L12 Metal Try in and Tx plan

Before adding denture teeth you need to do a metal try in and tx plan

you need to check the —- and —-

fitting occlusion

when you are doing metal framework seating in the patient, and it doesnt fit, what do you use to adjust it and what exactly do you adjust.

chloroform

adjust the guiding planes and the minor connectors

after you check to see the metal framework seating, what do you check next?

occlusion

when checking the occlusion, you have to check with —- and ensure that the —- are the same and maintained

mylar original contacts

the metal framework shower be higher or lower than the contact point or elese you will get ,….

lower , open

when is the only time you will have framework higher and therefore a little space

when you are changing the vertical occlusion

What do you do after you check the fit and the occlusion

you mount the casts

what do you put on the metalframework on the edentulous areas after you make the cast and put the metal framework on

record base

what are the objectives of putting the record base on the metal framework on the edentulous areas

better contact with the tissue

supports the partial wax rim for a bite reg

you need good base contact on tissue, but not —-

complete extension of the base

what is the purpose of putting the wax rim on the record base on the metal framework on the cast

take BR

the purpose of the wax base and record base is to —— only ! so its ok record base is shorter than outline form the final prosthesis does not become short. when mounting, the final prosthesis will follow the location of the vestibule lcoation.

mount the cast ONLY

The —- will cover all the vestibule and the final pear shaped pad. but when mounting, it could be shorter and doesnt need to cover the fulloutline form

final denture outline .

what are the objectives of the partial teeth try in

correct arrangment of teeth

check the occlusion and remount if needed - bilateral and max co contact

protrusive record if necessary

obtain patients approval (esthetic and function)

good base contact on the tissue, but not compelte extension of base

when the teeth are being tried in, is the denture processed yet?

no

when doing partial teeth try in, do you need good base contact on the tissue? how about complete extension of base at this point?

yes, no

now afer metal framework check and adding the wax and teeth from lab, you check the fitting in the patient mouth again. now you insert the rpd

sharp edges on the resin bases seen often most adjacent —-

to the natural teeth

the sharp edges on the resin bases must be —-. MAKE CERTAIN THESE EDGES ARE NOT —-

rounded, undercut

a compelte denture can —— undercuts of the edges on the resin bases, but a RPD will not ——.

slide over the undercuts , rpd will not slide over the resin undercuts because it has a rigid metal framework with a fixed path of insertion.

undercuts are often see in the —- and in the —-

B tuberosity flanges , DL flange

Sharp edges on the RPD resin base should be rounded and must not create undercuts, especially near natural teeth. Unlike complete dentures, RPDs cannot slide over undercuts because of their rigid framework, so any undercuts that interfere with insertion must be removed or relieved. Retention in RPDs comes from clasps (not border seal), so flange extensions can be reduced if needed to avoid undercuts.

if there are undercuts that interefere with the insertion, the undercuts are —- or the —- are shortened

reduced, flanges

in situations where guiding planes are mostly resin, make certain no —- are present

undercuts

for rpd do we need border sealing

no

cd gets retention from border sealing but for rpd, the border sealing is not needed bcause most retention comes from the —-

direct retainers

what partial do we use if the occlusion interach is <3-4mm

metal base partial bc not enough room for resin

what are the adv of metal base partial

• inherent —- of material

• superior —- interchanges between ——

• minimal —- needed

cleanliness

temperature (feels more real bc u can feel temperature of what ur eating)

interocclusal space

what are disadv of metqal base partial

— adjustment difficult

reline/rebase are ——

— impression technique not available

post insertion

infeasible

functional (you dont need fucntional impression because u cant do reline rebase sine mtal)

before making the metal , the base tissue side registration has to be accurately registered so u dont have to minimize inaccurate contact with base side because of inability of relining process

what is the adv and disadv of having premolar and molar in rpd

adv more stailbity

disadv more cost because require endo tx and surveyed crown

In tooth born partial such as class III and IV, rests can be placed —— as long as they direct occlusal force along hte long axis of the abutment tooth

any position

in tooth born partial, all the support are from the

abutments

in tooth borne partial, what three things shoudl be maximized

retention bracing reciprocation

in extension base partial, —- is critical to design

rest position

— shared between the edentulous denture bearing surfaces and the abutment through — and —-

support

residual ridge and occlusal rests

residual ridge and occlusal rest in class i and ii extension base partial help share —- between edentulous denture bearing surfaces and the abutments

support

the designs for extension base partial provide for — control

stress

the — determines the axis of rotation on extension base partial

rest positions

for distal extesnion base side clasps, they have to be carefully designed and u use —-

stress releasing clasps like rpa rpi combo

rotation clasp has — POIs

2

which one is the rigid retainer. what is the other one

A,

is the other terminal rest? normal clasp like akers, conventional clasp direct retainer?The rest that seats last

• Located on the opposite side of the edentulous area

• Usually associated with a conventional (Akers) clasp

when making anterior posteiror, change— tilt to make proximal surface even out and prep. rotation clasp you are not making flat proximal plane

AP

you need a very rigid connector in —- and —- only

proximal surface and rest seat only. no retentive arm in front? idk what my notes mean

Fundamentals and biomechanics

Definition of rotational path: unlike a standard rpd, it is seated by first engaging front framework into —- , followed by rotational movement to seat the back of the prosthesis

anterior undercut

dual path concept: the first path involving a —- gains access to gingival undercut that would be blocked if approached via a —- vertical path

gingival undercut , straight

elimination of clasps: by using —- te to engage an undercut, you can eliminate clasp arm in the esthetic zone

rigid plate

rigid retainers: retention is gained by the —- component of the framework itself. this differs from conventional rpds where retention relies on the —- to bypass a HOC

rigid

flexibility of a metal arm

success if 100% dependent on the —-, you are not just looking for a single path, you are identifying a —-

surveyor. you are not just looking for a single path, you are identifying a curved arc of insertion

thge top shows poi from —- retainer and the bottom shows POI of ——

flexible conventional i think

rigid retainer

what is A, B?

rigid retainer of rotational framework

terminal rest

• The rest that seats last

• Located on the opposite side of the edentulous area

• Usually associated with a conventional (Akers) clasp

special features of the rotational framework:

“initial” rest: the first part of the framework to seat. this rest acts as a —-

center of rotation (fulcrum)

which feature of rotational framework is the first part of the framework to seat and acts as a fulcrum center of rest

initial rest

— is the portion of the framework that enters the undercut first. because it is rigid, it provides exceptional stability

rigid retainer

— , seats last and is associated wiht a conventional clasp assembly on the opposite end of the edentulous space to lock the rotation in place

terminal rest

clinical indications and preparations

• in a long span class —, a rotational path allows rigid mesial plates of the anteiror abutments to provide retention, keeping anterior segmenet metal free on labial surface

iv

rotational path allows —- on the anterior abutments to provide retention and metal free on labial surface on class iv

mesial plates

rotational paths are ONLY FOR —- , CLASS — AND __. ONLY

tooth borne cases, class iii and iv

rest seat morphology: anterior rest seats must be shorter or longer? to ensure framework doesnt skid out of position as the posterior segment rotates down

longer

What are advantages of the tooth borne rotational clasps

reduced plaque accumulation by eliminating— that wrap around the tooth, lowering caries risk

because —-dont flex, rpd has less,—-ompared to conventional

clasp arms

rigid retainers , horizontal play

the limitations of the rotational frameworkis that unlike a gold or cobal chrome glasp arm, a rigid retainer can not be ——. if the fit is inaccuate you have to —-

adjusted chairside

remake

what is another limitation of the rotational framework: patient must be taught the specific — method for insertion. forceing the rpd staright down will result in trauma to the abutment teeth or a bent framework

hook and swing