Fracture behavior of root-amputated teeth at different amount of periodontal support - a preliminary in vitro study

Szabo, Balazs [Szabó, Balázs (Esztétikai fogász...), author] Department of Periodontology (USZ); Garoushi, Sufyan; Braunitzer, Gabor [Braunitzer, Gábor (orvostudomány, id...), author]; Szabo, Balazs P. [Szabó, P. Balázs (Agrár), author] Food Engineering Department (USZ / FE); Barath, Zoltan [Baráth, Zoltán Lajos (fogpótlástan, fog...), author] Department of Prosthodontics (USZ); Frater, Mark ✉ [Fráter, Márk Tibor (konzerváló fogászat), author] Department of Cosmetic and Conservative Dentistry (USZ)

English Scientific Article (Journal Article)
Published: BMC ORAL HEALTH 1472-6831 19 (1) Paper: 261 , 10 p. 2019
  • SJR Scopus - Dentistry (miscellaneous): Q1
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    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.
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    2020-09-24 04:44