Retrospective Study Comparing Clinical Outcomes of Fixed Dental Prostheses in Matched Groups of Bruxer and Nonbruxer Patients
Table 1
Descriptive characteristics of the matched groups and comparison of the prosthesis failure rates between bruxers and nonbruxers.
Bruxers
Nonbruxers
value
FDP (N)
62
62
Sex (number of FDP)
Woman (44)
Woman (44)
Man (18)
Man (18)
Prosthetic units (number of FDP)
3 (40), 4 (16), 5 (4), 6 (2)
3 (40), 4 (16), 5 (4), 6 (2)
Patients’ age† (years), mean ± SD (min-max)
57.8 ± 11.7 (31.9–81.5)
58.3 ± 11.1 (37.7–84.3)
0.729††
Follow-up (months), mean ± SD (min-max)
110.1 ± 66.6 (15.3–262.1)
106.5 ± 66.7 (6.0–259.3)
0.767‡‡
Smoking (number of FDP)‡
0.743§§
No
20
13
Current + former smokers
15
17
FDP failure, N (%)
20 (32.3)
16 (25.8)
0.001§§
Sex, N/total (%)
Woman
12/44 (27.3)
10/44 (22.7)
0.002§§
Man
8/18 (44.4)
6/18 (33.3)
0.503§§
Smoking, N/total (%)‡
No
5/20 (25.0)
4/13 (30.8)
0.019§§
Current + former smokers
6/15 (40.0)
7/17 (41.2)
0.804§§
Prosthesis location, N/total (%)
Maxilla
12/37 (32.4)
6/39 (15.4)
0.002§§
Mandible
8/25 (32.0)
10/23 (43.5)
0.383§§
Area of placement, N/total (%)
Anterior
3/8 (37.5)
1/8 (12.5)
0.219§§
Posterior
15/38 (39.5)
10/31 (32.3)
0.035§§
Anterior/posterior
2/16 (12.5)
5/23 (21.7)
0.064§§
Abutments, N/total (%)
All abutments vital
6/31 (19.4)
6/41 (14.6)
0.001§§
Vital and nonvital abutments
13/27 (48.1)
10/20 (50.0)
0.541§§
All abutments nonvital
1/4 (25.0)
0/1 (0)
0.250§§
FDPs with post and core in nonvital abutments, N/total (%)§
No
3/12 (25.0)
6/11 (54.5)
0.727§§
Yes
11/19 (57.9)
4/10 (40.0)
0.332§§
Position nonvital abutment, N/total (%)
Mesial
9/14 (64.3)
2/6 (33.3)
0.267§§
Distal
2/10 (20.0)
7/12 (58.3)
0.453§§
Mesial and distal
2/5 (40.0)
0/2 (0)
1.000§§
Middle
1/2 (50.0)
1/1 (100)
1.000§§
Material, N/total (%)¶
Gold ceramic
16/38 (42.1)
7/38 (18.4)
0.040§§
CoCr ceramic
4/16 (25.0)
8/18 (44.4)
0.180§§
Treatment provider, N/total (%)
Dental student
15/45 (33.3)
10/51 (19.6)
0.001§§
General or specialist dentist
5/17 (29.4)
6/11 (54.5)
1.000§§
FDPs with at least one complication (N)
27
22
0.111§§
Complications (N)
Technical
<0.001§§
Major chipping
3
0
Loss of retention
8
6
Prosthesis replacement
7
3
Tooth fracture
2
1
Biological
<0.001§§
Loss of tooth vitality
7
8
Recurrent caries
12
7
Periapical destruction
2
1
Technical/biological
<0.001§§
Tooth loss
8
5
FDP, fixed dental prosthesis. †On the day of prosthesis delivery. ‡Information not available for all patients. §Only for the prostheses that had at least one nonvital abutment tooth. ¶Analysis done only for the most prevalent materials used. ††Wilcoxon signed rank test. ‡‡Paired-samples t-test. §§McNemar’s test.
