Hi ! I am a dentistry student in the Philippines (University of Baguio). Like you, I am also interested in taking dental board exams of some overseas countries. Here is some information that I was able to gather regarding your questions.
Taking dental board examinations of other countries is not that easy. It needs lots of requirements, plenty of time and of course money!
CANADA:
In Canada, both Canadian dentists and foreign dentists are obliged to undergo national dental examination board (NDEB). If you have acquired your degree from Canada, USA or Australia, you can directly sit in NDEB. If not, you must undergo three different assessments: 1- NDEB Online Self Assessment;
2- NDEB Equivalency Process;
3- Assessment of Fundamental Knowledge.
If you successfully pass all these three assessment examinations, you will have two choices: to take the completion degree; or to take two more exams: assessment of clinical skills and assessment of clinical judgment.
If you want to take the completion degree, they will be the one to examine how many more years you have to study (usually it is around two years; however it still depends on your performance in your previous examinations and assessments). After you successfully complete the completion degree, they will allow you to take NDEB which is comprised of both written and clinical examinations. As you know, the cost of completion degree in Canada is so high.
If you choose the second way and undergo assessment of clinical skills and assessment of clinical judgment and you can successfully pass them, you will be eligible to take NDEB. But if not, you can still repeat the examinations two more times. If you fail three times, you will have to take the completion degree and then NDEB.
Below is cost of the examinations:
NDEB Equivalency Process: 500$
Assessment of Fundamental Knowledge: 600$
Assessment of clinical judgment: 1500$
Assessment of clinical skills: 4000$
Completion degree: * tuition fees for dentistry course at Canadian universities, you need to contact them and ask how much.
NDEB: 2000 $
As you can see all the five examinations cost 8600$.
Unlimited attempts are allowed for NDEB.
USA:
In the United States, you need to complete a 2-year supplemental dental education program at an accredited dental school before you can take their board exam.
AUSTRALIA:
In Australia, it is much easier. You have two choices to get your license. You can either take the completion degree, or take the board exam. If you successfully finish the completion degree, they will give you license without having to pass the board exam. But if you think the completion degree is expensive, you can take the board exam. However, before taking the exam you must complete some requirements; you should be a registered dentist in your country of training or practice, and must have OET certificate (Occupational English Test). Have it in mind that your OET certificate is valid only for two years (just like TOEFL or IELTS). They do not accept IELTS or TOEFL. They accept only OET. As you have mentioned in your question, foreigners are not allowed to take Philippine dental board exam. So you need to take Koreas board exam first, and then apply for Australia.
The fee for Australian dental board examination is around 10,000 $.
NEW ZEALAND:
In New Zealand, you will only have one way and that is passing their board exam. You need to be a registered dentist in your country before taking New Zealand board exam. The costs and fees for both written and clinical examinations are around 6000$. There might also be other fees that I am not sure about. Before taking the board exam, you must have either IELTS 7.5 or OET certificate. So, in language requirements, New Zealand is more flexible than Australia. In New Zealand you are allowed to take the board exam only three times. If you fail 3 times, you will no longer be allowed to take it. However, you are allowed to take Australia board exam as many times as you want. If you have Australian license, you are also allowed to practice in New Zealand.
If you have a high level of qualifications and several years of experience in your career, they might exempt you from the board exam and automatically register you as a dentist in New Zealand.
If you do not want to go back to Korea after your graduation, so you might have three options: Board exam of Canada or USA, or completion degree of Australia. If your financial ability is limited, so board exam of Canada is the best choice for you, because board exam of USA requires a completion degree at first. However, Canadas board exam is not that easy and requires a lot of study, effort and several examinations.
If you go back to Korea and be a registered dentist, you will have more options. You will be able to take board exams of Australia or New Zealand which are easier than Canada or USA.
I hope this could help you.
I also have some questions about UP from you. If you mind to answer please contact me. Hope to hear from you. I would be happy.
Gud luck!
) Please I need some help! THANKS SO MUCH!!!!!!!!!!! 
