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Microscope Center, Department of Conservative Dentistry, Yonsei University, Seoul, Korea.
Correspondence to Euiseong Kim, DDS, MSD, PhD. Professor, Microscope Center, Department of Conservative Dentistry, Yonsei University School of Dentistry, 250 Seongsanno, Seodaemun-gu, Seoul, Korea 120-752. TEL, +82-2-2228-3150; FAX, +82-2-313-7575; andyendo@yuhs.ac
• Received: August 26, 2010 • Revised: September 13, 2010 • Accepted: October 19, 2010
Coronal discoloration is a common sequela to traumatic injuries. In subluxation cases, although the injury is not strong enough to rupture the apical vessels, discoloration may appear by tearing thin walls or occluding small capillaries. In absence of infection pulpal regeneration can occur, and as a result discoloration may completely or partially subside. But judging pulpal status by coronal discoloration can be dangerous and it may lead to unnecessary treatment.
This case presents coronal discoloration and recovery following traumatic injury of maxillary anterior teeth. In diagnosing traumatized teeth routine cold tests or electric pulp tests are known to be unreliable, but with the aid of ultrasound doppler imaging, assessing pulp vitality of traumatized teeth can be more accurate.
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Figure 1
Periapical view at the first exam and after tooth reduction.
Figure 2
Periapical view and clinical photo at 2 weeks follow-up (discoloration on #21).
Figure 3
Periapical view and clinical photo at 6 weeks follow-up (discoloration on #21).
Figure 4
Ultrasound doppler graphy imaging on #11, 21, 22 (from top).
Figure 5
Periapical view and clinical photo at 6 weeks follow-up (regain the color on #21).