Clinical outcomes of single implant supported crowns versus 3-unit implant-supported fixed dental prostheses in Dubai Health Authority: a retrospective study

Abstract Background This study assessed retrospectively the clinical outcomes of single implant-supported crowns and implant-supported fixed dental prostheses (FDPs). Methods This case series compared biological and technical complications in single implant-supported crowns and implant-supported bridges in a time framed sample of all patients who received dental implants between 2009 and 2016 in Dubai Health Authority. Only 3-unit implant-supported prostheses (FDPs) with one intervening pontic and an implant each end were included for comparison to single crown supported implants. Cantilevered implants, implant-supported dentures and cases involving bone grafts or sinus lifts were excluded. The primary outcome measure was marginal bone loss, measured on digital radiographs taken after prosthesis placement at baseline and one year after implant loading, whilst peri-implantitis and technical complications were secondary outcomes. Mixed regression models adjusted for clustering of implants within patients was used for patient and implant factor associations. Results A total of 454 patients (152 males; 302 females) had 1673 implants. The mean age of males (53.7 years, SD 14.6) was significantly greater than females (49.3 years, SD 12.9, p < 0.001). Mean mesial bone loss on the FDPs was significantly greater at 1 year (1.14 mm, SD 0.63) compared with the mesial surface of single implant-supported crowns (0.30 mm, SD 0.43, p < 0.001). Mean distal bone loss was also significantly greater at 1 year on the distal surfaces of implants supporting bridgework (1.29 mm, SD 0.71) compared with distal surfaces on single implant-supported crowns (0.36 mm, SD 0.54, p < 0.001). Mean marginal bone loss mesially and distally around implants placed in the lower anterior sextant was significantly greater compared to all other sites (p < 0.001). Bone loss by gender, patient’s age and medical condition was not different between the 2 implant groups. Screw loosening was the main technical complication (11.5%) whilst peri-implantitis occurred rarely (0.5%). The 66 cement retained implants had significantly more complications compared to the 1607 screw retained implants (p < 0.001). Conclusions Mean marginal bone loss around the supporting implants of FDPs (3-unit fixed bridgework) was greater than on single implant-supported crowns at one year after implant loading. Position in the mouth was associated with bone loss. Biological and technical complications occurred rarely.

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Very low certainty in evidence suggesting that there are no differences in failure rate and marginal bone loss between tilted and straight implants supporting fixed dental prostheses

The Journal of the American Dental Association ◽

10.1016/j.adaj.2018.12.006 ◽

2019 ◽

Vol 150 (4) ◽

pp. e47

Author(s):

Romina Brignardello-Petersen

Keyword(s):

Bone Loss ◽

Failure Rate ◽

Marginal Bone Loss ◽

Dental Prostheses ◽

Fixed Dental Prostheses

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The Influence of Prosthesis Design on the Outcomes of Tooth Implants Immediately Placed and Loaded by Means of One-Piece Titanium Machined Restoration

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-17-00152 ◽

2018 ◽

Vol 44 (2) ◽

pp. 87-93 ◽

Cited By ~ 3

Author(s):

Paolo Toti ◽

Simone Marconcini ◽

Giammarinaro Enrica ◽

Giorgio Pedretti ◽

Antonio Barone ◽

...

Keyword(s):

Bone Loss ◽

Dental Implants ◽

Survival Rates ◽

Autogenous Bone ◽

Marginal Bone Loss ◽

Dental Prostheses ◽

Posterior Maxilla ◽

Significant Difference ◽

Sinus Lifting ◽

Fixed Dental Prostheses

Our purpose was to evaluate the occurrence of complications and the degree of bone loss in a cohort of patients treated with fixed prostheses supported by immediately loaded dental implants. The primary aim was to compare partial versus full-arch fixed dental prostheses. We then tested the effect of sinus lifting. In the present retrospective cohort study, the patients had their implants restored with fixed dental prostheses supported by dental implants positioned in the posterior maxilla and mandible. When necessary, the maxillary sinuses were grafted with particulate autogenous bone. Patients were then ranked according to the following predictors: length of prosthesis, crown-to-implant ratio, number of crowns to number of implants ratio, and presence of sinus lifting. Outcomes were evaluated for up to 2 years regarding the peri-implant marginal bone loss and implant/prosthesis survival rates. Fifty-eight subjects (209 implants) were rehabilitated with 25 fixed full-arch prostheses and 33 partial fixed dental implant bridges (16 supported by implants placed in grafted sinus). The mean marginal bone loss for implants supporting partial fixed dental prostheses amounted to 0.81 mm, whereas that for implants within the group of full-arch fixed dental prostheses was 1.21 mm; the comparison of the levels in the 2 groups showed a significant difference (P = .0055). A statistically significant difference (P = .0006) was found between the bone loss around maxillary implants (1.53 mm) and the bone loss around mandibular implants (1.10 mm). Two implants and 4 prostheses failed; 2-year survival rates of partial and of full-arch fixed dental prostheses, respectively, were 94.1% and 96%. Bone loss in full-arch prostheses appeared to be higher than in that of partial prosthesis. Implant-supported prostheses in the maxillae exhibited a bone loss higher than that registered in mandibles.

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Implant failure and marginal bone loss of tilted implants in comparison with straight implants supporting fixed dental prostheses: a systematic review and meta-analysis

International Journal of Pharmaceutical Research ◽

10.31838/ijpr/2020.12.03.259 ◽

2020 ◽

Vol 12 (03) ◽

Keyword(s):

Systematic Review ◽

Bone Loss ◽

Meta Analysis ◽

Implant Failure ◽

Marginal Bone Loss ◽

Dental Prostheses ◽

Fixed Dental Prostheses

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Aesthetic Outcomes and Peri-Implant Health of Angled Screw Retained Implant Restorations Compared with Cement Retained Crowns: Medium Term Follow-Up

Journal of Functional Biomaterials ◽

10.3390/jfb12020035 ◽

2021 ◽

Vol 12 (2) ◽

pp. 35

Author(s):

Livia Nastri ◽

Ludovica Nucci ◽

Vincenzo Grassia ◽

Rino Miraldi

Keyword(s):

Bone Loss ◽

Functional Results ◽

Technical Solution ◽

Marginal Bone Loss ◽

Single Tooth ◽

Natural Teeth ◽

The Aesthetic ◽

Single Implant ◽

Single Tooth Implant

Single tooth implant restorations in the aesthetic area are a demanding challenge. If a complete osseointegration is mandatory, the final result has to result in a higher standard of biomimetic and soft tissue health among natural teeth. This outcome is traditionally pursued by cementing crowns over individualized abutments. However, in recent years, the need for controlling peri-implant health and the preference towards a retrievable solution has led to an increase in screw-retained crowns, which is not always applicable when the implant axis is not ideal. In the aesthetic area, the use of a novel technical solution represented by the angled screw channel (ASC) of the abutment has been proposed in order to match the advantages of the screwed solution with the aesthetic demands. The aim of this study was to compare ASC crowns to cemented crowns (CC) in single implant restorations using the white esthetic score (WES) and pink esthetic score (PES) at the crown delivery and at a follow-up of a minimum of 2 years. Peri-implant health and marginal bone loss (MBL) were also evaluated. The mean follow-up was 44.3 months, with a mean MBL of 0.22 mm in the ASC group and 0.29 mm in the CC group. The total WES/PES score was 16.6 for ASC, compared with 17.3 for CC at baseline, and 16.2 and 17.1, respectively, at follow-up. Both of the groups reached a high WES/PES, and this was maintained over time, without signs of peri-implant diseases or bone loss, regardless of the choice of connection. In conclusion, ASC can be adopted in cases where the implant axis is not ideal, with aesthetic and functional results that are comparable to implants restored by cemented crowns.

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

International Journal of Implant Dentistry ◽

10.1186/s40729-021-00392-1 ◽

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.

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After 10 Years Seven out of Ten Fixed Dental Prostheses (FDP) Remain Intact and Nine out of Ten FDPs Remain in Function Following Biological and Technical Complications That Have Been Repaired

Journal of Evidence Based Dental Practice ◽

10.1016/j.jebdp.2009.11.019 ◽

2010 ◽

Vol 10 (1) ◽

pp. 39-40 ◽

Cited By ~ 5

Author(s):

Asbjorn Jokstad

Keyword(s):

Dental Prostheses ◽

Technical Complications ◽

Fixed Dental Prostheses

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Marginal bone loss one year after implantation: a systematic review of different loading protocols

International Journal of Oral and Maxillofacial Surgery ◽

10.1016/j.ijom.2019.03.965 ◽

2020 ◽

Vol 49 (1) ◽

pp. 121-134 ◽

Cited By ~ 2

Author(s):

M. Sommer ◽

J. Zimmermann ◽

L. Grize ◽

S. Stübinger

Keyword(s):

Systematic Review ◽

Bone Loss ◽

Marginal Bone Loss ◽

One Year

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Factors Influencing Early Marginal Bone Loss around Dental Implants Positioned Subcrestally: A Multicenter Prospective Clinical Study

Journal of Clinical Medicine ◽

10.3390/jcm8081168 ◽

2019 ◽

Vol 8 (8) ◽

pp. 1168 ◽

Cited By ~ 6

Author(s):

Teresa Lombardi ◽

Federico Berton ◽

Stefano Salgarello ◽

Erika Barbalonga ◽

Antonio Rapani ◽

...

Keyword(s):

Clinical Study ◽

Bone Loss ◽

Final Analysis ◽

Prospective Clinical Study ◽

Marginal Bone Loss ◽

Insertion Depth ◽

Mucosal Thickness ◽

Implant Loading ◽

Ceramic Restorations ◽

Time Point

Early marginal bone loss (MBL) is a non-infective remodeling process of variable entity occurring within the first year after implant placement. It has a multifactorial etiology, being influenced by both surgical and prosthetic factors. Their impact remains a matter of debate, and controversial information is available, particularly regarding implants placed subcrestally. The present multicenter prospective clinical study aimed to correlate marginal bone loss around platform-switched implants with conical connection inserted subcrestally to general and local factors. Fifty-five patients were enrolled according to strict inclusion/exclusion criteria by four clinical centers. Single or multiple implants (AnyRidge, MegaGen, South Korea) were inserted in the posterior mandible with a one-stage protocol. Impressions were taken after two months of healing (T1), screwed metal-ceramic restorations were delivered three months after implant insertion (T2), and patients were recalled after six months (T3) and twelve months (T4) of prosthetic loading. Periapical radiographs were acquired at each time point. Bone levels were measured at each time point on both mesial and distal aspects of implants. Linear mixed models were fitted to the data to identify predictors associated with MBL. Fifty patients (25 male, 25 female; mean age 58.0 ± 12.8) with a total of 83 implants were included in the final analysis. The mean subcrestal position of the implant shoulder at baseline was 1.24 ± 0.57 mm, while at T4, it was 0.46 ± 0.59 mm under the bone level. Early marginal bone remodeling was significantly influenced by implant insertion depth and factors related to biological width establishment (vertical mucosal thickness, healing, and prosthetic abutment height). Deep implant insertion, thin peri-implant mucosa, and short abutments were associated with greater marginal bone loss up to six months after prosthetic loading. Peri-implant bone levels tended to stabilize after this time, and no further marginal bone resorption was recorded at twelve months after implant loading.

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