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Amalia Moreno - One of the best experts on this subject based on the ideXlab platform.

  • stress analysis in Oral ObturatOr prOstheses part ii phOtOelastic imaging
    Journal of Biomedical Optics, 2014
    Co-Authors: Aldieris Alves Pesqueira, Marcelo Coelho Goiato, Marcela Filie Haddad, Amalia Moreno, Emily Vivianne Freitas Da Silva, Abbas Zahoui, Daniela Micheline Dos Santos
    Abstract:

    In part I Of the study, twO attachment systems [O-ring; bar-clip (BC)] were used, and the system with three individualized O-Rings prOvided the lOwest stress On the implants and the suppOrt tissues. TherefOre, the aim Of this study was tO assess the stress distributiOn, thrOugh the phOtOelastic methOd, On implant-retained palatal ObturatOr prOstheses assOciated with different attachment systems: BOC—splinted implants with a bar cOnnected tO twO centrally placed O-Rings, and BOD—splinted implants with a BC cOnnected tO twO distally placed O-Rings (cantilever). One phOtOelastic mOdel Of the maxilla with Oral-sinus-nasal cOmmunicatiOn with three parallel implants was fabricated. Afterward, twO implant-retained palatal ObturatOr prOstheses with the twO attachment systems described abOve were cOnstructed. Each assembly was pOsitiOned in a circular pOlariscOpe and a 100-N axial lOad was applied in three different regiOns with implants by using a universal testing machine. The results were Obtained thrOugh phOtOgraph recOrd analysis Of stress. The BOD system exhibited the highest stress cOncentratiOn, fOllOwed by the BOC system. The O-ring, centrally placed On the bar, allOws higher mObility Of the prOstheses and hOmOgeneOusly distributes the stress tO the regiOn Of the alveOlar ridge and implants. It can be cOncluded that the use Of implants with O-Rings, isOlated Or cOnnected with a bar, tO rehabilitate maxillectOmized patients allOws higher prOsthesis mObility and hOmOgeneOusly distributes the stress tO the alveOlar ridge regiOn, which may result in greater chewing stress distributiOn tO implants and bOne tissue. The clinical implicatiOn Of the augmented bOne suppOrt lOss after maxillectOmy is the increase Of stress in the attachment systems and, cOnsequently, a higher tendency fOr displacement Of the prOsthesis.

  • stress analysis in Oral ObturatOr prOstheses Over parallel and tilted implants phOtOelastic imaging
    Journal of Biomedical Optics, 2013
    Co-Authors: Aldieris Alves Pesqueira, Marcelo Coelho Goiato, Daniela Micheline Dos Santos, Adhara Smith Nobrega, Marcela Filie Haddad, Agda Marobo Andreotti, Amalia Moreno
    Abstract:

    This study aimed tO evaluate the stress distributiOn thrOugh the phOtOelastic methOd in implant-retained palatal ObturatOrs prOstheses. TwO phOtOelastic mOdels with buccO-sinusal cOmmunicatiOn were fabricated, One mOdel withOut implants and anOther with twO parallel implants and One tilted in the mOlar regiOn. A cOnventiOnal ObturatOr prOsthesis and five implant-retained ObturatOrs dentures with different attachment systems were fabricated: OR, three individualized O-Rings; BC, bar clip; BOC, implants splinted by bars assOciated with twO O-Rings pOsitiOned at the center Of the bar; OD, implants splinted by bars assOciated with twO O-Rings pOsitiOned in distal cantilever; and BOD, implants splinted by bars with clips assOciated with twO O-Rings pOsitiOned in distal cantilever. Each assembly (mOdel/attachment system/prOsthesis) was pOsitiOned in a circular pOlariscOpe and a lOad Of 100 N was applied On each implant. The results were Obtained by Observing the phOtOgraphic recOrd Of the tensiOns in the phOtOelastic mOdels resulting frOm the applicatiOn Of lOad. It can be Observed that a larger amOunt Of stress fringes On BC system. It was cOncluded that the attachment system has a direct influence On the stress distributiOn Of implant-retained ObturatOr prOstheses, with the three individualized O-Rings exhibiting the lOwest stress values, and tilted implants presented a biOmechanical behaviOr similar tO parallel implants.

Daniela Micheline Dos Santos - One of the best experts on this subject based on the ideXlab platform.

  • stress analysis in Oral ObturatOr prOstheses part ii phOtOelastic imaging
    Journal of Biomedical Optics, 2014
    Co-Authors: Aldieris Alves Pesqueira, Marcelo Coelho Goiato, Marcela Filie Haddad, Amalia Moreno, Emily Vivianne Freitas Da Silva, Abbas Zahoui, Daniela Micheline Dos Santos
    Abstract:

    In part I Of the study, twO attachment systems [O-ring; bar-clip (BC)] were used, and the system with three individualized O-Rings prOvided the lOwest stress On the implants and the suppOrt tissues. TherefOre, the aim Of this study was tO assess the stress distributiOn, thrOugh the phOtOelastic methOd, On implant-retained palatal ObturatOr prOstheses assOciated with different attachment systems: BOC—splinted implants with a bar cOnnected tO twO centrally placed O-Rings, and BOD—splinted implants with a BC cOnnected tO twO distally placed O-Rings (cantilever). One phOtOelastic mOdel Of the maxilla with Oral-sinus-nasal cOmmunicatiOn with three parallel implants was fabricated. Afterward, twO implant-retained palatal ObturatOr prOstheses with the twO attachment systems described abOve were cOnstructed. Each assembly was pOsitiOned in a circular pOlariscOpe and a 100-N axial lOad was applied in three different regiOns with implants by using a universal testing machine. The results were Obtained thrOugh phOtOgraph recOrd analysis Of stress. The BOD system exhibited the highest stress cOncentratiOn, fOllOwed by the BOC system. The O-ring, centrally placed On the bar, allOws higher mObility Of the prOstheses and hOmOgeneOusly distributes the stress tO the regiOn Of the alveOlar ridge and implants. It can be cOncluded that the use Of implants with O-Rings, isOlated Or cOnnected with a bar, tO rehabilitate maxillectOmized patients allOws higher prOsthesis mObility and hOmOgeneOusly distributes the stress tO the alveOlar ridge regiOn, which may result in greater chewing stress distributiOn tO implants and bOne tissue. The clinical implicatiOn Of the augmented bOne suppOrt lOss after maxillectOmy is the increase Of stress in the attachment systems and, cOnsequently, a higher tendency fOr displacement Of the prOsthesis.

  • stress analysis in Oral ObturatOr prOstheses Over parallel and tilted implants phOtOelastic imaging
    Journal of Biomedical Optics, 2013
    Co-Authors: Aldieris Alves Pesqueira, Marcelo Coelho Goiato, Daniela Micheline Dos Santos, Adhara Smith Nobrega, Marcela Filie Haddad, Agda Marobo Andreotti, Amalia Moreno
    Abstract:

    This study aimed tO evaluate the stress distributiOn thrOugh the phOtOelastic methOd in implant-retained palatal ObturatOrs prOstheses. TwO phOtOelastic mOdels with buccO-sinusal cOmmunicatiOn were fabricated, One mOdel withOut implants and anOther with twO parallel implants and One tilted in the mOlar regiOn. A cOnventiOnal ObturatOr prOsthesis and five implant-retained ObturatOrs dentures with different attachment systems were fabricated: OR, three individualized O-Rings; BC, bar clip; BOC, implants splinted by bars assOciated with twO O-Rings pOsitiOned at the center Of the bar; OD, implants splinted by bars assOciated with twO O-Rings pOsitiOned in distal cantilever; and BOD, implants splinted by bars with clips assOciated with twO O-Rings pOsitiOned in distal cantilever. Each assembly (mOdel/attachment system/prOsthesis) was pOsitiOned in a circular pOlariscOpe and a lOad Of 100 N was applied On each implant. The results were Obtained by Observing the phOtOgraphic recOrd Of the tensiOns in the phOtOelastic mOdels resulting frOm the applicatiOn Of lOad. It can be Observed that a larger amOunt Of stress fringes On BC system. It was cOncluded that the attachment system has a direct influence On the stress distributiOn Of implant-retained ObturatOr prOstheses, with the three individualized O-Rings exhibiting the lOwest stress values, and tilted implants presented a biOmechanical behaviOr similar tO parallel implants.

Schimmel Martin - One of the best experts on this subject based on the ideXlab platform.

  • O-Ring Attachments On One-Piece Mini Dental Implants: In-VitrO Analysis Of RetentiOn FOrce ReprOducibility Using Different Pristine Matrix-O-Ring COmbinatiOns.
    'Quintessence Publishing', 2021
    Co-Authors: Abou-ayash Samir, Schimmel Martin, Worni Andreas, Enkling Norbert
    Abstract:

    PURPOSE TO analyze the influence Of pristine matrix and O-ring dimensiOns On retentiOn fOrce and reprOducibility in single One-piece mini dental implants (MDIs) with ball patrices under in vitrO cOnditiOns. MATERIALS AND METHODS Three different matrix and O-ring cOmbinatiOns (MH1-MH3) were evaluated (n = 50 per grOup) On 1.8-mm-diameter implants. The matrices were manually mOunted On the implants and were subsequently remOved in a vertical linear manner using a metal pin with twO strain gauges, recOrding the maximum fOrce during discOnnectiOn. After five discOnnectiOns, the O-Rings were exchanged, and the mean retentiOn fOrce was calculated, resulting in 50 values fOr each matrix and O-ring cOmbinatiOn. Mean retentiOn fOrces, SDs, and 95% CI were calculated. Analysis Of variance was used tO test the glObal differences, and pOst hOc pairwise cOmparisOns were subsequently applied. The level Of significance was set tO P < .05. RESULTS ANOVA (glObal P 1 N cOuld nOt be demOnstrated; ie, by exchanging O-Rings, a similar retentiOn fOrce can be reestablished. CONCLUSION Matrix and O-ring dimensiOns have a significant influence On retentiOn fOrces in One-piece MDIs. Pristine O-Rings demOnstrated highly reprOducible initial retentiOn fOrces in all matrices

  • EvOlutiOn Of in vivO assessed retentiOn fOrces in One‐piece mini dental implant‐retained mandibular Overdentures: 5‐Year fOllOw‐up Of a prOspective clinical trial
    Wiley-Blackwell Publishing Inc., 2019
    Co-Authors: Abou‐ayash Samir, Worni Andreas, Enkling Norbert, Srinivasan Murali, Haueter Marius, Schimmel Martin
    Abstract:

    BACKGROUND: The evOlutiOn Of retentiOn fOrces in One-piece mini dental implants (MDIs) retaining implant Overdentures (IODs) is Of majOr impOrtance, as the male parts cannOt be exchanged, due tO the implant design. PURPOSE: TO repOrt the evOlutiOn Of retentiOn fOrces Of One-piece MDIs, retaining mandibular IODs with ball/ O-ring attachments during 5 years assessed in vivO. MATERIALS AND METHODS: FOur MDIs were installed in the interfOraminal regiOn and immediately lOaded using the existing mandibular cOmplete denture. Directly pOst-Op, at the 1-year and the 5-year fOllOw-up, the retentiOn fOrces were assessed with a validated strain gauge at each implant site separately. RESULTS: At the male part, changes cOuld Only be Observed at implant site 34: During the first year, there was a statistically significant increase, whereas the retentiOn fOrces were decreased at the 5-year fOllOw-up. At the female part, retentiOn fOrces decreased significantly Over time. Baseline values cOuld be reestablished by exchanging the O-Rings. The changes Of the retentiOn fOrces were mOre ObviOus in the pOsteriOr, cOmpared tO the anteriOr implants. CONCLUSIONS: RetentiOn fOrces at the female part decrease significantly Over time, when retaining mandibular IODs by MDIs with ball/ O-ring attachments. Baseline values can be reestablished by exchanging the O-Rings. At the male part, changes Of retentiOn fOrces depend On the implant lOcatiOn

  • EvOlutiOn Of in vivO assessed retentiOn fOrces in One-piece mini dental implant-retained mandibular Overdentures: 5-Year fOllOw-up Of a prOspective clinical trial.
    'Wiley', 2019
    Co-Authors: Abou-ayash Samir, Worni Andreas, Enkling Norbert, Srinivasan Murali, Haueter Marius, Schimmel Martin
    Abstract:

    BACKGROUND The evOlutiOn Of retentiOn fOrces in One-piece mini dental implants (MDIs) retaining implant Overdentures (IODs) is Of majOr impOrtance, as the male parts cannOt be exchanged, due tO the implant design. PURPOSE TO repOrt the evOlutiOn Of retentiOn fOrces Of One-piece MDIs, retaining mandibular IODs with ball/ O-ring attachments during 5 years assessed in vivO. MATERIALS AND METHODS FOur MDIs were installed in the interfOraminal regiOn and immediately lOaded using the existing mandibular cOmplete denture. Directly pOst-Op, at the 1-year and the 5-year fOllOw-up, the retentiOn fOrces were assessed with a validated strain gauge at each implant site separately. RESULTS At the male part, changes cOuld Only be Observed at implant site 34: During the first year, there was a statistically significant increase, whereas the retentiOn fOrces were decreased at the 5-year fOllOw-up. At the female part, retentiOn fOrces decreased significantly Over time. Baseline values cOuld be reestablished by exchanging the O-Rings. The changes Of the retentiOn fOrces were mOre ObviOus in the pOsteriOr, cOmpared tO the anteriOr implants. CONCLUSIONS RetentiOn fOrces at the female part decrease significantly Over time, when retaining mandibular IODs by MDIs with ball/ O-ring attachments. Baseline values can be reestablished by exchanging the O-Rings. At the male part, changes Of retentiOn fOrces depend On the implant lOcatiOn

Aldieris Alves Pesqueira - One of the best experts on this subject based on the ideXlab platform.

  • stress analysis in Oral ObturatOr prOstheses part ii phOtOelastic imaging
    Journal of Biomedical Optics, 2014
    Co-Authors: Aldieris Alves Pesqueira, Marcelo Coelho Goiato, Marcela Filie Haddad, Amalia Moreno, Emily Vivianne Freitas Da Silva, Abbas Zahoui, Daniela Micheline Dos Santos
    Abstract:

    In part I Of the study, twO attachment systems [O-ring; bar-clip (BC)] were used, and the system with three individualized O-Rings prOvided the lOwest stress On the implants and the suppOrt tissues. TherefOre, the aim Of this study was tO assess the stress distributiOn, thrOugh the phOtOelastic methOd, On implant-retained palatal ObturatOr prOstheses assOciated with different attachment systems: BOC—splinted implants with a bar cOnnected tO twO centrally placed O-Rings, and BOD—splinted implants with a BC cOnnected tO twO distally placed O-Rings (cantilever). One phOtOelastic mOdel Of the maxilla with Oral-sinus-nasal cOmmunicatiOn with three parallel implants was fabricated. Afterward, twO implant-retained palatal ObturatOr prOstheses with the twO attachment systems described abOve were cOnstructed. Each assembly was pOsitiOned in a circular pOlariscOpe and a 100-N axial lOad was applied in three different regiOns with implants by using a universal testing machine. The results were Obtained thrOugh phOtOgraph recOrd analysis Of stress. The BOD system exhibited the highest stress cOncentratiOn, fOllOwed by the BOC system. The O-ring, centrally placed On the bar, allOws higher mObility Of the prOstheses and hOmOgeneOusly distributes the stress tO the regiOn Of the alveOlar ridge and implants. It can be cOncluded that the use Of implants with O-Rings, isOlated Or cOnnected with a bar, tO rehabilitate maxillectOmized patients allOws higher prOsthesis mObility and hOmOgeneOusly distributes the stress tO the alveOlar ridge regiOn, which may result in greater chewing stress distributiOn tO implants and bOne tissue. The clinical implicatiOn Of the augmented bOne suppOrt lOss after maxillectOmy is the increase Of stress in the attachment systems and, cOnsequently, a higher tendency fOr displacement Of the prOsthesis.

  • stress analysis in Oral ObturatOr prOstheses Over parallel and tilted implants phOtOelastic imaging
    Journal of Biomedical Optics, 2013
    Co-Authors: Aldieris Alves Pesqueira, Marcelo Coelho Goiato, Daniela Micheline Dos Santos, Adhara Smith Nobrega, Marcela Filie Haddad, Agda Marobo Andreotti, Amalia Moreno
    Abstract:

    This study aimed tO evaluate the stress distributiOn thrOugh the phOtOelastic methOd in implant-retained palatal ObturatOrs prOstheses. TwO phOtOelastic mOdels with buccO-sinusal cOmmunicatiOn were fabricated, One mOdel withOut implants and anOther with twO parallel implants and One tilted in the mOlar regiOn. A cOnventiOnal ObturatOr prOsthesis and five implant-retained ObturatOrs dentures with different attachment systems were fabricated: OR, three individualized O-Rings; BC, bar clip; BOC, implants splinted by bars assOciated with twO O-Rings pOsitiOned at the center Of the bar; OD, implants splinted by bars assOciated with twO O-Rings pOsitiOned in distal cantilever; and BOD, implants splinted by bars with clips assOciated with twO O-Rings pOsitiOned in distal cantilever. Each assembly (mOdel/attachment system/prOsthesis) was pOsitiOned in a circular pOlariscOpe and a lOad Of 100 N was applied On each implant. The results were Obtained by Observing the phOtOgraphic recOrd Of the tensiOns in the phOtOelastic mOdels resulting frOm the applicatiOn Of lOad. It can be Observed that a larger amOunt Of stress fringes On BC system. It was cOncluded that the attachment system has a direct influence On the stress distributiOn Of implant-retained ObturatOr prOstheses, with the three individualized O-Rings exhibiting the lOwest stress values, and tilted implants presented a biOmechanical behaviOr similar tO parallel implants.

Enkling Norbert - One of the best experts on this subject based on the ideXlab platform.

  • O-Ring Attachments On One-Piece Mini Dental Implants: In-VitrO Analysis Of RetentiOn FOrce ReprOducibility Using Different Pristine Matrix-O-Ring COmbinatiOns.
    'Quintessence Publishing', 2021
    Co-Authors: Abou-ayash Samir, Schimmel Martin, Worni Andreas, Enkling Norbert
    Abstract:

    PURPOSE TO analyze the influence Of pristine matrix and O-ring dimensiOns On retentiOn fOrce and reprOducibility in single One-piece mini dental implants (MDIs) with ball patrices under in vitrO cOnditiOns. MATERIALS AND METHODS Three different matrix and O-ring cOmbinatiOns (MH1-MH3) were evaluated (n = 50 per grOup) On 1.8-mm-diameter implants. The matrices were manually mOunted On the implants and were subsequently remOved in a vertical linear manner using a metal pin with twO strain gauges, recOrding the maximum fOrce during discOnnectiOn. After five discOnnectiOns, the O-Rings were exchanged, and the mean retentiOn fOrce was calculated, resulting in 50 values fOr each matrix and O-ring cOmbinatiOn. Mean retentiOn fOrces, SDs, and 95% CI were calculated. Analysis Of variance was used tO test the glObal differences, and pOst hOc pairwise cOmparisOns were subsequently applied. The level Of significance was set tO P < .05. RESULTS ANOVA (glObal P 1 N cOuld nOt be demOnstrated; ie, by exchanging O-Rings, a similar retentiOn fOrce can be reestablished. CONCLUSION Matrix and O-ring dimensiOns have a significant influence On retentiOn fOrces in One-piece MDIs. Pristine O-Rings demOnstrated highly reprOducible initial retentiOn fOrces in all matrices

  • EvOlutiOn Of in vivO assessed retentiOn fOrces in One‐piece mini dental implant‐retained mandibular Overdentures: 5‐Year fOllOw‐up Of a prOspective clinical trial
    Wiley-Blackwell Publishing Inc., 2019
    Co-Authors: Abou‐ayash Samir, Worni Andreas, Enkling Norbert, Srinivasan Murali, Haueter Marius, Schimmel Martin
    Abstract:

    BACKGROUND: The evOlutiOn Of retentiOn fOrces in One-piece mini dental implants (MDIs) retaining implant Overdentures (IODs) is Of majOr impOrtance, as the male parts cannOt be exchanged, due tO the implant design. PURPOSE: TO repOrt the evOlutiOn Of retentiOn fOrces Of One-piece MDIs, retaining mandibular IODs with ball/ O-ring attachments during 5 years assessed in vivO. MATERIALS AND METHODS: FOur MDIs were installed in the interfOraminal regiOn and immediately lOaded using the existing mandibular cOmplete denture. Directly pOst-Op, at the 1-year and the 5-year fOllOw-up, the retentiOn fOrces were assessed with a validated strain gauge at each implant site separately. RESULTS: At the male part, changes cOuld Only be Observed at implant site 34: During the first year, there was a statistically significant increase, whereas the retentiOn fOrces were decreased at the 5-year fOllOw-up. At the female part, retentiOn fOrces decreased significantly Over time. Baseline values cOuld be reestablished by exchanging the O-Rings. The changes Of the retentiOn fOrces were mOre ObviOus in the pOsteriOr, cOmpared tO the anteriOr implants. CONCLUSIONS: RetentiOn fOrces at the female part decrease significantly Over time, when retaining mandibular IODs by MDIs with ball/ O-ring attachments. Baseline values can be reestablished by exchanging the O-Rings. At the male part, changes Of retentiOn fOrces depend On the implant lOcatiOn

  • EvOlutiOn Of in vivO assessed retentiOn fOrces in One-piece mini dental implant-retained mandibular Overdentures: 5-Year fOllOw-up Of a prOspective clinical trial.
    'Wiley', 2019
    Co-Authors: Abou-ayash Samir, Worni Andreas, Enkling Norbert, Srinivasan Murali, Haueter Marius, Schimmel Martin
    Abstract:

    BACKGROUND The evOlutiOn Of retentiOn fOrces in One-piece mini dental implants (MDIs) retaining implant Overdentures (IODs) is Of majOr impOrtance, as the male parts cannOt be exchanged, due tO the implant design. PURPOSE TO repOrt the evOlutiOn Of retentiOn fOrces Of One-piece MDIs, retaining mandibular IODs with ball/ O-ring attachments during 5 years assessed in vivO. MATERIALS AND METHODS FOur MDIs were installed in the interfOraminal regiOn and immediately lOaded using the existing mandibular cOmplete denture. Directly pOst-Op, at the 1-year and the 5-year fOllOw-up, the retentiOn fOrces were assessed with a validated strain gauge at each implant site separately. RESULTS At the male part, changes cOuld Only be Observed at implant site 34: During the first year, there was a statistically significant increase, whereas the retentiOn fOrces were decreased at the 5-year fOllOw-up. At the female part, retentiOn fOrces decreased significantly Over time. Baseline values cOuld be reestablished by exchanging the O-Rings. The changes Of the retentiOn fOrces were mOre ObviOus in the pOsteriOr, cOmpared tO the anteriOr implants. CONCLUSIONS RetentiOn fOrces at the female part decrease significantly Over time, when retaining mandibular IODs by MDIs with ball/ O-ring attachments. Baseline values can be reestablished by exchanging the O-Rings. At the male part, changes Of retentiOn fOrces depend On the implant lOcatiOn

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