D. G. Op Heij

Age as compromising factor for implant insertion.

Marc Quirynen, Daniel van Steenberghe, M. Quirynen, 2003, Periodontology 2000.

Periodontal health of orthodontically extruded impacted teeth. A split-mouth, long-term clinical evaluation.

M. Quirynen, D. Steenberghe, D. van Steenberghe, 2000, Journal of periodontology.

The effect of the amount of protrusion built into the bionator on condylar growth and displacement: a clinical study.

H. Callaert, H. Opdebeeck, D. G. Op Heij, 1989, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.