TY  - JOUR
AU  - Szabó, Balázs
AU  - Garoushi, Sufyan
AU  - Braunitzer, Gábor
AU  - Szabó, P. Balázs
AU  - Baráth, Zoltán Lajos
AU  - Fráter, Márk Tibor
TI  - Fracture behavior of root-amputated teeth at different amount of periodontal support - a preliminary in vitro study
JF  - BMC ORAL HEALTH
J2  - BMC ORAL HEALTH
VL  - 19
PY  - 2019
IS  - 1
PG  - 10
SN  - 1472-6831
DO  - 10.1186/s12903-019-0958-3
UR  - https://m2.mtmt.hu/api/publication/30992962
ID  - 30992962
N1  - Export Date: 27 January 2020            
            Correspondence Address: Fráter, M.; Department of Operative and Esthetic Dentistry Faculty of Dentistry, University of Szeged, Tisza Lajos Krt., 64-66, Hungary; email: frater.mark@stoma.szote.u-szeged.hu
Export Date: 5 February 2020            
            Correspondence Address: Fráter, M.; Department of Operative and Esthetic Dentistry Faculty of Dentistry, University of Szeged, Tisza Lajos Krt., 64-66, Hungary; email: frater.mark@stoma.szote.u-szeged.hu
Export Date: 2 March 2020            
            Correspondence Address: Fráter, M.; Department of Operative and Esthetic Dentistry Faculty of Dentistry, University of Szeged, Tisza Lajos Krt., 64-66, Hungary; email: frater.mark@stoma.szote.u-szeged.hu
AB  - Background The purpose of this study was to evaluate the effect of the amount of periodontal support on the fracture resistance of root-amputated maxillary molar teeth restored with either direct class. I. restorations or class II. mesio-occluso-distal (MOD) indirect overlay restorations with cuspal coverage. Methods Sixty sound maxillary first molars were collected and randomly divided into four groups. In Groups 1 and 2, MOD cavities were prepared and all cusps were reduced by 2 mm, whereas in Group 3 and 4, only a conservative Class I. cavity was prepared. Subsequently, root canal treatment was performed and the mesio-buccal roots were amputated. Groups 1 and 2 were restored with indirect composite overlay, while Groups 3 and 4 received direct composite fillings. After restoration, teeth were embedded as follows: Groups 1 and 3: normal bone level, Groups 2 and 4: furcation involvement. The specimens were submitted to static fracture resistance testing. Fracture thresholds and fracture patterns were measured and evaluated. Results Group 1 had the highest fracture resistance (2311,6 N) among the restored groups and showed statistically significant difference compared to Group 2 (p = 0.038) and Group 4 (p = 0.011). There was no statistically significant difference in terms of fracture resistance between the rest of the groups. In terms of the fracture patterns, Group 3 was characterized by the highest percentage (60%) of mostly favorable fractures, while the rest of the groups showed predominantly unfavorable ones. Conclusions The amount of periodontal support seems to influence the fracture resistance of root-amputated and restored maxillary molars.
LA  - English
DB  - MTMT
ER  -