Dislocation after Posterior Stabilized Primary Total Knee Replacement: A Rare Complication in Four Cases

Table 1

Patient characteristics.

	M/F	BMI	Age at primary TKA	Time between TKA and dislocation	Design	Comorbidities	Knee alignment at time of initial knee replacement	How was the problem solved?
Case 1	F	34.9	69	2 years	PS	Obesity, lung emphysema, diabetes	Normal	Replace the liner with a thicker one
Case 2	M	23.1	61	2 years	PS	CVA with hemiparesis	Valgus alignment	Replace the liner with a thicker one
Case 3	F	32.6	81	8 months	PS	Obesity, diabetes, atrial fibrillation, hypertension	Normal	Replace the liner with a thicker one
Case 4	F	55.6	46	10 months	PS	Obesity, COPD, depression, lung embolism, Sjögren’s syndrome	Varus alignment	Replace the liner with a thicker one