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Implant treatment in edentulous maxillae: a 5-year follow-up report on patients with different degrees of jaw resorption.

Identifieur interne : 011249 ( Main/Exploration ); précédent : 011248; suivant : 011250

Implant treatment in edentulous maxillae: a 5-year follow-up report on patients with different degrees of jaw resorption.

Auteurs : T. Jemt [Suède] ; U. Lekholm

Source :

RBID : pubmed:7615326

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English descriptors

Abstract

In a retrospective study, 150 patients with edentulous maxillae were selected for treatment with Brånemark implants. The patients were arranged into four different groups, based on jaw shape prior to implant placement. After second-stage surgery, they were provided with either fixed prostheses, removable overdentures followed by fixed prostheses after at least 1 year, or overdentures for the whole period. Patients were followed up for 5 years, with implant and prosthesis survival, annual visits, marginal bone loss, and complications recorded. Results of the study indicated that treatment outcome in edentulous maxillae might be predicted by careful presurgical evaluation of jaw shape. Five-year cumulative implant failure rates varied from 7.9% for patients considered to have enough bone to be provided with fixed prostheses immediately after second-stage surgery to 28.8% for those with severely resorbed jaws receiving an overdenture. The corresponding cumulative prosthesis failure rates were 3.0% and 18.9%, respectively. Patients provided with autogenous bone grafts compared favorably to the group presenting severely resorbed jaws and provided with overdentures, but showed a compromised result compared to the group with the least resorption. Failure of implant treatment correlated significantly with bone quality and ratio of 7-mm implants. All groups, except those treated with bone grafts, showed an average marginal bone level of 1.2 mm after 5 years, irrespective of type of prosthesis. The bone-grafted group showed a corresponding mean level of 2.3 mm after 5 years of function. Regarding clinical complications, a different pattern, mainly related to the type of prosthetic construction used, was observed between the groups. The number of visits clearly indicated that severely resorbed jaws provided with overdentures were the most demanding.

PubMed: 7615326


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Le document en format XML

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<term>Bone Transplantation</term>
<term>Dental Implantation, Endosseous (methods)</term>
<term>Dental Implants</term>
<term>Dental Prosthesis Design</term>
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<term>Adulte</term>
<term>Adulte d'âge moyen</term>
<term>Analyse de régression</term>
<term>Analyse de survie</term>
<term>Conception de prothèse dentaire</term>
<term>Défaillance de prothèse</term>
<term>Femelle</term>
<term>Humains</term>
<term>Implants dentaires</term>
<term>Maladies du maxillaire supérieur ()</term>
<term>Maladies du maxillaire supérieur (anatomopathologie)</term>
<term>Maladies du maxillaire supérieur (rééducation et réadaptation)</term>
<term>Mâchoire édentée ()</term>
<term>Mâchoire édentée (anatomopathologie)</term>
<term>Mâchoire édentée (rééducation et réadaptation)</term>
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<term>Overdenture</term>
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<term>Prothèse partielle fixe</term>
<term>Résorption alvéolaire ()</term>
<term>Résorption alvéolaire (anatomopathologie)</term>
<term>Rétention de prothèse dentaire</term>
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<term>Tables de survie</term>
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<term>Mâchoire édentée</term>
<term>Résorption alvéolaire</term>
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<term>Follow-Up Studies</term>
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<term>Middle Aged</term>
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<term>Retrospective Studies</term>
<term>Survival Analysis</term>
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<term>Adulte d'âge moyen</term>
<term>Analyse de régression</term>
<term>Analyse de survie</term>
<term>Conception de prothèse dentaire</term>
<term>Défaillance de prothèse</term>
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<term>Rétention de prothèse dentaire</term>
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<term>Tables de survie</term>
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<div type="abstract" xml:lang="en">In a retrospective study, 150 patients with edentulous maxillae were selected for treatment with Brånemark implants. The patients were arranged into four different groups, based on jaw shape prior to implant placement. After second-stage surgery, they were provided with either fixed prostheses, removable overdentures followed by fixed prostheses after at least 1 year, or overdentures for the whole period. Patients were followed up for 5 years, with implant and prosthesis survival, annual visits, marginal bone loss, and complications recorded. Results of the study indicated that treatment outcome in edentulous maxillae might be predicted by careful presurgical evaluation of jaw shape. Five-year cumulative implant failure rates varied from 7.9% for patients considered to have enough bone to be provided with fixed prostheses immediately after second-stage surgery to 28.8% for those with severely resorbed jaws receiving an overdenture. The corresponding cumulative prosthesis failure rates were 3.0% and 18.9%, respectively. Patients provided with autogenous bone grafts compared favorably to the group presenting severely resorbed jaws and provided with overdentures, but showed a compromised result compared to the group with the least resorption. Failure of implant treatment correlated significantly with bone quality and ratio of 7-mm implants. All groups, except those treated with bone grafts, showed an average marginal bone level of 1.2 mm after 5 years, irrespective of type of prosthesis. The bone-grafted group showed a corresponding mean level of 2.3 mm after 5 years of function. Regarding clinical complications, a different pattern, mainly related to the type of prosthetic construction used, was observed between the groups. The number of visits clearly indicated that severely resorbed jaws provided with overdentures were the most demanding.</div>
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