Need Help In Prothodontics!!!

[gag]

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hi!one of the question says that if at an established vertical dimension of occlusion...max tuberosity inteferes with retromolar pad area...and the answer says.......the treatment modality is to limit the posterior extension of the mandibular denture to avoid that interference......but dont u think if we decrese the area coverage of mandibular denture.that will result into decresed retention ,so why cannot we reduce the tuberosities surgically to avoid it...and the other is ..what canbe the cause of midline fracture in max CD,..........
1.excessive resorption of the ridge
2.acrylic being too thin
3.patient biting too hard
4.use of poor garde of acrylic
5.acrylic being too thick
what can be the possible answer to this and why?
and the last one is..what is the direction of resorpyion of lower ridge
can anyone plz answer to these 3 querries.......thanks .gag

 

[toothie]

the answer is right .if at an established vertical of occlusion , there is inteference , clinically we used to make a v shaped cut made at the retromand area of mand to prevent the base plates from inpinging .so iguess the closest answer is limit the posterior extension .
its not really reducing the coverage area so retension is not lost.
if tuberosities are adequate one cannot surgically correct them .why go in for a surgical procedure when one can manage without compromising retension.

the answer ro midline fracture of maxillary denture is thin acrylic....

the resorption pattern for mand is lingually and backwards .

hope these answers ure questions.
toothie

hi!one of the question says that if at an established vertical dimension of occlusion...max tuberosity inteferes with retromolar pad area...and the answer says.......the treatment modality is to limit the posterior extension of the mandibular denture to avoid that interference......but dont u think if we decrese the area coverage of mandibular denture.that will result into decresed retention ,so why cannot we reduce the tuberosities surgically to avoid it...and the other is ..what canbe the cause of midline fracture in max CD,..........
1.excessive resorption of the ridge
2.acrylic being too thin
3.patient biting too hard
4.use of poor garde of acrylic
5.acrylic being too thick
what can be the possible answer to this and why?
and the last one is..what is the direction of resorpyion of lower ridge
can anyone plz answer to these 3 querries.......thanks .gag

 

[gag]

hi! thanks a lot forr ur help.......gag

 

[toothie]

another thing , when processing the denture , certain amount of polymerisation shrinkage occurs and creates stresses in the centre of the denture .
thus the thickness of the denture should be adequate in the midline/ centre area.
another thing if the thickness is too much that leads to difficulty in speaking and pronounciation.....
hope this helps ,
toothie

 

[Dreamyeyes]

Hi,
Hope everyone is preparing hard for part 2.I wish to know what Do we mean by Plane of orientation.? How does that Differ from plane of occlusion? Secondly what do we mean by Occlusal Clearance? Thanks in advance for the reply.

 

[toothie]

Hi,
Hope everyone is preparing hard for part 2.I wish to know what Do we mean by Plane of orientation.? How does that Differ from plane of occlusion? Secondly what do we mean by Occlusal Clearance? Thanks in advance for the reply.

occlusal clearance means the amount of reduction done on the occlusal surface during crown preparation . it depends on the type of material being used.

 

[Dreamyeyes]

Hi Toothie,
Thanks for the reply.Does that mean occlusal reduction& occlusal clearance is one and same thing?Thanks again.
Take care,

 

[toothie]

Hi Toothie,
Thanks for the reply.Does that mean occlusal reduction& occlusal clearance is one and same thing?Thanks again.
Take care,

occlusal reduction is the amount of reduction done.
occlusal clearance is the clearance present after reduction.
one can do occlusal reduction but that doesnt mean that the occlusal clearance is adequate......
i know my explanation isnt very clear.. i hope u understand what im trying to tell u.
toothie

 

[Dreamyeyes]

Hi toothie,
Thanks for the reply.I really appreciate u r efforts.

 

[gag]

hi there.i 've few more things to be clerified,.......hope u'll help............
.A reliable method of registering centric relation in construction of removable partial denturec is to use a..
1.wax record with remaining teeth in occlusion
2.face bow to transfer the max cast to articulator
3.record of all the remaining occluding srfaces in a wax wafer with the teeth in occlusion
4.record of all thre remaining occluding surfaces in wax wafer with the mandible in the terminal hinge position and the teeth just out of occlusiowhich one is the right answer?thanks in advance..gag

 

[gag]

hi!the occlusal plane is an imaginary surface which touches the insical edegs ofincisors and tips of occludinfsurfaces of posterior teeth.plane of orientaion is under the control of dentist while fabricating aCD.and plane of occlusion is detrmind most commonly by upper occlusal rim.......anteriorrly it should be parallel to interpupillary line and posteriorly it should be parallel to camper's line........hope this will help u.......gag

 

[Dreamyeyes]

Hi Gag,
Thanks for clearing my doubt.Take care,
BYE.

 

[toothie]

hi there.i 've few more things to be clerified,.......hope u'll help............
.A reliable method of registering centric relation in construction of removable partial denturec is to use a..
1.wax record with remaining teeth in occlusion
2.face bow to transfer the max cast to articulator
3.record of all the remaining occluding srfaces in a wax wafer with the teeth in occlusion
4.record of all thre remaining occluding surfaces in wax wafer with the mandible in the terminal hinge position and the teeth just out of occlusiowhich one is the right answer?thanks in advance..gag

i think the answer will be record the remaining occluding surfaces in wax wafer with teeth in occlusion.
CO may not co incide with CR when teeth are present .
while taking Jaw relation for complete denture , we presume that CR=CO, but if u remember the posselts envelope of motion CR is a bit post to Co and if the patient has numerous teeth present occlusion is the best giude .
hope this helps.
toothie