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A Journal on Surgery

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Chirurgia 2010 April;23(2):25-30


language: English

Scanning electron microscopy analysis of surfaces after apicoectomy resection with burs and lasers

Gerhardt De Oliveira M. 1, Rockenbach Binz M. C. 1, Wehmeyer Fregapani P. 1, Da Cunha Filho J. J. 2, Puricelli E. 2

1 School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS. Porto Alegre, RS, Brazil; 2 School of Dentistry, Universidade Federal do Rio Grande, do Sul, UFRGS. Porto Alegre, RS, Brazil


AIM: The aim of this study was to evaluate the effects of Er:YAG and Nd:YAG lasers on the cementum-dentin morphology in the root apex of 80 permanent single-rooted human teeth. The morphologic changes produced by the use of the Puricelli technique for apicoectomy were compared with techniques that use Er:YAG and Nd:YAG laser in combination and independently.
METHODS: Thus, we analyzed the permanent single-rooted human teeth divided in 4 groups of 20 under scanning electron microscopy (SEM). The following groups were evaluated: Group I: Er:YAG; Group II: Er:YAG + Nd:YAG; Group III: Puricelli technique and Group IV: Puricelli technique + Nd:YAG. The resected surfaces of the apical ends were examined to detect craters, irregularities, carbonized areas, debris, smear layer, fusion, recrystallization, and dentinal tubule sealing. Then, the specimens received scores according to smoothness and roughness. The images of specimens using SEM confirmed that Er:YAG achieved tissue ablation and is capable of removing the smear layer produced, when teeth were cut with burs, without carbonization.
RESULTS: The results of this in vitro study showed that Puricelli technique, which consists in the use of a sequence of burs for apicoectomy, produced smoother and more regular and homogeneous surfaces.
CONCLUSION: The Puricelli techniques presented best results than the other techniques under this study.

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