Conférence Ardentis sur le domaine dentaire

À la pointe du progrès

Depuis 1997, de nombreux articles ont été publiés dans des journaux scientifiques internationaux à politique éditoriale.

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Les publications

  • Short implants placed with or without grafting into atrophic sinuses. The 5-year results of a prospective randomized controlled study.

    Nedir R., Nurdin N., Abi Najm S., El Hage M., Bischof M.

    Clinical Oral Implants Research

    28(7), 877-886 | 2017

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    Short implants placed with or without grafting into atrophic sinuses. The 5-year results of a prospective randomized controlled study.

    OBJECTIVES:
    Over 5 years, (i) to evaluate the clinical efficiency of 8-mm implants placed with osteotome sinus floor elevation (OSFE) in extremely atrophic maxillae and (ii) to compare bone levels around implants placed with and without grafting.

    MATERIAL AND METHODS:
    TE® SLActive® implants (Institut Straumann AG, Basel, Switzerland) were placed in sites with a residual bone height (RBH) of =4 mm. Before surgery, sinuses were randomized to receive anorganic bovine bone (control) or no graft (test). After 10 weeks of healing, implants were functionally loaded with single crowns. Bone levels were measured from standardized peri-apical radiographs.

    RESULTS:
    Thirty-seven (17 test, 20 control) implants were placed in 12 patients (RBH: 2.4 ± 0.9 mm). Two early and one late failures occurred. The success rate was 91.9% (94.1% test, 90.0% control). All implants gained endo-sinus bone (3.8 ± 1.0 mm test, 4.8 ± 1.2 mm control; P = 0.004). Mean crestal bone loss (CBL) was 0.6 ± 1.1 mm, without a significant difference between the groups (P = 0.527). Mean bone gain and CBL did not change significantly between 1 and 5 years (P = 0.249 and P = 0.293, respectively).

    CONCLUSIONS:
    Atrophic posterior maxillae can be predictably rehabilitated using OSFE with a simultaneous implant placement. The new bone formed around implants after 1 year was stable after 5 years, irrespective of the presence or the absence of graft. Grafting was unnecessary to achieve an average bone augmentation of 3.8 mm, but more bone was gained with grafting.

    KEYWORDS:
    atrophic maxilla, bone gain, bone graft, bone regeneration, crestal bone loss, dental implants, internal sinus lift, no grafting, osteotome sinus floor elevation, posterior maxilla, prospective randomized clinical trial, sinus lift

    doi: 10.1111/clr.12893


    ardentis.ch

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  • Treatment options for the posterior edentulous jaw: Surgical options for the posterior mandible

    Nedir R., Nurdin N., Bischof M.

    Forum Implantologicum

    13(1), 20-26 | 2017

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    Treatment options for the posterior edentulous jaw: Surgical options for the posterior mandible

    This article focuses on the surgical and prosthodontic options for implant placement in the posterior mandible. The authors draw on the existing literature and their 20 years of experience to describe the management of this anatomical region. Contemporary implant dentistry involves established rehabilitation strategies that satisfy the criteria of safety, predictability and short treatment duration in a cost-effective way.

    Keywords: Dental implants, posterior mandible, partial edentulism, fixed partial denture, implant surgery


    ardentis.ch

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  • Restoration of severely damaged endodontically treated premolars: The influence of the endo-core length on marginal integrity and fatigue resistance of lithium disilicate CAD-CAM ceramic endocrowns

    Rocca G.T., Daher R., Saratti C.M., Sedlacek R., Suchy T., Feilzer A.J., Krejci I.

    Journal of Dentistry

    doi.org/10.1016/j.jdent.2017.10.011 | 2017

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    Restoration of severely damaged endodontically treated premolars: The influence of the endo-core length on marginal integrity and fatigue resistance of lithium disilicate CAD-CAM ceramic endocrowns

    Objectives
    To explore fatigue limits of ceramic endocrowns for premolars.

    Methods
    Forty-eight devitalized premolars were cut at the CEJ. They were restored with standardized CAD–CAM lithium disilicate reinforced ceramic restorations (IPS e.max CAD, Ivoclar-Vivadent) and divided into four Groups (n = 12): overlays (Group A, no endo-core, negative control), endocrowns with an endo-core of 2 mm (Group B), 4 mm (Group C) and crowns with post and core (Group D, positive control). All specimens were first submitted to thermo-mechanical cyclic loading (TCML)(1.7 Hz, 49 N, 600000 cycles, 1500 thermo-cycles). Margins were analysed before and after the loading. Survived specimens were then submitted to cyclic isometric stepwise loading (5 Hz, 200N to 1200N) until completion of 105000 cycles or failure. In case of fracture, fragments were analysed using SEM and failure mode was determined. Results of stepwise loading were statistically analysed by Kaplan–Meier life survival analysis and log rank test (p = 0.05).

    Results
    All the specimens survived the TCML test except four specimens of Group A (early restorations' debonding). No difference in percentages of closed margins was found between endocrowns (Groups B, C) and crowns (Group D). After the stepwise test, differences in survival within the groups were not statistically significant. Most of restorations experienced non-reparable fracture.

    Conclusions
    Endocrowns with both 2-mm and 4-mm long endo-cores displayed outcomes after fatigue equivalent to classical crowns. Results of this study discourage the use of flat overlays with only adhesive retention.

    Clinical significance
    When restoring extremely destroyed devitalized premolars, adhesive strategies should be coupled to a macro-mechanical retention in the root.

    Keywords
    Endocrown; CAD-CAM; Lithium disilicate; Endodontically treated; Fatigue; Endo-core; Marginal integrity


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  • Unusual etiology and diagnosis of oroantral communication due to late implant failure

    Nedir R., Nurdin N., Paris M., El Hage M., Abi Najm S., Bischof M.

    Case Reports in Dentistry

    vol. 2017, Article ID 2595036, doi.org/10.1155/2017/2595036. | 2017

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    Unusual etiology and diagnosis of oroantral communication due to late implant failure

    Oroantral communication (OAC) rarely occurs long after implant placement. The present report describes the rare etiology and the difficulty of the diagnosis of an uncommon OAC occurring 10 years after the implant placement in the posterior maxilla. The difficulty of the diagnosis lies in the absence of clinical symptoms of sinusitis and presence of multiunit prosthesis hiding implant failure. This case report supports the need for sinus check-up during a routine implant examination.

    "Case Reports in Dentistry" is an open access journal, meaning that the full-text of all published articles is made freely available on the journal’s website with no subscription or registration barriers.
    Read the article: https://www.hindawi.com/journals/crid/2017/2595036/


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