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The object is formed by the solidification of a photo-reactive resin using a digital light projector as the UV light source.
- Digital Light Processing
- Material: Varieties of resin and wax
- Pros: High accuracy and resolution (HD projector), quicker print
- Cons: Low surface finish (Layer lines)
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Uses a laser beam to cure liquid resin into hardened plastic in a process called photopolymerization.
- Stereolithography (SLA)
- Formlabs printers
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A liquid photosensitive resin is cured by a laser or a projector to form the object directly in the resin tank of the 3D printer, which are the 2 types
- Polymerization Methods
- 1. Stereolithography (SLA)
- 2. Digital Light Processing (DLP)
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When A plastic filament is melted and deposited on the build platform of the 3D printer to form the object layer by layer, which are the 2 types?
- Deposition Methods
- 1. Fused Deposition Modeling (FDM)
- 2. Directed Energy Deposition (DED)
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What are the three types of 3d Printing technologies?
- 1. Deposition Methods
- 2. Polymerization Methods
- 3. Sintering Methods
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This Method builds parts by melting and extruding thermoplastic filament. Deposited layers are fused together as the melted plastic quickly solidifies to form a solid three-dimensional object.
Fused Deposition Modeling (FDM) - LOW RESOLUTION, NOT FOR COMPLEX DESIGNS
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Method where printing material is slowly pushed towards a powerful energy source (like a laser or an electron beam) to be directly melted and fused to form an object.
- Directed Energy Deposition (DED)
- Material: Large diversity of materials (metal, CERAMIC, plastic, wax, etc.)
- Pros: Quick and full dense fabrication
- Cons: Poor surface finish and accuracy
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Which out of SLA or DLP are better for printing large or smaller items?
- SLA prints smaller items better (Formlabs)
- DLP Faster to print large fully dense prints
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A method where A POWDERED material is sintered or melted by a laser, the grains of powder are bonded or melted together (sintered) to obtain a solid structure. Which are the 2 types?
- Sintering methods
- Selective Laser Sintering (SLS) thermoplastics and Nylon NO NEED FOR SUPPORT
- Selective Laser Melting (SLM) In metal particles of powder $ NEEDS SUPPORT
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Dental Prototype Resin (Standard Grey Resin), does it need post curing?
NO, does not need POST CURING Request, use for orthodontic models and clear aligners
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Dental Surgical Guide Resin (Dental SG), is made of which material?
Class I biocompatible resin
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Dental Night Guard Resin (Dental LT), is made of which resin?
Class II long-term biocompatible resin
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Dental Castable Wax Resin is made of
20% wax-filled photopolymer for reliable casting with zero ash content and clean burnout, highly accurate Castable Wax Resin
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Denture Base/Teeth Resin is made of
Class II long-term biocompatible Denture Resin
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The milling burs SET 1's main function bur is
Step Bur 12-S
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The milling burs Set 1's occlusion bur is
Cylinder pointed bur 12-S
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The milling burs Step 1 (both cylinder and step) are used primarily for
Crowns, Onlay and Inlay
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In the milling burs Set 2, the detail bur is
Step bur 12 (other burs from Set 1 are used too)
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Usage for the milling set 2
Onlay and Inlay / Crown
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Milling burs set 3
- Step bur 20 (long measurement bur)
- Pointed Cylinder bur 20 (long occlusion bur)
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Usage of the milling burs set 3
Implant temp crown
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Milling burs set 4
- Shaper 25 RZ (wild cutting bur)
- Finisher 10 (Brittle cutting bur)
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Use of the milling burs set 4
Cerec surgical guide / temp crown / Zirconia / FPD
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In preparation requirements for tight corners
Ensure the corners of the internal surface margin have greater than 1mm diameter.
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In milling crowns, the perparation CANNOT have
- Knife edge margin
- BE OVER MILLED- WILL NOT SEAT
- Less than 1mm thickness of preparation
- Must finish all margins with superfine diamond, remove "bur chatter"
- Rounded line angles
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There are four types of surgical guide :
- 1. Bone supported
- 2. Mucosa supported
- 3. Tooth supported
- 4. Hybrid supported
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The fabrication of the surgical guide templates is then based on
one of the following design concepts
- 1. Non-limiting design
- 2. Partially limiting design
- 3. Completely limiting design
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This design of surgical guide provides an indication to the surgeon as to where the proposed prosthesis is in relation to the selected implant site. This design indicates the ideal location of the implants without any emphasis on the angulation of the drill, thus allowing too much flexibility in the final positioning of the implant.
non-limiting
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In this design of surgical guide the number of drills used for the osteotomy is directed using the surgical guide, and the remainder of the osteotomy and implant placement is then finished freehand by the surgeon.
Partially limiting design
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This design of guide completely restricts all of the instruments used for the osteotomy in a buccolingual and mesiodistal plane. Moreover, the addition of drill stops limits the depth of the preparation, and thus, the positioning of the prosthetic table of the implant.
Completely limiting design
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Which types of guides are the completely limiting guides?
- SICAT (OPTIGUIDE and CLASSIC GUIDE)
- NOBEL GUIDE
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Which guides is the partially limiting guide
CEREC GUIDE (milling and printing) (for one or 2 implants)
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The SICAT guides are divided into 2
- Classic Guides: For partial and fully edentulous
- Can be mucosa (for edentulous) and Hybrid supported
- OPTI Guide: For Partial edentulous
- Can be Tooth and hybrid supported
-
CEREC milling guides are for
- For a single implant only
- Tooth supported guide
- Not for free end
- Not for full guide surgery
-
CEREC Printing Guide is for
- For two adjacent implants
- Tooth supported guide
- Not for free end
- Not for full guide surgery
-
SICAT OPTIGUIDE IS FOR
- SICAT OPTI GUIDE (DIGITAL GUIDE)
- For partial edentulous only; CANNOT USE OPTIGUIDE FOR A FULLY EDENTULOUS CASE
- Tooth/ hybrid supported (Optiscan merge required);
- Especially for free end implants and more than two continuous
- implants! CANNOT USE IF MANY ARTIFACTS PRESENT
- ****For full guide surgery.
-
SICAT CLASSIC GUIDE
- For partial AND full edentulous
- Mucosa/ hybrid supported
- (Opti scan merge NOT required);
- Especially for metal artifact abutment teeth;
- ****For full guide surgery.
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2 types of nobel guides
- Nobel radiographic guide (Partial/full edentulous)
- Nobel SmartFusion Guide (partial edentulous ONLY)
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Chairside milling machines are how many axis compared to Lab
- Chairside 4-axis
- Lab 5-axis
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What benefit does a 4th axis allow compared to only 3?
it allows the item to be turned over to be milled from the opposite side
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Benefits of 5 axis milling machine
- Milling machines with 5 or more axes can rotate the material block in additional axes
- Milling of more complex designs – undercuts in implant superstructure (great for long FPD or denture, multiple products)
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Does more axis mean more accuracy in milling
NO! *Accuracy and resolution is not relevant with the axis
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Which materials can be wet or dry milling?
- In general, the type of material being milled determines whether a mill should be dry or wet.
- • Wet milling: lithium disilicate, feldspathic porcelains, and chrome cobalt metals
- Dry milling: wax, some acrylic, and resin
- Both dry and wet: zirconia, titanium, and some acrylic
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The white colored milling grinding burs are for
Ceramic blocks
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The yellow milling bur is for
ZrO2
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The red milling bur is for
PMMA
-
The Blue milling bur is for
Resin, Composite , PEEK etc...
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The green milling bur is for
Metals
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