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LASIK - excimer laser

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1. Laser Tissue Interaction: Laser ablation
2. Laser treatment: Tooth decay, reshape gum tissue (crown lengthening)
3. Diagnose: Cavity detector (scan teeth for hidden decay)
4. Advantages:
- Minimal bleeding
-Less pain
- faster healing
5. Disadvantage: Cannot use laser when the teeth has metal fillings

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kalau kata anaiyze... perkataan tu.. maknanya korang kena keluarkan SEGALA MAK DATOK NENEK PUNYA PENGETAHUAN dan bandingkan/bagi pendapat. Jom kita cuba sini

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Glass (cermin mata)

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1. Drilling... remove decay
2. Detecting tooth decay

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1. Tattoo/scar removing
2.

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Tampal info pasal eximer laser here (tolak tepi hal LASIK sini)

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Tampal info pasal eximer laser here (tolak tepi hal LASIK sini)

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1. Diagram excimer laser
2. Penjanaan laser excimer
3. Proses2 dalam laser

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Consist with halogen and noble gases
Example: ArF, XeCl, KrF

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Excimer laser diagram

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1. because we cannot control you, jauh dari mata
2. maka kami tak halang, tapi soalan kami perlu prepare ikut thinking skills bukan just copy paste

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1. Explanation in scientific way is what we are looking for.
2. jawapan bukan sains seperti kos, masa, mudah susah, boleh, tapi kena tambah science explanation

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1. So, jangan buang masa dengan berbincang semasa exam. Lebih baik guna masa tu untuk buka buku/google/berfikir/menjawab

2. Contoh, ada orang akan dapat soalan, analisis rawat blocked artery, ada yg dapat acupuncture, ada yg dapat eye surgery..tapi level kesusahan/thiking skills, sama...

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Excimer laser mindmap

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Glass (cermin mata)
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Avatar of Ayen Usen
Ayen Usen 20d
sini, soalannya, apa kerja glass? boleh kah lama2 pakai cermin mata, boleh jadi lebih pulih or tak, dan kenapa?, apa kelebihan guna glass berbanding LASIK?..
Avatar of 
Anonymous 20d
Menjadi satu medium untuk membenarkan satu objek yang dilihat oleh mata terletak pada titik kornea yg lebih tepat, penggunaan cermin mata bukan satu rawatan tetapi sebagai alat bantu sahaja, jadi ianya tidak boleh memulihkan mata yg rabun
Avatar of 
Anonymous 20d
Kelebihan menggunakan Glass berbanding lasik - kos penjanaan yang lebih murah berbanding lasik.
Avatar of Ayen Usen
Ayen Usen 20d
ok, siapa ni.. betul jawapan cara glass berfungsi tu.. jawapan kos tu pun, betul.. tak salah.. tapi, tak fizik. hehehe.. cuba cari kelebihan guna glass, yg fizik explanationnya
Avatar of Halil Shahmi
Halil Shahmi 20d
Saya
Avatar of Halil Shahmi
Halil Shahmi 20d
Kelebihan menggunakan glass berbanding lasik. -penggunaan spec tidak ada sebarang rawatan sentuhan secara terus seperti "flap" pada mata, manakala LASIK memerlukan "flap of creation"
Avatar of Ayen Usen
Ayen Usen 20d
ok, halil. boleh jawapan tu. elok tambah "temporari atau kekal", k?
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Denstistry conventional
Denstistry conventional
1. Drilling... remove decay
2. Detecting tooth decay 

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Avatar of Siti Aishah Zainal Abidin
Siti Aishah Zainal Abidin 20d
Remove decay,
Avatar of Ayen Usen
Ayen Usen 20d
so, how drilling remove tooth decay? cuba lebih fizik/sains explanation tu
Avatar of HAFIZUDDIN SAMSU BAHRI
HAFIZUDDIN SAMSU BAHRI 20d
First, the dentist will numb the decayed tooth or teeth to be treated using a local anesthetic that is injected into the area. The anesthetic also numbs gums and jaw around the teeth. Once the dentist confirms the numb, they use a dental drill to remove the decay. After the dentist removes the decay and readies the tooth, they place the filling. The specific method used to insert the filling depends on the type of filling that be getting.
Avatar of Ayen Usen
Ayen Usen 20d
Hafiz, betul... and your answer sini more to dentistry punya bidang. saya takkan tolak markah, tapi susah nk bagi markah..
Avatar of Ayen Usen
Ayen Usen 20d
nak cuba lagi? macam mana drilll boleh remove decay?
Avatar of Siti Aishah Zainal Abidin
Siti Aishah Zainal Abidin 20d
For conventional drilling, the drill will apply the vibration to the decay parts make it get out from the teeth.
Avatar of Ayen Usen
Ayen Usen 20d
ok Aishah, perkataan vibration tu keyword nya.. atau mechanical energy.. ok?
Avatar of Siti Aishah Zainal Abidin
Siti Aishah Zainal Abidin 20d
Ok
Avatar of Ayen Usen
Ayen Usen 20d
now proceed ke how conventional method detect decay?
Avatar of Siti Aishah Zainal Abidin
Siti Aishah Zainal Abidin 20d
The dentist will use dental mirrors to see teeth from all angles. Reflecting light onto the mouth mirror can be done to search for dark shadows that could indicate dentin lesions.
Avatar of Siti Aishah Zainal Abidin
Siti Aishah Zainal Abidin 20d
Keyword: dental mirror. Ada reflection of light
Avatar of Ayen Usen
Ayen Usen 20d
ok aishah, nice
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Tempat Berbual, Here
Haaa. berbual di sini ya..
Haaa. berbual di sini ya.. 
kalau kata anaiyze... perkataan tu.. maknanya korang kena keluarkan SEGALA MAK DATOK NENEK PUNYA PENGETAHUAN dan bandingkan/bagi pendapat. Jom kita cuba sini
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Avatar of Siti Aishah Zainal Abidin
Siti Aishah Zainal Abidin 20d
Okay. Baik DR
Avatar of Ayen Usen
Ayen Usen 20d
okay, cuba yg vision correction tu, di ruang komen sana, explain dulu.
Avatar of Ummi Shobirah Ali
Ummi Shobirah Ali 20d
Dr kita tak focus hanya eye surgery je kan? Untuk padlet ni?
Avatar of Ayen Usen
Ayen Usen 20d
Ya, kita akan buat banyak2 application. sy ajak cuba dulu kt vision correction, tgk rentak dlu
Avatar of Ummi Shobirah Ali
Ummi Shobirah Ali 20d
Ok dr
Avatar of Ayen Usen
Ayen Usen 20d
Kawan2 boleh tambah pada post kawan2 lain, di ruangan komen
Avatar of Ayen Usen
Ayen Usen 20d
okay, cuba jawapan2 tu lebih menerangkan fikziknya..
Avatar of Ayen Usen
Ayen Usen 20d
nak bagitau, generally, soalan final exam akan lebih susah daripada tahun2 sebelum.. sebab, online, dan u ollz boleh buka buku/google..
Avatar of Ayen Usen
Ayen Usen 20d
maka, soala2n direct, state, explain, tu, tak mencabar.. kalau compare, jawapan kita mesti macam budak fizik, bukan netizen biasa yang google dan compare dua jenis pilihan saja..
Avatar of Ayen Usen
Ayen Usen 20d
korang boleh klik perkataan UPDATE klu keluar pop up tau..
Avatar of Ayen Usen
Ayen Usen 20d
Denstistry utk treatement belum berjawab tu.. jemput jawab
Avatar of Ayen Usen
Ayen Usen 20d
okay, dah pukul 11, u ollz ada kelas lain?
Avatar of Ayen Usen
Ayen Usen 20d
kita tangguh dulu. malam nanti saya tengok balik dan komen jika u ollz ada tambah apa2, ok?
Avatar of Siti Aishah Zainal Abidin
Siti Aishah Zainal Abidin 20d
okay Dr
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Topik spesial - Excimer laser
Tampal info pasal eximer laser here (tolak tepi hal LASIK sini)
Tampal info pasal eximer laser here (tolak tepi hal LASIK sini)
1. Diagram excimer laser
2. Penjanaan laser excimer
3. Proses2 dalam laser
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Type of excimer laser
Type of excimer laser 
Consist with halogen and noble gases
Example: ArF, XeCl, KrF
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Avatar of Ayen Usen
Ayen Usen 20d
ok.good.. so bahan2 tu, apa, pum source? gain medium?
Avatar of Ummi Shobirah Ali
Ummi Shobirah Ali 20d
Pum source of excimer laser electrical discharge or known as excimers
Avatar of Ummi Shobirah Ali
Ummi Shobirah Ali 20d
Gain medium : mixture of noble gas and halogen
Avatar of Ayen Usen
Ayen Usen 20d
biasa laser dinamakan ikut gain medium dia kan? mcm He-Ne Laser, Ruby Laser.. adakah Ummi nak mksudkan, Excimer laser, Excimer tu BUKAN gain medium, maka terbatal la kebiasaan ini?
Avatar of Ummi Shobirah Ali
Ummi Shobirah Ali 20d
Saya faham, excimer is formed after the gain medium being pumped with electrical discharged pumping source. Excimer is excited dimer and dimer is a molecule consist of 2 atom. So, excimer laser name still based on the gain medium of the laser
Avatar of 
Anonymous 20d
Excimer tu dia comes from two words.. Excited dimer.. Mksdnye molecule to composed drpd two atoms dan hanya exits di excited
Avatar of Ayen Usen
Ayen Usen 20d
ok. nice.. korang faham kan, apa korang tulis ni?
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Excimer laser diagra
Excimer laser diagram
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Avatar of Ayen Usen
Ayen Usen 20d
okay ni nice. explain
Avatar of HAFIZUDDIN SAMSU BAHRI
HAFIZUDDIN SAMSU BAHRI 20d
The most important excimer molecules are rare gas halides such as ArF, KrF, XeF and XeCl, which do not exist in nature but can be produced by passing an electrical discharge through a suitable gas mixture. In excimer lasers the rare gas corresponds to about 1-9% of the mixture, with a halogen donor concentration of about 0.1 to 0.2%.The rest of the gas is usually helium or neon and is used to promote energy transfer.Due to the corrosive nature of the gases used, the structure of excimer lasers is currently engineered from stainless steel, polyvinyl and teflon components. The discharge is usually transverse, see in Fig, and the electrodes are long, flat and made from nickel or brass. In a similar manner to the pulsed TEA (transversely excited atmospheric) CO 2 laser, a pre-ionisation pulse is required to establish uniform excitation. The laser cavity can be sealed and repeatedly refilled as the laser gas degrades during use. Fan type pumps are used to circulate the lasing gases. As with most gas lasers, the rear cavity mirror is highly reflective.However, the high gain available eliminates the need for a reflective coating on the output mirror. The most common optical material used in these lasers is magnesium fluoride, which is more transparent than quartz or fused silicon (which is also used) at short wavelength. Sapphire is also used as a window material in ArF lasers.
Avatar of Ayen Usen
Ayen Usen 20d
ok Hafiz. ni amat fizik ni, kena bagi markah bonus hahaha.. cuma, macam mana nk buktikan, ianya guna thinking skill kita? dan nampak, kita faham.
Avatar of Ayen Usen
Ayen Usen 20d
Cuba hafiz lukis mindmap, dan up gambar tu kat sini.
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Excimer laser mindma
Excimer laser mindmap
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IMPORTANT NOTES
Final exam, is an open book/google-able
Final exam, is an open book/google-able
1. because we cannot control you, jauh dari mata 
2. maka kami tak halang, tapi soalan kami perlu prepare ikut thinking skills bukan just copy paste
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Jawapan Fizik atau Bukan
Jawapan Fizik atau Bukan
1. Explanation in scientific way is what we are looking for. 
2. jawapan bukan sains seperti kos, masa, mudah susah, boleh, tapi kena tambah science explanation
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Ada soalan yang lain BERBEZA
Ada soalan yang lain BERBEZA
1. So, jangan buang masa dengan berbincang semasa exam. Lebih baik guna masa tu untuk buka buku/google/berfikir/menjawab

2. Contoh, ada orang akan dapat soalan, analisis rawat blocked artery, ada yg dapat acupuncture, ada yg dapat eye surgery..tapi level kesusahan/thiking skills, sama... 

 
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