Fixed Exam 2 - Digital Dentistry Concepts Flashcards
What is the first digital instrument?
Pictures
What is cant?
Tilting of the jaw
T/F: Don’t start any tx until you can visualize the end result and determine the steps to achieve it
True
Where is digital dentistry used?
Fixed and removable prosth
Implants
OMFS
Endo
TMD and OFP
Ortho
Orthognathic surgery
Surface mapping that allows for the surface geometry or shape of an object to be stored as a set of 3D points of vertices. The surface of the object is stored as a series of polygons (or faces) that are constructed by indexing these vertices. The number of vertices the face may index can vary, though triangular faces with 3 vertices are common
Data acquisition (3D surface scanning)
Process of acquiring the 3D image of a dental model for translation into a digital file format, such as STL. The digital file can be stored for future references or used in a CAD software program for the design and fabrication of a dental prosthesis
Model scanning
What makes up a picture?
Pixels
What are the different file formats?
Vertices -> edges -> faces -> polygons -> surfaces
What makes up a STL file?
Faces
(vertices, edges, faces)
Which file has no color?
STL (standard tessellation language)
Which file has color?
DCM (digital color model)
OBJ (object file format)
PLY (polygonal file format)
File format native to the stereolithography CAD software created by 3D systems
STL
This file format is supported by many other software packages; it is widely used for rapid prototyping and computer-aided manufacturing
STL
This file describes only the surface geometry of a 3D object w/o any representation of color, texture, or other common CAD model attributes
STL
3D file format that stores graphical objects described as a collection of polygons
PLY
This file specifies properties associated with each vertex such as (s, y, x) coordinates, normals, and color
PLY
Simple data file format that represents 3D geometry alone: the position of each vertex, position of each texture coordinate vertex, normal, and the faces that make each polygon defined as a list of vertices and texture vertices
OBJ
Steps
Data acquisition
Design (CAD)
Manufacturing (CAM)
The use of computer programs to create 2D or 3D graphical representations of physical objects. It may be specialized for specific applications
Computer-aided design (CAD)
The use of computer software to control machine tools and related machinery in the manufacturing of work pieces
Computer-aided manufacturing (CAM)
Primary purpose = create a faster production process and components and tooling with more precise dimensions and material consistency
Computer-aided manufacturing (CAM)
Uses only the required amount of raw materials, thus limiting waste, while simultaneously reducing energy consumption
Computer-aided manufacturing (CAM)
What are the 2 types of computer-aided manufacturing (CAM)?
Milling
3D printing
Subtractive manufacturing
Milling
Additive manufacturing
3D printing
How many axises can be used for milling?
3
4
5
7
What is 3-axis milling?
X, Y, Z
What is 4-axis milling?
X, Y, Z, A
What is 5-axis milling?
X, Y, Z, B, C
What are the types of 3D printing?
FDM (fused deposition melting)
DLP
SLA (stereolithography)
SLS/SLM (selective laser sintering - for metals)
What is the most basic 3D printing and is NOT used in dentistry?
FDM
Which method of 3D printing has a laser that cures the resin layer by layer, thus being super accurate but very slow?
SLA
Which method of 3D printing projects a whole image that is cured all at once, thus being much faster than SLA?
DLP
Which method of 3D printing is used mainly for metals?
SLS
What is meant by open system?
Can jump btwn any company
What is meant by closed system?
Same company must be used from start to finish
