The question of whether it is better to treat maxillary incisors with or without dowel or ferrule is a complex one that depends on various factors. Several studies have investigated the effects of ferrule and dowel on the fracture resistance of endodontically treated maxillary incisors.

One study found that endodontically treated maxillary incisors with a uniform 2 mm ferrule were more fracture-resistant than those with a uniform 1 mm ferrule [3].

Another study investigated the effects of using different diameters of parallel cast posts with or without ferrule on the overall fracture resistance of Cast Post and Core (CPC) and found that the use of a ferrule increased the fracture resistance of the CPC [1].

However, other studies have found that the presence of a ferrule did not significantly affect the fracture resistance of endodontically treated maxillary incisors [2][5].

The use of dowels and cores can also affect the fracture resistance of endodontically treated maxillary incisors. One study compared the fracture resistance of endodontically treated central maxillary incisors prepared with different types of dowel and core materials and found that the use of glass fiber dowels resulted in the highest fracture resistance [6].

Another study investigated the effect of a cervical cavity extending 1 mm apical to the cemento-enamel junction (CEJ) on fracture resistance and failure mode of maxillary central incisors that have been treated endodontically, present with complete and incomplete ferrules, and are restored with and without a fiber post [4].

In conclusion, the decision to treat maxillary incisors with or without dowel or ferrule depends on various factors, including the extent of tooth structure loss, the presence of a cervical cavity, and the type of dowel and core material used. It is important to consider each case individually and to use evidence-based techniques to ensure the best possible outcome.

REFERENCES

[1] (2019). Effects of Ferrule and Diameter of Parallel Cast Post and Core on Fracture Resistance. BDS, 4(22), 538-545. https://doi.org/10.14295/bds.2019.v22i4.1720 [2] (2017).

The influence of crown ferrule on fracture resistance of endodontically treated maxillary central incisors. Balkan J Dent Med, 3(21), 44-49. https://doi.org/10.1515/bjdm-2017-0006 [3] (2014).

Fracture resistance of endodontically treated maxillary central incisors with varying ferrule heights and configurations: In vitro study. J Conserv Dent, 2(17), 115. https://doi.org/10.4103/0972-0707.128038 [4] (2021).

Effect of Cervical Lesions on Fracture Resistance and Failure Mode of Maxillary Central Incisors Restored with Fiber Posts and Complete Crowns. Operative Dentistry, 6(46), 669-679. https://doi.org/10.2341/20-164-l [5] (2008).

The finite element analysis of the effect of ferrule height on stress distribution at post-and-core-restored all-ceramic anterior crowns. Clin Oral Invest, 2(13), 223-227. https://doi.org/10.1007/s00784-008-0217-5 [6] (2019).

Evaluation of Fracture Resistance and Sites of Failure of Different Dowel Core Restorations: An In-Vitro Study. TODENTJ, 1(13), 454-461. https://doi.org/10.2174/1874210601913010454