scholarly journals A Prospective Clinical Cohort Investigation on Zirconia Implants: 5-Year Results

2020 ◽  
Vol 9 (8) ◽  
pp. 2585
Author(s):  
Ralf-Joachim Kohal ◽  
Benedikt Christopher Spies ◽  
Kirstin Vach ◽  
Marc Balmer ◽  
Stefano Pieralli
Keyword(s):  
Survival Rate ◽  
Bone Loss ◽  
Clinical Investigation ◽  
Marginal Bone Loss ◽  
Oral Implants ◽  
Fixed Dental Prosthesis ◽  
Patient Reported ◽  
Implant System ◽  
Zirconia Implants

Mid-term data on zirconia oral implants is very rare. Therefore, the aim of this prospective clinical investigation was to evaluate the survival rate and the marginal bone loss of a one-piece zirconia implant after five years. Patient-reported outcomes were also recorded. Zirconia implants to support single crowns (SC) or a 3-unit fixed dental prosthesis (FDP) were placed and subsequently restored. After the insertion of the implants, at prosthetic delivery, and after five years, standardized radiographs were taken to evaluate marginal bone loss (MBL). For bone tissue evaluation, linear mixed models with random intercepts were fitted. Twenty-seven patients received one implant for an SC and 13 patients received two implants for a 3-unit FDP. Three patients each lost one implant for an SC before prosthetic delivery. Thirty-five patients were seen after five years, and no further implant was lost. The cumulative five-year implant survival rate was 94.3%. The MBL from implant installation up to five years was 0.81 mm. The MBL from implant installation to prosthetic delivery was statistically significant (p < 0.001). Patients perceived a significant improvement in function, esthetics, sense, speech, and self-esteem from pretreatment up to the five-year follow-up. The present findings substantiate the clinical applicability of this implant system.

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.

scholarly journals Scientific Trends in Clinical Research on Zirconia Dental Implants: A Bibliometric Review

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5534
Author(s):  
Felice Lorusso ◽  
Sammy Noumbissi ◽  
Inchingolo Francesco ◽  
Biagio Rapone ◽  
Ahmad G. A. Khater ◽  
...  
Keyword(s):  
Survival Rate ◽  
Bone Loss ◽  
Clinical Research ◽  
Dental Implants ◽  
Clinical Studies ◽  
Medical Center ◽  
Marginal Bone Loss ◽  
Oral Rehabilitation ◽  
Bibliometric Review ◽  
Zirconia Implants

Background: The clinical use of zirconia implants has been shown to increase steadily due to their biological, aesthetic, and physical properties; therefore, this bibliometric study aimed to review the clinical research and co-authors in the field of zirconia dental implant rehabilitation. Methods: We searched Scopus and Web of Science databases using a comprehensive search strategy to 5 October 2020, and independently paired reviewers who screened studies, and collected data with inclusion criteria restricted to clinical research only (either prospective or retrospective). Data on article title, co-authors, number of citations received, journal details, publication year, country and institution involved, funding, study design, marginal bone loss, survival rate, failure, follow-up, and the author’s bibliometric data were collected and evaluated. Results: A total of 29 clinical studies were published between 2008 and 2020 as 41.4% were prospective cohort studies and 48.3% originated from Germany. Most of the included studies had been published in Clinical Oral Implant Research (n = 12), and the most productive institution was the Medical Center of University of Freiburg. The author with the largest number of clinical studies on zirconia implants was Kohal R.J. (n = 10), followed by Spies B.C. (n = 8). Conclusions: This study revealed that zirconia implants have been more prominent in the last ten years, which is a valuable option for oral rehabilitation with marginal bone loss and survival rate comparable to titanium dental implants.

scholarly journals Rehabilitation of the Completely Edentulous Mandible by All-on-Four Treatment Concept: A Retrospective Cohort Study with Up to 10 Years Follow-Up

Medicina ◽  
2021 ◽  
Vol 58 (1) ◽  
pp. 10
Author(s):  
Tommaso Grandi ◽  
Luca Signorini
Keyword(s):  
Survival Rate ◽  
Bone Loss ◽  
Treatment Concept ◽  
Marginal Bone Loss ◽  
Mechanical Complications ◽  
Prosthesis Survival ◽  
Edentulous Mandible ◽  
Significant Difference

(1) Background and Objectives. Currently, there are no definitive long-term data about clinically significant difference in the failure of prosthesis and implant or marginal bone loss related to the rehabilitation of the completely edentulous mandible by all-on-four treatment concept. The main aim of present investigation was to report the long-term outcomes (10-years follow-up) of complete-arch mandibular rehabilitations based on the all-on-four concept. (2) Materials and Methods. Patients in need of extractions of teeth due to the occurrence of caries and/or severe periodontal disease and patients presented with edentulous mandibles were enrolled to the study. A total of 96 participants (mean follow-up period after intervention of 3185.2 days) were enrolled in the study. Participants were evaluated at the first visit, 10 days after intervention and every year after the intervention. Implant and prosthesis survival, bone loss and both local biological and mechanical complications were evaluated during the follow-up period. (3) Results. An implants’ survival rate of 97.9% was observed at the end of the follow-up period. Biological complications were reported in 19.8% of patients, whereas mechanical complications were reported in 27.1% of cases. The average marginal bone level at baseline was −0.03 mm. A significant marginal bone loss was observed after 10-years follow-up (2.5 mm). Binary logistic regression analysis showed significant association between smoke and both marginal bone loss and local biological complications. Lastly, a significant association was observed between bruxism and mechanical complications. (4) Conclusions. The high implant and prosthesis survival rate and the moderate incidence of biological and mechanical complications observed in present investigation can be associated to several factors such as high implant primary stability, prosthetic design, and control of the occlusal forces.

scholarly journals Use of Narrow-Diameter Implants in Completely Edentulous Patients as a Prosthetic Option: A Systematic Review of the Literature

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
S. Storelli ◽  
A. Caputo ◽  
G. Palandrani ◽  
M. Peditto ◽  
M. Del Fabbro ◽  
...  
Keyword(s):  
Survival Rate ◽  
Bone Loss ◽  
Random Effect ◽  
Cochrane Library ◽  
High Survival ◽  
Marginal Bone Loss ◽  
Hand Search ◽  
Edentulous Patients ◽  
Narrow Diameter Implants

Objective. The objective of the present review is to assess the implant survival, marginal bone loss, and biomechanical features of narrow-diameter implants (2.5-3.5 mm) supporting or retaining full-arch fixed or removable restorations. Materials and Methods. Three operators screened the literature (PubMed, Cochrane Library, and Google Scholar) and performed a hand search on the main journals that focus on implantology until 24 March 2019. Only articles that considered full-arch restorations supported or retained by narrow-diameter implants (2.5-3.5 mm) were considered if they have a minimum of 10 patients and a mean follow-up of at least 6 months. The outcome variables were survival of implants and marginal bone loss. The review was performed according to the PRISMA statements. Risk of bias assessment was evaluated. Failure rates were analyzed using random effect Poisson regression models to obtain the summary estimate of 5-year survival rate and marginal bone loss. Results. A total of nine papers were finally selected, reporting a high survival rate of the implants. Eight studies focused only on the mandible while one study reported data from both mandible and maxilla. All studies reported on removable restorations; none focused on fixed rehabilitations. The estimated survival rate for 5 years of follow-up was calculated to be 92.25% for the implants. The estimated marginal bone loss after 5 years was calculated to be 1.40 mm. No study reported implant fractures. Conclusions. With the limitations of the present study, there is evidence that 2.5-3.5 mm narrow-diameter implants retaining a removable restoration can be a successful treatment in fully edentulous patients. No data on fixed restorations was available.

scholarly journals A Clinical and Radiographic Evaluation of Zirconia Dental Implants: 10-Year Follow-Up

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Andrea Enrico Borgonovo ◽  
Susanna Ferrario ◽  
Carlo Maiorana ◽  
Virna Vavassori ◽  
Rachele Censi ◽  
...  
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
Clinical Success ◽  
Radiographic Evaluation ◽  
Success Rates ◽  
Marginal Bone Loss ◽  
Single Tooth ◽  
Zirconia Implants

Purpose. The aim is to evaluate the survival and success rates, as well as the marginal bone loss (MBL) and periodontal indexes, of zirconia implants with 10-year follow-up. Materials and Methods. 10 patients were selected and 26 one-piece zirconia implants were used for the rehabilitation of single tooth or partially edentulous ridge. After 10 years, a clinical-radiographic evaluation was performed in order to estimate peri-implant tissue health and marginal bone loss. Results. The survival and success rates were 100%. The average marginal bone loss from baseline to 120 months after surgery was 0.92 ± 0.97 mm. Conclusion. One-piece zirconia dental implants are characterised by high biocompatibility, low plaque adhesion, and absence of microgap that can be related to the clinical success of these implants.

scholarly journals Parameters Associated with Marginal Bone Loss around Implant after Prosthetic Loading

2016 ◽  
Vol 27 (3) ◽  
pp. 292-297 ◽  
Author(s):  
Clarissa D. Koller ◽  
Tatiana Pereira-Cenci ◽  
Noéli Boscato
Keyword(s):  
Survival Rate ◽  
Bone Loss ◽  
Cox Regression ◽  
Prosthetic Design ◽  
Marginal Bone Loss ◽  
Maintenance Program ◽  
Lateral Group ◽  
Single Tooth ◽  
Anterior Guidance

Abstract This study evaluated retrospectively the association among occlusal, periodontal and implant-prosthetic parameters and marginal bone loss (MBL) around implants and survival rate at 5.7 ±3.2 years of follow-up after prosthetic loading. Eighty-two patients received 164 external hexagon implants. After the standard healing period (3 to 6 months), the implants were restored with single-tooth or up to three splinted crowns. All patients were followed according to a strict maintenance program with regular recalls and clinically evaluated by a calibrated examiner. The MBL measurements taken from standardized radiographs made at permanent crown placement (baseline) and after the last evaluation were calculated considering occlusal, periodontal and implant-prosthetic parameters. Veneer fractures and abutment loosening were not considered failure. Two implants failed during the follow-up period, resulting in a survival rate of 98.8%. Cox regression analyses showed MBL associated with non-working side contacts (p=0.047), inadequate anterior guidance (p=0.001), lateral group guidance involving teeth and implants (p=0.015), periimplant plaque index (p=0.035), prosthetic design (p=0.030) and retention (p=0.006). Inadequate occlusal pattern guide, presence of visible plaque, and cemented and splinted implant-supported restoration were associated with greater MBL around the implant.

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 Dental Implants with Different Neck Design: A Prospective Clinical Comparative Study with 2-Year Follow-Up

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1029 ◽  
Author(s):  
Pietro Montemezzi ◽  
Francesco Ferrini ◽  
Giuseppe Pantaleo ◽  
Enrico Gherlone ◽  
Paolo Capparè
Keyword(s):  
Survival Rate ◽  
Bone Loss ◽  
Dental Implants ◽  
Survival Rates ◽  
Marginal Bone Loss ◽  
Probing Depth ◽  
Group A ◽  
Group B ◽  
Wide Neck

The present study was conducted to investigate whether a different implant neck design could affect survival rate and peri-implant tissue health in a cohort of disease-free partially edentulous patients in the molar–premolar region. The investigation was conducted on 122 dental implants inserted in 97 patients divided into two groups: Group A (rough wide-neck implants) vs. Group B (rough reduced-neck implants). All patients were monitored through clinical and radiological checkups. Survival rate, probing depth, and marginal bone loss were assessed at 12- and 24-month follow-ups. Patients assigned to Group A received 59 implants, while patients assigned to Group B 63. Dental implants were placed by following a delayed loading protocol, and cemented metal–ceramic crowns were delivered to the patients. The survival rates for both Group A and B were acceptable and similar at the two-year follow-up (96.61% vs. 95.82%). Probing depth and marginal bone loss tended to increase over time (follow-up: t1 = 12 vs. t2 = 24 months) in both groups of patients. Probing depth (p = 0.015) and bone loss (p = 0.001) were significantly lower in Group A (3.01 vs. 3.23 mm and 0.92 vs. 1.06 mm; Group A vs. Group B). Within the limitations of the present study, patients with rough wide-neck implants showed less marginal bone loss and minor probing depth, as compared to rough reduced-neck implants placed in the molar–premolar region. These results might be further replicated through longer-term trials, as well as comparisons between more collar configurations (e.g., straight vs. reduced vs. wide collars).

scholarly journals Transcrestal Sinus Lift Procedure Approaching Atrophic Maxillary Ridge: A 60-Month Clinical and Radiological Follow-Up Evaluation

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
G. Lo Giudice ◽  
G. Iannello ◽  
A. Terranova ◽  
R. Lo Giudice ◽  
G. Pantaleo ◽  
...  
Keyword(s):  
Survival Rate ◽  
Bone Loss ◽  
Acute Infection ◽  
Survival Rates ◽  
Clinical Results ◽  
Marginal Bone Loss ◽  
Before And After ◽  
Clinical And Radiological Outcome ◽  
Sinus Lifting

Aim.The aim of this study was to assess the success and the survival rate of dental implants placed in augmented bone after sinus lifting procedures.Material and Methods.31 patients were mainly enrolled for a residual upper jaw crest thickness of 3 mm. CBCT scans were performed before and after the augmentation technique and at the follow-up appointments, at 3, 6, 12, 24, and up to 60 months. The follow-up examination included cumulative survival rate of implants, peri-implant marginal bone loss, and the height of sinus floor augmentation.Results.This retrospective study on 31 patients and 45 implants later inserted in a less than 3 mm crest showed excellent survival rates (99.5%), one implant was lost before loading due to an acute infection after 24 days, and two implants did not osteointegrate and were removed after 3 months. The radiological evaluation showed an average bone loss of 0.25 mm (±0.78 mm) at the first follow-up appointment (3 months) up to 0.30 mm (±1.28 mm) after 60-month follow-up.Conclusion.In this study it was reported how even in less than 3 mm thick crest a transcrestal technique can predictably be used with a long-term clinical and radiological outcome, giving patients excellent stability of the grafted material and healthy clinical results.

scholarly journals Outcomes of the rotating hinge knee in revision total knee arthroplasty with a median follow-up of 6.2 years

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Jake von Hintze ◽  
Mika Niemeläinen ◽  
Harri Sintonen ◽  
Jyrki Nieminen ◽  
Antti Eskelinen
Keyword(s):  
Quality Of Life ◽  
Total Knee Arthroplasty ◽  
Survival Rate ◽  
Knee Arthroplasty ◽  
Revision Total Knee Arthroplasty ◽  
Patient Reported ◽  
Total Knee ◽  
Revision Tka

Abstract Background The purpose of this study was to determine the mid-term clinical, radiographic and health-related quality of life (HRQoL) outcomes and define the survival rate in patients who had undergone revision total knee arthroplasty (TKA) using the single rotating hinged knee (RHK) design. Methods Between January 2004 and December 2013, 125 revision TKAs were performed at our institution using the single RHK implant. We conducted both a retrospective analysis of prospectively collected outcome data of these patients and a prospective follow-up study of all 39 living patients (41 knees). The follow-up phase included an optional extra follow-up visit, PROM questionnaires, and plain radiographs. Results The ten-year Kaplan-Meier survival rate of the revision RHK knees was 81.7% (95% CI 71.9–91.6%) with re-revision for any reason as the endpoint. Overall, 15 knees (12% of the total) underwent re-revision surgery during the follow-up. The median follow-up was 6.2 years (range, 0–12.7 years) post-operatively for the baseline group. One mechanical hinge mechanism-related failure occurred without any history of trauma or infection. At the time of the final follow-up, the majority of patients evinced a fairly good clinical outcome measured with patient-reported outcome measures and none of the components were radiographically loose. Conclusion We found that in patients undergoing complex revision TKA, fairly good functional outcome and quality of life can be achieved using an RHK implant. Further, it seems that in this type of patient cohort, revision TKA using an RHK implant relieves pain more than it improves ability to function. The NexGen® RHK design can be regarded as a suitable option in complex revision TKA.

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