1. Ngokusho kokuthi i-posterior cruciate ligament igcinwe yini
Ngokusho kokuthi i-posterior cruciate ligament igcinwe, i-prosthesis eyinhloko yokufakelwa kwamadolo ingahlukaniswa ibe yi-posterior cruciate ligament replacement (Posterior Stabilized, PS) kanye nokugcinwa kwe-posterior cruciate ligament (Cruiate Retention, CR). Eminyakeni yamuva nje, i-tibial plateau yalezi zinhlobo ezimbili ze-prostheses iye yaklanywa ngamazinga ahlukene okuhambisana nobubanzi bekholomu ephakathi ngokuvumelana nokuzinza kwe-joint, umsebenzi we-ligament kanye nomqondo wodokotela ohlinzayo, ukuze kuthuthukiswe ukuzinza kwe-joint kanye nokuthuthukisa ukusebenza kwe-kinematic.
(1) Izici ze-CR kanye ne-PS prostheses:
I-CR prosthesis igcina i-posterior cruciate ligament yeidolo elihlangenefuthi kunciphisa inani lezinyathelo zokuhlinzwa; igwema ukukhishwa okwengeziwe kwe-condyle ye-femoral futhi igcina amathambo; ngokwethiyori, ingakhuphula ukuzinza kwe-flexion, inciphise ukufuduka kwangaphambili okuyindida, futhi ifinyelele ukuhlehla emuva. Isiza ekulondolozeni ubunikazi.
I-PS prosthesis isebenzisa isakhiwo sekholomu ye-cam esikhundleni somsebenzi wesiphambano esingemuva ekwakhiweni, ukuze i-femoral prosthesis ikwazi ukuhlehliswa emuva ngesikhathi semisebenzi yokugoba. Ngesikhathi sokuhlinzwa, i-intercondylar femorali-osteotomy iyadingeka. Ngenxa yokususwa kwe-posterior cruciate ligament, igebe le-flexion likhulu, ukuhamba kwe-posterior kulula, futhi ibhalansi ye-ligament ilula futhi iqondile.
(2) Izinkomba ezihlobene ze-CR kanye ne-PS prostheses:
Iningi leziguli ezibhekana ne-primary total knee arthroplasty zingasebenzisa i-CR prosthesis noma i-PS prosthesis, futhi ukukhethwa kwe-prosthesis kuncike ikakhulukazi esimweni sesiguli kanye nolwazi lukadokotela. Kodwa-ke, i-CR prosthesis ifaneleka kakhulu ezigulini ezinomsebenzi ojwayelekile we-posterior cruciate ligament, i-hyperplasia yamalunga ethambile, kanye nokukhubazeka kwamalunga okungatheni. Ama-prostheses e-PS angasetshenziswa kabanzi ezindaweni eziningi eziyisisekelo eziphelele zamadolo, kuhlanganise neziguli ezine-hyperplasia enzima kanye nokukhubazeka. Ezigulini ezine-osteoporosis enzima noma ukukhubazeka kwamathambo, izinduku zokwandisa i-intramedullary zingadingeka, futhi ukungasebenzi kahle kwe-collateral ligament kungase kudingeke. Sebenzisa ama-spacers anomkhawulo.
2. Inkundla engaguquki kanye nokufakelwa kweplatifomu ephathekayo
Eyokwenziwai-prosthesis ehlangene yamadoloingahlukaniswa ibe isiteji esinqunyiwe kanye nesikhulumi esithintekayo ngokusho kwendlela yokuxhuma ye-polyethylene gasket kanye ne-metal tibial tray. I-prosthesis yesikhulumi esingaguquki iyingxenye ye-polyethylene egxilwe endaweni ye-tibial ngomshini wokukhiya. Ingxenye ye-polyethylene ye-prosthesis yesikhulumi ehambayo ingahamba ethafeni le-tibial. Ngaphandle kokwenza inhlanganisela ehambayo ne-femoral prosthesis, i-polyethylene spacer iphinde ivumele izinga elithile lokuhamba phakathi kwe-tibial plateau ne-tibial plateau.
I-fixed platform prosthesis gasket ikhiyiwe kubakaki bensimbi, eqinile futhi enokwethenjelwa, futhi isetshenziswa kabanzi. I-geometries yezikhala zokulungisa ingase ihluke kakhulu kumkhiqizi kuya kumkhiqizi ukuze ifane nokwakheka kwazo okuhlukile kwe-femoral futhi kuthuthukiswe i-kinematics oyifunayo. Futhi ingashintshwa kalula ibe yi-shim evimbelayo uma kudingeka.
Isikhathi sokuthumela: Sep-10-2022
