Presentation on theme: "Bruni D., MD; Gagliardi M.,MD; Raspugli G.,MD; Grassi A., MD; Marko T.,MD; Akkawi I.,MD; Prof. Marcacci M.,MD. Rizzoli Orthopaedic Institute – Bologna,"— Presentation transcript:
Bruni D., MD; Gagliardi M.,MD; Raspugli G.,MD; Grassi A., MD; Marko T.,MD; Akkawi I.,MD; Prof. Marcacci M.,MD. Rizzoli Orthopaedic Institute – Bologna, Italy
UKA with all-poly tibial component: When using it? Metal-Backed or All poly? Which survival? Which % of failure? Which are most important causes of failure? literature is not UNIQUE !!!
Purposes of the study 1) perform a long-term survival analysis of a large sample of patients treated with UKA with 'all-poly“ tibial component 2) To evaluate the effect of BMI on the incidence of failure of the prosthesis.
Materials and Methods 280 consecutive patients treated with all-poly UKA Average age: 68 years (53-84) 7pt lost at FU Average BMI 28.2 (23-38) Indications for treatment: 187 OA 89 ON
Evaluations: Clinical: BMI,VAS, KSS  & WOMAC  scores Radiographic: Tibio-femoral angle(FTA); Posterior tibial slope (TPS); Tibial plateau angle (TPA) Average Follow Up: 10 years (7-13)  Insall JN, Dorr LD, Scott RD, Scott WN. Rationale of the Knee Society clinical rating system. Clin Orthop Relat Res. 1989 Nov;(248):13-4.  Roos EM, Roos HP, Lohmander LS, Ekdahl C, Beynnon BD. Knee Injury and Osteoarthritis Outcome Score (KOOS)--development of a self-administered outcome measure. J Orthop Sports Phys Ther. 1998 Aug;28(2):88-96.
Discussion: literature vs present study Survival: No. of revisions: Causes of failure: BMI influence: From 85% to 100% at 5-10 years of follow-up 87,6% at 10aa Highly variable until 87% at 5y 9,2%of revised patients in a 134 months FU study «Medial tibial collapse» as 1° cause Aseptic loosening as 1° cause Poor Outcome with BMI >35No SS differences for patients with BMI >30 PRESENT STUDY
Conclusions: UKA with all-poly tibial component 1) Satisfactory survival at more than 10 years of follow up of a large sample of patients with satisfactory clinical and functional outcomes. 2) BMI> 30 have no effect on the incidence of revision