Revista de Odontologia da UNESP
https://revodontolunesp.com.br/article/doi/10.1590/1807-2577.20260017
Revista de Odontologia da UNESP
Artigo Original

Comparative evaluation of Dual Gracey™ curettes and sonic instruments for deposit removal in molar furcations: an in vitro study

Avaliação comparativa de curetas dual Gracey™ e instrumentos sônicos para a remoção de depósitos em furcas molares: um estudo in vitro

Felipe BITTARELLO; Milena de Moura GIRARDELLO; Ana Laura Rosa SANTOS; Maria Cecília ANICIO; Fábio André dos SANTOS

http://dx.doi.org/10.1590/1807-2577.20260017 Rev. odontol. UNESP, vol.55, e20260017, 2026
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Abstract

Introduction: The anatomical complexity of molar furcations challenges root deposit removal and may influence the effectiveness of periodontal instrumentation.

Objective: To evaluate the removal of simulated deposits in molar furcations using Dual Gracey™ curettes and sonic instruments.

Material and method: Sixteen molars (80 tooth surfaces) were divided into maxillary (n=8) and mandibular (n=8) molars based on furcation width. Orthodontic wires were inserted into the furcation entrance and divided into two categories: narrow (wire from 0.4–0.6 mm) and wide (wire ≥0.7 mm) furcations. A composite mixture of cyanoacrylate, plaster, and graphite powder was used to simulate the root surface deposits. The molars were mounted on manikins with rubber artificial gingiva to simulate the clinical conditions of ergonomic work. They were randomized according to the periodontal instrument (Dual Gracey™ curettes or sonic instrument), furcation width, dental arch, and side. Planimetric analysis was performed on the buccal, lingual, mesial, distal, and furcation roof surfaces. Statistical analysis was performed using two-way ANOVA, followed by Tukey’s post-hoc test.

Result: The percentage of residual deposits differed significantly (p = 0.011) between the instruments, being higher for the curettes (44 ± 16) than sonic instrument (34 ± 11). The furcation roof showed a higher percentage (71 ± 20) than the other dental surfaces: buccal (27 ± 15), lingual (37 ± 19), mesial (41 ± 20), and distal (41 ± 24). Furcation width and arch position did not affect the instrumentation effectiveness; however, a significant difference was observed between the sides of the dental arches.

Conclusion: Sonic instruments were more effective in removing root surface deposits from the furcation region. Furthermore, the furcation roof showed the highest percentage of residual deposits.

Keywords

Dental scaling; periodontal debridement; molar; furcation defects; dental instruments; dental models

Resumo

Resumo: Introdução: A complexidade anatômica das furcas dos molares dificulta a remoção de depósitos radiculares e pode influenciar a eficácia da instrumentação periodontal.

Objetivo: Avaliar a remoção de depósitos simulados em furcas de molares utilizando curetas Dual Gracey™ e instrumentos sônicos.

Material e método: Este estudo incluiu 16 molares (80 superfícies), divididos em maxilares (n=8) e mandibulares (n=8). Fios ortodônticos foram inseridos na entrada da furca, sendo divididas em: furcas estreitas (fio de 0,4–0,6 mm) e largas (fio ≥0,7 mm). Uma mistura composta de cianoacrilato, gesso e pó de grafite foi utilizada para simular depósitos radiculares. Os molares foram montados em manequins com gengiva artificial de borracha para simular as condições clínicas de trabalho. Eles foram randomizados de acordo com o instrumento periodontal (cureta dual Gracey™ ou instrumento sônico), largura da furca, arcada dentária e lado. A análise planimétrica foi realizada nas superfícies: vestibular, lingual, mesial, distal e do teto da furca. A análise estatística foi realizada utilizando ANOVA de duas vias e pós-teste de Tukey.

Resultado: A porcentagem de depósitos residuais diferiu significativamente (p = 0,011) entre os instrumentos, sendo maior na cureta (44 ± 16) do que no instrumento sônico (34 ± 11). O teto da furca apresentou uma maior porcentagem (71 ± 20) do que as outras superfícies dentárias: vestitular (27 ± 15), lingual (37 ± 19), mesial (41 ± 20) e distal (41 ± 24). A largura da furca e a posição da arcada não afetaram a eficácia da instrumentação; no entanto, observou-se uma diferença significativa entre os lados da arcada dentária.

Conclusão: Os instrumentos sônicos foram mais eficazes na remoção de depósitos da superfície radicular na região da furca. Além disso, a parte superior da furca apresentou a maior porcentagem de depósitos residuais.
 

Palavras-chave

Raspagem dentária; desbridamento periodontal; molar; defeitos da furca; instrumentos odontológicos; modelos dentários

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Submetido em:
17/04/2026

Aceito em:
13/05/2026

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