• 제목/요약/키워드: dentistry

검색결과 22,066건 처리시간 0.035초

Indirect short resin post Crown을 이용한 유전치부 심미수복 (ESTHETHIC RESTORATION OF PRIMARY ANTERIOR TEETH BY INDIRECT SHORT RESIN POST CROWN : CASE REPORT)

  • 김효석;한국재;이창섭;이상호
    • 대한소아치과학회지
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    • 제25권3호
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    • pp.627-634
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    • 1998

  • Children who have severely destructive anterior primary dentition, as in nursing-bottle caries, in trauma, in rampant caries and in developmental defects, present the dentist with one of the most perplexing situations in dentistry. Especially, children with managed behavor difficultly is very severly situations. This paper reported a new technique for the utilization of resin post and strip crown to indirect methods on severely destructive primary anterior teeth. We name it "indirect short resin post crown" in this paper. Indirect technique be considered to be a simple, a retentive, intensive, color-stable and esthetic restoration.

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Addendum: Addition of 2 mg dexamethasone to improve the anesthetic efficacy of 2% lidocaine with 1:80,000 epinephrine administered for inferior alveolar nerve block to patients with symptomatic irreversible pulpitis in the mandibular molars: a randomized double-blind clinical trial

Errors in light-emitting diodes positioning when curing bulk fill and incremental composites: impact on properties after aging

  • Abdulrahman A. Balhaddad;Isadora M. Garcia;Haifa Maktabi;Maria Salem Ibrahim;Qoot Alkhubaizi;Howard Strassler;Fabricio M. Collares;Mary Anne S. Melo
    • Restorative Dentistry and Endodontics
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    • 제46권4호
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    • pp.51.1-51.13
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    • 2021

  • Objectives: This study aimed to evaluate the effect of improper positioning single-peak and multi-peak lights on color change, microhardness of bottom and top, and surface topography of bulk fill and incremental composites after artificial aging for 1 year. Materials and Methods: Bulk fill and incremental composites were cured using multi-peak and single-peak light-emitting diode (LED) following 4 clinical conditions: (1) optimal condition (no angulation or tip displacement), (2) tip-displacement (2 mm), (3) slight tip angulation (α = 20°) and (4) moderate tip angulation (α = 35°). After 1-year of water aging, the specimens were analyzed for color changes (ΔE), Vickers hardness, surface topography (Ra, Rt, and Rv), and scanning electron microscopy. Results: For samples cured by single-peak LED, the improper positioning significantly increases the color change compared to the optimal position regardless of the type of composite (p < 0.001). For multi-peak LED, the type of resin composite and the curing condition displayed a significant effect on ΔE (p < 0.001). For both LEDs, the Vickers hardness and bottom/top ratio of Vickers hardness were affected by the type of composite and the curing condition (p < 0.01). Conclusions: The bulk fill composite presented greater resistance to wear, higher color stability, and better microhardness than the incremental composite when subjected to improper curing. The multi-peak LED improves curing under improper conditions compared to single-peak LED. Prevention of errors when curing composites requires the attention of all personnel involved in the patient's care once the clinical relevance of the appropriate polymerization reflects on reliable long-term outcomes.

  • https://doi.org/10.5395/rde.2021.46.e51 인용 PDF

Hard tissue formation after direct pulp capping with osteostatin and MTA in vivo

  • Ji-Hye Yoon;Sung-Hyeon Choi ;Jeong-Tae Koh ;Bin-Na Lee ;Hoon-Sang Chang;In-Nam Hwang; Won-Mann Oh;Yun-Chan Hwang
    • Restorative Dentistry and Endodontics
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    • 제46권2호
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    • pp.17.1-17.9
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    • 2021

  • Objectives: In recent in vitro study, it was reported that osteostatin (OST) has an odontogenic effect and synergistic effect with mineral trioxide aggregate (MTA) in human dental pulp cells. Therefore, the aim of this study was to evaluate whether OST has a synergistic effect with MTA on hard tissue formation in vivo. Materials and Methods: Thirty-two maxillary molars of Spraque-Dawley rats were used in this study. An occlusal cavity was prepared and the exposed pulps were randomly divided into 3 groups: group 1 (control; ProRoot MTA), group 2 (OST 100 μM + ProRoot MTA), group 3 (OST 10 mM + ProRoot MTA). Exposed pulps were capped with each material and cavities were restored with resin modified glass ionomer. The animals were sacrificed after 4 weeks. All harvested teeth were scanned with micro-computed tomography (CT). The samples were prepared and hard tissue formation was evaluated histologically. For immunohistochemical analysis, the specimens were sectioned and incubated with primary antibodies against dentin sialoprotein (DSP). Results: In the micro-CT analysis, it is revealed that OST with ProRoot MTA groups showed more mineralized bridge than the control (p < 0.05). In the H&E staining, it is showed that more quantity of the mineralized dentin bridge was formed in the OST with ProRoot MTA group compared to the control (p < 0.05). In all groups, DSP was expressed in newly formed reparative dentin area. Conclusions: OST can be a supplementary pulp capping material when used with MTA to make synergistic effect in hard tissue formation.

  • https://doi.org/10.5395/rde.2021.46.e17 인용 PDF