scholarly journals Survival and Marginal Bone Loss of Dental Implants Supporting Cad-Cam Angled Channel Restorations: A Split-Mouth Retrospective Study

2020 ◽  
Vol 14 (02) ◽  
pp. 194-199 ◽  
Author(s):  
Eduardo Anitua ◽  
Sofía Fernández-de-Retana ◽  
Mohammad Hamdan Alkhraisat
Keyword(s):  
Retrospective Study ◽  
Bone Loss ◽  
Dental Implants ◽  
Implant Survival ◽  
Marginal Bone Loss ◽  
Screw Channel ◽  
Computer Aided ◽  
Cad Cam ◽  
The Mean

Abstract Objective The aim of this study was to determine whether the screw emergence angulation correction by computer-aided design (CAD)-computer-aided manufacturing (CAM) can influence implant survival and marginal bone stability. Materials and Methods This was a controlled split-mouth retrospective study of angled channel restorations. The dental implants supporting the prosthesis were divided into the following two groups: the first group (Group 1) included the implants that required screw channel angulation, while the second group (Group 2) included the implants that did not require this correction to screw the prosthesis to the implant. The main outcome variables were implant survival and marginal bone loss (MBL). Results A total of 68 dental implants placed in 22 patients were included in the final cohort. The mean follow-up time was 39.65 ± 15.20 months. None of the studied implants failed during the follow-up period and the mean MBL was − 0.29 ± 0.51 mm at the end of the follow-up. No statistical differences in the MBL were observed between the two groups of the study (-0.18 ± 0.51 and − 0.23 ± 0.58 mm, respectively). Conclusion The angulation of the screw channel with CAD-CAM technology resulted in good clinical outcomes and did not affect MBL. Thus, the angulated screw channel might be considered an alternative to face undesired screw emergencies. Future prospective clinical studies should confirm these results.

scholarly journals Clinical outcomes of dental implants placed in the same region where previous implants failed due to peri-implantitis: a retrospective study

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Eduardo Anitua ◽  
Adriana Montalvillo ◽  
Asier Eguia ◽  
Mohammad Hamdan Alkhraisat
Keyword(s):  
Retrospective Study ◽  
Survival Rate ◽  
Bone Loss ◽  
Clinical Outcomes ◽  
Dental Implants ◽  
Demographic Data ◽  
High Survival ◽  
Implant Survival ◽  
Marginal Bone Loss ◽  
Bone Level

Abstract Purpose There is paucity in the studies that assess dental implants replacing failed dental implants due to peri-implantitis. This study aims to evaluate the clinical outcomes of these implants in terms of implant survival and marginal bone loss. Methods Patients in this retrospective study were selected if having one or more implants removed due to peri-implantitis and the placement and loading of dental implants in the same region from April 2010 to December 2019. Information was collected about the patient's demographic data, implant dimensions, surgical and prosthetic variables. Changes in peri-implant bone level, cumulative implant survival rate and technical complications were assessed. Results Three hundred and eighty one dental implants in 146 patients that were placed in the same position or one-tooth position mesially/distally to the site of explantation were included. The patients' mean age was 63 ± 10 years. Ninety seven patients were females and 49 were males. After a mean follow-up of 34 ± 17 months, two implants failed. The cumulative survival rate was 99%. The marginal bone loss was −0.1 ± 0.6. Immediate or delay replacement of the failed implant did not affect implant survival or marginal bone stability. All the prostheses were screw-retained and presented the following complications: ceramic chipping (3 events), resin tooth fracture (1 event) and prosthetic screw loosening (1 event). Conclusions Dental implants replacing failed implants due to peri-implantitis would be an option in the management of peri-implantitis. They showed high survival rate and marginal bone stability.

scholarly journals Effect of Opposite Tooth Condition on Marginal Bone Loss around Submerged Dental Implants: A Retrospective Study with a 3-Year Follow-Up

2021 ◽  
Vol 18 (20) ◽  
pp. 10715
Author(s):  
Odontuya Dorj ◽  
Hsi-Kuei Lin ◽  
Eisner Salamanca ◽  
Yu-Hwa Pan ◽  
Yi-Fan Wu ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Bone Loss ◽  
Dental Implants ◽  
Marginal Bone Loss ◽  
Bone Level ◽  
Natural Teeth ◽  
Marginal Bone Level

Background: The objective of this study was to evaluate the effects of opposite tooth conditions on change in marginal bone level (MBL) around submerged dental implants. Materials and methods: The study included healthy patients with one or two implants. Structures opposite implants were either natural teeth (NT) or fixed restorations (FRs). MBLs were measured on digital periapical radiographs at the mesial and distal aspects of each implant. Results: Sixty implants were inserted by the 3-year follow-up. Mean MBLs for NT were 0.21 ± 0.33 mm before prosthetic loading and 0.30 ± 0.41 mm 3 years later (p = 0.001). Mean MBLs with FRs were 0.36 ± 0.45 mm before loading and 0.53 ± 0.50 mm 3 years later (p < 0.001). Changes in mean MBL from the 6-month follow-up to the 1- and 3-year follow-ups were statistically significant (p < 0.01) for implants opposite NT. However, changes in mean MBL from the 6-month follow-up to the 1-year (p = 0.161) and 3-year follow-ups (p = 1.000) were not significant for implants opposite FRs. Between baseline and the 3-year follow-up, MBL change was relatively small and did not differ regarding NT and FRs. Conclusion: Bone loss was greater if submerged dental implants were opposed by FRs. MBLs around submerged implants continued to change after 3 years if NT opposed implants.

scholarly journals Clinical Comparation of Extra-Short (4 mm) and Long (>8 mm) Dental Implants Placed in Mandibular Bone: A Systematic Review and Metanalysis

Healthcare ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 315
Author(s):  
Vittorio Moraschini ◽  
Carlos Fernando de Almeida Barros Mourão ◽  
Pietro Montemezzi ◽  
Ingrid Chaves Cavalcante Kischinhevsky ◽  
Daniel Costa Ferreira de Almeida ◽  
...  
Keyword(s):  
Systematic Review ◽  
Survival Rate ◽  
Bone Loss ◽  
Dental Implants ◽  
Implant Survival ◽  
Marginal Bone Loss ◽  
Implant Survival Rate ◽  
Short Implants ◽  
Prosthetic Complications

This systematic review (SR) aimed to evaluate implant survival rate, marginal bone loss (MBL), and biological/prosthetic complications of extra-short 4 mm dental implants. An electronic search without language or date restrictions was performed in five databases and in gray literature for articles published until August 2020. Prospective cohort studies and randomized clinical trials (RCTs) that evaluated the clinical performance of extra-short 4 mm dental implants were included. Studies were independently assessed for risk of bias using the Cochrane Collaboration’s tool. The protocol of this SR was registered in the PROSPERO database under number CRD42019139709. Four studies were included in the present SR. There was no significant difference in implant survival rate (p = 0.75) between extra-short 4 mm and long implants. After 12 months of function, the extra-short implants had a significantly (p = 0.003) lower marginal bone loss (MBL) rate when compared to long implants. Extra-short implants had a lower number of biological and prosthetic complications when compared to long implants. After 12 months of follow-up, extra-short 4 mm dental implants placed in the mandible exhibit satisfactory clinical outcomes concerning implant survival rate and MBL when compared to longer implants, with a low number of biological and prosthetic complications. A higher number of RCTs with longer follow-up is necessary for the future.

scholarly journals Crown-to-implant ratio of short locking-taper implants placed in posterior areas of the maxilla: a retrospective study 2 years after loading

2017 ◽  
pp. 89-94
Author(s):  
Lombardo Giorgio ◽  
Pighi Jacopo ◽  
Corrocher Giovanni ◽  
Simancas Pallares Miguel Angel ◽  
Marincola Mauro ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Clinical Study ◽  
Bone Loss ◽  
Ratio Analysis ◽  
Marginal Bone Loss ◽  
Cumulative Survival ◽  
Retrospective Clinical Study ◽  
The Mean ◽  
Short Implant

Introduction: The purpose was to study any relationship between crown-to-implant ratio and peri-implant bone loss of short, plateau-design, locking taper implants in posterior maxillary areas. Methods: This retrospective clinical study was conducted between May 2013 and September 2013. The sample was composed of patients who had received at least one short implant(5-to-8-mm-long) between January 2009 and December 2011. The outcome variables were implant failure and peri-implant bone loss in relation to crown-to-implant ratio. Analysis of variance (ANOVA) was used to check out correlations between crown-to-implant ratio and peri-implant bone loss. Results: Thirty-six subject who received 79 locking-taper implants were followed for an average of 24 months. Four implants failed, giving a cumulative survival rate (CSR) of 94.9%. The mean crown-to-implant ratio was 2.01. The peri-implant bone loss between prosthetic loading and last recall was 0.21 mm. No statistically significant relationship was observed between increasing crown-implant ratios and marginal bone loss (P = .93). Conclusion: The crown-to-implant ratio, although high, was not associated to increased bone loss. However further studies with longer follow-up are needed to confirm our data.

scholarly journals Survival Rate of 1008 Short Dental Implants with 21 Months of Average Follow-Up: A Retrospective Study

2020 ◽  
Vol 9 (12) ◽  
pp. 3943
Author(s):  
João Caramês ◽  
Ana Catarina Pinto ◽  
Gonçalo Caramês ◽  
Helena Francisco ◽  
Joana Fialho ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Survival Rate ◽  
Dental Implants ◽  
Cox Regression ◽  
Survival Rates ◽  
High Survival ◽  
Implant Survival ◽  
Posterior Maxilla ◽  
Clinical Records

This retrospective study evaluated the survival rate of short, sandblasted acid-etched surfaced implants with 6 and 8 mm lengths with at least 120 days of follow-up. Data concerning patient, implant and surgery characteristics were retrieved from clinical records. Sandblasted and acid-etched (SLA)-surfaced tissue-level 6 mm (TL6) or 8 mm (TL8) implants or bone-level tapered 8 mm (BLT8) implants were used. Absolute and relative frequency distributions were calculated for qualitative variables and mean values and standard deviations for quantitative variables. A Cox regression model was performed to verify whether type, length and/or width influence the implant survival. The cumulative implant survival rate was assessed by time-to-event analyses (Kaplan–Meier estimator). In all, 513 patients with a mean age of 58.00 ± 12.44 years received 1008 dental implants with a mean follow-up of 21.57 ± 10.77 months. Most implants (78.17%) presented a 4.1 mm diameter, and the most frequent indication was a partially edentulous arch (44.15%). The most frequent locations were the posterior mandible (53.97%) and the posterior maxilla (31.55%). No significant differences were found in survival rates between groups of type, length and width of implant with the cumulative rate being 97.7% ± 0.5%. Within the limitations of this study, the evaluated short implants are a predictable option with high survival rates during the follow-up without statistical differences between the appraised types, lengths and widths.

scholarly journals Assessment of Peri-Implant Soft Tissues Conditions around Short and Ultra-Short Implant-Supported Single Crowns: A 3-Year Retrospective Study on Periodontally Healthy Patients and Patients with a History of Periodontal Disease

2020 ◽  
Vol 17 (24) ◽  
pp. 9354
Author(s):  
Giorgio Lombardo ◽  
Annarita Signoriello ◽  
Mauro Marincola ◽  
Pier Francesco Nocini
Keyword(s):  
Retrospective Study ◽  
Bone Loss ◽  
Periodontal Disease ◽  
Soft Tissues ◽  
Implant Survival ◽  
Marginal Bone Loss ◽  
Implant Complications ◽  
Short Implants ◽  
History Of ◽  
Single Crowns

The aim of this retrospective study was to evaluate implant survival, marginal bone loss and peri-implant complications in 326 short and ultra-short implants. Implants were placed in the maxillary and mandibular posterior regions of 140 patients with (PP) and without (NPP) a history of periodontal disease. Clinical and radiographic examinations were performed at 3-year recall appointments. The 8.0, 6.0 and 5.0 mm-length implants placed in PP and NPP were respectively 43.75% and 38.46%, 35.10% and 34.19%, 21.15% and 27.35%; 325 implants (one early failure) were rehabilitated with single crowns in 139 patients. Overall implant survival after 3 years of follow-up was 97.55%, 98.08% and 96.61% for PP and NPP (p = 0.46). Crestal bone level variations were not statistically different among PP and NPP; 15.41% of implants presented signs of mucositis, 14.71% and 16.67% in PP and NPP (p = 0.64). Setting the threshold for bone loss at 2 mm after 36 months, peri-implantitis prevalence was 2.2%, 1.96% and 2.63% in PP and NPP (p = 0.7). Overall implant success was 82.39%, 83.33% and 80.7% for PP and NPP (p = 0.55). Short-term outcomes suggest that short and ultra-short locking-taper implants can successfully be restored with single crowns in the posterior jaws both in PP and NPP.

scholarly journals Peri-Implant Behavior of Sloped Shoulder Dental Implants Used for All-On-Four Protocols: An Histomorphometric Analysis in Dogs

Materials ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 119 ◽  
Author(s):  
Jose Calvo Guirado ◽  
Aldo Lucero-Sánchez ◽  
Ana Boquete Castro ◽  
Marcus Abboud ◽  
Sergio Gehrke ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Bone Loss ◽  
Dental Implants ◽  
Test Group ◽  
Control Group ◽  
Histomorphometric Analysis ◽  
Tissue Thickness ◽  
Marginal Bone Loss ◽  
Soft Tissue Thickness ◽  
The Mean

The aim of this study was to evaluate the soft tissue thickness and marginal bone loss around dental implants with sloped micro-threaded shoulder (30° angle) in comparing with conventional design, inserted 30° degrees angulated in post extraction sockets and immediate loaded with temporary prosthesis simulating the all-on-four protocol. Materials and Methods: Six fox hound dogs received forty-eight post extraction dental implants with the different diameter and length (Medentika, Germany), but with different neck configurations. Two group of implants were inserted 1mm subcrestal. Control group has a micro-threaded neck and the Test group has a sloped microthreaded neck. Immediate loading was applied using a constructed metallic structure. After three months, soft and hard tissue levels were assessed by histomorphometric analysis. Results: The mean soft tissue thickness (STT) was 2.5 ± 0.2 mm for the Control group and 3.3 ± 0.3 mm for Test group (p = 0.036), meanwhile the mean marginal bone loss (MBL) was 1.53 ± 0.34 mm for Control group and, 1.62 ± 0.22 mm for Test group (p > 0.05). Conclusions: Within the limitations of this experimental model in dogs, the findings showed that dental implants with microthreaded and microthreaded sloped necks installed in immediate post extraction sites with immediate load, presented a comparable perimplant tissue behavior.

scholarly journals A One-year Follow-up Study of a Tapered Hydrophilic Implant Design Using Various Placement Protocols in the Maxilla

2016 ◽  
Vol 10 (1) ◽  
pp. 680-691 ◽  
Author(s):  
Jakob Zwaan ◽  
Leonardo Vanden Bogaerde ◽  
Herman Sahlin ◽  
Lars Sennerby
Keyword(s):  
Survival Rate ◽  
Bone Loss ◽  
Implant Design ◽  
Insertion Torque ◽  
Daily Routine ◽  
High Survival ◽  
Marginal Bone Loss ◽  
The Mean ◽  
One Year

Purpose: To study the clinical/radiographic outcomes and stability of a tapered implant design with a hydrophilic surface when placed in the maxilla using various protocols and followed for one year. Methods: Ninety-seven consecutive patients treated as part of daily routine in two clinics with 163 tapered implants in healed sites, in extraction sockets and together with bone augmentation procedures in the maxilla were evaluated after one year in function. Individual healing periods varying from 0 to 6 months had been used. Insertion torque (IT) and resonance frequency analysis (RFA) measurements were made at baseline. Follow-up RFA registrations were made after 6 and 12 months of loading. The marginal bone levels were measured in intraoral radiographs from baseline and after 12 months. A reference group consisting of 163 consecutive straight maxillary implants was used for the comparison of baseline IT and RFA measurements. Results: Five implants failed before loading, giving an implant survival rate of 96.9% and a prosthesis survival rate of 99.4% after one year. The mean marginal bone loss after one year was 0.5 mm (SD 0.4). The mean IT was statistically significantly higher for tapered than for straight reference implants (41.3 ± 12.0 Ncm vs 33.6 ± 12.5 Ncm, p < 0.001). The tapered implants showed a statistically insignificantly higher mean ISQ value than the straight references implants (73.7 ± 6.4 ISQ vs 72.2 ± 8.0 ISQ, p=0.119). There was no correlation between IT and marginal bone loss. There was a correlation between IT and RFA measurements (p < 0.001). Conclusion: The tapered implant showed a high survival rate and minimal marginal bone loss after one year in function when using various protocols for placement. The tapered implant showed significantly higher insertion torque values than straight reference implants.

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