TrueKnee Resurfacing · Evidence

Published evidence. Defined limits.

Original papers, study designs, findings, and limitations relevant to the surgical discussion.

Evidence for components of the technique.

These selected papers address surgical access, alignment, anatomic landmarks, and activity after arthroplasty. They do not evaluate TrueKnee Resurfacing as a complete technique or establish its comparative superiority.

This site does not yet report a validated TrueKnee outcomes dataset or comparative results. Anatomical rationale and radiographic accuracy should be distinguished from patient-reported benefit, implant survival, and return to sport.

Activities after surgery

Umbrella review of seven systematic reviews of total and partial knee replacement.

The review supports return to low-impact activities, including cycling and golf. Moderate-impact sports require individual consideration; long-term evidence for high-impact sport is insufficient.

Limits. Mixed procedures and underlying studies. This is not a TrueKnee Resurfacing comparison, and it does not establish a pickleball-specific recommendation or a guaranteed return date.

Return to sport post-knee arthroplasty: an umbrella review for consensus guidelines ↗

Lester D, et al. Bone Jt Open. 2022;3(3):245–251.

Early recovery

Meta-analysis of 20 randomized trials involving 1,893 knee replacements.

Subvastus access was associated with earlier straight-leg raise (1.7 days), less day-one pain (0.8 points on a 10-point scale), and greater motion at one week (7°). Knee Society Scores did not differ at six weeks or one year; operating time was longer.

Limits. Results concern surgical access, not implant alignment or the complete TrueKnee technique. Study methods varied; early differences do not establish a lasting functional advantage.

Medial subvastus versus the medial parapatellar approach for total knee replacement: A systematic review and meta-analysis of randomized controlled trials ↗

Berstock JR, et al. EFORT Open Rev. 2018;3(3):78–84.

Implant alignment

Single-center randomized trial comparing kinematic and mechanical alignment at ten years.

The trial found no statistically significant difference in patient-reported outcomes or revision-free survival at ten years.

Limits. One trial using specific implants and instrumentation. A nonsignificant difference is not proof of equivalence; the findings cannot settle every personalized alignment strategy or rare complication risk.

No Difference in 10-year Clinical or Radiographic Outcomes Between Kinematic and Mechanical Alignment in TKA: A Randomized Trial ↗

Gibbons JP, et al. Clin Orthop Relat Res. 2025;483(1):140–149. Published online 2024.

Anatomic landmarks

Retrospective case-control study: 34 landmark-guided and 34 matched conventional knee replacements.

Landmark guidance reduced the proportion of tibial angle measurements outside the study’s target range.

Limits. Small, single-surgeon study of early radiographic accuracy. It does not demonstrate better patient-reported function, faster recovery, return to sport, or longer implant survival.

Specific tibial landmarks to improve to accuracy of the tibial cut during total knee arthroplasty. A case control study ↗

Parratte S, et al. Arch Orthop Trauma Surg. 2024;144:4101–4108.

References for the surgical illustrations.

The [S1]–[S20] markers beside the teaching sections match the sources below. Study type and scope are stated so an anatomy study, technical report, or illustration is not mistaken for a clinical outcome trial. Selected sources checked September 17, 2026.

[S1] Retrospective radiographic comparison
Better restoration of joint line obliquity in tibia first restricted kinematic alignment versus mechanical alignment TKA. ↗
Shichman I, Hadad A, Brandstetter AS, Ashkenazi I, Warschwaski Y, Gold A, Snir N. Arch Orthop Trauma Surg. 2024;144(9).
DOI: 10.1007/s00402-024-05551-8
Scope & limitations. 200 patients; between-group difference in joint-line obliquity change did not reach statistical significance (p=0.09). Does not establish better clinical outcomes.
[S2] Resection accuracy cohort
Femoral resection accuracy and precision in manual caliper-verified kinematic alignment total knee arthroplasty. ↗
Scott DF, Horton EN. J Exp Orthop. 2025;12(2).
DOI: 10.1002/jeo2.70234
Scope & limitations. 385 consecutive patients. Supports caliper verification of femoral resections; does not compare patient outcomes or establish a universal resection thickness.
[S3] MRI anatomy study
Femoral bone and cartilage wear is predictable at 0° and 90° in the osteoarthritic knee treated with total knee arthroplasty. ↗
Nam D, Lin KM, Howell SM, Hull ML. Knee Surg Sports Traumatol Arthrosc. 2014;22(12).
DOI: 10.1007/s00167-014-3080-8
Scope & limitations. 208 osteoarthritic knees. Distal and posterior wear differ; cohort means are not patient-specific cartilage measurements.
[S4] Prospective multicenter cartilage study
Validation of Articular Cartilage Depth in Total Knee Arthroplasty. ↗
Johnson EP, Brown NM, Hellman MD, Calkins TE, Hou N, Crockarell JR, Guyton JL, Holland CT, Mihalko WM, Ford MC. Arthroplast Today. 2025;35.
DOI: 10.1016/j.artd.2025.101869
Scope & limitations. 806 TKA cases. Cartilage thickness varies by location and patient factors; a fixed thickness is not appropriate for every knee.
[S5] Retrospective case-control study
Specific tibial landmarks to improve to accuracy of the tibial cut during total knee arthroplasty. A case control study. ↗
Parratte S, Azmi Z, Daxelet J, Argenson JN, Batailler C. Arch Orthop Trauma Surg. 2024;144(9).
DOI: 10.1007/s00402-024-05428-w
Scope & limitations. 34 landmark-guided and 34 matched controls; two-month radiographs. Accuracy evidence, not proof of superior function or survivorship.
[S6] Radiographic classification and randomized balance comparison
Coronal Plane Alignment of the Knee (CPAK) classification. ↗
MacDessi SJ, Griffiths-Jones W, Harris IA, Bellemans J, Chen DB. Bone Joint J. 2021;103-B(2).
DOI: 10.1302/0301-620x.103b2.bjj-2020-1050.r1
Scope & limitations. 500 healthy and 500 arthritic knees; 138 randomized TKAs in the balance comparison. Phenotype frequencies and intraoperative balance are not long-term patient outcomes.
[S7] Radiographic classification study
Surgically Relevant Knee Phenotypes: The Modified Coronal Plane Alignment of the Knee System-A Deep Learning-Based Classification. ↗
Burgio C, Zepeda KE, Karasavvidis T, Jang SJ, Mayman DJ, Jerabek SA, Sculco PK, Debbi EM, Vigdorchik JM. J Arthroplasty. 2026;41(S1).
DOI: 10.1016/j.arth.2026.04.010
Scope & limitations. 1,944 knees classified using automated radiographic measurements. Distinct from original CPAK; does not validate the animation or establish clinical superiority.
[S8] Retrospective CT anatomy study
Phenotyping the knee in young non-osteoarthritic knees shows a wide distribution of femoral and tibial coronal alignment. ↗
Hirschmann MT, Moser LB, Amsler F, Behrend H, Leclercq V, Hess S. Knee Surg Sports Traumatol Arthrosc. 2019;27(5).
DOI: 10.1007/s00167-019-05508-0
Scope & limitations. 308 young, non-osteoarthritic knees. Describes anatomical variation; applicability to older arthritic knees requires judgment.
[S9] Cadaveric CT axis study
Difference between the epicondylar and cylindrical axis of the knee. ↗
Eckhoff D, Hogan C, DiMatteo L, Robinson M, Bach J. Clin Orthop Relat Res. 2007;461.
DOI: 10.1097/blo.0b013e318112416b
Scope & limitations. 23 specimens. Anatomical axis differences do not by themselves establish an optimal surgical target or outcome benefit.
[S10] Anatomical methods report
Three-dimensional mechanics, kinematics, and morphology of the knee viewed in virtual reality. ↗
Eckhoff DG, Bach JM, Spitzer VM, Reinig KD, Bagur MM, Baldini TH, Flannery NM. J Bone Joint Surg Am. 2005;87 Suppl 2.
DOI: 10.2106/jbjs.e.00440
Scope & limitations. Related to the 2007 Eckhoff axis report; matching sample and statistics are not counted as independent confirmation.
[S11] Cadaveric kinematics study
The axes of rotation of the knee. ↗
Hollister AM, Jatana S, Singh AK, Sullivan WW, Lupichuk AG. Clin Orthop Relat Res. 1993;(290).
Scope & limitations. Six specimens. A distinct axis model; should not be merged with other models into a single validated surgical prescription.
[S12] Normal-knee stress MRI study
The flexion gap in normal knees. An MRI study. ↗
Tokuhara Y, Kadoya Y, Nakagawa S, Kobayashi A, Takaoka K. J Bone Joint Surg Br. 2004;86(8).
DOI: 10.1302/0301-620x.86b8.15246
Scope & limitations. 20 knees at 90° showed greater lateral opening under stress. These are native-knee observations, not prescribed TKA gap sizes.
[S13] Retrospective TKA cohort
Lateral Laxity in Flexion Influences Patient-Reported Outcome After Total Knee Arthroplasty. ↗
Okamoto N, Nakamura E, Masuda T, Hisanaga S, Miyamoto T. Indian J Orthop. 2024;58(1).
DOI: 10.1007/s43465-023-01045-8
Scope & limitations. 98 knees. Excessive lateral laxity was associated with worse symptom scores; satisfaction and activity scores did not differ. Measurement load and implant context matter.
[S14] Unloaded cadaver MRI study
Tibiofemoral movement 1: the shapes and relative movements of the femur and tibia in the unloaded cadaver knee. ↗
Iwaki H, Pinskerova V, Freeman MA. J Bone Joint Surg Br. 2000;82(8).
DOI: 10.1302/0301-620x.82b8.10717
Scope & limitations. Six knees. Supports asymmetric native motion as a teaching reference, not an invariant pattern for every living knee.
[S15] Living-knee MRI study
Tibiofemoral movement 2: the loaded and unloaded living knee studied by MRI. ↗
Hill PF, Vedi V, Williams A, Iwaki H, Pinskerova V, Freeman MA. J Bone Joint Surg Br. 2000;82(8).
DOI: 10.1302/0301-620x.82b8.10716
Scope & limitations. 13 unloaded and seven loaded knees. Loading altered movement, including medial forward translation; medial stability does not mean zero motion.
[S16] Living-knee loaded and unloaded MRI study
Tibio-femoral movement in the living knee. A study of weight bearing and non-weight bearing knee kinematics using 'interventional' MRI. ↗
Johal P, Williams A, Wragg P, Hunt D, Gedroyc W. J Biomech. 2005;38(2).
DOI: 10.1016/j.jbiomech.2004.02.008
Scope & limitations. Describes load-dependent motion and deeper-flexion changes. Animation values are illustrative, not measurements from the displayed model.
[S17] Anatomy and kinematics review
The movement of the normal tibio-femoral joint. ↗
Freeman MA, Pinskerova V. J Biomech. 2005;38(2).
DOI: 10.1016/j.jbiomech.2004.02.006
Scope & limitations. Synthesizes native motion studies; not an independent clinical trial or evidence of implant superiority.
[S18] In-vivo fluoroscopy study
In vivo fluoroscopic analysis of the normal human knee. ↗
Komistek RD, Dennis DA, Mahfouz M. Clin Orthop Relat Res. 2003;(410).
DOI: 10.1097/01.blo.0000062384.79828.3b
Scope & limitations. Five normal knees during five activities. Individual and activity-dependent differences include a lateral-pivot subject.
[S19] 3D component morphology study
Differences in Trochlear Morphology of a New Femoral Component Designed for Kinematic Alignment from a Mechanical Alignment Design. ↗
Hull ML, Simileysky A, Howell SM. Bioengineering (Basel). 2024;11(1).
DOI: 10.3390/bioengineering11010062
Scope & limitations. Two component designs aligned on ten femur-cartilage models. Geometric differences suggest a design rationale; the study did not measure clinical tracking or complication reduction.
[S20] Retrospective clinical comparison
The Influence of Femoral Internal Rotation on Patellar Tracking in Total Knee Arthroplasty Using Gap Technique. ↗
Ko DO, Lee S, Kim JH, Hwang IC, Jang SJ, Jung J. Clin Orthop Surg. 2021;13(3).
DOI: 10.4055/cios20168
Scope & limitations. 245 TKAs. With the gap technique and ligament balance, the internally rotated group did not have significantly greater patellar tilt. Rotation alone does not explain all tracking behavior.

For the separate bearing-design evidence collection, see 16 papers on medial stabilization. Those papers retain their author–year labels and individual findings and limitations. Reviews may include studies also listed individually.

Continue into the sources.

Measure outcomes separately.

Patient check-ins can support a recovery conversation; check-ins alone cannot establish treatment benefit. Any research use requires its own appropriate permissions and methods. Starting a Voyage patient journey is not research consent.

Selected published papers, checked September 17, 2026. This is a curated starting point, not a systematic or exhaustive literature review. Read the linked papers for methods, disclosures, and full context.