• Title/Summary/Keyword: 치아 파절

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Evaluation of static fracture resistances and patterns of pulpless tooth restored with poly-ether-ketone-ketone (PEKK) post (Poly-ether-ketone-ketone (PEKK) 포스트로 수복한 근관 치료 치아의 정적 파절 저항성 및 파절 형태에 관한 평가)

  • Park, Ha Eun;Lee, Cheol Won;Lee, Won Sup;Yang, Sung Eun;Lee, Su Young
    • The Journal of Korean Academy of Prosthodontics
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    • v.57 no.2
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    • pp.127-133
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    • 2019

  • Purpose: The purpose of present study was to investigate fracture strength and mode of failure of endodontically treated teeth restored with metal cast post-core system, prefabricated fiber post system, and newly introduced polyetherketoneketone (PEKK) post-core system. Materials and methods: A total of 21 mandibular premolar were randomly grouped into 3 groups of 7 each according to the post material. Group A was for metal cast post core; Group B for prefabricated glass fiber post and resin core; and Group C for milled PEKK post cores. All specimens were restored with metal crown. The fracture strength of each specimen was measured by applying a static load of 135-degree to the tooth at 2 mm/min crosshead speed using a universal testing machine. After the fracture strength measurement, the mode of failure was observed. The results were analyzed using Kruscal-Wallis test and post hoc Mann-Whitney U test at confidence interval ${\alpha}=.05$. Results: Fracture resistance of PEKK post core was lower than those of cast metal post and fiber reinforced post with composite resin core. In the aspect of fracture mode most of the root fracture occurred in the metal post core, whereas the post detachment occurred mainly in the fiber reinforced post. In the case of PEKK post core, teeth and post were fractured together. Conclusion: It is necessary to select appropriate materials of post for extensively damaged teeth restoration and clinical application of the PEKK post seems to require more research on improvement of strength.

  • https://doi.org/10.4047/jkap.2019.57.2.127 인용 PDF KSCI

A case of direct restore using 4-META/MMA-TBB resin containing organic filler in patients with severe occlusal surface wear and enamel fracture (심한 교합면 마모 및 교두 파절 환자에서 유기필러를 함유한 4-META/MMA-TBB 레진을 활용한 직접수복 증례)

  • Dae-Sik Kim;Gyeong-Je Lee
    • Journal of Dental Rehabilitation and Applied Science
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    • v.39 no.4
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    • pp.222-228
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    • 2023

  • Attrition is the loss of tooth hard tissue due to contact between teeth, and in severe cases, dentin is exposed, accompanied by selective corrosion and excessive wear of teeth, which is called cupping. If these lesions are left untreated, the size of the lesion gradually increases, breaking the unsupported enamel, resulting in a decrease in aesthetics and chewing function. In this case report, patients with cupping and enamel fracture due to severe attrition were directly restored using a resin with soft properties containing organic fillers. In the follow-up observation six years later, most of the filling of the occlusal surface was eliminated, but the filling on the buccal surfaces remained relatively intact, and it was confirmed that this type of resin was suitable for the area where the occlusal force was relatively weak rather than the area where the occlusal force was greatly applied.

  • https://doi.org/10.14368/jdras.2023.39.4.222 인용 PDF

Case report: Laminate prosthesis with orthodontic treatment for achieve anterior esthetics and functional occlusion (심미와 기능 회복을 위한 교정- 라미네이트 수복 치료 증례)

  • Lee, Han Na
    • Journal of the Korean Academy of Esthetic Dentistry
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    • v.23 no.2
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    • pp.80-85
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    • 2014

  • Orthodontic treatment is obviously the first choice to get aligned teeth cause of conservative treatment. But it is impossible to get highly esthetic result only orthodontic treatment in case of peg lateralis, discrepancy tooth size, discolored teeth or fractured teeth. As all treatment does, especially in esthetic treatment it is always required interdisciplinary diagnosis and treatment plan; orthodontics, periodontology, prothetics, implant therapy. As also, the treatment should be maintained long-term treatment with stable and harmonious state by esthetic satisfaction and functional occlusion those who needs various dental care as interdisciplinary treatment. This case is the laminate treatment with the orthodontic treatment on 37 ages/ Female patient who has cross bite at anteriors and premolar area and abrasion on centralis at right maxilla. By orthodontic treatment aligned teeth positions, it makes functional occlusion. As laminate treatment with minimum teeth preparation is able to release anterior esthetics. Follow up check for 2 years has been performed since the final prosthetics delivery to the patient. No sign of relapse, fracture of laminate were detected.

  • https://doi.org/10.15522/JKAED.2014.23.2.80 인용 PDF KSCI