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  1. Book ; Thesis: Biomechanischer Vergleich verschiedener Osteosynthesetechniken bei osteoporotischen Frakturen des hinteren Beckenrings

    Masaeli, Adrian

    2017  

    Author's details vorgelegt von Adrian Masaeli
    Language German
    Size 104 Seiten, Illustrationen, Diagramme
    Publishing place Marburg
    Publishing country Germany
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Dissertation, Philipps-Universität Marburg, 2017
    Note Zusammenfassung in deutscher und englischer Sprache
    HBZ-ID HT019618840
    Database Catalogue ZB MED Medicine, Health

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    In stock of ZB MED Cologne/Königswinter

    Shelf markLoan statusLocation
    2018 D 287 order for loan Magazin

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  2. Article ; Online: Pull-out strength evaluation of cement augmented iliac screws in osteoporotic spino-pelvic fixation.

    Oberkircher, Ludwig / Masaeli, Adrian / Hack, Juliana / Figiel, Jens / Bliemel, Christopher / Ruchholtz, Steffen / Krüger, Antonio

    Orthopaedics & traumatology, surgery & research : OTSR

    2021  Volume 107, Issue 7, Page(s) 102945

    Abstract: Introduction: Spino-pelvic fixation has been widely accepted for surgical treatment of sacral tumor, scoliosis surgery and pelvic fractures. Cement augmentation of screws is an option to improve implant stability in osteoporotic bone quality. Aim of the ...

    Abstract Introduction: Spino-pelvic fixation has been widely accepted for surgical treatment of sacral tumor, scoliosis surgery and pelvic fractures. Cement augmentation of screws is an option to improve implant stability in osteoporotic bone quality. Aim of the present study is to compare iliac screw fixation without cement fixation and two cement application options in a biomechanical testing.
    Hypothesis: Cement augmentation of iliac screws leads to superior pull-out strength.
    Material and methods: Thirty female and osteoporotic human iliac bones were used. Three operation treatment groups were generated: Screw fixation (cannulated screws) without cement augmentation [Operation treatment (OT) A], screw fixation with cement augmentation before screw placement (cannulated screws) (OT B) and screw fixation with perforated screws and cement augmentation after screw placement (OTC). Pull-out tests were performed with a rate of 6mm/min. A load versus displacement curve was generated. Maximum pull-out force (N) was measured in the load-displacement curve.
    Results: Paired group 1 (OT A vs. OT B): Screw fixation without cement augmentation: 592.6N±335.07 and screw fixation with cement augmentation before screw placement: 996N±287.43 (p=0.0042). Paired group 2 (OT A vs. OT C): screw fixation without cement augmentation: 716.2N±385.86 and fenestrated screw fixation with cement augmentation after screw placement: 1324.88N±398.76 (p=0.0489). Paired group 3 (OT B vs. OT C): Screw fixation with cement augmentation before screw placement: 1077.2±486.66 and fenestrated screw fixation with cement augmentation after screw placement: 1298.2N±726.19 (p=0.3286).
    Discussion: Regarding iliac screw fixation for spino-pelvic ostesynthesis in osteoporotic bone, cement augmentation is significantly superior to solid iliac screw fixation respecting pull-out-strength. Nevertheless, further biomechanical studies are needed to verify these findings.
    Level of evidence: Not applicable; biomechanical cadaver study.
    MeSH term(s) Biomechanical Phenomena ; Bone Cements ; Bone Screws ; Cadaver ; Female ; Humans ; Ilium/surgery ; Osteoporotic Fractures/diagnostic imaging ; Osteoporotic Fractures/surgery ; Pelvis
    Chemical Substances Bone Cements
    Language English
    Publishing date 2021-04-22
    Publishing country France
    Document type Journal Article
    ISSN 1877-0568
    ISSN (online) 1877-0568
    DOI 10.1016/j.otsr.2021.102945
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Primary stability of three different iliosacral screw fixation techniques in osteoporotic cadaver specimens-a biomechanical investigation.

    Oberkircher, Ludwig / Masaeli, Adrian / Bliemel, Christopher / Debus, Florian / Ruchholtz, Steffen / Krüger, Antonio

    The spine journal : official journal of the North American Spine Society

    2016  Volume 16, Issue 2, Page(s) 226–232

    Abstract: Background: The incidence of osteoporotic and insufficiency fractures of the pelvic ring is increasing. Closed reduction and percutaneous fixation with cannulated sacroiliac screws is well-established in the operative treatment of osteoporotic posterior ...

    Abstract Background: The incidence of osteoporotic and insufficiency fractures of the pelvic ring is increasing. Closed reduction and percutaneous fixation with cannulated sacroiliac screws is well-established in the operative treatment of osteoporotic posterior pelvic ring fractures. However, osteoporotic bone quality might lead to the risk of screw loosening. For this reason, cement augmentation of the iliosacral screws is more frequently performed and recommended.
    Purpose: The aim of the present biomechanical study was to evaluate the primary stability of three methods of iliosacral screw fixation in human osteoporotic sacrum specimens.
    Study design/setting: This study used methodical cadaver study.
    Methods: A total of 15 fresh frozen human cadaveric specimens with osteoporosis were used (os sacrum). After matched pair randomization regarding bone quality (T-score), three operation technique groups were generated: screw fixation (cannulated screws) without cement augmentation (Group A); screw fixation with cement augmentation before screw placement (cannulated screws) (Group B); and screw fixation with perforated screws and cement augmentation after screw placement (Group C). In all specimens both sides of the os sacrum were used for operative treatment, resulting in a group size of 10 specimens per group. One operation technique was used on each side of the sacral bone to compare biomechanical properties in the same bone quality. Pull-out tests were performed with a rate of 6 mm/min. A load versus displacement curve was generated.
    Results: Subgroup 1 (Group A vs. Group B): Screw fixation without cement augmentation: 594.4 N±463.7 and screw fixation with cement augmentation before screw placement: 1,020.8 N±333.3; values were significantly different (p=.025). Subgroup 2 (Group A vs. Group C): Screw fixation without cement augmentation: 641.8 N±242.0 and perforated screw fixation with cement augmentation after screw placement: 1,029.6 N±326.5; values were significantly different (p=.048). Subgroup 3 (Group B vs. Group C): Screw fixation with cement augmentation before screw placement: 804.0 N±515.3 and perforated screw fixation with cement augmentation after screw placement: 889.8 N±503.3; values were not significantly different (p=.472).
    Conclusions: Regarding iliosacral screw fixation in osteoporotic bone, the primary stability of techniques involving cement augmentation is significantly higher compared with screw fixation without cement augmentation. Perforated screws with the same primary stability as that of conventional screw fixation in combination with cement augmentation might be a promising alternative in reducing complications of cement leakage. These biomechanical results have to be transferred into clinical practice and prove their clinical value.
    MeSH term(s) Biomechanical Phenomena ; Bone Screws ; Cadaver ; Fracture Fixation/instrumentation ; Fracture Fixation/methods ; Humans ; Osteoporotic Fractures/surgery
    Language English
    Publishing date 2016-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2037072-6
    ISSN 1878-1632 ; 1529-9430
    ISSN (online) 1878-1632
    ISSN 1529-9430
    DOI 10.1016/j.spinee.2015.08.016
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Conference proceedings: Biomechanischer Vergleich zweier Techniken der Zementaugmentation bei der iliosakralen Schraubenosteosynthese der osteoporotischen Sakrumfraktur unter zyklischer Belastung

    Hack, Juliana / Krüger, Antonio / Masaeli, Adrian / Hörth, Dominik / Ruchholtz, Steffen / Oberkircher, Ludwig

    2016  , Page(s) PO12–658

    Event/congress Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2016); Berlin; ; Berufsverband der Fachärzte für Orthopädie; 2016
    Keywords Medizin, Gesundheit
    Publishing date 2016-10-10
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Conference proceedings
    DOI 10.3205/16dkou536
    Database German Medical Science

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  5. Conference proceedings: Zementaugmentation der ilikalen Schrauben bei der lumbopelvinen Abstützung zur Versorgung osteoporotischer Beckenringfrakturen führt zu einer verbesserten Stabilität – eine biomechanische Untersuchung

    Oberkircher, Ludwig / Masaeli, Adrian / Bliemel, Christopher / Bockmann, Benjamin / Ruchholtz, Steffen / Krüger, Antonio

    2016  , Page(s) WI39–657

    Event/congress Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2016); Berlin; ; Berufsverband der Fachärzte für Orthopädie; 2016
    Keywords Medizin, Gesundheit
    Publishing date 2016-10-10
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Conference proceedings
    DOI 10.3205/16dkou260
    Database German Medical Science

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  6. Conference proceedings: Primärstabilität drei verschiedender Techniken der iliosakralen Schraubenosteosynthese bei osteoporotischen Sakrumfrakturen – eine biomechanische Untersuchung

    Oberkircher, Ludwig / Masaeli, Adrian / Bliemel, Christopher / Eschbach, Daphne / Ruchholtz, Steffen / Krüger, Antonio

    2015  , Page(s) PO21–581

    Event/congress Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2015); Berlin; ; Berufsverband der Fachärzte für Orthopädie; 2015
    Keywords Medizin, Gesundheit ; Osteoporose ; Sakrumfraktur ; Schraubenosteosynthese ; Zementaugmentation
    Publishing date 2015-10-05
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Conference proceedings
    DOI 10.3205/15dkou710
    Database German Medical Science

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