Prosthesis dinhmun: Uka prosthesis overhang hian eng nghawng nge a thlen ang?

Unicompartmental knee arthroplasty (UKA) hi unicompartmental osteoarthritis enkawlna atana total knee arthroplasty (TKA) ai chuan surgical alternative a ni. Mahse, UKA hlawhchhamna rate data-ah chuan kum 7 chhunga damchhuah rate 74% a ni a, hei hi TKA (92%) aiin a hniam zawk hle. Damlote ngeiin an thil neihte chu a chhiat theihna a tipung a, chu chu damlo naupang zawkte leh body mass index (BMI) sang zawk te hian UKA hlawhchham theihna a tipung thei a, mahse surgical technical errors hi a hmaa hlawhchhamna thlen theihna tur risk factor pawimawh takah ngaih a ni. UKA-ah chuan optimal prosthetic alignment leh overhang (Overhang) neih a harsa hle. Tibial prosthesis chu soft tissue irritation ti tlem thei ang bera size leh dah tur a ni a, medial tibial overhang 3 mm aia tam chu Oxford knee score tlahniam (OKS) leh natna tihpunna atana risk factor lian tak a nih thu hmuhchhuah a ni bawk. He zirchianna hian a tum ber chu UKA-a clinical leh imaging outcome zawng zawng tehna a ni. A tum ber pahnihna chu prosthetic malalignment leh overhang in implant dam khawchhuahna a nghawng dan tehna a ni.Unicompartmental knee arthroplasty (UKA) hi unicompartmental osteoarthritis enkawlna atana total knee arthroplasty (TKA) ai chuan surgical alternative a ni. Mahse, UKA hlawhchhamna rate data-ah chuan kum 7 chhunga damchhuah rate 74% a ni a, hei hi TKA (92%) aiin a hniam zawk hle. Damlote ngeiin an thil neihte chu a chhiat theihna a tipung a, chu chu damlo naupang zawkte leh body mass index (BMI) sang zawk te hian UKA hlawhchham theihna a tipung thei a, mahse surgical technical errors hi a hmaa hlawhchhamna thlen theihna tur risk factor pawimawh takah ngaih a ni. UKA-ah chuan optimal prosthetic alignment leh overhang (Overhang) neih a harsa hle. Tibial prosthesis chu soft tissue irritation ti tlem thei ang bera size leh dah tur a ni a, medial tibial overhang 3 mm aia tam chu Oxford knee score tlahniam (OKS) leh natna tihpunna atana risk factor lian tak a nih thu hmuhchhuah a ni bawk. He zirchianna hian a tum ber chu UKA-a clinical leh imaging outcome zawng zawng tehna a ni. A tum ber chu prosthetic malalignment leh overhang in implant dam khawchhuahna a nghawng dan tehna a ni.

Thiltih dan .

He zirchianna hi single-center study a ni a, kan institution-ah January 2008 atanga December 2017 thleng khan medial UKA nei mipa leh hmeichhia te an tel a, damlo zawng zawngte chuan standard method hmangin UKA an nei vek a ni.UKA-a exclusion criteria-ah hian valgus deformity na tak, patellofemoral compartment arthritis, leh instability te an tel a ni. Clinical leh imaging result chu clinical record leh institutional database te retrospective review atanga lak a ni. Fixed-platform leh movable-platform zawng zawng Ukasas te tan radiograph-ah femoral coronal leh sagittal angle (FCA leh FSA) leh tibial coronal leh sagittal angle (TCA leh TSA) te chu teh a ni a, a hnuaia tarlan ang hian.

Nghawngchhuah

Mean follow-up chu kum 4.9 (0.03 atanga kum 10.2) a ni. Revision surgery 36 kan hmuchhuak a, kum 3.7 (kum 3.7 (0.03 to 8.7) postoperative-ah leh cumulative failure rate 14.2% a ni. Kum 5 chhunga dam khawchhuahna chu 88.0% (95% confidence interval [CI]=82.0% to 91.0%) a ni a, kum 10 damchhuah chu 70.0% (95% CI=56.0% to 80.0%) a ni.

Revision chhan tam ber chu prosthesis alignment tha lo/unstable lo (31%), mechanical failure (22%), osteoarthritis natna (14%), leh hriat theih loh natna (8%) te an ni.

Ukas zinga 11.9% chauhvin alignment leh prosthetic coverage duh zawng zawng an nei vek a ni. Prosthesis anterior overhang chu UKA hlawhchhamna (10.0% failure rate, p=0.090) risk factor lian tham a ni lo va, prosthesis posterior overhang (25.0%, p=0.006) leh prosthesis medial overhang (38.2%, p<0.001) te chu UK-a hlawhchhamna tur atana risk pawimawh tak a ni.

Sawiho

He zirchiannaah hian medial UKA-a clinical leh imaging outcome leh prosthetic alignment leh overhang-in nghawng a neih dan kan zirchiang a. Kum 5 leh 10 chhunga damchhuah zat chu 88% leh 70% a ni a, TKA aiin a hniam zawk hle. Revision atana hman tlanglawn ber chu prosthetic alignment tha lo, mechanical failure, leh osteoarthritis hmasawnna te a ni. Prosthesis alignment tha lo leh posterior leh medial overhang te hi UKA siamthatna atana risk factor pawimawh tak a ni.

Literature chhuah tawhah chuan UKA hlawhchhamna thlentu lian ber pahnih chu aseptic loosening leh osteoarthritic progression te an ni a, chung pahnih chuan load distribution inang lo tak tak an nei a, hei hian a chunga kan sawi tak Uka hlawhchhamna chhan hi mechanical in nature a ni thei tih a tilang. He evidence hian prosthesis alignment tha lo hi UKA hmasa lama hlawhchhamna thlentu a nih theih thu a tarlang. Chuvangin, UKA prosthesis alignment tihchangtlunna tur leh overhang lo awm tur tihtlem nan surgical technique tihchangtlunna tura hmalakna tur a ni tih kan ring.

Tuna kan thil hmuhchhuahte hian prosthesis alignment tha lo/overhang leh revision hlauhawmna inzawmna nghet tak chuan he zirchiannaa hlawhchhamna rate sang tak hmuhchhuah theihna tur mechanism awm thei a nih thu a sawi a ni. Surgeon-in prosthesis dahna hmuna a dik reng theihna hi UKA damchhuahna rate tihsan nana puitu pawimawh tak a ni.

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