The Effects of Denervation and Isciiemia Upon the Teeth of the Monkey

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Abstract
The inferior alveolar nerve was resected at the mandibular foramen and sutured to fascia or muscle to prevent regeneration. This operation affected neither the rate of tooth eruption, the appearance of the gingiva, the hardness of the dentine and enamel, nor the incidence of caries. By running rubber bands through the incisal borders of the lower central incisors and attaching their ends to a wire passed around the mandible, incisors with wide apical foramina were retracted into their sockets with sufficient force to cause complete ischemia, and degeneration of the odontoblasts and much of the pulp; upon release, the latter was replaced from compressed tissue at the apex. Following apicoectomy, invasion of the pulp cavity with connective tissue occurs. No odontoblasts regenerate but osteoid tissue is deposited, surrounded by osteoblasts. Tissue possessing odontoblastic and dentin-forming potentialities appears to be quite specialized and restricted to an area at the apex.
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