TMJ and Third Molars (Nelson) Flashcards
What is the name of the cohort study that was done on pts that had ortho and no 3rd molar extraction?
“Pressure from behind” theory
What did the Agnes study, which had four groups of pts treated with ortho who all had varying wisdom tooth presentations, show?
All the pts had some type of relapse with and without 3rd molars
What is the standardized way to count anterior mandibular crowding?
Irregularity index
Does third molar eruption cause crowding?
No
What happens to the mandibular arch length over time in all patients?
Decreases over time
What is the only way to prevent mandibular anterior crowding due to mandibular arch decrease?
Wear a retainer
What is the evidence pyramide starting at the bottom and going to the top
(Bottom) Ideas/opinions Case reports Case series Case control studies Cohort studies Randomized trials Meta-analysis and systematic review (Top)
What is the term for a collection of reports on the treatment of individual patients or a report on a single patients. They have no control group to compare outcomes with so they have no statistical validity?
Case series / case reports
What is the term for studies where pts with specific conditions are compared to those without the condition using medical records or patient recall. Statistical relationships are not as reliable because they do not show that one factor
caused something?
Case control studies
What is the term for a study taking a large population and follows pts that have a specific condition or receive a certain treatment over time and compare them with another group that either does not have the condition or that does not have the treatment being studied. Observational . Looks at a group and then makes an
assessment of the outcome based on the data?
Cohort study
What is the term for carefully planned projects that study the effect of a therapy on patients. Normally use randomization and blindness as methods to reduce potential for bias and
have control groups?
Randomized controlled clinical trial
What focuses on a clinical topic and answers a specific
question using an extensive literature search for studies
pertaining to the clinical topic and reviews, assesses and
summarizes the results. Big with the Cochrane?
Systematic review
What thoroughly examines a number of valid studies on
a topic and combines the results statistically to make
them into one large study?
Meta-analysis
A systematic review showed that a majority of studies showed ortho did not increase the prevalence of TMD except for what signs?
Mild signs only
Did the systematic review show that clicking and popping indicated TMD?
No. Clicking and popping DO NOT mean TMD.
