The clinical diagnosis of ankylosis can be made only when the affected tooth gives positive evidence of an inability to move. The inability to move is demonstrated either as a failure of the tooth to move with normal vertical dental alveolar growth or a failure of the tooth to move when the tooth is subjected to an orthodontic force system. This case report describes the autotransplantation of an ankylosed maxillary canine.

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  Dalia I. Sherief, Mohamed M. Kandil, Dina Ahmed El-Refai
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  Oral Biology Research.2021; 45(4): 201.     CrossRef
• The Effectiveness of Clinical Sterilization Methods in Dental Air/water Syringes
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  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
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  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

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.

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

Mouthguards were used to protect boxers from lip lacerations and other soft tissue injuries in the late 19th century. Now they are used various parts of dental treatment, which are sports protective aid, bleaching tray, orthodontic retainer, implant insertion guide tray, splint and so on.

Repeated dislodgement of Class V restoration due to habitual clenching stress should be restored with stress control. Mouthguard can be used as stress relief device.

This case describes methods that can relieve occlusal force to teeth by using mouthguard.

Satisfactory results can be obtained by using mouthguard for retention of repeated dislodgement Class V restorations.

If patients suffered from repeated restorations of Class V due to clenching, mouthguard can be used additional device to relieve the occlusal stress in conservative dentistry.

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• Investigation of the Effects of Teeth Clenching Due to Weight Training on Oral Health
  Sang Min Lee, Eun Chae Lee, Juwon Gong, Chae Eun Jang, Young Sun Hwang
  Journal of Dental Hygiene Science.2024; 24(3): 152.     CrossRef
• Sports-Related Oral and Maxillofacial Injuries: A 5-Year Retrospective Study, Pusan National University Dental Hospital
  Han-Kyul Park, Jin-Young Park, Na-Rae Choi, Uk-Kyu Kim, Dae-Seok Hwang
  Journal of Oral and Maxillofacial Surgery.2021; 79(1): 203.e1.     CrossRef
• Influencing factors on oral and maxillofacial trauma prevention education experience of students majoring in physical education
  Kyeung-Ae Jang
  Journal of Korean society of Dental Hygiene.2014; 14(6): 915.     CrossRef
• Correlation between maxillofacial injury, use of mouth guards and stress in physical education majoring male students
  Jong-Hwa Jang, Jee-Hee Kim
  The Korean Journal of Emergency Medical Services.2013; 17(2): 89.     CrossRef

There are a number of situations where the oral mucosa can be sucked or pressed to produce relatively banal but clinical distinctive changes. The labial and buccal mucosa and tongue may develop protuberances in areas where a tooth is missing or extra space is present. The mucosa is pressed and sucked into these spaces, thus leading to the development of a fibrous hyperplasia.

This case report describes the management of fibrous hyperplasia in oral mucosa.

Fibrous hyperplasia can be formed by habitual pressure or suction in oral mucosa. Treatment of fibrous hyperplasia consists of simple excision and, if feasible, elimination of the cause. And habit control is a important factor for preventing recurrence.

The purpose of this study was to evaluate the physical properties of different self-adhesive resin cements and their shear bond strength on dentin and lithium disilicate ceramic and compare these result with that of conventional resin cement. For this study, four self-adhesive resin cements (Rely-X Unicem, Embrace Wetbond, Mexcem, BisCem), one conventional resin cement (Rely-X ARC) and one restorative resin composite (Z-350) were used. In order to evaluate the physical properties, compressive strength, diametral tensile strength and flexural strength were measured. To evaluate the shear bond strength on dentin, each cement was adhered to buccal dentinal surface of extracted human lower molars. Dentin bonding agent was applied after acid etching for groups of Rely-X ARC and Z-350. In order to evaluate the shear bond strength on ceramic, lithium disilicate glass ceramic (IPS Empress 2) disks were prepared. Only Rely-X ARC and Z-350 groups were pretreated with hydrofluoric acid and silane. And then each resin cement was adhered to ceramic surface in 2 mm diameter. Physical properties and shear bond strengths were measured using a universal testing machine.

Results were as follows

1. BisCem showed the lowest compressive strength, diametral tensile strength and flexural strength. (P<0.05)

2. Self-adhesive resin cements showed significantly lower shear bond strength on the dentin and lithium disilicate ceramic than Rely-X ARC and Z-350 (P<0.05)

In conclusion, self-adhesive resin cements represent the lower physical properties and shear bond strength than a conventional resin cement.

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• Compressive Strength Evaluation in Brazed ZrO2/Ti6Al4V Joints Using Finite Element Analysis
  Ashutosh Sharma, Se Ho Kee, Flora Jung, Yongku Heo, Jae Pil Jung
  Journal of Materials Engineering and Performance.2016; 25(5): 1722.     CrossRef
• Shear bond strength of a self-adhesive resin cement to resin-coated dentin
  Jee-Youn Hong, Cheol-Woo Park, Jeong-Uk Heo, Min-Ki Bang, Jae-Jun Ryu
  The Journal of Korean Academy of Prosthodontics.2013; 51(1): 27.     CrossRef
• Effect of curing modes on micro-hardness of dual-cure resin cements
  Ki-Deok Lee, Se-Hee Park, Jin-Woo Kim, Kyung-Mo Cho
  Journal of Korean Academy of Conservative Dentistry.2011; 36(2): 132.     CrossRef
• The effect of the strength and wetting characteristics of Bis-GMA/TEGDMA-based adhesives on the bond strength to dentin
  Eun-Sook Park, Chang-Keun Kim, Ji-Hyun Bae, Byeong-Hoon Cho
  Journal of Korean Academy of Conservative Dentistry.2011; 36(2): 139.     CrossRef