1. Ngokumalunga nokuba i-posterior cruciate ligament igcinwe
Ngokumalunga nokuba i-posterior cruciate ligament igcinwe, i-prosthesis yokuqala yokufakelwa kwamadolo ingahlulwa ibe yi-posterior cruciate ligament replacement (i-Posterior Stabilized, PS) kunye nokugcinwa kwe-ligament ye-posterior (i-Cruiate Retention, i-CR). Kwiminyaka yakutshanje, i-plateau ye-tibial yezi ntlobo zimbini ze-prostheses ziye zaqulunqwa ngamaqondo ahlukeneyo okuhambelana kunye nobubanzi bekholamu ephakathi ngokwezinzo lwe-joint, umsebenzi we-ligament kunye nombono wogqirha wotyando, ukwenzela ukuba kuphuculwe uzinzo kunye nokuphucula ukusebenza kwe-kinematic.
(1) Iimpawu ze-CR kunye ne-PS prostheses:
I-CR prosthesis igcina i-posterior cruciate ligament yeidolo ngokubambisanakunye nokunciphisa inani lamanyathelo otyando; igwema ukutshatyalaliswa okuqhubekayo kwe-condyle ye-femoral kwaye igcina ithambo; ngokwethiyori, inokonyusa uzinzo lwe-flexion, ukunciphisa i-paradoxical displacement yangaphambili, kunye nokufezekisa ukuqengqeleka ngasemva. Inceda ukulondoloza ukufaneleka.
I-PS prosthesis isebenzisa i-cam-column structure ukuze ithathe indawo yomsebenzi we-posterior cross kwi-design, ukwenzela ukuba i-prosthesis ye-femoral inokubuyiswa emva ngexesha lemisebenzi yokuguqula. Ngexesha lokusebenza, iintercondylar yebhinqai-osteotomy iyafuneka. Ngenxa yokukhutshwa kwe-posterior cruciate ligament, i-gap ye-flexion inkulu, i-posterior maneuver ilula, kwaye ibhalansi ye-ligament ilula kwaye iqonde ngakumbi.
(2) Iimpawu ezizalanayo zeCR kunye ne-PS prostheses:
Uninzi lwezigulane eziphantsi kwe-prosthesis ye-prosthesis ye-prosthesis yeprayimari zingasebenzisa i-CR prosthesis okanye i-PS prosthesis, kwaye ukhetho lweprosthesis luxhomekeke kakhulu kwimeko yesigulane kunye namava ogqirha. Nangona kunjalo, i-CR prosthesis ifaneleka ngakumbi kwizigulane ezinomsebenzi oqhelekileyo we-posterior cruciate ligament, i-hyperplasia edibeneyo edibeneyo, kunye nokukhubazeka okuncinci. I-PS prostheses inokusetyenziswa ngokubanzi kwiindawo ezininzi eziphambili zamadolo, kubandakanywa nezigulane ezine-hyperplasia enzima kunye nokukhubazeka. Kwizigulane ezine-osteoporosis enzima okanye iziphene zamathambo, iintonga zokwandisa i-intramedullary zingafuneka, kwaye ukungasebenzi kwe-collateral ligament kungafuneka. Sebenzisa izikhewu ezithintelayo.
2. Iqonga elizinzileyo kunye neprosthesis yeqonga eshukumayo
Eyokwenziwaidolo ilungu lokwenziwa kwamalunguinokwahlulwa kwiqonga elimiselweyo kunye neqonga elishukumayo ngokwendlela yokudibanisa i-polyethylene gasket kunye ne-metal tibial tray. I-platform ye-prosthesis esisigxina iyingxenye ye-polyethylene egxininiswe kwi-plateau ye-tibial ngendlela yokuvala. Icandelo le-polyethylene ye-prosthesis yeplatifomu ehambayo inokuhamba kwi-plateau ye-tibial. Ukongeza ekwenzeni ukudibanisa okuhambayo kunye ne-femoral prosthesis, i-polyethylene spacer ivumela iqondo elithile lokuhamba phakathi kwe-plateau ye-tibial kunye ne-tibial plateau.
I-platform esisigxina ye-prosthesis gasket ivaliwe kwi-bracket yensimbi, eqinile kwaye inokwethenjelwa, kwaye isetyenziswa ngokubanzi. Iijometri zezikhewu zokulungisa zinokwahluka ngokubanzi ukusuka kumvelisi ukuya kumvelisi ukuze zihambelane neprosthesis yazo ekhethekileyo yasetyhini kunye nokuphucula i-kinematics efunwayo. Isenokutshintshwa ngokulula ibe yi-shim ethintelayo ukuba iyafuneka.
Ixesha lokuposa: Sep-10-2022
