There are several problems here ,
it is not a good idea to travel long distances for dental or medical treatment, because however well it is done there can always be problems , the more complex the treatment the more likely there are to be problems
the type of dentistry provided for dental tourists will be very different to the type of dentistry provided in normal day to day practice. In my practicing life I have seen the same patients for decades and in not one person have I cumulativey placed 28 crowns , let alone placed 28 in one person in one treatment , especially in their 20s or 30s.
no dental treatment lasts forever, it all needs replacing and renewing. When someone has had such extensive treatment , each renewal needs more destruction of tooth , eventually resulting in loss of tooth.
if you need a lot of treatment , in order for it to last any length of time , your oral health , care, habits and diet need adjusting otherwise the treatment will fail quicker than your teeth. This requires a relationship with a practice that goes beyond the one off treatment , and preferably means your dental health is addressed and improved before treatment starts and monitored in the years after
it is common practice for clinics in certain countries (Turkey being the main one) to ask patients to sign NDAs (non disclosure agreements) . So it is very difficult to post a negative review . If you look at many of the social media groups you will see numerous postings about this and negative reviews being removed from review sites.
I have seen some great dentistry from abroad , done to people who lived in the country , had a relationship with the dentist and had their oral health looked after , not just a one off mega course of treatment.
Unfortunately I have seen some horrific problems from dental tourism , with people having spent all their money and not realising the NHS will not pick up the pieces and not being able to afford remedial treatment (months/years of treatment costing well into 5 figures ) or even the price of having all the implants and teeth removed privately from the few U.K. dentists willing to touch this type of bombshell treatment because of the litigious nature of U.K. dentistry . It is easy to Sue a U.K. dentist , not so a dentist abroad in a foreign jurisdiction.
People ask how can a U.K. dentist tell someone has had dental tourism , it’s easy because the treatment plans are so extensive and destructive , people are looking for an all in one visit so they have “no more problems” without realising they have now committed themselves to a lifetime of replacing and maintaining a really complex mouth , with the effect they will lose their teeth so much quicker .