Restorative Dentistry & Endodontics

Sung-Ok Hong

7 Articles

Healing outcomes of root canal treatment for C-shaped mandibular second molars: a retrospective analysis: Hye-Ra Ahn, Young-Mi Moon, Sung-Ok Hong, Min-Seock Seo; Restor Dent Endod 2016;41(4):262-270. Published online August 29, 2016; DOI: https://doi.org/10.5395/rde.2016.41.4.262

Objectives

This study aimed to evaluate the healing rate of non-surgical endodontic treatment between C-shaped and non-C-shaped mandibular second molars.

Materials and Methods

Clinical records and radiological images of patients who had undergone endodontic treatment on mandibular second molars between 2007 and 2014 were screened. The periapical index scoring system was applied to compare healing outcomes. Information about preoperative and postoperative factors as well as the demographic data of the patients was acquired and evaluated using chi-square and multinomial logistic regression tests.

Results

The total healing rate was 68.4%. Healing rates for the mandibular second molar were 70.9% in C-shaped canals (n = 79) and 66.6% in non-C-shaped ones (n = 117). The difference was not statistically significant.

Conclusions

The presence of a C-shaped canal in the mandibular second molar did not have a significantly negative effect on healing after treatment. Instead, proper pulpal diagnosis and final restoration were indicated as having significantly greater influence on the healing outcomes of C-shaped and non-C-shaped canals, respectively.

Citations

Citations to this article as recorded by

Predicting early endodontic treatment failure following primary root canal treatment
Young-Eun Jang, Yemi Kim, Sin-Young Kim, Bom Sahn Kim
BMC Oral Health.2024;[Epub] CrossRef
Factors Influencing Non-Surgical Root Canal Treatment Outcomes in Mandibular Second Molars: A Retrospective Cone-Beam Computed Tomography Analysis
Da-Min Park, Woo-Hyun Seok, Ji-Young Yoon
Journal of Clinical Medicine.2024; 13(10): 2931. CrossRef
Retrospective Assessment of Healing Outcome of Endodontic Treatment for Mandibular Molars with C-shaped Root Canal
Kishore Kumar Majety, Basanta Kumar Choudhury, Anika Bansal, Achla Sethi, Jaina Panjabi
The Journal of Contemporary Dental Practice.2017; 18(7): 591. CrossRef

200 View
4 Download
3 Crossref

Healing after horizontal root fractures: 3 cases with 2-year follow-up: Yoorina Choi, Sung-Ok Hong, Seok-Ryun Lee, Kyung-San Min, Su-Jung Park; Restor Dent Endod 2014;39(2):126-131. Published online March 21, 2014; DOI: https://doi.org/10.5395/rde.2014.39.2.126

Abstract PDF PubReader ePub

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.

Citations

Citations to this article as recorded by

Clinical applications of calcium silicate‐based materials: a narrative review
S Küçükkaya Eren
Australian Dental Journal.2023;[Epub] CrossRef
A three-dimensional finite element analysis of stress distribution in maxillary central incisor with a horizontal mid root fracture after various management protocols
Kavitha Anantula, Bhavana Vankayala, SarjeevSingh Yadav
Journal of Conservative Dentistry.2021; 24(5): 470. CrossRef
: The Use of Mineral Trioxide Aggregate in The Treatment of Horizontal Root Fractures: A Case Presentation and Literature Update
Elif BALLIKAYA, Hamdi GÜNGÖR
Selcuk Dental Journal.2021; 8(3): 850. CrossRef
Mineral trioxide aggregate and other bioactive endodontic cements: an updated overview – part II: other clinical applications and complications
M. Torabinejad, M. Parirokh, P. M. H. Dummer
International Endodontic Journal.2018; 51(3): 284. CrossRef

245 View
1 Download
4 Crossref

Power density of various light curing units through resin inlays with modified layer thickness: Sung-Ok Hong, Yonghui Oh, Jeong-Bum Min, Jin-Woo Kim, Bin-Na Lee, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh, Hoon-Sang Chang; Restor Dent Endod 2012;37(3):130-135. Published online August 29, 2012; DOI: https://doi.org/10.5395/rde.2012.37.3.130

Abstract PDF PubReader ePub

Objectives

The purpose of this study was to enhance curing light penetration through resin inlays by modifying the thicknesses of the dentin, enamel, and translucent layers.

Materials and Methods

To investigate the layer dominantly affecting the power density of light curing units, resin wafers of each layer with 0.5 mm thickness were prepared and power density through resin wafers was measured with a dental radiometer (Cure Rite, Kerr). The dentin layer, which had the dominant effect on power density reduction, was decreased in thickness from 0.5 to 0.1 mm while thickness of the enamel layer was kept unchanged at 0.5 mm and thickness of the translucent layer was increased from 0.5 to 0.9 mm and vice versa, in order to maintain the total thickness of 1.5 mm of the resin inlay. Power density of various light curing units through resin inlays was measured.

Results

Power density measured through 0.5 mm resin wafers decreased more significantly with the dentin layer than with the enamel and translucent layers (p < 0.05). Power density through 1.5 mm resin inlays increased when the dentin layer thickness was reduced and the enamel or translucent layer thickness was increased. The highest power density was recorded with dentin layer thickness of 0.1 mm and increased translucent layer thickness in all light curing units.

Conclusions

To enhance the power density through resin inlays, reducing the dentin layer thickness and increasing the translucent layer thickness would be recommendable when fabricating resin inlays.

Citations

Citations to this article as recorded by

Effects of layering technique on the shade of resin overlays and the microhardness of dual cure resin cement
Hoon-Sang Chang, Sung-Ok Hong
Brazilian Oral Research.2014;[Epub] CrossRef
Early Hardness and Shear Bond Strength of Dual-cure Resin Cement Light Cured Through Resin Overlays With Different Dentin-layer Thicknesses
H-S Chang, J-W Kim
Operative Dentistry.2014; 39(4): 398. CrossRef
Light curing of dual cure resin cement
Hoon-Sang Chang
Restorative Dentistry & Endodontics.2013; 38(4): 266. CrossRef

184 View
1 Download
3 Crossref

Endodontic management of a C-shaped maxillary first molar with three independent buccal root canals by using cone-beam computed tomography: Lorena Karanxha, Hee-Jin Kim, Sung-Ok Hong, Wan Lee, Pyung-Sik Kim, Kyung-San Min; Restor Dent Endod 2012;37(3):175-179. Published online August 29, 2012; DOI: https://doi.org/10.5395/rde.2012.37.3.175

Abstract PDF PubReader ePub

The aim of this study was to present a method for endodontic management of a maxillary first molar with unusual C-shaped morphology of the buccal root verified by cone-beam computed tomography (CBCT) images. This rare anatomical variation was confirmed using CBCT, and nonsurgical endodontic treatment was performed by meticulous evaluation of the pulpal floor. Posttreatment image revealed 3 independent canals in the buccal root obturated efficiently to the accepted lengths in all 3 canals. Our study describes a unique C-shaped variation of the root canal system in a maxillary first molar, involving the 3 buccal canals. In addition, our study highlights the usefulness of CBCT imaging for accurate diagnosis and management of this unusual canal morphology.

Citations

Citations to this article as recorded by

Nonsurgical endodontic retreatment of C-shaped maxillary molars: case reports and review of literature
Ming Liu, Yanling Huang, Yixuan Wu, Yi Zhang, Zhisheng Zhang, Qianju Wu
BMC Oral Health.2024;[Epub] CrossRef
Analysis of Fused Rooted Maxillary First and Second Molars with Merged and C-shaped Canal Configurations: Prevalence, Characteristics, and Correlations in a Saudi Arabian Population
Mohammed Mashyakhy, Hemant Ramesh Chourasia, Ahmad Jabali, Abdulmajeed Almutairi, Gianluca Gambarini
Journal of Endodontics.2019; 45(10): 1209. CrossRef
C-shaped root canals of mandibular second molars in a Korean population: a CBCT analysis
Hee-Sun Kim, Daun Jung, Ho Lee, Yoon-Sic Han, Sohee Oh, Hye-Young Sim
Restorative Dentistry & Endodontics.2018;[Epub] CrossRef
Prevalence and Characteristics of the Maxillary C-shaped Molar
Jorge N.R. Martins, António Mata, Duarte Marques, Craig Anderson, João Caramês
Journal of Endodontics.2016; 42(3): 383. CrossRef
Use of cone-beam computed tomography and three-dimensional modeling for assessment of anomalous pulp canal configuration: a case report
Alper Sinanoglu, Dilek Helvacioglu-Yigit, Ibrahim Mutlu
Restorative Dentistry & Endodontics.2015; 40(2): 161. CrossRef
Endodontic management of a mandibular second molar with radix entomolaris: a case report
Rosaline Hannah, Deivanayagam Kandaswamy, Nachimuthu Jayaprakash
Restorative Dentistry & Endodontics.2014; 39(2): 132. CrossRef

164 View
2 Download
6 Crossref

Power density of light curing units through resin inlays fabricated with direct and indirect composites: Hoon-Sang Chang, Young-Jun Lim, Jeong-Mi Kim, Sung-Ok Hong; J Korean Acad Conserv Dent 2010;35(5):353-358. Published online September 30, 2010; DOI: https://doi.org/10.5395/JKACD.2010.35.5.353

Abstract PDF PubReader ePub

Objectives

The purpose of this study was to measure the power density of light curing units transmitted through resin inlays fabricated with direct composite (Filtek Z350, Filtek Supreme XT) and indirect composite (Sinfony).

Materials and Methods

A3 shade of Z350, A3B and A3E shades of Supreme XT, and A3, E3, and T1 shades of Sinfony were used to fabricate the resin inlays in 1.5 mm thickness. The power density of a halogen light curing unit (Optilux 360) and an LED light curing unit (Elipar S10) through the fabricated resin inlays was measured with a hand held dental radiometer (Cure Rite). To investigate the effect of each composite layer consisting the resin inlays on light transmission, resin specimens of each shade were fabricated in 0.5 mm thickness and power density was measured through the resin specimens.

Results

The power density through the resin inlays was lowest with the Z350 A3, followed by Supreme XT A3B and A3E. The power density was highest with Sinfony A3, E3, and T1 (p < 0.05). The power density through 0.5 mm thick resin specimens was lowest with dentin shades, Sinfony A3, Z350 A3, Supreme XT A3B, followed by enamel shades, Supreme XT A3E and Sinfony E3. The power density was highest with translucent shade, Sinfony T1 (p < 0.05).

Conclusions

Using indirect lab composites with dentin, enamel, and translucent shades rather than direct composites with one or two shades could be advantageous in transmitting curing lights through resin inlays.

Citations

Citations to this article as recorded by

Comparison of polymerization shrinkage of dual-cure core build-up resin according to shade and curing mode
Yoorina Choi, Karl Lee, Hoon-Sang Chang
Oral Biology Research.2019; 43(4): 243. CrossRef
Early Hardness and Shear Bond Strength of Dual-cure Resin Cement Light Cured Through Resin Overlays With Different Dentin-layer Thicknesses
H-S Chang, J-W Kim
Operative Dentistry.2014; 39(4): 398. CrossRef
Effects of layering technique on the shade of resin overlays and the microhardness of dual cure resin cement
Hoon-Sang Chang, Sung-Ok Hong
Brazilian Oral Research.2014;[Epub] CrossRef
Light curing of dual cure resin cement
Hoon-Sang Chang
Restorative Dentistry & Endodontics.2013; 38(4): 266. CrossRef
Power density of various light curing units through resin inlays with modified layer thickness
Sung-Ok Hong, Yonghui Oh, Jeong-Bum Min, Jin-Woo Kim, Bin-Na Lee, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh, Hoon-Sang Chang
Restorative Dentistry & Endodontics.2012; 37(3): 130. CrossRef

166 View
1 Download
5 Crossref

Effect of infection control barrier thickness on light curing units: Hoon-Sang Chang, Seok-Ryun Lee, Sung-Ok Hong, Hyun-Wook Ryu, Chang-Kyu Song, Kyung-San Min; J Korean Acad Conserv Dent 2010;35(5):368-373. Published online September 30, 2010; DOI: https://doi.org/10.5395/JKACD.2010.35.5.368

Abstract PDF PubReader ePub

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.

Citations

Citations to this article as recorded by

Light curing infection control barriers: do some types jeopardize the concept of conventional bulk-fill composites?
Dalia I. Sherief, Mohamed M. Kandil, Dina Ahmed El-Refai
BMC Oral Health.2024;[Epub] CrossRef
Effects of Infection Control Barriers on Light Output from a Dental Light-Curing Unit Used in Various Positions
Jitte van der Zee, Andrew Tawse-Smith, Sunyoung Ma
Oral.2023; 3(2): 166. CrossRef
Evaluation of irradiance and spectral output of visible light curing units used in the laboratory
Yoorina Choi, Su-Beom Choi, Ji-Hye Jung, Hoon-Sang Chang
Oral Biology Research.2021; 45(4): 201. CrossRef
The Effectiveness of Clinical Sterilization Methods in Dental Air/water Syringes
Seyoung Shin, Yeonmi Yang, Miah Kim, Jaegon Kim, Byeongju Baik
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY.2013; 40(4): 268. CrossRef
Power density of various light curing units through resin inlays with modified layer thickness
Sung-Ok Hong, Yonghui Oh, Jeong-Bum Min, Jin-Woo Kim, Bin-Na Lee, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh, Hoon-Sang Chang
Restorative Dentistry & Endodontics.2012; 37(3): 130. CrossRef
Effect of a multi-layer infection control barrier on the micro-hardness of a composite resin
In-Nam Hwang, Sung-Ok Hong, Bin-Na Lee, Yun-Chan Hwang, Won-Mann Oh, Hoon-Sang Chang
Journal of Applied Oral Science.2012; 20(5): 576. CrossRef

166 View
2 Download
6 Crossref

Root canal treatment of a mandibular second premolar with three separate root canals: Seok-Ryun Lee, Seol-Hee Shin, Sung-Ok Hong, Chang-Kyu Song, Hoon-Sang Chang, Kyung-San Min; J Korean Acad Conserv Dent 2010;35(4):302-305. Published online July 31, 2010; DOI: https://doi.org/10.5395/JKACD.2010.35.4.302

Abstract PDF PubReader ePub

Mandibular premolars show a wide variety of root canal anatomy. Especially, the occurrence of three canals with three separate foramina in mandibular second premolars is very rare. This case report describes the root canal treatment of an unusual morphological configuration of the root canal system and supplements previous reports of the existence of such configuration in mandibular second premolar.

Citations

Citations to this article as recorded by

Effective management of mandibular second premolar with root anomalies
Ashwaq Faia Asiri
Saudi Endodontic Journal.2023; 13(1): 28. CrossRef

176 View
1 Download
1 Crossref

Author index