Police are investigating fraud allegations against Estonian dentist Dr. Sven Kalle after dozens of patients reported paying thousands of euros in advance for dental services that were never completed.
A formal complaint signed by 57 people was filed last week, but investigators say the total number of victims could reach into the hundreds. Many patients allege that Dr. Kalle accepted full payment for orthodontic aligner treatments and then abruptly disappeared, leaving treatments unfinished and funds unrecovered.
Dr. Kalle, 48, had built a strong public image through a polished marketing campaign, including promotional videos showcasing modern bite-correction techniques. The campaign reportedly tripled his client base. His website described him as a veteran dentist with more than 1,000 successful orthodontic cases and emphasized prices lower than competitors.
“I paid €4,000 and received nothing beyond a treatment plan,” said patient Katriine Laanjärv, 24. “After that, there was no service and no response.”
Several patients and business partners say Kalle also failed to pay outstanding debts. Svetlana Kolkanen, sales manager at aligner manufacturer Ordoline, confirmed the company is owed money for unpaid production and missed payments.
According to an investigative program by Estonian public broadcaster ERR, Dr. Kaller replied to text messages saying he was currently receiving treatment in a psychiatric hospital and claimed that his personal problems had spiraled out of control. He stated that he would address the matter once his health improved.
Patients say warning signs emerged last year. Appointments were frequently canceled, clinic locations changed repeatedly, and communication stopped. Some patients never received aligners despite having paid in full.
“He stopped responding, or appointments were canceled the night before,” said patient Sigrid Victoria Laurent, 32. “At some point, I realized something was very wrong.”
Many affected patients found each other through social media. A Reddit forum discussing Kalle’s clinic has more than 400 posts, and a WhatsApp support group now includes around 100 people sharing updates and advice.
The case has also exposed regulatory gaps in Estonia’s dental oversight system. The Health Board confirmed that Dr. Kalle was a general dentist and not authorized to provide orthodontic services.
“Aligner treatment is orthodontics,” said Külli Friedemann, head of health services at the Health Board. “Dr. Sven Kalle was not authorized to provide orthodontic services.”
Despite this, the Estonian Dentists’ Association argues that general dentists may offer aligner treatment under certain conditions. That dispute has left patients in limbo, as insurers have declined coverage and no formal medical malpractice assessments have begun.
Patient insurance introduced in 2022 did not apply in this case because Kalle was not a certified orthodontist. As a result, patients seeking compensation have been directed to the same legal channels used for consumer disputes.
“From a legal standpoint, this is no different from paying for furniture and the company disappearing,” Friedemann said. “Healthcare services are unfortunately no exception.”
Ordoline says it receives up to 20 calls a day from patients who assumed aligners had been ordered, only to learn that no treatment plans were approved and no production had started.
Police records show that since 2024, Kalle has been involved in several incidents, including three DUI arrests and detentions related to aggressive behavior and suspected drug intoxication. Investigators are now examining whether patient funds were used to cover earlier debts.
Meanwhile, patients face starting over. Many dentists are reluctant to take over incomplete aligner treatments, citing the need for new diagnostics and treatment plans.
“A new doctor has to reassess everything from the beginning,” Kolkanen said. “For the patient, it’s essentially a new treatment.”
The Health Board has suspended Dr. Kalle’s business licenses at several registered addresses, but because he does not hold a specific orthodontic license, broader restrictions remain unclear.
As the investigation continues, patients say the damage goes beyond money.
“I’m saving again just to restart treatment,” Laanjärv said. “The hardest part is losing trust.”
The case has reignited debate over who should be allowed to provide orthodontic dental services and how patients can be protected when private practitioners fail.