic tooth position is disturbed by periodontal disease
T/F: pathogenic migration is a sign of unstable periodontium
what are the Possible Radiographic signs of occlusal trauma?
• Some may be due to extension of inflammatory periodontal disease without occlusal trauma as a factor
• Widened PDL Space and/or Thickened Rad. Lamina Dura
hypofunction and hyperfunction can both occur in ____________ bone
________ of trabecular bone is a result of a lack of occlusal forces
T/F: angular bone loss & furcations have been a proven result of occlusal trauma
May purely be due to tooth and bony anatomy and the progression of inflammatory periodontal disease
what is the Co-Destruction theory?
Occlusal trauma may be a co-destructive factor that alters the severity and pattern of inflammatory periodontal disease
T/F: occlusal trauma can allow periodontal disease to find a way into the PDL
what theory claims that: Occlusal trauma has no role in the severity and pattern of inflammatory periodontal disease progression
Advancing Plaque Front Theory
In trauma from occlusion, crushing of tooth against bone causes injury to the periodontal ligament at what sites?
at sites of pressure and tension
(can cause tipping of the tooth)
T/F: tipping of a tooth due to occlusal forces can result in inflammation
the necrosis of the PDL when pulled apart can cause inflammation
an injury from TFO without periodontitis results in what?
Injury results in acute (not plaque associated) inflammation
in TFO without periodontitis, PDL collagen fibers are destroyed ________
T/F: attachment loss is seen in a majority of TFO cases without periodontitis
no perio- no attachment loss
how do teeth adapt to TFO without periodontitis?
increased mobility, widened PDL Space
T/F: in patients with only TFO (no periodontal issues), occlusal therapy may diminish the signs of occlusal trauma
what types of occlusal therapy can be used to reduce Traumatic occlusal forces?
• Re-contour high filling to resolve problem
• Splint teeth together to reduce force
• Bite planes
what causes secondary occlusal trauma?
normal occlusal forces are placed on teeth with compromised periodontal attachment
T/F: occlusal trauma and periodontitis can occur on the same tooth, but can be completely independent of one another
its the "No co-destruction" type
what happens when you have Jiggling type occlusal forces with periodontitis?
inflammatory infiltrate occupied by occlusal trauma lesion.
before you can address the issues associated with traumatic occlusal forces, you must take care of any existing __________
what happens due to the Downgrowth of junctional epithelium during TFO?
Enhanced loss of connective tissue
if periodontitis merges with increased tooth mobility (due to TFO), you will have _____________
Downgrowth (apical migration) of pocket epithelium, and enhanced (accelerated) attachment loss are both characteristics of what condition?
(combination of perio and TFO)
T/F: If TFO and inflammatory periodontitis are separate (independent) processes, there will be enhanced attachment loss
there will be no enhancement of attachment loss
what are the reversible treatments for TFO?
Night Guard (bite plane)
Muscle relaxants (medications)
what are the irreversible treatments for TFO?
Occlusal adjustment by selective grinding
what are the indications for selective occlusal grinding?
1) Periodontal Occlusal Trauma
3) use prior to extensive treatments
4) Certain types of TMD
5) Certain wear patterns
when would you NOT want to use occlusal adjustment?
Non-ideal but tolerated occlusion
Patient in pain
If no suitable end point
T/F: No TMO repair can occur unless inflammatory periodontal disease is first resolved
Occlusal trauma superimposed on an existing periodontitis may under certain conditions accelerate _____________
when is Occlusal therapy in conjunction with periodontal treatment indicated?
when occlusal trauma is present