محاضرة 37 وصل نهاية شيت
Components of Removable Partial Denture
للدكتور الصالحين ريموف ❤
ملاحظة:
التسجيل للمجموعة الاولى
Components of Removable Partial Denture
للدكتور الصالحين ريموف ❤
ملاحظة:
التسجيل للمجموعة الاولى
Forwarded from 𝑴𝒐𝒉𝒂𝒎𝒆𝒅 𝒀𝒐𝒔𝒆𝒇
الملاحظات المهمة في شيت ال Components of Removable Partial Denture :
Tooth-tissue supported
(Class I, II)
Tooth supported
(Class III, IV).
Acrylic resin denture base can be relined , while metalic denture base can't be relined.
Retentive arm is longer and more taper so it can be felxible and this means it have more retention this will make it stress breaker.
Terminal of retentive arm should be felxible and below the survey line (undercut) it's the only one in all components.
Flexible means tooth to enter the under cut without causing pressure on the tooth.
Reciprocal arm should be rigid above survey line (non undercut) it's main function is reciprocation than stability.
Riciprocation is effect of retentive arm on the tooth is countored by reciprocal arm and prevent tilting of the tooth in case of Activation.
Activation is when the patient is try to wear or remove the partial denture causing the retentive arm to move above the under cut area causing pressure on the tooth equaled by the reciprocal arm.
Passivity is when the clasp is place on the abutment tooth there is no pressure on the tooth and retentive arm is below the under cut.
Occulsal direction is away from tissue and gingival direction is toward the tissue.
There is Occulsal and cingulum and incisal rests.
Encirclement function is prevent tooth movement.
Attachment is used with class IV.
Aker clasp is used with class III
and not used with class I , II because rest adjacent to Edentolous space and used with tooth that is not tilted.
Saddle is Edentolous space.
Reverse aker clasp is used with class I, II and it's retentive arm is directed away from the Edentolous space Unlike Aker clasp which is toward the Saddle.
Distal Extension is Free sadle (tooth-tissue supported).
Reinforcing arm is reciprocal arm.
Ring clasp is used with isolated tilted molars.
Adjacent to Edentolous space it's used with class I , II.
Hairpin clasp is used with class I , II.
Embrasure clasp is used with class II , III when there is no modification and it's function cross arch stability.
Multible clasp is used with class I , II.
Combination clasp have retentive arm is gingival approaching while the reciprocal arm is occulsal approaching.
RPI represnt
R : mesial Rest
P : Proxmial Plate
I : I-bar.
RPA represnt
R : mesial Rest
P : Proximal Plate
A : Aker clasp.
RPA is used in soft tissue undercuts and high frenal attachements when RPI can't be used.
Back action and reverse back action clasps are used with class I , II and there are both have a single arm when Back action used with premolar buccally tilted while Reverse back action is attached to buccal side.
Extended arm clasp is used when primary abutment tooth doesn't have undercut.
Stress break action:
1.All gingival approaching clasps ( Bar type clasp + RPI clasp)
2.Combination clasp
3.Ring clasp
4.Wrough clasp
5.Extended arm clasp
6.Back action clasp
7.Reverse back action clasp
Splinting action:
1.Multiple clasp
2.Extended arm clasp
Single arm clasp:
1.Ring clasp
2.Back action clasp
3.Reverse Back action clasp
Gingival approaching clasp:
1.Bar type clasp (I , T , Y bar)
2.RPI
Occulsal approaching clasp:
1.Aker clasp
2.Reverse Aker clasp
3.Ring clasp
4.Hairpin clasp
5.Embrasure clasp
6.Multiple clasp
7.RPA
8.Back action clasp
9.Revers back action clasp
10.Extended arm clasp
Tooth-tissue supported
(Class I, II)
Tooth supported
(Class III, IV).
Acrylic resin denture base can be relined , while metalic denture base can't be relined.
Retentive arm is longer and more taper so it can be felxible and this means it have more retention this will make it stress breaker.
Terminal of retentive arm should be felxible and below the survey line (undercut) it's the only one in all components.
Flexible means tooth to enter the under cut without causing pressure on the tooth.
Reciprocal arm should be rigid above survey line (non undercut) it's main function is reciprocation than stability.
Riciprocation is effect of retentive arm on the tooth is countored by reciprocal arm and prevent tilting of the tooth in case of Activation.
Activation is when the patient is try to wear or remove the partial denture causing the retentive arm to move above the under cut area causing pressure on the tooth equaled by the reciprocal arm.
Passivity is when the clasp is place on the abutment tooth there is no pressure on the tooth and retentive arm is below the under cut.
Occulsal direction is away from tissue and gingival direction is toward the tissue.
There is Occulsal and cingulum and incisal rests.
Encirclement function is prevent tooth movement.
Attachment is used with class IV.
Aker clasp is used with class III
and not used with class I , II because rest adjacent to Edentolous space and used with tooth that is not tilted.
Saddle is Edentolous space.
Reverse aker clasp is used with class I, II and it's retentive arm is directed away from the Edentolous space Unlike Aker clasp which is toward the Saddle.
Distal Extension is Free sadle (tooth-tissue supported).
Reinforcing arm is reciprocal arm.
Ring clasp is used with isolated tilted molars.
Adjacent to Edentolous space it's used with class I , II.
Hairpin clasp is used with class I , II.
Embrasure clasp is used with class II , III when there is no modification and it's function cross arch stability.
Multible clasp is used with class I , II.
Combination clasp have retentive arm is gingival approaching while the reciprocal arm is occulsal approaching.
RPI represnt
R : mesial Rest
P : Proxmial Plate
I : I-bar.
RPA represnt
R : mesial Rest
P : Proximal Plate
A : Aker clasp.
RPA is used in soft tissue undercuts and high frenal attachements when RPI can't be used.
Back action and reverse back action clasps are used with class I , II and there are both have a single arm when Back action used with premolar buccally tilted while Reverse back action is attached to buccal side.
Extended arm clasp is used when primary abutment tooth doesn't have undercut.
Stress break action:
1.All gingival approaching clasps ( Bar type clasp + RPI clasp)
2.Combination clasp
3.Ring clasp
4.Wrough clasp
5.Extended arm clasp
6.Back action clasp
7.Reverse back action clasp
Splinting action:
1.Multiple clasp
2.Extended arm clasp
Single arm clasp:
1.Ring clasp
2.Back action clasp
3.Reverse Back action clasp
Gingival approaching clasp:
1.Bar type clasp (I , T , Y bar)
2.RPI
Occulsal approaching clasp:
1.Aker clasp
2.Reverse Aker clasp
3.Ring clasp
4.Hairpin clasp
5.Embrasure clasp
6.Multiple clasp
7.RPA
8.Back action clasp
9.Revers back action clasp
10.Extended arm clasp