Dr. Seyed Amir Hosseini

Along Petaluma’s quiet 4th Street, orthodontic care keeps a low profile between the historic storefronts. Dr. Seyed Amir Hosseini practices here, offering the kind of specialized alignment work that reshapes smiles over months, not hours. Orthodontics isn’t the flashy side of dentistry—no same-day whitening or emergency extractions—but the slow, precise adjustments that eventually let braces or aligners come off for good. This stretch of downtown still feels more like a place for deliberate decisions than impulse stops, which suits the nature of the work.

The office sits at 26 4th St, a block where the sidewalk traffic thins out by late afternoon. There’s no sign of the chaotic energy you’d find in a pediatric dentist’s waiting area; instead, it’s a space for patients who’ve already committed to the long process of straightening teeth, correcting bites, or preparing for retainers. Some come for traditional metal braces, others for clearer alternatives like Invisalign, but the end goal is always the same: alignment that lasts. A single map click confirms it’s tucked between a tax advisor and a long-shuttered retail space, the kind of address you’d only know if you were looking for it.

With just one Google review so far, the practice holds a 5.0 rating—a quiet vote of confidence from someone who’s been through the process. Questions about treatment timelines or payment plans are best directed to the front desk by phone at (707) 787-5600. Orthodontic work doesn’t lend itself to drive-by decisions, but for those already weighing their options, the details are all there, waiting.