• Full Name: ADRIAN BARRERA FLORES
• Affiliation/Institution: Clinica Cemtro
• Country: Spain

Objectives

The purpose of this systematic retrospective study to know the incidence of clunk in Triathlon PS, Stryker in ATR. Also identify risk factors associated with subsequent radiographic stabilized arthroplasty and inform medium term functional outcomes arthroscopic treatment

Materials and Methods

We systematic retrospectively reviewed cohort of 546 primary TKAs in 476 patients, performed by a single medical team, between January 2010 and December 2022 using the Triathlon PS CS Stryker TKA system. We excluded a total of 35 patients (36 knees): 7 patients (7 knees) received a highly constrained, stemmed TKA or a different design due to severe preoperative deformity or ligamentous instability; 3 patients (four knees) died before the 1-year minimum follow-up; and patients 23 ( 23 knees) did not return for the first year follow-up visit. Two patients (2 knees) underwent reoperation during the first year and were also excluded. The remaining 441 patients (510 knees), representing 93,4% of the original cohort.

Results

9 patients with cluck syndrome were diagnosed and treated via arthroscopy. With an incidence 1,7%, median time to diagnosis of 5.4 months and 8.4 months arthroscopic treatment, 92.2% women, 66.2 years old, while 26.4 months follow-up.Radiographic evaluation showed several technical aspects in position and size of the implants with increased femoral offset and less than 29 mm patellar implant predispose to clunk. No recurrence after treatment to arthroscopic

Conclusions

We believe the current study is the first to report the incidence, and the existence of a relationship between the degree of flexion, the femoral offset higher increase, box design of the femur and the smaller size of the patellar component associated with the likelihood of developing cluck syndrome in this type of prosthesis.

Patellar clunk syndrome is a rare complication, but significant of the total knee arthroplasty. This study confirms that arthroscopy and debridement of clunk is effective treatment option