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Er:YAG Laser and Fractured Incisor Restorations: An In Vitro Study.

C Fornaini¹, S Petruzzella, R Podda

¹Oral Medicine and Laser-Assisted Surgery Unit, Dental School, Faculty of Medicine, University of Parma, Via Gramsci 14, 43126 Parma, Italy ; Laser Unit, Dental Sciences Department, Faculty of Medicine, University of Liège, Quai Godefroid Kurth, 45, 4020 Liège, Belgium.

International Journal of Dentistry

|October 24, 2012

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The Er:YAG laser shows promise for reattaching fractured teeth, offering superior marginal seal compared to traditional acid etching. This dental laser application enhances tooth restoration after coronal fractures.

Area of Science:

Dentistry
Biomaterials Science
Laser Technology

Background:

Dental restorations for fractured teeth often involve reattaching the natural fragment.
Traditional methods like acid etching have limitations in achieving optimal marginal seal.

Purpose of the Study:

To analyze the effects of Er:YAG laser on enamel and dentine for fractured tooth restoration.
To compare the efficacy of Er:YAG laser versus orthophosphoric acid in fragment reattachment.

Main Methods:

Fractured bovine incisors were reattached using Er:YAG laser, orthophosphoric acid, or a combination.
Detachment resistance was tested using a dynamometer.
Marginal seal was evaluated via microinfiltration with methylene blue and optical microscopy.

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Main Results:

While detachment force showed no significant difference, the Er:YAG laser groups exhibited significantly better marginal seal.
Etching with Er:YAG laser, alone or combined with acid, outperformed acid etching alone in preventing microinfiltration.

Conclusions:

Er:YAG laser treatment provides a superior marginal seal for reattached tooth fragments compared to orthophosphoric acid.
This in vitro study supports the use of Er:YAG laser in dental traumatology for restoring fractured anterior teeth.