Indian Journal of Forensic Medicine & Toxicology
  • Year: 2019
  • Volume: 13
  • Issue: 2

Influence of Varying Ferrule Heights and Configurations on the Fracture Resistance of Endodontically Treated Mandibular First Molars-An in Vitro Study

  • Author:
  • Shriya Marya1, Thilak Shetty2, Shobha J Rodrigues3,, Sharon Saldanha4, Umesh Pai4, Mahesh Mundathaje4, Puneeth Hegde4
  • Total Page Count: 6
  • Page Number: 203 to 208

1Former Postgraduate Student, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, India

2Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, India

3Professor & Head, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, India

4Associate Professor, Department of Prosthodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, India

*Corresponding author, Dr Shobha J Rodrigues, Professor & Head, Department of Prosthodontics, Manipal College of Dental Sciences, Lighthouse Hill Road, Mangalore-575001, India. Email: shobhaj@manipal.edu, Telephone: 0091 8242425886, 09448100464, Fax: 0824 4250521

Online published on 7 May, 2019.

Abstract

To evaluate the influence of varying ferrule heights and configurations on the fracture resistance of endodontically treated teeth restored with custom cast post and cores and full metal crowns.

Fifty extracted human mandibular first premolars were randomly divided into 5 groups: I, no root canal treatment (RCT), crown; II, no post and core, crown; III, 2-mm ferrule, cast post and core and crown; IV, non-uniform ferrule (2 mm buccal and lingual, 0.5 mm proximal), cast post and core and crown; and V, no ferrule, cast post and core and crown. Samples were subjected to a static load on the buccal cusp, 150° to the long axis of the tooth, and failure load was recorded. Statistical analysis was carried out with a 1-way analysis of variance and the Bonferroni pairwise comparison. The mode of fracture was noted by visual inspection.

Absence of ferrule resulted in significantly lower fracture resistance (V: 308.27 +/-75.567 N) as compared to all other groups. Group I: 714.69 +/-89.37 N, and Group II: 656.90 +/-133.15 N were significantly more resistant as compared to Group IV: 471.98 +/-115.99 N (p < 0.01). However, there was no significant difference between non-uniform ferrule and the uniform 2-mm vertical ferrule.

The premolars with a ferrule were more fracture resistant as compared to the teeth with no ferrule preparation.

Keywords

Ferrule, endodontics, fracture resistance