lecture 6

Question 1

what is grade three mobility

Answer 1

when you can displace the tooth apically and vertically

Question 2

physiologic movement is how much?

Answer 2

.2mm or less

Question 3

what are the different grades of mobility

Answer 3

grade 1= .2mm-1mm
grade 2= 1mm-2mm
grade 3=2mm and or vertical movement

Question 4

why cant we test mobility with our fingers?

Answer 4

bc we have fat pads which move so we cant examine the movement accurately

Question 5

what is fremitus

Answer 5

tooth displacement created by patients occlusal force

Question 6

overloading the system with too much force can cause breakdown in the weakest link of what structures?

Answer 6

TMJ, teeth, or attachment apparatus

Question 7

what is the difference between increasing mobility and increased mobility?

Answer 7

increasing means it is increasing over time, more of an occlusal trauma problem.

Question 8

some clinical signs of occlusal traumae

Answer 8

increasing trauma, rx- widening of PDL, loss of LD, angular osseous defects, root resorption, altered trabecular pattern, wear facets crazing etc

Question 9

certain increase in mobility can be accepted provided what

Answer 9

it does not disturb masticatory function of comfort of the patient

Question 10

as we get older PDL width increases or decreases?

Answer 10

decreases in width- important to think of this when examining

Question 11

if you have a lower COR what would you expect to see with mobility?

Answer 11

increased mobility

Question 12

definition of occlusal traumatism

Answer 12

describes patholgic or adaptive changes which develop in the periodontium as a result of undue force produced by masticatory muscles

Question 13

process of occlusal force causing occlusal trauma

Answer 13

forces cause loss of alveolar and crestal lamina dura, leading to widening of PDL which presents as increasing mobility over time

Question 14

if tooth is in light force adaptive range what occurs if tooth is still recieving light force

Answer 14

healing will occur, however PDL will remained widened. mobility remains increased but is not increasing

Question 15

if tooth has undergone some occlusal trauma in light force and is taken out of occlusion what occurs?

Answer 15

PDL returns to normal width through bone apposition at alveolar lamina dura .

Question 16

what happens with heavy forces

Answer 16

exceeds adaptive capacity and tooth will become increasingly mobile and never adapt

Question 17

what kind of occlusal trauma is ortho?

Answer 17

primary

Question 18

what is primary occlusal trauma

Answer 18

lesion of attachment apparatus caused by excessive force to normal amount of support. lesion is reversible and repairable

Question 19

what is trt of primary occlusal trauma? and what occurs after?

Answer 19

reduction of force to okay force. often by altering occlusion. lesion resolves, pdl returns and mobility reduced

Question 20

what is secondary occlusal trauma?

Answer 20

normal forces on a weakened periodontium by periodontal disease. lesion is usually not reversible or repairable

Question 21

secondary trauma is caused by what?

Answer 21

loss of adequate bone support rather than excessive force like primary

Question 22

trt for secondary occlusal trauma involves what?

Answer 22

splinting

Question 23

why is it important to check patients for periodontitis before ortho trt?

Answer 23

bc high forces can cause in increase in periodontal breakdown with increased occludal force often seen in ortho trt