Mismatched knee implants in Indonesian and Dutch patients: a need for increasing the size

Abstract

Purpose The aim of this study was to evaluate the anthropometric diferences between knees of Indonesian Asians and Dutch Caucasians and the it of nine diferent knee implant systems. Methods A total of 268 anteroposterior (AP) and lateral knee preoperative radiographs from 134 consecutive patients scheduled for total knee arthroplasty at two diferent centres in Jakarta and Leiden were included. Both patient groups were matched according to age and sex and included 67 Asians and 67 Caucasians. We assessed the radiographic diferences between the Asian and Caucasian anthropometric data. The dimensions of the nine knee implant designs (Vanguard, Genesis II, Persona Standard, Persona Narrow, GK Sphere, Gemini, Attune Standard, Attune Narrow, and Sigma PFC) were compared with the patients' anthropometric (distal femur and proximal tibia) measurements. ResultsThe Dutch Caucasian patients had larger mediolateral (ML) and AP femoral and tibial dimensions than the Indonesian Asians. The aspect ratios of the distal femur and tibia were larger in Asians than in Caucasians. The AP and ML dimensions were mismatched between the tibial components of the nine knee systems and the Asian anthropometric data. Both groups had larger ML distal femoral dimensions than the knee systems. Conclusion Absolute and relative diferences in knee dimensions exist not only between Asian and Caucasian knees but also within both groups. Not all TKA systems had a good it with the Asian and Caucasian knee phenotypes. An increase in the range of available knee component sizes would be beneicial, although TKA remains an adequate compromise. Level of evidence III.

No difference in patient-reported satisfaction after 12 months between customised individually made and off-the-shelf total knee arthroplasty

“…Classical off-the-shelf (OTS) TKA can cause implant overhang, malalignment and abnormal kinematics [ 20 , 41 ]. One reason may be the high variability of knee phenotypes between individuals, ethnicities and sex [ 4 , 7 , 13 , 19 , 22 ]. Customised individually made (CIM) TKA have been developed to overcome these problems and improve outcome after TKA [ 5 , 17 , 44 ].…”

Western-designed total knee implants mismatch Saudi patient knees

“…The recently available new implant design with narrow femoral components have addressed this problem to some extent in Saudi patients undergoing knee replacement. 17 Our study indicated that the available prostheses that are mostly used in Caucasian patients, with the exception of the recently available anatomical knee prosthesis, may be larger than ideal for Saudi patients. 17 …”

“… 17 Our study indicated that the available prostheses that are mostly used in Caucasian patients, with the exception of the recently available anatomical knee prosthesis, may be larger than ideal for Saudi patients. 17 …”

Morphology characters of resected femoral and tibial surface in chinese population: intraoperative anthropometric study in patients at a tertiary hospital

“…A recent study compared Asians and Dutch Caucasians in Indonesia. Measurement of radiography found that Caucasians had large AP and ML size in both femur and tibia, The ML/AP ratios of both sides were higher in Asians, suggesting a wider surface in given AP [ 33 ]. Kim et al conducted a systematic review of knee morphology based on 30 studies (9050 knees); the result showed that white people had larger knee sizes with reduced ML/AP ratio [ 9 ].…”