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BIORESORBABLE SELF-TAPPING CANNULATED SCREW FOR LIGAMENT FIXATION
专利权人:
ANTONIAC VASILE IULIAN
发明人:
ANTONIAC VASILE IULIAN,ANTONIAC VASILE IULIAN,LAPTOIU DAN CONSTANTIN,LAPTOIU DAN CONSTANTIN,POPESCU DIANA,POPESCU DIANA,SEMENESCU AUGUSTIN,SEMENESCU AUGUSTIN,AMZA CATALIN GHEORGHE,AMZA CĂTĂLIN GHEORGH
申请号:
RO201100665
公开号:
RO128477A2
申请日:
2011.07.14
申请国别(地区):
RO
年份:
2013
代理人:
摘要:
The invention relates to a bioresorbable self-tapping cannulated screw made of a composite material of the polymer-ceramics type, i.e. poly-L-lactic acid and tricalcium beta-phosphate, for the fixation of soft tendinous tissues or bone-tendon-bone grafts during joint reconstruction surgery. According to the invention, the screw () comprises, at its distal end which represents the screw tip, a cone-shaped zone () provided with a double-pitch thread with three self-tapping channels () of constant depth, stretching all along the said zone. At the proximal end, the screw has a cylindrical shape () of a length which is equal with two thirds of its total length, provided with a double thread having a constant pitch allover its length, continued up to 1 mm from the proximal end (), so that the screw can be completely inserted into the bone. In the truncated cone-shaped part of the screw, the thread () is more aggressive in order to easily penetrate the cortical bone, while, in the cylindrical part, the thread () has a larger leading angle in order to prevent the graft damage. The screw is cannulated, having inside a hexagonal channel whose size is variable along the screw length.Prezenta invenţie se referă la un şurub auto-tarodant, canulat, bioresorbabil, fabricat din material compozit de tip polimer-ceramică, respectiv, acid poli-L-lactic şi-fosfat tricalcic, pentru fixarea ţesuturilor moi tendinoase sau a grefelor de tip os-tendon-os în cursul intervenţiilor articulare reconstructive. Conform invenţiei, şurubul () este format, la partea distală, reprezentând vârful şurubului, dintr-o zonă conică (), prevăzută cu filet cu pas dublu şi cu trei canale () pentru auto-tarodare, având adâncime constantă şi care se întind pe toată lungimea acestei zone. La extremitatea proximală, şurubul are o formă cilindrică () de lungime egală cu două treimi din lungimea sa totală, care este prevăzută cu un filet cu două începuturi, ce are pas constant pe toată lungimea şi se continuă până
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