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Healing after horizontal root fractures: 3 cases with 2-year follow-up
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Yoorina Choi, Sung-Ok Hong, Seok-Ryun Lee, Kyung-San Min, Su-Jung Park
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Restor Dent Endod 2014;39(2):126-131. Published online March 21, 2014
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DOI: https://doi.org/10.5395/rde.2014.39.2.126
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 Abstract
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Among dental traumas, horizontal root fractures are relatively uncommon injuries. Proper initial management and periodical evaluation is essential for the successful treatment of a root-fractured tooth. If pulpal necrosis develops, endodontic treatment is indicated, exclusively for the coronal fragment. Fragment diastases exert a great influence on healing at the fracture line and on pulpal necrosis. An adequately treated root-fractured tooth has a good prognosis. This case report describes the treatment and 2-yr follow up of 3 maxillary central incisors, first with horizontal root fracture, second with horizontal root fracture and avulsion, and third with horizontal root fracture and lateral luxation. All three cases were treated with mineral trioxide aggregate (ProRoot, Dentsply). During 2 yr of follow-up evaluation, the root-fractured teeth of the present patients were well retained in the arch, showing periodontal healing, even after endodontic treatment.
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Effect of infection control barrier thickness on light curing units
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Hoon-Sang Chang, Seok-Ryun Lee, Sung-Ok Hong, Hyun-Wook Ryu, Chang-Kyu Song, Kyung-San Min
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J Korean Acad Conserv Dent 2010;35(5):368-373. Published online September 30, 2010
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DOI: https://doi.org/10.5395/JKACD.2010.35.5.368
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Abstract
PDFPubReaderePub
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Objectives
This study investigated the effect of infection control barrier thickness on power density, wavelength, and light diffusion of light curing units.
Materials and Methods
Infection control barrier (Cleanwrap) in one-fold, two-fold, four-fold, and eight-fold, and a halogen light curing unit (Optilux 360) and a light emitting diode (LED) light curing unit (Elipar FreeLight 2) were used in this study. Power density of light curing units with infection control barriers covering the fiberoptic bundle was measured with a hand held dental radiometer (Cure Rite). Wavelength of light curing units fixed on a custom made optical breadboard was measured with a portable spectroradiometer (CS-1000). Light diffusion of light curing units was photographed with DSLR (Nikon D70s) as above.
Results
Power density decreased significantly as the layer thickness of the infection control barrier increased, except the one-fold and two-fold in halogen light curing unit. Especially, when the barrier was four-fold and more in the halogen light curing unit, the decrease of power density was more prominent. The wavelength of light curing units was not affected by the barriers and almost no change was detected in the peak wavelength. Light diffusion of LED light curing unit was not affected by barriers, however, halogen light curing unit showed decrease in light diffusion angle when the barrier was four-fold and statistically different decrease when the barrier was eight-fold (p < 0.05).
Conclusions
It could be assumed that the infection control barriers should be used as two-fold rather than one-fold to prevent tearing of the barriers and subsequent cross contamination between the patients.
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KACD
