The vibratory characteristics of obturators with different bulb height and form designs

Oki, Meiko; Iida, Toshiaki; Mukohyama, Hitoshi; Tomizuka, Ken; Takato, T.; Taniguchi, Hisashi

doi:10.1111/j.1365-2842.2006.01528.x

Cited by 12 publications

(19 citation statements)

References 14 publications

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“…Furthermore, the most frequent maxillary defect is Aramany class 1, as in the present case. In these cases, a large unilateral maxillary defect involving removal of the teeth on one side of the arch subjects the abutment teeth on the opposite side to rotational and dislodging forces exerted by the obturator . Therefore, in addition to drooping of the flap, it is considered that this mechanism leads to clasp fracture and nasal regurgitation with conventional obturator prostheses.…”

Section: Discussionmentioning

confidence: 99%

Fabrication of a Movable Obturator Following Maxillary Reconstruction with Slit‐Shaped Fenestration

Murakami

Nishi

Umezono³

et al. 2014

Journal of Prosthodontics

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Extensive maxillary resection has generally been reconstructed with free skin flaps. Because drooping of the transferred flap causes instability of the obturator prosthesis, maxillary reconstruction often incorporates a slit-shaped oronasal fenestration. Although obturator prostheses for edentulous patients are stabilized with the help of oronasal slits, those for dentate patients are unstable because of flap mobility, resulting in a harmful lateral force exerted on the abutment teeth, causing dislodging of the denture. This report evaluates the benefits of a movable obturator prosthesis for a 60-year-old dentulous patient with maxillary sinus carcinoma. The patient underwent left-sided total maxillectomy, and the defect was reconstructed with a slit-shaped fenestration using a rectus abdominis flap. A conventional obturator prosthesis was inserted; however, drooping of the flap caused instability of the obturator, resulting in nasal regurgitation and fracture of the clasp. To solve this problem, we designed an obturator prosthesis with a movable connection consisting of a ball attachment (patrix) in the metal base and a socket (matrix) in the obturator, which acted as a stress breaker against the harmful force exerted by the flap. Application of this movable obturator prosthesis was a useful solution for a compromising situation created by the surgical procedure. No clinical disorders were observed at the 3-year follow-up.

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Section: Discussionmentioning

confidence: 99%

Fabrication of a Movable Obturator Following Maxillary Reconstruction with Slit‐Shaped Fenestration

Murakami

Nishi

Umezono³

et al. 2014

Journal of Prosthodontics

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“…The denture component of the obturator allows mastication of soft foods initially and harder foods several days later [3]. Speech is minimally altered and in many instances remains nearly unchanged [7,8]. Exploration of the defect by the tongue is prevented, and the patient remains unaware of the dimensions of the surgery.…”

Section: Discussionmentioning

confidence: 99%

Influence of immediate and permanent obturators on facial contours: a case series

et al. 2009

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IntroductionRehabilitation of patients after surgical removal of carcinomas in facial skeleton is one of the most difficult therapies of the stomatognathic system. Significant deformation of tissues, dysfunctions of the stomatognathic system with concurrent biological imbalance of the oral cavity environment frequently affect the treatment to become arduous. Scars and contraction of the oral crevice may cause serious psychological deficiencies that are another aspect of the treatment schedule.Case presentationThree Turkish patients ages 46 (male), 61 (male) and 24 (female) who experienced similar operations were rehabilitated with maxillary obturators. The situations was ideal for patient no 1. Patient no 2 could not receive an immediate obturator and patient no 3 rejected using permanent obturator. The paper describes the advantages of a surgical obturator which is constructed before operation and inserted immediately following partial maxillectomy and expresses long term complications when neglecting the use of definite obturator prosthesis, in the light of three cases.ConclusionThe primary objective of oral-maxillofacial and plastic surgeons and prosthodontists when treating tumors is to eliminate disease and to improve the quality of life including the facial contours which influences the psychological condition of patient. Neglecting immediate obturator construction may cause serious facial appearance problems due to soft tissue contracture. When permanent obturator is rejected, serious contracture of soft tissues and facial disharmony is inevitable.

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“…O desenvolvimento de forças de alavanca e linhas de fulcro aumenta drasticamente as forças sobre os tecidos de suporte durante a mastigação 16,23 . O efeito do peso intrínseco da prótese obturadora maxilar sobre os tecidos de suporte representa um fator agravante 25 , o que torna fundamental a adequada avaliação dos tecidos remanescentes para o bom desempenho da prótese e preservação das estruturas anatômicas de retenção e suporte 26 .…”

Section: Figura 3 Comparação Entre Os Grupos Experimentais Ao Longo unclassified

Sistemas de Retenção em Prótese Obturadora Cirúrgica Para Pacientes Maxilectomizados

Miyashita¹,

Mattos²,

Marafon³

2011

Pesqui. bras. odontopediatria clín. integr.

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Objetivo: Avaliar sistemas de retenção a grampo em próteses obturadoras cirúrgicas em diferentes ressecções maxilares. Método: Diferentes modelos maxilares, confeccionados em resina acrílica ativada quimicamente (RAAQ), receberam próteses obturadoras cirúrgicas, sendo a amostra constituída pelos grupos: Grupo 1 -grampo circunferencial (grampo C) no 1º e no 2º molares superiores do lado oposto à ressecção e arco labial de Hawley (G1a -Classe II de Aramany, G1b -Classe II de Aramany sem canino superior e G1c -Classe I de Aramany); Grupo 2 -grampo C no 1º e no 2º pré-molar e no 1º e 2º molar (G2 -Classe I de Aramany). A ciclagem mecânica ocorreu com intervalos de 0, 28, 120, e 360 ciclos de inserção e remoção, considerando-se quatro remoções diárias por um período de três meses; testes de resistência à tração foram realizados no início e após cada intervalo da ciclagem mecânica. Resultados: Todos os grupos apresentaram diminuição da retenção ao longo da ciclagem. O grupo G2 se manteve superior em todos os momentos avaliados, seguido em ordem decrescente pelos grupos G1a, G1b e G1c. A redução da retenção nos grupos 1a, 1b e 1c não foi estatisticamente significante até o ciclo 120. O grupo G2 apresentou redução significante da retenção no ciclo 28, não significante no ciclo 120, mas significante no ciclo 360. Conclusão: A substituição do arco de Hawley por grampos circunferencias nos pré-molares proporciona maior retenção. A retenção proporcionada pelo sistema com arco labial de Hawley é dependente da amplitude da perda, onde quanto maior a perda menor a retenção; a expressiva perda de retenção após o período de 1 mês sugere a necessidade de ativação periódica dos sistemas de retenção.Neoplasias bucais; Prótese maxilofacial; Resistência à tração.Objective: To evaluate clasp retention systems in surgical obturator prostheses after different maxillary resections. Method: Different chemically activated acrylic resin maxillary models received surgical obturator prostheses, in a sample constituted by the following groups: Group 1 -circumferential clasp (C clasp) in the first and second maxillary molars contralateral to the resection and Hawley labial bow (G1a -Aramany Class II, G1b -Aramany Class II without maxillary canine and G1c -Aramany Class I); Group 2 -C clasp in the first and second premolar and in the first and second molar (G2 -Aramany Class I). Mechanical cycling was performed at intervals of 0, 28, 120 and 360 insertion/removal cycles, considering four daily removals during a 3-month period. Tensile strength tests were performed in the beginning and at each interval of the mechanical cycling. Results: All groups presented a decrease of retention along the cycling period. The group G2 was superior to the others at all evaluated moments, followed by the groups G1a, G1b and G1c in a decreasing order. The decrease of the retention in the groups G1a, G1b and G1c was not statistically significant up to cycle 120. Group G2 presented a significant reduction of retention at cycle 28, non-significant at cycle 120 and si...

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The vibratory characteristics of obturators with different bulb height and form designs

Cited by 12 publications

References 14 publications

Fabrication of a Movable Obturator Following Maxillary Reconstruction with Slit‐Shaped Fenestration

Fabrication of a Movable Obturator Following Maxillary Reconstruction with Slit‐Shaped Fenestration

Influence of immediate and permanent obturators on facial contours: a case series

Sistemas de Retenção em Prótese Obturadora Cirúrgica Para Pacientes Maxilectomizados

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