Ultrasound melted polymer sleeve for improved screw anchorage in trabecular bone-A novel screw augmentation technique
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Autor:innen
Autor:in (Körperschaft)
Publikationsdatum
23.02.2016
Typ der Arbeit
Studiengang
Typ
01A - Beitrag in wissenschaftlicher Zeitschrift
Herausgeber:innen
Herausgeber:in (Körperschaft)
Betreuer:in
Übergeordnetes Werk
Clinical Biomechanics
Themenheft
DOI der Originalpublikation
Reihe / Serie
Reihennummer
Jahrgang / Band
33
Ausgabe / Nummer
Seiten / Dauer
79-83
Patentnummer
Verlag / Herausgebende Institution
Elsevier
Verlagsort / Veranstaltungsort
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
BACKGROUND:
Screw anchorage in osteoporotic bone is still limited and makes treatment of osteoporotic fractures challenging for surgeons. Conventional screws fail in poor bone quality due to loosening at the screw-bone interface. A new technology should help to improve this interface. In a novel constant amelioration process technique, a polymer sleeve is melted by ultrasound in the predrilled screw hole prior to screw insertion. The purpose of this study was to investigate in vitro the effect of the constant amelioration process platform technology on primary screw anchorage.
METHODS:
Fresh frozen femoral heads (n=6) and vertebrae (n=6) were used to measure the maximum screw insertion torque of reference and constant amelioration process augmented screws. Specimens were cut in cranio-caudal direction, and the screws (reference and constant amelioration process) were implanted in predrilled holes in the trabecular structure on both sides of the cross section. This allowed the pairwise comparison of insertion torque for constant amelioration process and reference screws (femoral heads n=18, vertebrae n=12). Prior to screw insertion, a micro-CT scan was made to ensure comparable bone quality at the screw placement location.
FINDINGS:
The mean insertion torque for the constant amelioration process augmented screws in both, the femoral heads (44.2Ncm, SD 14.7) and the vertebral bodies (13.5Ncm, SD 6.3) was significantly higher than for the reference screws of the femoral heads (31.7Ncm, SD 9.6, p<0.001) and the vertebral bodies (7.1Ncm, SD 4.5, p<0.001).
INTERPRETATION:
The interconnection of the melted polymer sleeve with the surrounding trabecular bone in the constant amelioration process technique resulted in a higher screw insertion torque and can improve screw anchorage in osteoporotic trabecular bone.
Schlagwörter
Bone amelioration, Screw anchorage, Augmentation, Trabecular bone, Insertion torque, Primary stability
Fachgebiet (DDC)
Veranstaltung
Startdatum der Ausstellung
Enddatum der Ausstellung
Startdatum der Konferenz
Enddatum der Konferenz
Datum der letzten Prüfung
ISBN
ISSN
0268-0033
1879-1271
1879-1271
Sprache
Englisch
Während FHNW Zugehörigkeit erstellt
Ja
Publikationsstatus
Veröffentlicht
Begutachtung
Peer-Review der ganzen Publikation
Open Access-Status
Lizenz
Zitation
SCHMOELZ, Werner, Raul MAYR, Falko SCHLOTTIG, Nikola IVANOVIC, Romed HÖRMANN und Jörg GOLDHAHN, 2016. Ultrasound melted polymer sleeve for improved screw anchorage in trabecular bone-A novel screw augmentation technique. Clinical Biomechanics. 23 Februar 2016. Bd. 33, S. 79–83. DOI 10.1016/j.clinbiomech.2016.02.010. Verfügbar unter: http://hdl.handle.net/11654/17635