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Biologic outcome of implant‐supported restorations in the treatment of partial edentulism

Identifieur interne : 008560 ( Main/Curation ); précédent : 008559; suivant : 008561

Biologic outcome of implant‐supported restorations in the treatment of partial edentulism

Auteurs : Ignace Naert [Belgique] ; George Koutsikakis [Belgique] ; Joke Duyck [Belgique] ; Marc Quirynen [Belgique] ; Reinhilde Jacobs [Belgique] ; Daniel Van Steenberghe [Belgique]

Source :

RBID : ISTEX:19ADF731B6DD42DE4FF5DCC451538A863E3BA29D

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English descriptors

Abstract

Abstract: The purpose of this study was to predict the outcome of implant restorations in the treatment of partial edentulism, taking into account implant interdependency and the effect of several confounding variables. Between December 1982 and June 1998, 1956 Brånemark system® implants (1212 and 744 in the maxilla and mandible, respectively, 846 distal to first premolars) were installed in 660 patients (248 males) at the Department of Periodontology of the University Hospitals of the Catholic University of Leuven. Of the 810 restorations installed at the Department of Prosthetic Dentistry of the same hospital, 235 were single crowns, 166 were supported by implants and teeth and 409 were free‐standing fixed partial prostheses. An additional 87 restorations was placed in private dental offices and were not included. The patients were followed from implant installation until June 1999. The estimated cumulative survival rates were 91.4% for all implants and 95.8% for all restorations over a period of 16 years. Estimated cumulative survival rates from loading for implant‐tooth connected and free‐standing implants were, respectively, 93.6% and 97.2%. Neither jaw site nor implant position (anterior–posterior) had any significant effect on the outcome. Short implant length, high number of implants per patient, low number of implants per prosthesis, implants loaded by acrylic‐veneered restorations and implants combined with bone grafting present a higher risk hazard for implant failure. The idea of not splinting the implants in a fixed partial prosthesis is promising but needs replication before accepting it.

Url:
DOI: 10.1034/j.1600-0501.2002.130406.x

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ISTEX:19ADF731B6DD42DE4FF5DCC451538A863E3BA29D

Le document en format XML

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<term>Abutment</term>
<term>Abutment connection</term>
<term>Account implant interdependency</term>
<term>Acrylic Resins</term>
<term>Adolescent</term>
<term>Adult</term>
<term>Aged</term>
<term>Aged, 80 and over</term>
<term>Alveolar Bone Loss (diagnostic imaging)</term>
<term>Alveolar Bone Loss (etiology)</term>
<term>Alveolar Process (diagnostic imaging)</term>
<term>Biologic outcome</term>
<term>Bone Transplantation</term>
<term>Clin</term>
<term>Clinical evaluation</term>
<term>Confounding Factors (Epidemiology)</term>
<term>Crowns</term>
<term>Cumulative survival rate</term>
<term>Cumulative survival rates</term>
<term>Dental Abutments</term>
<term>Dental Implants</term>
<term>Dental Implants, Single-Tooth</term>
<term>Dental Prosthesis Design</term>
<term>Dental Prosthesis, Implant-Supported</term>
<term>Dental Restoration Failure</term>
<term>Dental Veneers</term>
<term>Dentistry</term>
<term>Denture, Partial, Fixed</term>
<term>Edentulism</term>
<term>Edentulous</term>
<term>Edentulous patients</term>
<term>Female</term>
<term>Follow-Up Studies</term>
<term>Frailty</term>
<term>Frailty model</term>
<term>Hazard rate</term>
<term>Hazard ratio</term>
<term>Humans</term>
<term>Impl</term>
<term>Implant</term>
<term>Implant failure</term>
<term>Implant failures</term>
<term>Implant installation</term>
<term>Implant length</term>
<term>Implant research</term>
<term>Implant restorations</term>
<term>Implantate</term>
<term>Implantes</term>
<term>International journal</term>
<term>Jaw, Edentulous, Partially (diagnostic imaging)</term>
<term>Jaw, Edentulous, Partially (rehabilitation)</term>
<term>Jaw, Edentulous, Partially (surgery)</term>
<term>Last control</term>
<term>Lekholm</term>
<term>Leuven</term>
<term>Life Tables</term>
<term>Life table analysis</term>
<term>Longitudinal Studies</term>
<term>Male</term>
<term>Mandible</term>
<term>Mandible (diagnostic imaging)</term>
<term>Mandible (surgery)</term>
<term>Maxilla</term>
<term>Maxilla (diagnostic imaging)</term>
<term>Maxilla (surgery)</term>
<term>Maxillofacial</term>
<term>Maxillofacial implants</term>
<term>Membranes, Artificial</term>
<term>Metal Ceramic Alloys</term>
<term>Middle Aged</term>
<term>Naert</term>
<term>Oral impl</term>
<term>Oral implants</term>
<term>Osseointegrated</term>
<term>Osseointegration</term>
<term>Other hand</term>
<term>Partial edentulism</term>
<term>Partial prostheses</term>
<term>Partial prosthesis</term>
<term>Partial restorations table</term>
<term>Periodontology</term>
<term>Prognosis</term>
<term>Proportional Hazards Models</term>
<term>Proportional hazard model</term>
<term>Prosthesis</term>
<term>Prosthetic</term>
<term>Prosthetic dentistry</term>
<term>Quirynen</term>
<term>Radiography</term>
<term>Random effect</term>
<term>Reproducibility of Results</term>
<term>Risk Factors</term>
<term>Single crowns</term>
<term>Statistics as Topic</term>
<term>Steenberghe</term>
<term>Surgical Wound Dehiscence (etiology)</term>
<term>Survival Analysis</term>
<term>Survival function</term>
<term>Survival rate</term>
<term>Survival rates</term>
<term>Treatment Outcome</term>
<term>Upper limit</term>
<term>Years years</term>
<term>Zarb</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr">
<term>Adolescent</term>
<term>Adulte</term>
<term>Adulte d'âge moyen</term>
<term>Alliages métal céramique</term>
<term>Analyse de survie</term>
<term>Conception de prothèse dentaire</term>
<term>Couronnes</term>
<term>Facettes dentaires</term>
<term>Facteurs de confusion (épidémiologie)</term>
<term>Facteurs de risque</term>
<term>Femelle</term>
<term>Humains</term>
<term>Implants dentaires</term>
<term>Implants dentaires unitaires</term>
<term>Lâchage de suture (étiologie)</term>
<term>Mandibule ()</term>
<term>Mandibule (imagerie diagnostique)</term>
<term>Maxillaire ()</term>
<term>Maxillaire (imagerie diagnostique)</term>
<term>Membrane artificielle</term>
<term>Modèles de hasards proportionnels</term>
<term>Mâchoire partiellement édentée ()</term>
<term>Mâchoire partiellement édentée (imagerie diagnostique)</term>
<term>Mâchoire partiellement édentée (rééducation et réadaptation)</term>
<term>Mâle</term>
<term>Ostéo-intégration</term>
<term>Piliers dentaires</term>
<term>Processus alvéolaire (imagerie diagnostique)</term>
<term>Pronostic</term>
<term>Prothèse dentaire implanto-portée</term>
<term>Prothèse partielle fixe</term>
<term>Radiographie</term>
<term>Reproductibilité des résultats</term>
<term>Résines acryliques</term>
<term>Résorption alvéolaire (imagerie diagnostique)</term>
<term>Résorption alvéolaire (étiologie)</term>
<term>Résultat thérapeutique</term>
<term>Statistiques comme sujet</term>
<term>Sujet âgé</term>
<term>Sujet âgé de 80 ans ou plus</term>
<term>Tables de survie</term>
<term>Transplantation osseuse</term>
<term>Échec de restauration dentaire</term>
<term>Études de suivi</term>
<term>Études longitudinales</term>
</keywords>
<keywords scheme="MESH" type="chemical" xml:lang="en">
<term>Acrylic Resins</term>
<term>Dental Implants</term>
<term>Membranes, Artificial</term>
<term>Metal Ceramic Alloys</term>
</keywords>
<keywords scheme="MESH" qualifier="diagnostic imaging" xml:lang="en">
<term>Alveolar Bone Loss</term>
<term>Alveolar Process</term>
<term>Jaw, Edentulous, Partially</term>
<term>Mandible</term>
<term>Maxilla</term>
</keywords>
<keywords scheme="MESH" qualifier="etiology" xml:lang="en">
<term>Alveolar Bone Loss</term>
<term>Surgical Wound Dehiscence</term>
</keywords>
<keywords scheme="MESH" qualifier="imagerie diagnostique" xml:lang="fr">
<term>Mandibule</term>
<term>Maxillaire</term>
<term>Mâchoire partiellement édentée</term>
<term>Processus alvéolaire</term>
<term>Résorption alvéolaire</term>
</keywords>
<keywords scheme="MESH" qualifier="rehabilitation" xml:lang="en">
<term>Jaw, Edentulous, Partially</term>
</keywords>
<keywords scheme="MESH" qualifier="rééducation et réadaptation" xml:lang="fr">
<term>Mâchoire partiellement édentée</term>
</keywords>
<keywords scheme="MESH" qualifier="surgery" xml:lang="en">
<term>Jaw, Edentulous, Partially</term>
<term>Mandible</term>
<term>Maxilla</term>
</keywords>
<keywords scheme="MESH" qualifier="étiologie" xml:lang="fr">
<term>Lâchage de suture</term>
<term>Résorption alvéolaire</term>
</keywords>
<keywords scheme="Teeft" xml:lang="en">
<term>Abutment</term>
<term>Abutment connection</term>
<term>Account implant interdependency</term>
<term>Adolescent</term>
<term>Adult</term>
<term>Aged</term>
<term>Aged, 80 and over</term>
<term>Biologic outcome</term>
<term>Bone Transplantation</term>
<term>Clin</term>
<term>Clinical evaluation</term>
<term>Confounding Factors (Epidemiology)</term>
<term>Crowns</term>
<term>Cumulative survival rate</term>
<term>Cumulative survival rates</term>
<term>Dental Abutments</term>
<term>Dental Implants, Single-Tooth</term>
<term>Dental Prosthesis Design</term>
<term>Dental Prosthesis, Implant-Supported</term>
<term>Dental Restoration Failure</term>
<term>Dental Veneers</term>
<term>Dentistry</term>
<term>Denture, Partial, Fixed</term>
<term>Edentulism</term>
<term>Edentulous</term>
<term>Edentulous patients</term>
<term>Female</term>
<term>Follow-Up Studies</term>
<term>Frailty</term>
<term>Frailty model</term>
<term>Hazard rate</term>
<term>Hazard ratio</term>
<term>Humans</term>
<term>Impl</term>
<term>Implant</term>
<term>Implant failure</term>
<term>Implant failures</term>
<term>Implant installation</term>
<term>Implant length</term>
<term>Implant research</term>
<term>Implant restorations</term>
<term>Implantate</term>
<term>Implantes</term>
<term>International journal</term>
<term>Last control</term>
<term>Lekholm</term>
<term>Leuven</term>
<term>Life Tables</term>
<term>Life table analysis</term>
<term>Longitudinal Studies</term>
<term>Male</term>
<term>Mandible</term>
<term>Maxilla</term>
<term>Maxillofacial</term>
<term>Maxillofacial implants</term>
<term>Middle Aged</term>
<term>Naert</term>
<term>Oral impl</term>
<term>Oral implants</term>
<term>Osseointegrated</term>
<term>Osseointegration</term>
<term>Other hand</term>
<term>Partial edentulism</term>
<term>Partial prostheses</term>
<term>Partial prosthesis</term>
<term>Partial restorations table</term>
<term>Periodontology</term>
<term>Prognosis</term>
<term>Proportional Hazards Models</term>
<term>Proportional hazard model</term>
<term>Prosthesis</term>
<term>Prosthetic</term>
<term>Prosthetic dentistry</term>
<term>Quirynen</term>
<term>Radiography</term>
<term>Random effect</term>
<term>Reproducibility of Results</term>
<term>Risk Factors</term>
<term>Single crowns</term>
<term>Statistics as Topic</term>
<term>Steenberghe</term>
<term>Survival Analysis</term>
<term>Survival function</term>
<term>Survival rate</term>
<term>Survival rates</term>
<term>Treatment Outcome</term>
<term>Upper limit</term>
<term>Years years</term>
<term>Zarb</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr">
<term>Adolescent</term>
<term>Adulte</term>
<term>Adulte d'âge moyen</term>
<term>Alliages métal céramique</term>
<term>Analyse de survie</term>
<term>Conception de prothèse dentaire</term>
<term>Couronnes</term>
<term>Facettes dentaires</term>
<term>Facteurs de confusion (épidémiologie)</term>
<term>Facteurs de risque</term>
<term>Femelle</term>
<term>Humains</term>
<term>Implants dentaires</term>
<term>Implants dentaires unitaires</term>
<term>Mandibule</term>
<term>Maxillaire</term>
<term>Membrane artificielle</term>
<term>Modèles de hasards proportionnels</term>
<term>Mâchoire partiellement édentée</term>
<term>Mâle</term>
<term>Ostéo-intégration</term>
<term>Piliers dentaires</term>
<term>Pronostic</term>
<term>Prothèse dentaire implanto-portée</term>
<term>Prothèse partielle fixe</term>
<term>Radiographie</term>
<term>Reproductibilité des résultats</term>
<term>Résines acryliques</term>
<term>Résultat thérapeutique</term>
<term>Statistiques comme sujet</term>
<term>Sujet âgé</term>
<term>Sujet âgé de 80 ans ou plus</term>
<term>Tables de survie</term>
<term>Transplantation osseuse</term>
<term>Échec de restauration dentaire</term>
<term>Études de suivi</term>
<term>Études longitudinales</term>
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<div type="abstract">Abstract: The purpose of this study was to predict the outcome of implant restorations in the treatment of partial edentulism, taking into account implant interdependency and the effect of several confounding variables. Between December 1982 and June 1998, 1956 Brånemark system® implants (1212 and 744 in the maxilla and mandible, respectively, 846 distal to first premolars) were installed in 660 patients (248 males) at the Department of Periodontology of the University Hospitals of the Catholic University of Leuven. Of the 810 restorations installed at the Department of Prosthetic Dentistry of the same hospital, 235 were single crowns, 166 were supported by implants and teeth and 409 were free‐standing fixed partial prostheses. An additional 87 restorations was placed in private dental offices and were not included. The patients were followed from implant installation until June 1999. The estimated cumulative survival rates were 91.4% for all implants and 95.8% for all restorations over a period of 16 years. Estimated cumulative survival rates from loading for implant‐tooth connected and free‐standing implants were, respectively, 93.6% and 97.2%. Neither jaw site nor implant position (anterior–posterior) had any significant effect on the outcome. Short implant length, high number of implants per patient, low number of implants per prosthesis, implants loaded by acrylic‐veneered restorations and implants combined with bone grafting present a higher risk hazard for implant failure. The idea of not splinting the implants in a fixed partial prosthesis is promising but needs replication before accepting it.</div>
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<term>Longitudinal Studies</term>
<term>Male</term>
<term>Middle Aged</term>
<term>Osseointegration</term>
<term>Prognosis</term>
<term>Radiography</term>
<term>Reproducibility of Results</term>
<term>Statistics as Topic</term>
<term>Treatment Outcome</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr">
<term>Adolescent</term>
<term>Adulte</term>
<term>Adulte d'âge moyen</term>
<term>Alliages métal céramique</term>
<term>Couronnes</term>
<term>Facteurs de confusion (épidémiologie)</term>
<term>Femelle</term>
<term>Humains</term>
<term>Implants dentaires</term>
<term>Implants dentaires unitaires</term>
<term>Mandibule</term>
<term>Maxillaire</term>
<term>Membrane artificielle</term>
<term>Mâchoire partiellement édentée</term>
<term>Mâle</term>
<term>Ostéo-intégration</term>
<term>Piliers dentaires</term>
<term>Pronostic</term>
<term>Prothèse dentaire implanto-portée</term>
<term>Prothèse partielle fixe</term>
<term>Radiographie</term>
<term>Reproductibilité des résultats</term>
<term>Résultat thérapeutique</term>
<term>Statistiques comme sujet</term>
<term>Sujet âgé</term>
<term>Sujet âgé de 80 ans ou plus</term>
<term>Transplantation osseuse</term>
<term>Études de suivi</term>
<term>Études longitudinales</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">The purpose of this study was to evaluate over time the marginal bone level changes around implants installed to treat partial edentulism and to investigate the possible effect of several confounding variables. Consecutive intraoral radiographs taken with the paralleling technique were used. In all, 660 partially edentulous patients ever treated in the departments (248 males; 15-83 years of age) with 1655 implants, which were successfully integrated at abutment connection, were loaded by means of fixed partial prostheses. The observation period starting at abutment connection reached 16 years (mean 5.1). Implants were divided into three groups: 235 implants supported single-tooth crowns, 398 supported implant-tooth connected and 1022 free-standing fixed partial prostheses. Implants were placed in maxilla and mandible, both anteriorly and posteriorly. No significant difference in bone level evolution was predicted between the three groups of implants, either for posterior or for anterior sites. The estimated marginal bone loss for the first 6 months is 0.31 mm/year and after that 0.015 mm/year higher in the maxilla than in the mandible. More bone loss was predicted for the first 6 months when dehiscences existed, when a membrane or a bone graft were used, or when metal/ceramic prosthesis material was applied. Age and gender did not affect the change in bone level. The use of subsequently situated single-implant crowns to restore an edentulous space did not lead to more marginal bone loss than around splinted implants. Based on marginal bone height maintenance, the excellent prognosis of the presently used implants to support restorations in the treatment of partial edentulism was confirmed.</div>
</front>
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<title xml:lang="en">Biologic outcome of implant-supported restorations in the treatment of partial edentulism. part I: a longitudinal clinical evaluation.</title>
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<name sortKey="Naert, Ignace" sort="Naert, Ignace" uniqKey="Naert I" first="Ignace" last="Naert">Ignace Naert</name>
<affiliation wicri:level="1">
<nlm:affiliation>Department of Prosthetic Dentistry, School of Dentistry, Oral Pathology and Maxillofacial Surgery, Faculty of Medicine, Catholic University Leuven, Belgium. Ignace.Naert@med.kuleuven.ac.be</nlm:affiliation>
<country xml:lang="fr">Belgique</country>
<wicri:regionArea>Department of Prosthetic Dentistry, School of Dentistry, Oral Pathology and Maxillofacial Surgery, Faculty of Medicine, Catholic University Leuven</wicri:regionArea>
<wicri:noRegion>Catholic University Leuven</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Koutsikakis, George" sort="Koutsikakis, George" uniqKey="Koutsikakis G" first="George" last="Koutsikakis">George Koutsikakis</name>
</author>
<author>
<name sortKey="Duyck, Joke" sort="Duyck, Joke" uniqKey="Duyck J" first="Joke" last="Duyck">Joke Duyck</name>
</author>
<author>
<name sortKey="Quirynen, Marc" sort="Quirynen, Marc" uniqKey="Quirynen M" first="Marc" last="Quirynen">Marc Quirynen</name>
</author>
<author>
<name sortKey="Jacobs, Reinhilde" sort="Jacobs, Reinhilde" uniqKey="Jacobs R" first="Reinhilde" last="Jacobs">Reinhilde Jacobs</name>
</author>
<author>
<name sortKey="Van Steenberghe, Daniel" sort="Van Steenberghe, Daniel" uniqKey="Van Steenberghe D" first="Daniel" last="Van Steenberghe">Daniel Van Steenberghe</name>
</author>
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<title xml:lang="en">Biologic outcome of implant-supported restorations in the treatment of partial edentulism. part I: a longitudinal clinical evaluation.</title>
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<name sortKey="Naert, Ignace" sort="Naert, Ignace" uniqKey="Naert I" first="Ignace" last="Naert">Ignace Naert</name>
<affiliation wicri:level="1">
<nlm:affiliation>Department of Prosthetic Dentistry, School of Dentistry, Oral Pathology and Maxillofacial Surgery, Faculty of Medicine, Catholic University Leuven, Belgium. Ignace.Naert@med.kuleuven.ac.be</nlm:affiliation>
<country xml:lang="fr">Belgique</country>
<wicri:regionArea>Department of Prosthetic Dentistry, School of Dentistry, Oral Pathology and Maxillofacial Surgery, Faculty of Medicine, Catholic University Leuven</wicri:regionArea>
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</affiliation>
</author>
<author>
<name sortKey="Koutsikakis, George" sort="Koutsikakis, George" uniqKey="Koutsikakis G" first="George" last="Koutsikakis">George Koutsikakis</name>
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<author>
<name sortKey="Duyck, Joke" sort="Duyck, Joke" uniqKey="Duyck J" first="Joke" last="Duyck">Joke Duyck</name>
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<author>
<name sortKey="Quirynen, Marc" sort="Quirynen, Marc" uniqKey="Quirynen M" first="Marc" last="Quirynen">Marc Quirynen</name>
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<name sortKey="Jacobs, Reinhilde" sort="Jacobs, Reinhilde" uniqKey="Jacobs R" first="Reinhilde" last="Jacobs">Reinhilde Jacobs</name>
</author>
<author>
<name sortKey="Van Steenberghe, Daniel" sort="Van Steenberghe, Daniel" uniqKey="Van Steenberghe D" first="Daniel" last="Van Steenberghe">Daniel Van Steenberghe</name>
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<title level="j">Clinical oral implants research</title>
<idno type="ISSN">0905-7161</idno>
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<date when="2002" type="published">2002</date>
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<keywords scheme="KwdEn" xml:lang="en">
<term>Acrylic Resins</term>
<term>Adolescent</term>
<term>Adult</term>
<term>Aged</term>
<term>Aged, 80 and over</term>
<term>Bone Transplantation</term>
<term>Confounding Factors (Epidemiology)</term>
<term>Crowns</term>
<term>Dental Implants</term>
<term>Dental Prosthesis Design</term>
<term>Dental Prosthesis, Implant-Supported</term>
<term>Dental Restoration Failure</term>
<term>Dental Veneers</term>
<term>Denture, Partial, Fixed</term>
<term>Female</term>
<term>Follow-Up Studies</term>
<term>Humans</term>
<term>Jaw, Edentulous, Partially (rehabilitation)</term>
<term>Jaw, Edentulous, Partially (surgery)</term>
<term>Life Tables</term>
<term>Longitudinal Studies</term>
<term>Male</term>
<term>Mandible (surgery)</term>
<term>Maxilla (surgery)</term>
<term>Middle Aged</term>
<term>Osseointegration</term>
<term>Proportional Hazards Models</term>
<term>Risk Factors</term>
<term>Survival Analysis</term>
<term>Treatment Outcome</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr">
<term>Adolescent</term>
<term>Adulte</term>
<term>Adulte d'âge moyen</term>
<term>Analyse de survie</term>
<term>Conception de prothèse dentaire</term>
<term>Couronnes</term>
<term>Facettes dentaires</term>
<term>Facteurs de confusion (épidémiologie)</term>
<term>Facteurs de risque</term>
<term>Femelle</term>
<term>Humains</term>
<term>Implants dentaires</term>
<term>Mandibule ()</term>
<term>Maxillaire ()</term>
<term>Modèles de hasards proportionnels</term>
<term>Mâchoire partiellement édentée ()</term>
<term>Mâchoire partiellement édentée (rééducation et réadaptation)</term>
<term>Mâle</term>
<term>Ostéo-intégration</term>
<term>Prothèse dentaire implanto-portée</term>
<term>Prothèse partielle fixe</term>
<term>Résines acryliques</term>
<term>Résultat thérapeutique</term>
<term>Sujet âgé</term>
<term>Sujet âgé de 80 ans ou plus</term>
<term>Tables de survie</term>
<term>Transplantation osseuse</term>
<term>Échec de restauration dentaire</term>
<term>Études de suivi</term>
<term>Études longitudinales</term>
</keywords>
<keywords scheme="MESH" type="chemical" xml:lang="en">
<term>Acrylic Resins</term>
<term>Dental Implants</term>
</keywords>
<keywords scheme="MESH" qualifier="rehabilitation" xml:lang="en">
<term>Jaw, Edentulous, Partially</term>
</keywords>
<keywords scheme="MESH" qualifier="rééducation et réadaptation" xml:lang="fr">
<term>Mâchoire partiellement édentée</term>
</keywords>
<keywords scheme="MESH" qualifier="surgery" xml:lang="en">
<term>Jaw, Edentulous, Partially</term>
<term>Mandible</term>
<term>Maxilla</term>
</keywords>
<keywords scheme="MESH" xml:lang="en">
<term>Adolescent</term>
<term>Adult</term>
<term>Aged</term>
<term>Aged, 80 and over</term>
<term>Bone Transplantation</term>
<term>Confounding Factors (Epidemiology)</term>
<term>Crowns</term>
<term>Dental Prosthesis Design</term>
<term>Dental Prosthesis, Implant-Supported</term>
<term>Dental Restoration Failure</term>
<term>Dental Veneers</term>
<term>Denture, Partial, Fixed</term>
<term>Female</term>
<term>Follow-Up Studies</term>
<term>Humans</term>
<term>Life Tables</term>
<term>Longitudinal Studies</term>
<term>Male</term>
<term>Middle Aged</term>
<term>Osseointegration</term>
<term>Proportional Hazards Models</term>
<term>Risk Factors</term>
<term>Survival Analysis</term>
<term>Treatment Outcome</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr">
<term>Adolescent</term>
<term>Adulte</term>
<term>Adulte d'âge moyen</term>
<term>Analyse de survie</term>
<term>Conception de prothèse dentaire</term>
<term>Couronnes</term>
<term>Facettes dentaires</term>
<term>Facteurs de confusion (épidémiologie)</term>
<term>Facteurs de risque</term>
<term>Femelle</term>
<term>Humains</term>
<term>Implants dentaires</term>
<term>Mandibule</term>
<term>Maxillaire</term>
<term>Modèles de hasards proportionnels</term>
<term>Mâchoire partiellement édentée</term>
<term>Mâle</term>
<term>Ostéo-intégration</term>
<term>Prothèse dentaire implanto-portée</term>
<term>Prothèse partielle fixe</term>
<term>Résines acryliques</term>
<term>Résultat thérapeutique</term>
<term>Sujet âgé</term>
<term>Sujet âgé de 80 ans ou plus</term>
<term>Tables de survie</term>
<term>Transplantation osseuse</term>
<term>Échec de restauration dentaire</term>
<term>Études de suivi</term>
<term>Études longitudinales</term>
</keywords>
</textClass>
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</teiHeader>
<front>
<div type="abstract" xml:lang="en">The purpose of this study was to predict the outcome of implant restorations in the treatment of partial edentulism, taking into account implant interdependency and the effect of several confounding variables. Between December 1982 and June 1998, 1956 Brånemark system implants (1212 and 744 in the maxilla and mandible, respectively, 846 distal to first premolars) were installed in 660 patients (248 males) at the Department of Periodontology of the University Hospitals of the Catholic University of Leuven. Of the 810 restorations installed at the Department of Prosthetic Dentistry of the same hospital, 235 were single crowns, 166 were supported by implants and teeth and 409 were free-standing fixed partial prostheses. An additional 87 restorations was placed in private dental offices and were not included. The patients were followed from implant installation until June 1999. The estimated cumulative survival rates were 91.4% for all implants and 95.8% for all restorations over a period of 16 years. Estimated cumulative survival rates from loading for implant-tooth connected and free-standing implants were, respectively, 93.6% and 97.2%. Neither jaw site nor implant position (anterior-posterior) had any significant effect on the outcome. Short implant length, high number of implants per patient, low number of implants per prosthesis, implants loaded by acrylic-veneered restorations and implants combined with bone grafting present a higher risk hazard for implant failure. The idea of not splinting the implants in a fixed partial prosthesis is promising but needs replication before accepting it.</div>
</front>
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</record>

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