Guilin Woodpecker Medical Instrument Ai-Pex, Instruction Manual

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3.2.2 Possible causes of false positive results of pulp test
1.The probe touches a large area of the metal restoration or the gums, causing the
current to flow to the periodontal tissue.
2. Insufficient moisture isolation or drying of the tested tooth causes current
leakage to periodontal tissue. Periodontal and pulpal responses are significantly
different. Prior to pulp test, the sensation of the tooth to be tested can be compared
with the direct stimulation of the periodontal tissue.
3. Liquefied necrotic pulp has the potential to conduct current to the periapical
tissue and the patient may have a slight reaction when the current is adjusted to the
maximum scale.
4. What the patient feels is the stimulation of the adjacent teeth.
5. The patient is so stressed and anxious that he/she signals a response when the
probe first touches the tooth surface or when he/she is asked about feelings.
3.2.3 Possible causes of false negative results of pulp test
1. The patient has had prior use of analgesics, narcotics, or alcoholic, etc. that
prevent the teeth from perceiving electrical stimulation properly.
2. The pulp test probe fails to effectively contact the tooth surface, preventing the
transmission of the pulse signal to the pulp.
3. The pulp of newly erupted teeth with immature apices is usually unresponsive
to electrical stimulation.
4. The pulp of over-calcified teeth in the root canal is usually unresponsive to
electrical stimulation and is common in affected teeth of some elderly.
5. Recently traumatized affected teeth may not respond to electrical stimulation.
6. Other conditions that cause degeneration of the dental nerve.
Warning: The pulp test may interfere with the operation of the pacemaker and is
therefore contraindicated in patients with pacemakers in the heart. Please refer to the