1. Division of Normal Anatomy, Department of Human Morphology and Embryology; Wroclaw Medical University; Wroclaw Poland
2. Department of Oral Anatomy; Wroclaw Medical University; Wroclaw Poland
3. Division of Histology and Embryology, Department of Human Morphology and Embryology; Wroclaw Medical University; Wroclaw Poland
4. Department of Conservative Dentistry and Pedodontics; Wroclaw Medical University; Wroclaw Poland