Miriam Thöne-Mühling, Liana Pricope, Martin Mogk, Reiner Mengel
{"title":"Turned surface implants in patients treated for periodontitis: Preliminary 10- to 20-year results of a long-term cohort study.","authors":"Miriam Thöne-Mühling, Liana Pricope, Martin Mogk, Reiner Mengel","doi":"","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>This long-term cohort study investigated the prevalence of mucositis, peri-implantitis, bone loss and survival of turned surface implants in partially edentulous patients treated for periodontitis.</p><p><strong>Materials and methods: </strong>19 patients treated for generalised chronic periodontitis (GCP) and 20 patients treated for generalised aggressive periodontitis (GAP) were orally rehabilitated with a total of 126 dental implants. Examinations were performed before implant insertion, at the time of superstructure insertion, and in the subsequent years during a 3-month recall schedule over a 10- to 20-year period. At every session, clinical parameters were recorded. Intraoral radiographs were taken after insertion of superstructures and 1, 3, 5, 10, 15 and 20 years later.</p><p><strong>Results: </strong>In total, nine implants were lost during the 20-year observation period. The implant survival rate was 92.1% (GCP patients) and 90.1% (GAP patients). After 10 years, mucositis was present in 21.9% and 21.2% of implants in GCP and GAP patients, respectively. The risk of mucositis was significantly lower in patients with a removable superstructure (OR = 0.061 with P = 0.001). Peri-implantitis was present in 12.2% implants (GCP patients) and 14.1% implants (GAP patients). Implants inserted in bone quality grade 3 showed a significantly higher risk of peri-implantitis (OR = 5.658 with P = 0.003). After 10 years, implants in GAP patients did not show a significant higher bone loss (1.87 ± 1.40 mm) compared with implants in GCP patients (1.50 ± 1.30 mm). After 20 years, the total mean peri-implant bone loss was 1.98 ± 1.64 mm, almost every fifth implant revealed a bone loss > 3 mm.</p><p><strong>Conclusions: </strong>The implant survival rate in both patient groups was > 90%, and implants showed a moderate mucositis (< 30%) and peri-implantitis (< 25%) rate. Bone quality and type of superstructure seem to have had an influence on peri-implant health. These results suggest that patients with a history of periodontitis treated in a tight recall schedule can be successfully rehabilitated with turned surface implants for a follow-up period of 10 to 20 years.</p>","PeriodicalId":73463,"journal":{"name":"International journal of oral implantology (Berlin, Germany)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International journal of oral implantology (Berlin, Germany)","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
Purpose: This long-term cohort study investigated the prevalence of mucositis, peri-implantitis, bone loss and survival of turned surface implants in partially edentulous patients treated for periodontitis.
Materials and methods: 19 patients treated for generalised chronic periodontitis (GCP) and 20 patients treated for generalised aggressive periodontitis (GAP) were orally rehabilitated with a total of 126 dental implants. Examinations were performed before implant insertion, at the time of superstructure insertion, and in the subsequent years during a 3-month recall schedule over a 10- to 20-year period. At every session, clinical parameters were recorded. Intraoral radiographs were taken after insertion of superstructures and 1, 3, 5, 10, 15 and 20 years later.
Results: In total, nine implants were lost during the 20-year observation period. The implant survival rate was 92.1% (GCP patients) and 90.1% (GAP patients). After 10 years, mucositis was present in 21.9% and 21.2% of implants in GCP and GAP patients, respectively. The risk of mucositis was significantly lower in patients with a removable superstructure (OR = 0.061 with P = 0.001). Peri-implantitis was present in 12.2% implants (GCP patients) and 14.1% implants (GAP patients). Implants inserted in bone quality grade 3 showed a significantly higher risk of peri-implantitis (OR = 5.658 with P = 0.003). After 10 years, implants in GAP patients did not show a significant higher bone loss (1.87 ± 1.40 mm) compared with implants in GCP patients (1.50 ± 1.30 mm). After 20 years, the total mean peri-implant bone loss was 1.98 ± 1.64 mm, almost every fifth implant revealed a bone loss > 3 mm.
Conclusions: The implant survival rate in both patient groups was > 90%, and implants showed a moderate mucositis (< 30%) and peri-implantitis (< 25%) rate. Bone quality and type of superstructure seem to have had an influence on peri-implant health. These results suggest that patients with a history of periodontitis treated in a tight recall schedule can be successfully rehabilitated with turned surface implants for a follow-up period of 10 to 20 years.