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Light cure ppt

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Dental Light Cure
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DENTAL CURING LIGHT DEVELOPMENT & PRODUCTION Introduced to :::::: Dr / Ahmed Farag
Transcript
Page 1: Light cure ppt

DENTAL CURING LIGHTDEVELOPMENT &

PRODUCTION

Introduced to:::::: Dr / Ahmed Farag

Page 2: Light cure ppt

1_Objective In Quantitative and Qualitative Manner

1 _Decrease number of components.

2 _Make the device more comfortable for doctor and patient, beautiful and small for easy used.

3 _Use a suitable chargeable battery..

4_ Reduce the cost of the device.

Page 3: Light cure ppt

2_TIME TABLELightCur

eTASKS START FROM END

Analyzing the product in the market .

20/9/2012 29/9/2012

Reverse engineering. 1/10/2012 20/10/2012

Ideas for developments and the final addition and shape for project.

20/10/2012 25/12/2012

Page 4: Light cure ppt

DENTAL CURING LIGHT

Usage of device:

Dryness of the white composite for teeth by using laser blue led.

What is the Composite?It is A mixture of plastic and fine glass particles.

Used for: Small and large fillings, especially in front teeth or the visible parts of teeth; also for inlays

Lasts: At least five years

Page 5: Light cure ppt

PRODUCT IN THE MARKET-:

After asking Maintenance Engineer and searching in many sites about device and its real components we know that:

A dental curing light is a piece of dental equipment that is used for polymerization of light cure

There are two main dental curing lights are the halogen and Blue LED.

Page 6: Light cure ppt

1.Old Light Cure

Operates with halogen lump.

Disadvantage: consume high power.

Page 7: Light cure ppt

PRINCIPLE OF TUNGSTEN HALOGEN

In order for the light to be produced, an electric current flows through a thin tungsten filament, which functions as a resistor.

This resistor is then “heated to temperatures of about 3,000 Kelvin, it becomes incandescent and emits infrared and electromagnetic radiation in the form of visible light”.

It provides a blue light of about 400 and 500 nm, with an intensity of 400- 600 mW cm^-2.[

Page 8: Light cure ppt

2.Using Blue Led

is most widely used .

2.1wireless:

Disadvantages: the chargeable battery is weak.

2.2hand with adaptorWireless Light Cure

better than the wireless

Page 9: Light cure ppt

PRINCIPLE OF USING BLUE LED

it uses light-emitting diodes that produce blue light that cures the dental material.

This light uses a gallium nitride as a semiconductor that is the basis for the blue emission.

“In LED’s, a voltage is applied across the junctions of two doped semi- conductors (n-doped and p-doped), resulting in the generation and emission of light in a specific wavelength range.

By controlling the chemical composition of the semiconductor combination, one can control the wavelength range.

Page 10: Light cure ppt

PRINCIPLE OF BLUE LED: The dental LED curing lights use LED’s

that produce a narrow spectrum of blue light in the 400- to 500-nm range (with a peak wavelength of about 460nm), which is the useful energy range for activating the CPQ molecule most commonly used to initiate the photopolymerization of dental monomers.

These curing lights are much different than the Halogen curing lights.

They are more lightweight, portable and effective.

Page 11: Light cure ppt

PRINCIPLE OF BLUE LED:

The heat generated from LED curing lights is much less which means it does not require a fan to cool it. Now that the fan is not needed, a more lightweight and smaller light could be designed. The portability of it comes from the low consumption of power.

The LED can now use rechargeable batteries, making it much more comfortable and easier to use

Page 12: Light cure ppt

SYSTEMS OF THE DEVICE-:

1. Continuous lightning for 15 sec.

2. Pulsed lighting every sec for 15 sec.

3. Graduate increasing in light intensity for 15 sec. These multiple systems are found, because of the theory, which says that when the composite material is exposed to light directly, it expands and cracks .

Page 13: Light cure ppt

prices Type of the device

500-1000L.E. Chinese device

1300 L.E Korean device

reach 4000 L.E. German device

300 L.E. China wholesale device

800 L.E. The latest device with lens to measure the wavelength

•Prices of the device in the market-:

Page 14: Light cure ppt

Famous damages in-:

1) Led.

2) Board.

3) Battery in wireless .

Page 15: Light cure ppt

Our Work:-the added value from point x to y

Development went in two directions: A – low cost(remember the price of it ' ' pounds) and redesign the shape of the cover.B - for electronic circuit:1 - safer2 - Replace the 3 resistors, 3 LED with 2 one LED (tri-color)

Page 16: Light cure ppt

Technical Specifications Rating Voltage: 220 volt or battery : 9 volt .

50-60 Hz , 1 A (for adaptor) . OutPut Of 5.0 VDC . Built in Battery is an Li-on type with 3.6 V-DC and

a capacity of 700 Mah It has the optical wavelength of 430 – 470

nm ,with flux intensity of 1,000 W/cm2 . With push of the button , it also includes 3

modes setting continous,pulsed,,gradually)

Page 17: Light cure ppt

Advantages

Light in weight Easy to handle

Convenient to control

Device Can Be Operated Either by battery or AC 220volt.

Page 18: Light cure ppt

Instrument Function Harden of the white composite for teeth by using light blue

led . visible spectrum output (lights)that lies within a specific

wavelength range . The idea is that the setting catalyst contained by this

particular color (wavelength) of light. Actually dentist use curing lights to activate the set of a wide

range of different types of dental materials. With most dental products including most dental composites

the light wavelength needed to activate the curing process lies somewhere within the range of 420 to 450 nm .

This means that the light emitted from the typical dental curing light will have a violet to blue coloration

Page 19: Light cure ppt

1. BLOCK DIAGRAM

Power ct.It will be Battery or Adaptor.

• Power 5v

• Micro Controller Circuit

• Blue Led

Page 20: Light cure ppt

COMPONENTS:

1. Power Switch.2. Power Indicator Led(Tri led).3. Restart Switch.4. Mode1 Button.5. Adaptor.6. LCD.7. UV Light LED Arm.8. UV Light LED.9. OK Button.10. Analogue out (RS232).11. SDPD switch.

Page 21: Light cure ppt

COMPONENTS AND IT'S SPECIFICATIONS :

1. BLUE LED :

has the optical wavelength of 430 – 470 nm ,with flux intensity of 1,000 W/cm2

Cost: 150 L.E

Page 22: Light cure ppt

2.PIC 16F628AProgram Memory 2048x14

RAM (Bytes) 224

EEPROM Data (Bytes) 128

Max Speed (MHz) 20

I/O 16

Package 18-pin DIP

Comparators 2

PWM Channels 1

Brown Out Reset Yes

Serial I/O AUSA-RT

Cost:

30 L.E.

Page 23: Light cure ppt

Used as indication led for 3 modes of device.

cost : 100 piaster

Tri-Color LED (Red/Green)

Page 24: Light cure ppt

10KΩ:RESISTORS

• (1/4 W)

• Cost:

25 Piaster

Page 25: Light cure ppt

REGULATOR “7805”:

Output Current up to 1A Output Voltages of 5 Thermal Overload

Protection Short Circuit Protection Output Transistor Safe

Operating Area Protection.

Cost:

50 pcs.

Page 26: Light cure ppt

330 Ω:RESISTORS

(1/4W).

Cost:

0.05 L.E

Page 27: Light cure ppt

ADAPTOR :

DC 5V 1A Switching Power Supply adapter 100-240 AC.

Cost: $2.60

Page 28: Light cure ppt

LCD DISPLAY: We used Lcd “ 2*16 ”For displaying which mode is chosen .

Cost : 30 L.E.

Page 29: Light cure ppt

CRYSTAL OSCILLATOR (4MHZ): A crystal oscillator is an

electromechanical component for an electronic osillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency.

This frequency is commonly used to keep track of time (as in quartz wristwatches ), to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters and receivers.

Cost: 3.00 L.E

Page 30: Light cure ppt

CAPACITORS :

2 capacitors of 22 micro-Farads (µF) .

Cost : 1 L.E.

Page 31: Light cure ppt

PUSH-TO-MAKE SWITCHES:

3 switches for 3 modes of device.

Switch for power(spdp)

1 for on/off for device.

1 for reseting the device.

Page 32: Light cure ppt

•CIRCUITS: MICRO CONTROLLER CIRCUIT: SIMULATION ON PROTEUS:

RA0/AN02

RA1/AN13

RA2/AN2/VREF-/CVREF4

RA4/T0CKI/C1OUT6

RA5/AN4/SS/C2OUT7

RE0/AN5/RD8

RE1/AN6/WR9

RE2/AN7/CS10

OSC1/CLKIN13

OSC2/CLKOUT14

RC1/T1OSI/CCP216

RC2/CCP117

RC3/SCK/SCL18

RD0/PSP019

RD1/PSP120

RB7/PGD40

RB6/PGC39

RB538

RB437

RB3/PGM36

RB235

RB134

RB0/INT33

RD7/PSP730

RD6/PSP629

RD5/PSP528

RD4/PSP427

RD3/PSP322

RD2/PSP221

RC7/RX/DT26

RC6/TX/CK25

RC5/SDO24

RC4/SDI/SDA23

RA3/AN3/VREF+5

RC0/T1OSO/T1CKI15

MCLR/Vpp/THV1

U1

PIC16F877A

D1LED-BLUE

D7

14D

613

D5

12D

411

D3

10D

29

D1

8D

07

E6

RW

5R

S4

VSS

1

VD

D2

VEE

3

LCD1LM016L

1234

4321

Page 33: Light cure ppt

BOARD:

Page 34: Light cure ppt

MICRO CONTROLLER CIRCUIT:

Page 35: Light cure ppt

PRINTED CIRCUIT BOARD

Page 36: Light cure ppt

PRINTED CIRCUIT BOARD

Page 37: Light cure ppt

PRINTED CIRCUIT BOARD

Page 38: Light cure ppt

BCB FOR “SPDP SWITCH”

Page 39: Light cure ppt

Presented by Aya Sobhy HussienEslam Taha Dina Wagih AhmedHisham abdel fatah

Light

cure

THANK YOU


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