Biomechanical study of a Poly-L-Lactide (PLLA) sternal pin in sternal closure after cardiothoracic surgery Takeshi Saito, MD, Atsushi Iguchi, MD, PhD,

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Presentation transcript:

Biomechanical study of a Poly-L-Lactide (PLLA) sternal pin in sternal closure after cardiothoracic surgery Takeshi Saito, MD, Atsushi Iguchi, MD, PhD, Masahiro Sakurai, MD, PhD, Koichi Tabayashi, MD, PhD The Annals of Thoracic Surgery Volume 77, Issue 2, Pages 684-687 (February 2004) DOI: 10.1016/S0003-4975(03)01341-9

Fig 1 A bioabsorbable Poly-L-Lactide sternal pin for an infant (2 × 2 × 15 mm; Gunze Co, Ayabe, Japan). The Annals of Thoracic Surgery 2004 77, 684-687DOI: (10.1016/S0003-4975(03)01341-9)

Fig 2 The schema of making a wired sternum (A) and fixing it to the testing machine (B). (PLLA = Poly-L-Lactide.) The Annals of Thoracic Surgery 2004 77, 684-687DOI: (10.1016/S0003-4975(03)01341-9)

Fig 3 The schema of forcing a shear stress by a load-cell ([A] an anterior–posterior direction, [B] a cranial–caudal direction). The Annals of Thoracic Surgery 2004 77, 684-687DOI: (10.1016/S0003-4975(03)01341-9)

Fig 4 The actual one scene in the experiment (an anterior–posterior direction). The Annals of Thoracic Surgery 2004 77, 684-687DOI: (10.1016/S0003-4975(03)01341-9)

Fig 5 Stiffness: a wire and intrasternal fixation group (Poly-L-Lactide [PLLA] [+]) versus a wire fixation group (PLLA [−]). (A) An anterior–posterior direction. (B) A cranial–caudal direction. In an anterior–posterior direction, the stiffness was 13.84 ± 1.84 (N/mm) in a wire and intrasternal fixation group (PLLA [+]) and 7.00 ± 2.71 (N/mm) in a wire fixation group (PLLA [−]) (p = 0.0002). In a cranial–caudal direction, it was 10.61 ± 4.88 (N/mm) and 4.38 ± 2.12 (N/mm), respectively (p = 0.03). (PLLA = Poly-L-Lactide.) The Annals of Thoracic Surgery 2004 77, 684-687DOI: (10.1016/S0003-4975(03)01341-9)