Use of ultrasound Doppler to determine tooth vitality in a discolored tooth after traumatic injury: its prospects and limitations
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When a tooth shows discoloration and does not respond to the cold test or electricpulp test (EPT) after a traumatic injury, its diagnosis can be even more difficult due tothe lack of proper diagnostic methods to evaluate its vitality. In these case reports, wehope to demonstrate that ultrasound Doppler might be successfully used to evaluatethe vitality of the tooth after trauma, and help reduce unnecessary endodontictreatments. In all three of the present cases, the teeth were discolored after traumaticinjuries and showed negative responses to the cold test and EPT. However, they showeddistinctive vital reactions in the ultrasound Doppler test during the whole observationperiod. In the first case, the tooth color returned to normal, and the tooth showeda positive response to the cold test and EPT at 10 wk after the injury. In the secondcase, the tooth color had returned to its normal shade at 10 wk after the traumaticinjury but remained insensitive to the cold test and EPT. In the third case, thediscoloration was successfully treated with vital tooth bleaching.
Abstract
When a tooth shows discoloration and does not respond to the cold test or electricpulp test (EPT) after a traumatic injury, its diagnosis can be even more difficult due tothe lack of proper diagnostic methods to evaluate its vitality. In these case reports, wehope to demonstrate that ultrasound Doppler might be successfully used to evaluatethe vitality of the tooth after trauma, and help reduce unnecessary endodontictreatments. In all three of the present cases, the teeth were discolored after traumaticinjuries and showed negative responses to the cold test and EPT. However, they showeddistinctive vital reactions in the ultrasound Doppler test during the whole observationperiod. In the first case, the tooth color returned to normal, and the tooth showeda positive response to the cold test and EPT at 10 wk after the injury. In the secondcase, the tooth color had returned to its normal shade at 10 wk after the traumaticinjury but remained insensitive to the cold test and EPT. In the third case, thediscoloration was successfully treated with vital tooth bleaching.
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