T-Scan
for Dental Implants
Time
and Force measurements are important for implant prostheses
because:
1.
Forces on implant prostheses rise rapidly due to a lack of
mobility of the entire prosthesis resultant from no
periodontal ligaments present around implants. Poorly
directed and off centered forces will torque an implant
prosthesis inducing shear stresses to the supporting
implants.
In
a full arch implant restoration, if the force summation is
left anterior for example, then the left anterior region of
the prosthesis is overly depressed into the supporting
implants while the right posterior region is lifted away
from the supporting implants. This condition will persist
for as long as those forces are not mitigated through
corrective T scan guided occlusal adjusting to better center
the force summation within the center of all supporting
implants.
In
a distal extension prosthesis, excessive force concentration
on the implant prosthesis create rapid rises in pressure
gradients which can fracture surface dental materials,
excessively wear surface dental materials and the opposing
dentition, result in de-Osseointegration of one or more
supporting implants, and stop the natural teeth from
completely seating as the implant prosthesis will be come a
closure interference to the rest of the dentition.
2.
Timing becomes important on the distal extension prosthesis
because if the implant prosthesis is time premature to the
natural teeth, rapid pressure gradients rise, resulting in
the same sequelae listed above.
The
best scenario is to delay the occlusal contacts on the
implant prostheses by fractions of seconds (<.4 seconds)
after the natural teeth nearby make occlusal contact, and
the teeth reach near maximal occlusal force. This sets up a
purposeful late loading of the implant prosthesis such that
the pressure gradients on the prosthesis remain low to
moderate as the prosthesis makes complete occlusal contact.
Timing
the prosthesis to occlude after the teeth, mitigates
dangerous excessive pressure gradients to develop on the
implants and the dental materials.
