*4.1.3 Patella*

The widely used classification for periprosthetic patellar fractures is the classification proposed by Goldberg et al. which is characterized by fracture configuration, stability of patellar component, and integrity of extensor mechanism [47]. The newer classification described by Ortiguera and Berry focused similarly on the stability of patellar components and integrity of extensor mechanism but differently on the quality of residual bone stock (**Tables 9** and **10**) [36].

#### *Arthroplasty - Advanced Techniques and Future Perspectives*


#### **Table 8.**

*Mayo (Felix) classification.*


#### **Table 9.**

*Goldberg classification.*


**Table 10.** *Ortiguera and Berry classification.*
