Arthroscopic Fixation of Cell Free Polymer-Based Cartilage Implants with a Bioinspired Polymer Surface on the Hip Joint: A Cadaveric Pilot Study

Table 1

Modified criteria for the scaffold evaluation described by Bekkers et al. [23]. The assigned points are given in brackets.

Outline attachment*	Area coverage	Scaffold integrity**	Endpoint fixation***
Unchanged (5)	Unchanged (5)	Unchanged (5)	Cannot be detached (5)
<25% (4)	Shape deformities without structural damage (4)	Shape deformities or minor fissures that are unrelated to fixation (4)	Detached with intensive pull (4)
25–50% (3)	Fissures or cracks without important substances loss (3)	Minor fissures or cracks close to the fixation site (3)	Detached with minor pull (3)
50–75% (2)	<25% of scaffold lost (2)	Fissures or cracks endangering the fixation of the scaffold (2)	Detached with slight touch (2)
75–100% (1)	25–50% of scaffold lost (1)	Fissures or cracks endangering the fixation with surrounding scaffold disorganization (1)	Partial detachment (1)
100% (0)	>50% of scaffold lost (0)	Fissures or cracks endangering the fixation with generalized scaffold disorganization (0)	Total detachment (0)

*% of full circumference that has lost contact with the surrounding cartilage rim.
**% of total cartilage defect that is covered by scaffold.
***The endpoint fixation was tested by a palpation hock manipulation after the motion cycles were completed.