How can I create a tooth chart using Flutter?

You can use CustomPaint to draw a path with given offsets.

class Home extends StatelessWidget {
  const Home({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: CustomPaint(
      painter: Tpainter(),
    ));
  }
}

class Tpainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    Paint p = Paint();
    p.color = Colors.grey;
    p.strokeWidth = 4;
    p.strokeJoin = StrokeJoin.round;

    canvas.drawRawPoints(PointMode.polygon, Float32List.fromList(t_32), p);
    canvas.drawRawPoints(PointMode.polygon, Float32List.fromList(t_31), p);
    ... 
// or loop through List of teeth paths

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
}

List<double> t_32 = const [
  66.7,
  69.7,
  59,
  70.3,
  51,
  73.7,
  43.7,
  84.3,
  42.3,
  92,
  38.7,
  106,
  41,
  115.3,
  44.3,
  120.3,
  47.3,
  124,
  51.7,
  124.3,
  57.7,
  124,
  62.3,
  122.7,
  66.7,
  122.7,
  71,
  124.3,
  76.3,
  122.7,
  80.7,
  119.3,
  84.7,
  112.3,
  85.3,
  105,
  87.3,
  91.7,
  85,
  80,
  80.7,
  75,
  73.7,
  71.3
];

List<double> t_31 = const [...];
...