Lecture 4 Intraoral Scan Teeth Setup and Denture Design

Implant-supported final restoration vs Conventional complete denture

which one requires more accuracy

the threhold for the accuracy value of impalnt is a lot lower. denture even if u have 500 microns, its ok but for implant, doesnt fit at all if its off by 150 um.

implants

scientific evidence regarding accuracy of comercially available noncalibrated splinting and noncalibrated ISBs methods are limited. calibrated means that the implants are connected.

The noncalibrated techniques obtained accuracy values wtihin the clincially acceptable threshold of ——um

150 um

which has more errors? splinted or nonsplinted implants?

nonsplinted - bigger errors happens no matter which scanner is used

Bewteen the two groups: ncs ioc and nsisb, which one is splinted and which one is separate

splinted is the NCS = noncalibrated SPLINTED

NS is separate


the diagram is suggesting that NS-ISB (non-splinted implant scan bodies) showed greater discrepancies (more error) compared to the splinted groups (NCS-IOC).

But importantly, even though NS had more error, it was still within the 150 µm clinically acceptable range — meaning it may be less accurate, but not necessarily clinically unacceptable.

• NCS-IOC = Non-Calibrated Splinted – Implant-On-Connect (implant scan bodies are connected together before/during scanning, but not precisely calibrated).

• NS-ISB = Non-Splinted – Implant Scan Body (implant scan bodies are scanned individually without being connected).

Is this NCS-IOC or NS_ISB

splinted so NCS

noncalbirated splinted

• NCS-IOC = Non-Calibrated Splinted – Implant-On-Connect (implant scan bodies are connected together before/during scanning, but not precisely calibrated).

• NS-ISB = Non-Splinted – Implant Scan Body (implant scan bodies are scanned individually without being connected).

which one is ncs-ioc and which is ns-isb

ncs-ioc = left

NS-ISB = right

the —- (smaller or larger) location data scanned, the more accurate the data

smaller

the (smaller or larger) the area, the mroe error accumulate proportionate to the area

larger

label from right to left the amount of error that accumulates

25 50 100 150

label from oldest to newest

PIC, metric, Tupel, Micronmapper, Grammee

PMTMG

pic

metric

tupel

micromapper

grammee

what is this lol

what is the data showing

All of those are making less than 50 um which makes prosthesis for your data most accurate than any other method

Teeth placement

Central Incisor

For labial palatal inclination

Class I is ——- to ridge

Class II has —— inclination

Class III has —— inclination

Class I is perpendicular to ridge

Class II has palatal inclination

Class III has labial inclination

Central Incisor

what is the Mesial distal inclination

none

Central incisor what is the rotation

Soft = follow ——

Bold = —- flare

follow arch

distal flare NEVER MEDIAL FLARE (im assuming distal part more facial)

what is the length of central incisor

same length as ——

wax rim

For lateral incisors

what is the labial palatal inclination for

soft: lateral neck —- in or out

bold: —to occlusal plane

labial palatal inclincation

soft = lateral neck in

bold = perpendicular to occlusal plane

lateral incisors rotations

soft: —- flare

bold —— flare

medial flare

distal flare

what is the length of lateral incisors

soft:

bold:

soft 1-2mm less than rim

bold same length as wax rim

What are the three canine position rules

Rule 1: neck out incisal in (less for square)

rule 2: only mesial showing

rule 3: sagittal view the canine has to be vertical, right angle to occlusal plane. small mesial tilt is ok but never distal

What are the components to evaluate for mandibular anteiors

vertical overlap

horizontal overlap

anteroposterior inclincation in proximal view

inclincation of long axis

you need —mm gap between for mandibular anteirors

1mm

the height of the occlusal plane is —— of the pear shaped pad

½ way up

btw its 1/3 up the retromolar pad

for curve of spee what are the increments it goes up.

the height increases from premolars to molars __ ___ ____

0.5

1

1.5