Effect of the additional installation of implants in the posterior region on the prognosis of treatment in the edentulous mandibular jaw.
Identifieur interne : 002D78 ( PubMed/Curation ); précédent : 002D77; suivant : 002D79Effect of the additional installation of implants in the posterior region on the prognosis of treatment in the edentulous mandibular jaw.
Auteurs : Youji Miyamoto [Japon] ; Kenji Fujisawa ; Masaaki Takechi ; Yukihiro Momota ; Tetsuya Yuasa ; Seiko Tatehara ; Masaru Nagayama ; Eiji YamauchiSource :
- Clinical oral implants research [ 0905-7161 ] ; 2003.
Descripteurs français
- KwdFr :
- Adulte, Adulte d'âge moyen, Contrainte mécanique, Femelle, Force occlusale, Humains, Implants dentaires, Mandibule, Mâchoire édentée (), Mâchoire édentée (rééducation et réadaptation), Mâle, Pose d'implant dentaire endo-osseux (), Pronostic, Prothèse dentaire complète inférieure, Prothèse dentaire implanto-portée (), Sujet âgé, Échec de restauration dentaire.
- MESH :
- rééducation et réadaptation : Mâchoire édentée.
- Adulte, Adulte d'âge moyen, Contrainte mécanique, Femelle, Force occlusale, Humains, Implants dentaires, Mandibule, Mâchoire édentée, Mâle, Pose d'implant dentaire endo-osseux, Pronostic, Prothèse dentaire complète inférieure, Prothèse dentaire implanto-portée, Sujet âgé, Échec de restauration dentaire.
English descriptors
- KwdEn :
- Adult, Aged, Bite Force, Dental Implantation, Endosseous (methods), Dental Implants, Dental Prosthesis, Implant-Supported (methods), Dental Restoration Failure, Denture, Complete, Lower, Female, Humans, Jaw, Edentulous (rehabilitation), Jaw, Edentulous (surgery), Male, Mandible, Middle Aged, Prognosis, Stress, Mechanical.
- MESH :
- chemical : Dental Implants.
- methods : Dental Implantation, Endosseous, Dental Prosthesis, Implant-Supported.
- rehabilitation : Jaw, Edentulous.
- surgery : Jaw, Edentulous.
- Adult, Aged, Bite Force, Dental Restoration Failure, Denture, Complete, Lower, Female, Humans, Male, Mandible, Middle Aged, Prognosis, Stress, Mechanical.
Abstract
The aim of this study was to elucidate the effect of the additional installation of implants in the posterior region on the prognosis of treatment in the edentulous mandibular jaw. Fifteen patients who had received implants (Brånemark system, Nobel Biocare, Gotebörg, Sweden) in the edentulous mandible and completed a 1-year follow-up after the fitting of implant-anchored fixed prostheses were selected. In seven patients (Group A), four or five implants were installed between the mental foramina, and in eight patients (Group P), one or two implants, one on each side, were installed in the posterior regions in addition to the implants between the foramina. All implants of both groups achieved osseointegration. In Group A, there was no implant loss after loading. Six implants were lost in five patients of Group P within 1 year after loading. All of them were located in the posterior region. To elucidate whether or not the failure rate of the implants in the posterior region of Group P after loading was especially high, the failures were also compared with 89 implants, which were installed in the posterior region of the mandibles to support implant-anchored fixed partial prosthesis, during the same period (Group C). The cumulative survival rate of the implants of Group P was 60%, while that of the implants of Group C was 100% (P<0.001). When the survival rates of posterior implants with the same length of the two groups were compared, there were significant differences for the 7- and 10-mm-length implants only. These data demonstrate that the posterior implants in Group P are at greater risk. Deformation of the mandible due to jaw movement was thought to be the most likely cause of the implant loss. Therefore, when such modified treatment is chosen, it should be performed with meticulous attention.
PubMed: 15015949
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<front><div type="abstract" xml:lang="en">The aim of this study was to elucidate the effect of the additional installation of implants in the posterior region on the prognosis of treatment in the edentulous mandibular jaw. Fifteen patients who had received implants (Brånemark system, Nobel Biocare, Gotebörg, Sweden) in the edentulous mandible and completed a 1-year follow-up after the fitting of implant-anchored fixed prostheses were selected. In seven patients (Group A), four or five implants were installed between the mental foramina, and in eight patients (Group P), one or two implants, one on each side, were installed in the posterior regions in addition to the implants between the foramina. All implants of both groups achieved osseointegration. In Group A, there was no implant loss after loading. Six implants were lost in five patients of Group P within 1 year after loading. All of them were located in the posterior region. To elucidate whether or not the failure rate of the implants in the posterior region of Group P after loading was especially high, the failures were also compared with 89 implants, which were installed in the posterior region of the mandibles to support implant-anchored fixed partial prosthesis, during the same period (Group C). The cumulative survival rate of the implants of Group P was 60%, while that of the implants of Group C was 100% (P<0.001). When the survival rates of posterior implants with the same length of the two groups were compared, there were significant differences for the 7- and 10-mm-length implants only. These data demonstrate that the posterior implants in Group P are at greater risk. Deformation of the mandible due to jaw movement was thought to be the most likely cause of the implant loss. Therefore, when such modified treatment is chosen, it should be performed with meticulous attention.</div>
</front>
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<Abstract><AbstractText>The aim of this study was to elucidate the effect of the additional installation of implants in the posterior region on the prognosis of treatment in the edentulous mandibular jaw. Fifteen patients who had received implants (Brånemark system, Nobel Biocare, Gotebörg, Sweden) in the edentulous mandible and completed a 1-year follow-up after the fitting of implant-anchored fixed prostheses were selected. In seven patients (Group A), four or five implants were installed between the mental foramina, and in eight patients (Group P), one or two implants, one on each side, were installed in the posterior regions in addition to the implants between the foramina. All implants of both groups achieved osseointegration. In Group A, there was no implant loss after loading. Six implants were lost in five patients of Group P within 1 year after loading. All of them were located in the posterior region. To elucidate whether or not the failure rate of the implants in the posterior region of Group P after loading was especially high, the failures were also compared with 89 implants, which were installed in the posterior region of the mandibles to support implant-anchored fixed partial prosthesis, during the same period (Group C). The cumulative survival rate of the implants of Group P was 60%, while that of the implants of Group C was 100% (P<0.001). When the survival rates of posterior implants with the same length of the two groups were compared, there were significant differences for the 7- and 10-mm-length implants only. These data demonstrate that the posterior implants in Group P are at greater risk. Deformation of the mandible due to jaw movement was thought to be the most likely cause of the implant loss. Therefore, when such modified treatment is chosen, it should be performed with meticulous attention.</AbstractText>
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