10. Flashcards

Question

What can affect the occlusal condition? (5)

Answer 1

- Static occlusal factors - Orthopedical instability of the jaw - Acute changes in the occlusion - chronic changes in the occlusion - types of occlusal interferences

Answer 2

``` – Musculoskeletal anterior open bite – Displacement (deviation) from CR to MI of more tan 2mm – Absence of anterior guidance: interferences. – Overjet greater than 4mm – 5 teeth or more missing. ```

Answer 3

– Dynamic oclusal factors, like the prematurities, forces a sliding to reach the InterCuspalPosition. – Overexertion of the external pterygoid and intracapsular disorder of the TMJ, specially when subject to higher forces (ex: Bruxism) – Discrepancies of 2 to 3mm are one of the principal factors involved in a TMD

Answer 4

- Increase the muscular tone and it´s hyperactivity that can lead to symptoms of the elevator muscles due to aprotective co-contraction – Muscles develop a new way of avoiding the interferences – The patient generally adapts to the new situation. – If it becomes a chronical occlusal situation associated to the stress factor, a parafunctional activity can appear – Sleep bruxism is more associated to the stress and sleep alterations than with the apparition of acute interferences

Answer 5

``` – Occlusal interferences due to the migration of teeth adjacent/antagonist to an edentulous ridge – The apparition of a small interference, mantained over the time, can also be converted into a chronical one. – In those cases, there is a failure of the proprioceptive defensive system that was used to avoid the interference – In those situations, the mandible does not try to avoid the interferences, but unconsciously grinds the area creating the subsequent wear ```

Answer 6

``` The musculatory system tend to adapt to avoid the nocive contacts (adaptative reflex). More frequent when not associated to stress ```

Answer 7

A parafunction is developed by the patient for an increase of emotional factors (stress), that leads to the typical muscular hyperactivity associated to bruxism

Answer 8

Prematurites causing more than 2mm discrepancies -– The factor that is mostly associated to TMD, it creates an overloading of both pterygoid muscles or one of them – Pain during the palpation and functional manipulation of the inferior external pterygoid muscle

Answer 9

- Macro trauma | - Microtrauma

Answer 10

- intense and sudden force - Intracapsular disorders - Elongation of the ligaments and disc displacement

Answer 11

– Accident, practicing sports, a fight, etc... – Iatrogenic trauma: intubation during general anesthesia, complex tooth extraction,...

Answer 12

- Small repetitive forces over the same structures during a long period of time. - Ex; grinding teeth, bruxism - If associated to orthopedical instability in the IPC; high risk of elongation of the ligaments