The Recurrent Instability of the Patella score, or RIP score, is a clinical calculator used in the field of orthopedics, specifically for patients with recurrent patellar instability. This scoring system is designed to predict the risk of recurrent patellar dislocation. It takes into account factors such as age, gender, trochlear dysplasia, patella alta, and tibial tuberosity-trochlear groove distance. 

The RIP score is particularly useful in guiding treatment decisions for patients with recurrent patellar instability, helping clinicians to determine whether conservative or surgical management is more appropriate. 

Exclusion criteria for the use of the RIP score may include patients with acute patellar dislocation, those with a history of knee surgery, or those with other significant knee pathologies that could influence patellar stability.

Recurrent Instability of the Patella score (RIP score)

# Criteria
 ## Age < 25 years
A. Yes (+2)
B. No (+0)
## Skeletal immaturity
C. Yes (+1)
D. No (+0)
## Dejour A-D dysplasia
E. Yes (+1)
F. No (+0)
## Tibial tubercle to trochlear groove distance/patellar length >= 0.5
G. Yes (+1)
H. No (+0)

# Conditions
- score <= 1
- score <= 3
- score >= 4
- score == 0