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yardbellAI and Robotics

Nov 14, 2013 (3 years and 9 months ago)

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Simodont



Training in virtual reality to prepare for the reality



Current educational
circumstances



Golden standard from the “best” preparation.


Criteria


inter and intra observer reliability low.


Mental model developed on preparation model on
plastic teeth.


Internal model not based on pathology.


Problem solving is taught as a separate skill.


Only in the clinic problem solving, pathology and
preparation design are integrated.




Why change?


Educational reasons



-

improve integration theory and practice


-

process and outcome evaluation


-

incorporation of problem solving in

preclinical training


-

practice in realistic context closing the

gap to the clinic



Why change?


Practical reasons


-

reduction of maintenance costs


-

no waste of materials


-

no water problems ( legionella)


-

unlimited availability of practice
material



Practical skill development
and caries treatment


Accurate realistic 3D simulation of both manual
dexterity and pathologic concepts.

Proper haptics and realistic images. Realistic
mental modeling, muscle memory, proprioceptive
training.


Integration of existing and present knowledge.

This is the case, why are you going to do what and
how are you going to do it?


Realistic interaction with the virtual patient


Simulation of space limitations (tongue, cheek) and
patients perceptions.

Advantage of complete
virtual imitation


Integration of techniques and theory.


Unlimited practicing in a safe and almost real
-
life
situation.


Time and partially space independent ( lap top work
station).


Level of skill can be easily adapted.


Development from skills to competencies


Saving of materials, equipment and staff.


Borders of the virtual
dimensions


Complete patient.


Complete oral cavity.


Dental arch(es) with soft tissue.


Dental arch(es) only.


Single tooth.

Haptic
feedback

Stereo

Projection

Course

ware

3D models of real teeth

System borders selected

for
Simodont
version I


Realistic force feedback.


Realistic imaging.

-
resolution of 3D models.

-
hardness and color of tissue structures.

-
stereo imaging

-
collocation of image and haptics .


Dental arch(es) only.


Clinic

Patients

Preclinic

lab

Simodont

Simodont

Preclinic/lab

Clinic

Patients

Purpose of the study


To investigate if students without
any dental experience practicing at
the Simodont will develop skills
transferable to reality at a similar
level as students practicing in the
traditional preclinical setting

Experiment

S (n=10)

P (n=10)

C (n=8)

Day 1

test + practice (2x30)

test + practice (2x30)

test

Day 2

practice (3x30)

practice (3x30)

Day 3

test + practice (2x30)

test + practice (2x30)

test

Day 4

practice (2x30) + test

practice (2x30) + test

test

Design


Students practice after an initial
test their manual dexterity for
handling a dental bur either on the
Simodont or with a real bur on resin
plates.


Thereafter they perform a similar
test on plastic blocks

20

11/14/2013

Courseware

Courseware

Courseware

Courseware

Criteria

Preparation border within 1
st

and 2
nd

circle


Wall perpendicular to the bottom and outer surface.


Bottom within certain level and flat





Circle
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
1
2
3
Timepoint
Assessment
Control
Phantom
Simodont

Kruskall Wallis Control vs Ph and Simodont p< .05

Time point 1 vs 3 Ph, Simod p<.05

Total
0.0
2.0
4.0
6.0
8.0
10.0
12.0
1
2
3
Timepoint
Assessment
Control
Phantom
Simodont

Kruskall Wallis Control vs Ph and Simodont p<.05

Time point 1 vs 3 Ph

Simo p< .05

Conclusions


Practicing resulted in a better
performance than without practicing.


Skills transfer from the Simodont to
reality was equal as from reality to reality.


Practicing after the second test did not
show any improvement probably due to
reduced concentration and fatigue

Clinic

Patients

Preclinic

lab

Simodont

Simodont

Preclinic/lab

Clinic

Patients

Decision strategy in new
development


Innovation or evidence, what first?

Thanks



p.wesselink@acta.nl