Comparative study of four retentive anchor systems for implant supported overdentures – retention force changes

Bayer, Stefan; Steinheuser, Daniela; Grüner, Manfred; Keilig, Ludger; Enkling, Norbert; Stark, Helmut; Mues, Sebastian

doi:10.1111/j.1741-2358.2009.00286.x

Cited by 39 publications

(54 citation statements)

References 9 publications

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“…Furthermore, it is still debatable which type of material is less subjective to wear and allows maintaining constant retention of prosthesis. Few studies have investigated retentive force changes of resilient attachments during fatigue simulation [23][24][25] . However, there is little known about the relationship between retention loss, dimensional changes and surface wear patterns of these attachments 26) .…”

Section: Introductionmentioning

confidence: 99%

Wear simulation effects on overdenture stud attachments

Rutkūnas

Mizutani

Takahashi

et al. 2011

Dental Materials Journal

129

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The aim of this study was to evaluate wear effects on overdenture resilient attachments. Six commercially available attachments were investigated: ERA orange and white (EO and EW), Locator pink, white and blue (LRP, LRW and LRB) and OP anchor (OP). Five specimens were used for wear simulation while other two specimens served as controls. Fifteen thousands insertion-removal cycles were simulated. Dimensional changes and surface characteristics were evaluated using light microscopy and SEM, respectively. Sudden decrease of retentive force was characteristic for EO and EW attachments. Retentive force of Locator attachments fluctuated throughout the wear simulation period. Dimensional changes and surface wear was more expressed on plastic cores than on plastic rings of attachment males. Based on SEM analysis, some of the specimens obtained smoother surface after wear simulation. Mechanism of retention loss of resilient overdenture attachments can be only partially explained by dimensional changes and surface alterations.

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Section: Introductionmentioning

confidence: 99%

Wear simulation effects on overdenture stud attachments

Rutkūnas

Mizutani

Takahashi

et al. 2011

Dental Materials Journal

129

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“…The decrease was statistically significant. A retention force decrease was also documented by different in vitro studies of retentive elements [3,15,29]. For the clinically found retention force decrease of telescopic crowns, there are only a few data.…”

Section: Analysis Of the Resultsmentioning

confidence: 86%

“…For the purpose of oral rehabilitation of the partially edentulous dentition, different attachment systems can be used for the retention of combined fixed-partial dentures [1][2][3][4][5]. Telescopic crowns [6][7][8][9] as well as conical crowns [6,[10][11][12] are universally established and widely spread for this indication.…”

Section: Introductionmentioning

confidence: 99%

Clinical retention force development of double crowns

Bayer

Stark²,

Gölz

et al. 2011

Clin Oral Invest

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This study deals with the development of the retentive forces of double crowns intraorally measured. Twenty-five combined fixed-removable prostheses with a total of 84 double crowns were included in the study. The intraoral measurement was performed at 72 defined measuring points directly adjacent to the double crowns of the dentures. The measurement was performed 4-6 weeks (baseline), 6 months (recall 1), and 18 months (recall 2) after the insertion of the restoration. A specifically designed measuring device was used. The median values for the single measuring points reached 4.705 N at the baseline, 5.190 N after 6 months, and 3.740 N after 18 months. The measured values were analyzed according to differences between the median retention forces at the three defined points in time. The statistical analysis of the median values showed no statistical difference for the retention force change after 6 months but for the decrease until the second recall (Mann-Whitney test). The retention force per denture was calculated by a summation of the single measuring points. At the baseline, 12.9 N was reached. The forces did only decrease slightly and were not statistically significant. The results indicate that retention force values of double crowns, measured intraorally at the patient, do not relevantly change clinically within the first 1.5 years. Within the limitations of this study, it can be stated that wear does not influence the retentive forces of double crowns within the first 18 months. After this period the retention force should be still sufficient for denture retention.

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“…Os enxaguatórios C e L propiciaram médias similares (10,41 e 10,09, respectivamente) à AD (10,91). O CF propiciou resistência similar (9,14) aos enxaguatórios C e L. No C e no HS a retenção diminuiu significativamente a partir de 30 dias. No L e no CF, a diminuição da retenção ocorreu após 60 dias.…”

Section: à Minha Orientadora Profa Dra Valéria Oliveira Pagnano Deunclassified

Avaliação da força de retenção de encaixes o'ring submetidos a soluções de higienização diárias

Felipucci¹

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Dentários e Prótese, pela formação, pelos padrões de exigência e excelência.Tenho muito orgulho em carregar a bandeira forpiana a cada lugar que eu vá.A todos os Mestres que passaram por minha formação acadêmica e de docência pelos conhecimentos compartilhados e pelos exemplos a serem seguidos, de paixão e dedicação à carreira. Soluções auxiliares para higienização de próteses têm sido indicadas como método efetivo no controle de biofilme. Desta forma, este estudo teve por objetivo avaliar se as soluções (Cepacol/C, Cepacol Flúor/CF, Listerine/L, hipoclorito de sódio 0,05%/HS e água deionizada/AD, como controle) potencializam a perda de retenção do o'ring (Conexão Sistemas de Prótese Ltda). Foi obtida uma base de teflon com dois análogos e pilares o'ring e contra-bases, compostas pelas cápsulas metálicas e anéis, foram confeccionadas e divididas em grupos (n=6). Foram simulados 90 dias de imersão overnight, sendo obtido o valor da resistência à tração a cada 30 dias, utilizando a máquina de ensaios mecânicos (Material Testing System -MTS 810), totalizando 4 leituras (T0, T1, T2 e T3). Foi realizada análise qualitativa por meio de microscopia eletrônica de varredura em um espécime de cada grupo. Os dados da força de retenção (N) foram analisados estatisticamente pelos testes ANOVA e Bonferroni (α=0,05). Os resultados demonstraram que a retenção diminuiu significativamente com o tempo (P=0,0001) e com o uso das soluções (P=0,0000) e houve interação entre os fatores de variação (P=0,0245). A retenção no T0 (11,25) foi maior que no T1 (9,63), T2 (8,76) e T3 (8,40). No T1 foi maior que nos demais tempos e entre T2 e T3 não houve diferença significante. Entre as soluções avaliadas, o HS causou a maior redução da força de retenção (7,00). Os enxaguatórios C e L propiciaram médias similares (10,41 e 10,09, respectivamente) à AD (10,91). O CF propiciou resistência similar (9,14) aos enxaguatórios C e L. No C e no HS a retenção diminuiu significativamente a partir de 30 dias. No L e no CF, a diminuição da retenção ocorreu após 60 dias. Na AD, a retenção se manteve pelo período de 90 dias. Após 90 dias, o C propiciou retenção similar à água deionizada. As eletromicrografias apontaram alteração dos anéis: no do grupo do HS, houve presença de solução de continuidade do material e no do CF, formação de uma película com precipitados cristalinos. Conclui-se que após 3 meses de imersão, os valores obtidos em todas as soluções se apresentaram acima do mínimo indicado para a retenção (5 N), entretanto as soluções de hipoclorito de sódio 0,05% e Cepacol Flúor devem ser evitadas devido aos efeitos deletérios causados no material.Palavras-chave: Higienizadores de Dentadura, Overdentures, Encaixe de Precisão de Dentadura. Denture cleansers have been widely indicated as an effective auxiliary method to biofilm control. The aim of this study was to evaluate the effect of these solutions Cepacol/C, Cepacol Fluor/CF, Listerine/L, 0,05% sodium hypochlorite/SH and deionized water /DA -control) on the retention loss of overdentures nytril o´...

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Comparative study of four retentive anchor systems for implant supported overdentures – retention force changes

Abstract: Attachment systems which possess a male and female component of different material composition are preferable. They show smaller changes in the retention force. For retention force increase and wear compensation, an attachment system should be adjustable.

Cited by 39 publications

References 9 publications

Wear simulation effects on overdenture stud attachments

Wear simulation effects on overdenture stud attachments

Clinical retention force development of double crowns

Avaliação da força de retenção de encaixes o'ring submetidos a soluções de higienização diárias

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