1. OBJECTIVE: To observe the effects of autologous platelet-rich plasma on premaxillary distraction osteogenesis in rabbits.

2. Teeth minute, rather conical in shape, set in broad band on premaxillary and in narrow band on dentary. Scales cycloid.

3. A dermal bone of the upper jaw which lies posterior to the premaxillary .

4. It should be classified within Tyrannosauroidea by its tall premaxillary body, median vertical ridge on the external surface of ilium.

5. On the higher fishes the maxillary is excluded from the gape , and the premaxillary bears the teeth.

6. The medial crura are supported by their elastic fibrous attachments to the caudal septum and the soft tissue interposed between their feet and the premaxillary area.