a detailed account of the principles of tooth preparation with main reference from Shillingburg
The presentation is available on request. Mail me at apurvathampi@gmail.com
a detailed account of the principles of tooth preparation with main reference from Shillingburg
The presentation is available on request. Mail me at apurvathampi@gmail.com
this presentation has all the techniques in impression making in the fabrication of an RPD.
The presentation is available on request. Mail me at apurvathampi@gmail.com
self correcting anomalies in the development of occlusion. this ppt includes the anomalies of a child's developing occlusion which get corrected by itself in some time as the development continues. This includes Retrognathic mandible,infantile swallow,anterior open and deep bite,etc. these topics are important in BDS final examination
An inlay may cap none, or may cap all but one cusp.
Sturdevant’s 4th ed. page579
Inlays may be used as single-tooth restorations for proximo-occlusal or gingival lesions with minimal to moderate extensions
Shillingburg page 1
An inlay may be defined as a restoration which has been constructed out of mouth from gold, porcelain, or other material & then cemented into the prepared cavity of a tooth.
William McGehee pg410
A presentation on the instructions to be given to complete denture patients at the insertion appointment. Dealing with patients can be hard at times but with a proper approach, a strong rapport can be formed with the patient.
A concise and brief presentation on cleaning and shaping of root canals. Colorful and well pictured. Ideal for UG students and PG students to get a good understanding of BMP techniques.
this presentation has all the techniques in impression making in the fabrication of an RPD.
The presentation is available on request. Mail me at apurvathampi@gmail.com
self correcting anomalies in the development of occlusion. this ppt includes the anomalies of a child's developing occlusion which get corrected by itself in some time as the development continues. This includes Retrognathic mandible,infantile swallow,anterior open and deep bite,etc. these topics are important in BDS final examination
An inlay may cap none, or may cap all but one cusp.
Sturdevant’s 4th ed. page579
Inlays may be used as single-tooth restorations for proximo-occlusal or gingival lesions with minimal to moderate extensions
Shillingburg page 1
An inlay may be defined as a restoration which has been constructed out of mouth from gold, porcelain, or other material & then cemented into the prepared cavity of a tooth.
William McGehee pg410
A presentation on the instructions to be given to complete denture patients at the insertion appointment. Dealing with patients can be hard at times but with a proper approach, a strong rapport can be formed with the patient.
A concise and brief presentation on cleaning and shaping of root canals. Colorful and well pictured. Ideal for UG students and PG students to get a good understanding of BMP techniques.
partial veneer crowns /certified fixed orthodontic courses by Indian dent...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
Tooth preparation for full veneer crowns /certified fixed orthodontic course...Indian dental academy
The Indian Dental Academy is the Leader in
continuing dental education , training dentists
in all aspects of dentistry and offering a wide
range of dental certified courses in different
formats.
Indian dental academy provides dental crown &
Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit
www.indiandentalacademy.com ,or call
0091-9248678078
Metal ceramic and partial veneer crown/certified fixed orthodontic courses by...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
The cast metal restoration is versatile and is especially applicable to Class II onlay preparations. The process has many steps, involves many dental materials, and requires meticulous attention to prepration.
Tooth treatment planned to be restored with an intracoronal restoration, but the decay or fracture is so extensive that a direct restoration, such as amalgam or composite, would not be able to sustain or bear forces.
Additionally, when decay or fracture incorporate areas of cusp or remaining tooth structure that undermines perimeter walls of a tooth, an onlay might be indicated.
Posterior tooth preparations/dental crown &bridge course by Indian dental aca...Indian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
2. CONTENT
INDICATIONS
CONTRAINDICATIONS
ADVANTAGES
DISADVANTAGES
ARMAMENTARIUM
POSTERIOR PARTIAL VENEER CROWNPREPARATION
MAXILLARY PREMOLAR THREE QUARTER CROWNS
MAXILLARY MOLAR THREE QUARTER CROWN
MAXILLARY MOLAR SEVEN-EIGHTHS CROWN
MANDIBULAR PREMOLAR MODIFIED THREE QUARTER CROWN
ANTERIOR PARTIAL VENEER CROWN PREPARATION
MAXILLARY CANINE THREE QUARTER CROWN
PINLEDGE PREPERATION ON MAXILLARY CENTRAL INCISOR
3. Introduction
• An extracoronal metal
restoration that covers only
part of the clinical crown is
considered a partial veneer
crown.
• An intracoronal cast metal
restoration is called an
inlay or an onlay if one or
more cusps are restored.
4. • Partial veneer crowns generally include all tooth
surfaces except the buccal or labial wall in the
preparation. Therefore, these restorations
preserve more of the tooth’s coronal tissue than
does a complete crown.
5. • Buccolingual displacement of the restoration is
prevented by internal features (e.g., proximal
boxes and grooves)
• Can be used as single tooth restorations or as
retainers for a fixed dental prosthesis (FDP).
• They can be used on both anterior and posterior
teeth
• Because they cover less of the coronal surface,
partial coverage restorations tend to be less
retentive than complete crowns and also less
resistant to displacement
6. INDICATIONS
1) Intact buccal wall & well supported by
sound tooth structure.
2) Teeth with crown length that is average or
exceeds average.
3) Teeth with normal anatomic crown form,
i.e. without cervical constriction.
4) Anterior teeth with adequate labio-lingual
thickness.
7. CONTRAINDICATIONS
1) High caries rate
2) In short clinical crown because retention may
not be adequate.
3) In endodontically treated teeth or non-vital
teeth
4) In teeth that are proximally bulbous
5) Deep cervical abrasion
6) Teeth with extensive core restorations
7) Bell shaped teeth (severe cervical constriction)
8) Thin teeth or restricted faciolingual dimension
8. ADVANTAGES
1) Conserves tooth structure.
2) Easy access to supra-gingival margins for
finishing.
3) Less gingival involvement than with complete
cast crown.
4) Aesthetics are superior to that of the complete
crowns.
5) Complete seating of the restoration can be easily
verified during cementation.
6) Reduced pulpal and periodontal insult during
tooth preparation.
9. DISADVANTAGES
1) Retention is less than that of complete veneer
crown
2) Skillful preparation is crucial to avoid metal
display
3) Preparation is limited to teeth with normally
shaped, average length clinical crown.
4) It is not indicated for use in cases of non vital
teeth
12. MAXILLARY PREMOLAR THREE QUARTER
CROWNS
A. Occlusal reduction
B. Axial reduction
C. Groove placement
D. Bucco-occlusal contrabevel
E. Occlusal offset
F. Finishing
13. Occlusal reduction
Before any partial veneer crown preparation , mark
the proposed location of the margin of the completed
preparation on the tooth with a pencil.
14. Recommended minimum clearances for reduction
of a partial veneer crown preparation. Slight hollow
grinding of the lingual incline of the buccal cusp
results in an acceptable clearance with the least
display of metal.
15. Assess the amount of occlusal clearance in the
intercuspal position and in all excursive movements
of the mandible.
16. After verifying the alignment, remove tooth structure
between the guide grooves (with a smooth
continuous motion) and place a cervical
chamfer.
A periodontal probe placed in each groove should be
carefully viewed in both planes (mesiodistal and
buccolingual).
Axial reduction
17. Buccal wall are flared
to leave no
unsupported enamel
Occlusocervical height for a
proximal groove is 4 mm
Floor of the groove should be
flat and smooth, chamfer
extend cervically
18.
19. As the cervical chamfer extends closer to the
cemento-enamel junction, more axial tooth structure
is removed. Consequently, the deepest portion of the
groove (its pulpal wall) will be located slightly closer
to the center of the tooth.
20. THREE QUARTER CROWN FOR
MAXILLARY MOLAR
Some additional leeway may exist for groove placement
because more tooth structure is present on molars than on
premolars. Also, because of their less prominent position in
the dental arch, molars are less visible.
As a result, the mesioproximal flare can sometimes be
extended onto the buccal surface without incurring esthetic
liability.
21. MAXILLARY MOLAR SEVEN-EIGHTHS
CROWNS
The seven-eighths crown preparation includes, in addition to
the surfaces covered by the three-quarter crown, the distal half
of the buccal surface.
Therefore the mesial aspect of this preparation resembles that
for a three-quarter crown; the distal aspect resembles that for
a complete crown
A. Occlusal reduction
B. Axial reduction
C. Groove placement, flaring, contrabevel
24. Groove placement, flaring, contrabevel
Proximal groove placed Buccal groove with flaring of the
mesial groove
25. Connect the two grooves with a smooth contrabevel that
follows the ridge of the mesiobuccal cusp.
Mesial groove is smooth and has a
90-degree cavosurface angle
27. 1. Additional retention is required because of the shorter
crown lengths of mandibular teeth. This can be
obtained by extending the preparation buccally,
although because of their rather prominent position in
the dental arch, these teeth should be modified only
distal to their height of contour.
2. The axial surface that is not prepared (the buccal)
includes the functional cusp. This means that additional
tooth structure must be removed to provide sufficient
bulk of metal for strength.
28. Occlusal reduction
Place 0.8-mm depth grooves on the buccal inclines of
the lingual cusp and 1.3-mm grooves on the lingual
inclines of the buccal cusp.
.
29. Axial reduction
1. Mesial is prepared as three-quarter and seven-eighth
crown.
2. Reduce the distal surface as for a complete crown,
extending the preparation to the transitional line angle
and onto the buccal surface. However, it should not
extend mesially beyond the middle of the distal half of
the buccal surface, and the chamfer should not extend
too far cervically;
30. Finishing
• the grooves of the three-quarter crown should be
slightly buccal. Care must be taken so that the distal
groove is slightly closer to the center of the distal wall
(so the distobuccal line angle will not be undermined).
Mesial and buccal groove
31. The chamfer must be heavy enough to allow 1.5 mm of
clearance in the area of occlusal contact. A regular or
thick diamond is used to place the chamfer, which
should connect the grooves and provide a protective
"staple" linkage of alloy in the completed restoration.
39. Incisal offset and lingual pinhole
Anterior partial veneer crowns require a means of
reinforcement for preserving the casting's integrity. For
an anterior tooth, an incisal offset or groove is needed to
create a band of thicker metal to provide a "staple"
configuration. This provides additional rigidity and
resistance against bending of the casting.
40.
41. PINLEDGE PREPARATION
A pinledge is occasionally used as a single restoration,
generally to reestablish anterior guidance, in which case only
the lingual surface is prepared. More commonly, however, it is
used as a retainer for a fixed partial denture or to splint
periodontally compromised teeth.
.
Four unit FPD with modified
pinledge
Modified pinledge serving as a
retainer for a four unit FPD
42.
43. Indication
1. undamaged anterior teeth
2. high esthetic requirement
3. prepared on bulbous teeth
4. to establish the desired anterior guidance.
44. Contraindication
1. Patients with poor oral hygiene or a high caries rate
2. Often it is not possible to place pinholes of adequate
size and length in teeth that are thin labiolingually.
3. Pinledges are contraindicated on non-vital teeth and
when the alignment of the abutment will conflict with
the proposed path of withdrawal of the fixed partial
denture.
45. A, Guiding grooves are placed for lingual reduction.
B, The lingual reduction is completed, and an incisal bevel
is placed.
C, Incisal and cervical ledges are prepared.
D, Indentations have been made.
E, Pinholes are prepared to a depth of 2 mm. The junction
between the ledge and the pinholes has been countersunk.
46. Ledges & Indentations
• Two ledges are prepared across the reduced
lingual surface. These provide room for
additional bulk of metal to ensure rigidity.
• Without them, the restoration would not be very
strong because it would consist of only a thin
sheet of metal.
• Recommended minimum ledge width is 0.7 mm.
47. • The ledges are prepared parallel to the incisal
edge of the tooth, as viewed from the lingual
aspect, and parallel to one another, as viewed
from the incisal aspect
48. MAXILARY CENTRAL INCISOR PINLEDGE
A. Conventional pinledge
B. Pinledge with
proximal slice
C. Pinledge with
proximal groove
50. Indications
• An inlay can be used instead of amalgam for
patients with a low caries rate who require a
small interproximal restoration in a tooth with
ample supporting dentin.
• It is among the least complicated cast
restorations to make and can be very durable
when it is done carefully
51. Contraindications
• Because these restorations rely on intracoronal
(wedging) retention, inlays and onlays are
contraindicated unless there is sufficient bulk to
provide resistance and retention form.
• MOD inlays may increase the risk of cusp
fracture and are generally not recommended.
52. Advantage
• Cast inlays and onlays can be extremely long-
lived restorations because of the excellent
mechanical properties of the gold alloy
• Unlike an inlay or amalgam, an onlay can
support cusps, reducing the risk of tooth
fracture.
53. Disadvantage
• In the restoration of a small carious lesion, an
inlay is not very conservative of tooth structure
• High occlusal force may lead to cusp fracture as
a result of wedging from the inlay.
58. To summarise…
• Preparations for restorations should be based on
fundamental principles i.e a preparation must satisfy all
the three principles i.e biologic, mechanical & esthetic
principles which inturn are responsible for the success of
the prosthodontic treatment
• Also, it should be carefully decided which restoration to
choose based on each case.
Editor's Notes
Note the spacing of the ledges in relation to each other and to the pulp. All pinholes will be in sound dentin.