The Dentist Who Traded
Her Practice for the Rails

Dr. Mbambi Mzizi is a dentist. She's been one since 2012. But she doesn't work from a practice with a receptionist and a waiting room full of outdated magazines. She works on the Transnet Phelophepa Healthcare Train — nineteen coaches of fully equipped medical facilities moving from province to province, stopping every week or two in a community that would otherwise travel hours or pay hundreds to access the kind of care she delivers for R10. She joined Carlett on Medical Monday to talk about teeth, health, fear, and the God she says is at the center of all of it.

Their conversation started before the microphone was ever switched on. Dr. Mbambi had come in for a photography session at Photos@Carlett Studio, her children with her, gospel music playing in the background, and somewhere between the lighting adjustments and her admission that she never quite knows what to do with herself in front of a camera, she found herself completely at home. She told Carlett later that she'd been dancing without even realizing it. That's what happens, she said, when things are orchestrated by the Lord.

The Miracle Train

The Phelophepa Healthcare Train has been running since 1994. It started as a three-coach eye clinic and has grown into something significantly more ambitious — nineteen coaches, twenty full-time resident staff, dental, optometry, general medicine, psychology, and a pharmacy, all on wheels. Phelophepa itself is a word drawn from Sotho and Tswana, and it translates roughly to "good, clean health," which is precisely what the train delivers. A second train, Phelophepa II, launched in March 2012 to keep up with demand. Together they cover all nine provinces.

Dr. Mbambi's role on board is dental. From January through to the end of October, she and her colleagues leave their families behind and move with the train. Every week or two they are somewhere new — a rural station platform, a township, a community that has been waiting for the schedule to come around again. The services they offer don't look like much on paper until you understand what access to healthcare actually costs in the places where this train stops.

Dr. Mbambi is clear that the reward for this kind of itinerant life isn't the pay. It's the moment someone walks out of her chair having received care they never expected to be able to afford. It's meeting people of every ethnicity, every background, every story, and knowing you left them better than you found them. Carlett said it plainly on air: if she could have gone into any medical field, she'd have hopped on that train too.

Your Mouth Is Talking. Are You Listening?

The part of the conversation that stopped the studio was this: your dentist can sometimes know you're diabetic before you do. Dr. Mbambi walked through the connections between oral health and the rest of the body methodically and gently, the way someone does when they've explained it many times and never stopped being amazed by it. Every system in the body communicates with every other system, she said, and the mouth is one of the clearest windows into what's happening everywhere else.

Uncontrolled diabetes, for instance, shows up in the gums — red, swollen, bleeding spontaneously without any obvious cause. High blood pressure has oral signatures too. And small moles or pimples inside the oral cavity can sometimes indicate intestinal or colon cancers that haven't been detected elsewhere yet. Your dentist, she reminded listeners, is not just looking at your teeth.

What Actually Happens When You Skip Brushing

Carlett admitted what a lot of people know to be true about themselves — she has encountered people who simply do not brush their teeth every day. Dr. Mbambi didn't lecture. She explained. When you skip brushing, soft plaque builds on the teeth. Left long enough, that plaque hardens into calculus, the kind only a professional cleaning can remove. Calculus triggers infection in the gums, what people call gingivitis, the swelling and bleeding. Leave that untreated and it progresses into periodontitis, where the infection reaches the bone holding the teeth in place. At that point, teeth don't just hurt. They loosen. They fall out.

The minimum, she said, is once a day. Twice is better. But once is the floor, not a recommendation — the actual minimum required to keep the breeding ground for bad bacteria from getting out of control.

When to Go. And Why People Don't.

On cavities, Dr. Mbambi was direct: by the time most people decide to go to the dentist, the cavity has already become a much bigger and more expensive problem. A small cavity caught early is a quick, affordable fix. The same cavity left for months becomes a decision between a costly restoration or simply pulling the tooth. Her advice was unambiguous — the moment you feel something that doesn't feel right, go. Don't wait for the pain to become excruciating. Don't wait until the painkiller stops working. Go.

She's heard every reason people avoid the dentist, the sharp instruments, the sounds, the feeling of vulnerability that comes from having a stranger work inside something as personal as your mouth, the bad experience at age nine that never quite left. She doesn't dismiss any of it. But she asks every listener to take just the first step, one consultation, to find out it's not actually what they've been imagining for years.

Faith on the Rails

The conversation didn't stay only in the clinical. Carlett always makes room for the part underneath the profession, and Dr. Mbambi didn't need to be asked twice. Her faith, she said, is not something she brings to work. It is the core of her existence. She starts every day in prayer, ends every day in prayer, and treats the space in between as something God is involved in, not just her.

Working with people in pain, in fear, in frustration, sometimes in anger, requires being properly grounded, she said. When a patient is difficult, when the day has been hard, she goes back to the same place she started it. She mentioned that she plays gospel music when she needs to refocus, which made Carlett smile, because that is precisely the reason JustGospel exists.

Her encouragement to listeners was the kind that doesn't come from positivity training. It comes from someone who has lived it on a train far from home for ten months of every year and still wakes up choosing it. Stay in the faith, she said. Be steadfast. Invite God into everything. He is the author and the finisher of everything we go through, and nothing we carry is new to Him or too heavy for Him. He can carry us through all of it.

And then she did the station ID in her own flavor, with a warmth and a cadence that made Carlett tell her there was a presenter's chair with her name on it at JustGospel whenever the train retired. Dr. Mbambi said she might just hold her to that.