ʻO Φ5.0 Series External Fixation Fixator – Ka radius frame

ʻO nā haʻihaʻi radius distal (DRFs) hiki ke loaʻa i loko o 3 knm o ka ʻaoʻao mamao o ka radius, ʻo ia ka haʻi maʻamau i nā lālā o luna ma waena o nā wahine kahiko a me nā kāne ʻōpio.Ua hōʻike nā haʻawina e pili ana nā DRF i ka 17% o nā haʻihaʻi āpau a me 75% o nā haʻi lima.

ʻAʻole hiki ke loaʻa nā hopena ʻoluʻolu ma o ka hoʻohaʻahaʻa manipulative a me ka hoʻoponopono plaster.Hiki i kēia mau haʻihaʻi ke hoʻololi maʻalahi i ke kūlana ma hope o ka hoʻokele conservative, a hiki mai nā pilikia, e like me ka hui ʻana o ka iwi traumatic a me ka paʻa ʻole o ka hui lima, i ka hopena hope.Hana ʻia nā ʻokiʻoki no ka mālama ʻana i nā haʻihaʻi radius mamao i hiki i nā mea maʻi ke hana i kahi helu kūpono o nā hoʻomaʻamaʻa ʻole e hoʻihoʻi i ka hana maʻamau me ka hōʻemi ʻana i ka hopena o ka loli degenerative a i ʻole ke kīnā.

Hoʻohana ʻia ka mālama ʻana i nā DRF i nā maʻi ma mua o 60 a ʻoi aku ka hoʻohana ʻana i nā ʻenehana maʻamau ʻelima: ʻōnaehana paʻa volar locking plate, non-bridging external fixation, bridging external fixation, percutaneous Kirschner wire fixation, a plaster fixation.

ʻO ka poʻe maʻi e hana ana i ke kaʻina DRF me ka hoʻohaʻahaʻa hāmama a me ka hoʻoponopono kūloko, ʻoi aku ka nui o ka pilikia o ka maʻi ʻeha a me ka tendonitis.

Hoʻokaʻawale ʻia nā fixators waho i ʻelua mau ʻano: cross-joint a me non-bridging.Hoʻopaʻa ʻia kahi mea hoʻoponopono waho cross-articular i ka neʻe manuahi o ka pulima ma muli o kāna hoʻonohonoho ponoʻī.Hoʻohana nui ʻia nā mea hoʻoponopono waho nonbridging no ka mea e ʻae lākou i ka hana hui pū.Hiki i ia mau mea hana ke ho'ēmi i ka haʻihaʻi ma ka hoʻoponopono pololei ʻana i nā ʻāpana haʻihaʻi;Hāʻawi lākou i ka mālama maʻalahi i nā ʻeha o ka ʻiʻo palupalu a ʻaʻole hoʻopaʻa i ka neʻe lima kūlohelohe i ka wā mālama.No laila, ua ʻōlelo nui ʻia nā mea hoʻoponopono waho nonbridging no ka mālama DRF.I nā makahiki i hala iho nei, ua kaulana ka hoʻohana ʻana i nā mea hoʻoponopono maʻamau o waho (titanium alloys), ma muli o ko lākou biocompatibility maikaʻi loa, ka ikaika mechanical kiʻekiʻe a me ke kūpaʻa corrosion.Eia nō naʻe, hiki i nā mea hoʻoponopono kuʻuna kuʻuna i hana ʻia me ka metala a i ʻole ka titanium ke kumu i nā mea hana koʻikoʻi i nā scans computed tomography (CT), i alakaʻi ai i nā mea noiʻi e ʻimi nei i nā mea hou no nā fixators waho.

Ua aʻo ʻia a hoʻohana ʻia ka hoʻoponopono kūloko e pili ana i ka polyetheretherketone (PEEK) ma mua o 10 mau makahiki.Loaʻa i ka mea PEEK nā mea maikaʻi ma mua o nā mea i hoʻohana ʻia no ka hoʻoponopono orthopedic kuʻuna: ʻaʻohe allergies metala, radiopacity, haʻahaʻa haʻahaʻa me ka magnetic resonance imaging (MRI), maʻalahi ka wehe ʻana i ka implant, pale i ka hanana "weld welding", a ʻoi aku ka maikaʻi o nā waiwai mechanical.No ka laʻana, loaʻa iā ia ka ikaika tensile maikaʻi, ka ikaika kulou, a me ka ikaika hopena.

Ua hōʻike ʻia kekahi mau haʻawina he ʻoi aku ka ikaika o nā mea hoʻoponopono PEEK, ʻoi aku ka ʻoi aku o ka ikaika ma mua o nā mea hoʻoponopono metala, a ʻoi aku ka ikaika o ka luhi13.ʻOiai ʻo ka modulus elastic o ka mea PEEK he 3.0–4.0 GPa, hiki ke hoʻoikaika ʻia e ka fiber carbon, a hiki i kona modulus elastic ke kokoke i ka iwi cortical (18 GPa) a i ʻole hiki i ka waiwai o ka titanium alloy (110 GPa) e. ke hoʻololi i ka lōʻihi a me ke kuhikuhi o ka fiber carbon.No laila, ua kokoke ka waiwai mechanical o PEEK i ka iwi.I kēia mau lā, ua hoʻolālā ʻia a hoʻohana ʻia ka mea hoʻoponopono waho waho PEEK i loko o ke keʻena.