Angelica Vivas faces two felony charges with two counts of practicing dentistry and dental surgery without a license.
Charging documents allege Vivas put at least two patients under anesthesia several times and provided "botched" root canals out of Katy.
During Wednesday's probable cause court, the hearing officer reviewed the allegations and spoke about the victim being in "excruciating pain."
ABC13 spoke to a woman who she treated but didn't want to be identified.
"I can't do anything on my left side. I really can't eat anything with it because I still need surgery," the woman said.
She says the damage was so severe, it is costing her thousands of dollars to fix.
"Financially, it really hurts. I'm using my savings, looking to borrow money, because I don't have it. I'm looking for a doctor willing to work with me."
The hearing officer noted that it was "horrifying" that Vivas was allegedly placing people under anesthesia, considering that a person can die if given the wrong dosage.
Vivas was given a $50,000 bond and is scheduled for her next court hearing on Thursday at 8:30 a.m.
The Houston Police Department provided Eyewitness News with Vivas' mugshot and urges any other potential victims to come forward.
Court records show that Vivas has been in the Houston area for 12 years and lives with her husband and their 14-year-old son, who is diagnosed with Williams syndrome.
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