|Tipo di tesi||Tesi di laurea magistrale|
|Titolo||Confronto tra due diversi metodi di analisi dell'usura di protesi monocompartimentali di ginocchio provenienti da espianti.|
|Titolo in inglese||Comparison between two different methods of wear analysis in unicompartmental knee prostheses from explants|
|Struttura||Dipartimento di Ingegneria "Enzo Ferrari"|
|Corso di studi||Ingegneria Dei Materiali (D.M.270/04)|
|Data inizio appello||2021-10-21|
|Disponibilità||Accessibile via web (tutti i file della tesi sono accessibili)|
Questa tesi ha avuto tre obiettivi distinti: i) studiare il danneggiamento da usura della superficie articolare di protesi di ginocchio monocompartimentali, ii) verificare se questo danneggiamento è influenzato dal tipo di fissaggio al piatto tibiale, e iii) indagare se esistono delle relazioni tra il danneggiamento superficiale, le diverse zone della superficie articolare e le caratteristiche del paziente.
This thesis had three distinct objectives: i) study wear damage to the articular surface of unicompartmental knee prostheses, ii) verify if this damage is influenced by the type of fixation to the tibial plateau, and iii) investigate if exist any relationships between surface damage, different areas of the articular surface, and patient characteristics. Initially, through the use of the rugosimeter, were searched for any differences on bands, identified in the antero-posterior direction, of the articular surface. This analysis showed that the central portion of the articular surface is more representative of the damage that occurs in vivo due to wear. Subsequently, the prostheses analyzed were divided into two groups classified according to the method of fixation to the tibial plateau: all polyethylene and metal backed. Optical profilometer measurements were performed on the two groups thus distinguished in the central portion of the articular surface. The measurements obtained were compared with the previous ones to search for possible discordances. The measurements revealed a discordance between the two measurement methods resulting in a systematic discordance as a function of the measurement. Finally, it was tested whether there is a correlation between surface damage, different areas of the joint surface, and the patient's characteristics. The data suggest that there may be a weak correlation between age and Sz, and between gender and Ssk. The results of this work, although performed on a limited number of prostheses, suggest that: (i) damage is not homogeneous (ii) there is no relationship between rugosimeter and optical profilometer under these conditions iii) Damage is greater in all-polyethylene prostheses iv) That the age and gender of the patient have an impact on the damage of the articular surface. These preliminary results may be confirmed by performing the same analysis on a greater sample of explanted prostheses.