Mathematical Methods for Assessing the Prognostic of Fixed Partial Dentures Resulting from Evaluating a Group of Dental Patients in Romania

Table 1

Results reported in articles on FPR failure with similar including criteria [6].

Number	Cause	Number of abutment teeth in the study/number of affected abutment teeth	Mean incidence
1	Dental and root caries	3360/602 abutment teeth	18% of the abutment teeth
		1354/113 FPR	8% of the FPR
2	Endodontic treatment needed	2514/276 abutment teeth	11% of the abutment teeth
		1358/88 FPR	7% of the FPR
3	Decementing	1906/137 FPR	7% of the FPR
4	Aesthetic failure	1024/58 FPR	6%
5	Periodontal failure of the abutments	1440/62 FPR	4%
6	Fracture of abutments	1602/44 FPR	3%
7	Fracture of the bridge	1192/24 FPR	2%
8	Fracture of ceramic layer of metal-ceramic FPR	768/17 FPR	2%