Clinical, radiographic, and immunological evaluation of angulated screw‐retained and cemented single‐implant crowns in the esthetic region: A 1‐year randomized controlled clinical trial

Lv, Xiaolei; Qian, Shu‐Jiao; Qiao, Shuqing; Gu, Yun; Lai, Hong-Chang; Shi, Junyu

doi:10.1111/cid.13035

Cited by 11 publications

(14 citation statements)

References 31 publications

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“…Implants were placed to support a screw-retained prosthesis. The effect of prosthetic solutions that may compensate up several degrees of axial discrepancy 27,28 and, subsequently, reduce the need for bone augmentation was not assessed. After virtual implant placement was completed, additional bone augmentation was deemed necessary when a minimum of 1 mm of circumferential bone support was not observed around the whole implant fixture.…”

Section: Discussionmentioning

confidence: 99%

Alveolar ridge preservation reduces the need for ancillary bone augmentation in the context of implant therapy

Couso‐Queiruga

Mansouri

Alade

et al. 2022

Journal of Periodontology

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Background There is limited information on the need for bone augmentation in the context of delayed implant placement whether alveolar ridge preservation (ARP) is previously performed or not. The primary aim of this retrospective cohort study was to evaluate the efficacy of ARP therapy after tooth extraction compared with unassisted socket healing (USH) in reducing the need for ancillary bone augmentation before or at the time of implant placement. Methods Adult subjects that underwent non‐molar single tooth extraction with or without simultaneous ARP therapy were included in this study. Cone beam computed tomography scans obtained before tooth extraction and after a variable healing period were used to record the baseline facial bone thickness and to virtually plan implant placement according to a standard method. A logistic regression model was used to evaluate the effect of facial alveolar bone thickness upon tooth extraction and baseline therapy (USH or ARP) on the need for additional bone augmentation, adjusting for several covariates (i.e., age, sex, baseline KMW, and tooth type). Results One hundred and forty subjects that were equally distributed between both baseline therapy groups constituted the study population. Implant placement was deemed virtually feasible in all study sites. Simultaneous bone augmentation was considered necessary in 60% and 11.4% of the sites in the USH and ARP group, respectively. Most of these sites (64.2% in the USH group and 87.5% in the ARP group) exhibited a thin facial bone phenotype (<1 mm) at baseline. Logistic regression revealed that the odds of not needing ancillary bone augmentation were 17.8 times higher in sites that received ARP therapy. Furthermore, the need for additional bone augmentation was reduced 7.7 times for every 1 mm increase in facial bone thickness, regardless of baseline therapy. Conclusions Based on a digital analysis, ARP therapy, compared with USH, and thick facial alveolar bone largely reduce the need for ancillary bone augmentation at the time of implant placement in non‐molar sites.

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Section: Discussionmentioning

confidence: 99%

Alveolar ridge preservation reduces the need for ancillary bone augmentation in the context of implant therapy

Couso‐Queiruga

Mansouri

Alade

et al. 2022

Journal of Periodontology

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“…Only a few in vivo reports have reported on these restorations, and their results hint that this system can provide satisfying success and survival rates, even if at short follow-ups [21,29].…”

Section: Discussionmentioning

confidence: 99%

The Application of Angulated Screw-Channels in Metal-Free, Implant-Supported Restorations: A Retrospective Survival Analysis

et al. 2021

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Angulated screw channels (ASC) allow the clinician to reposition the access hole of screw-retained restorations, improving the design of the rehabilitation and the esthetic outcome. Few clinical studies are available on the efficacy of these restorations, especially at longer follow-ups and with a large number of subjects. The objective of this study was therefore to retrospectively evaluate patients rehabilitated with screw-retained restorations using ASC. The time of delivery and their adherence to the maintenance program was obtained, as well as the characteristics of the restoration and of the patient’s occlusion; a Kaplan–Meier survival curve was then built to investigate the success rate of these restorations and the effects of several variables were evaluated with a Cox model. A total of 105 subjects and 162 implants were enrolled in this study; after 42 months a success rate (92%) similar to what is reported for conventional screw-retained restorations was encountered. Monolithic zirconia restorations (n = 52) had a higher success rate (95%) when compared to partially veneered restorations (n = 53), which suffered a higher number of complications (90%). The other variables had no statistically significant effect. Implant supported prostheses adopting ASC provide a favorable outcome both in the posterior and anterior regions and can therefore be adopted to treat cases where the implant angulation is unfavorable for a conventional screw-retained prosthesis.

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“…In vitro studies have found that ASC crowns would fail under the bite force exceeding physical chewing force, 8,17,20 it in line with previous clinical trials. 21,[30][31][32] No significantly different PES was found between RC group and ASC group (RC: 9.88 ± 2.11 vs ASC: 10.63 ± 3.49, p = 0.555). It indicates that ASC abutment (Nobel Biocare) has the same aesthetic effect with the RC abutment.…”

Section: Radiographic Assessmentmentioning

confidence: 99%

“…19 It was confirmed that ASC abutment have similar clinical acceptable effects as regular cemented abutment during short-term follow-up, 20 although the concentration of TNF-α in peri-implant crevicular fluid in the ASC group was significantly higher than regular cemented group while the bleeding of probe rate (BOP%) was lower in the ASC group. 21 Professor Friberg has revealed that there were only 0.41 mm marginal bone loss (MBL) in 1-year follow-up. 22 And a recent study showed that ASC crowns have comparable aesthetic and functional results after 44.3 months follow-up.…”

Section: Introductionmentioning

confidence: 99%

Clinical effect of Nobel Biocare angulated screw channel crown compared with cement crown in the aesthetic area: A retrospective cohort study with a mean 32 months follow‐up (range 12 to 70 months)

Yang,

Xu,

Jiang

et al. 2023

Clin Implant Dent Rel Res

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ObjectiveThe objective of this study is to compare the clinical efficacy of angulated screw channel abutment applied in the anterior area with regular cemented crowns.Materials and MethodsForty‐eight patients were included and divided into two groups: the angulated screw channel group (ASC) and regular cemented group (RC) in this retrospective cohort study. The evaluation criteria included implant/restoration survival rate, keratinized mucosa width (KMW), bleeding on probing rate (BOP%), probing depth (PD), pink aesthetic score (PES), mechanical/biological complications, emergence angle (EA), the site of implant axis penetrate (SA), marginal bone loss (MBL), and buccal bone thickness (BBT) at 0 mm, 1 mm, 3 mm, 5 mm below the implant shoulder were evaluated in immediate postoperative (T0) and follow‐up period (T1).ResultsThis retrospective cohort study included a total of 48 patients, with a mean 32 months follow‐up period range from 12 months to 70 months. The study did not find any cases of implant failure or restoration failure. EA was significantly wider in the RC group than ASC group (RC: 33.53° ± 8.36° vs ASC: 27.43° ± 8.08°, p = 0.016*). While the BOP% was statistically significant higher in the RC group than ASC group (RC: 28.35% ± 22.92% vs ASC: 13.18% ± 20.00%, p = 0.027*). No significant differences were observed in the other measurements of comparison.ConclusionWithin the limitations of the study, angulated screw channel (Nobel Biocare) crowns might allow the implant axis aim at incisal edge to reduce the emergence angle in the anterior area and benefit the soft‐tissue during the 12–70 months follow‐up period.

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Clinical, radiographic, and immunological evaluation of angulated screw‐retained and cemented single‐implant crowns in the esthetic region: A 1‐year randomized controlled clinical trial

Cited by 11 publications

References 31 publications

Alveolar ridge preservation reduces the need for ancillary bone augmentation in the context of implant therapy

Alveolar ridge preservation reduces the need for ancillary bone augmentation in the context of implant therapy

The Application of Angulated Screw-Channels in Metal-Free, Implant-Supported Restorations: A Retrospective Survival Analysis

Clinical effect of Nobel Biocare angulated screw channel crown compared with cement crown in the aesthetic area: A retrospective cohort study with a mean 32 months follow‐up (range 12 to 70 months)

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