Retreatment Predictions in Odontology by means of CBR Systems

Table 1

Description of the final preprocessed variables.

Variable	Class
Habits-parafunctions	Categorical 2 values
General pathology	Binary
Total current treatments	Binary
Allergy	Binary
Sessions	Discrete
Mechanical/manual instrumentation	Binary
Lateral or vertical	Binary
Anesthetic	Categorical 3 values
Clamps	Categorical 4 values
Ranking difficulty level	Categorical 3 values
Student course	Discrete 4 values
Tooth position	Categorical 3 values
Anatomical characteristics of the crown	Categorical 3 values
Root anatomy	Categorical 3 values
Anomalies	Binary
Type of restoration: Perno	Binary
Perno	Binary
Type	Binary
Diámetro diameter	Categorical 5 values
Length	Categorical 3 values
Time endodontics-restoration	Categorical 4 values
Type of pain	Categorical 4 values
Inflammation	Binary
Fistula	Binary
Number of roots	Discrete 3 values
Number of tubes	Discrete 4 values
Root morphology	Binary
Curvatures	Binary
Degree	Categorical 3 values
Bone level	Categorical 3 values
Stable occlusion	Categorical 3 values
Fracture type	Categorical 2 values
Location	Categorical 5 values
Signs of fissure/fracture	Binary
Probing	Binary
Movility	Binary
visible crack	Binary
Level	Binary
Time to failure	Categorical 4 values
Retreatments	Binary
Percha solvent	Binary
Use of rotary	Binary
Failures in retreatment	Binary