Randomized controlled clinical trial comparing two dental implants with different neck configurations

Sanz‐Martín, Ignacio; Sanz‐Sánchez, Ignacio; Noguerol, Fernando; Cok, Susy; Ortiz‐Vigón, Alberto; Sanz, Mariano

doi:10.1111/cid.12482

Cited by 16 publications

(29 citation statements)

References 45 publications

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“…The two studies that reported patient‐based MBL changes (Astrand, Engquist, Anzen, et al, ; Sanz‐Martín et al, ) corroborated the findings by presenting a null mean difference between implants with transmucosal collar and two‐piece implants.…”

Section: Resultsmentioning

confidence: 72%

“…Astrand et al reported peri‐implantitis in 5% of the transmucosal implants. Sanz‐Martín et al () reported the same number of implants affected with peri‐implantitis in both groups.…”

Section: Resultsmentioning

confidence: 89%

“…In two trials (Akoglu et al, ; Astrand, Engquist, Anzen, et al, ), BoP affected no more than 10% of all implants and no differences were found between groups at baseline or any other follow‐up. Sanz‐Martín et al, reported slightly higher BoP but also with no differences between groups. Although Sanz‐Martín et al () reported no differences in PD at 1 year of follow‐up, Akoglu et al () reported higher mean PD for the two‐piece implants after 5 years (Table ).…”

Section: Resultsmentioning

confidence: 91%

“…Sanz‐Martín et al, reported slightly higher BoP but also with no differences between groups. Although Sanz‐Martín et al () reported no differences in PD at 1 year of follow‐up, Akoglu et al () reported higher mean PD for the two‐piece implants after 5 years (Table ). Astrand et al reported peri‐implantitis in 5% of the transmucosal implants.…”

Section: Resultsmentioning

confidence: 91%

“…Within the cohorts analysed, three major interventions (or types of screw-type dental implants) categories could be identified regarding the implant neck design, as pictured in Figure S1: Eight full texts reported on one-piece transmucosal and two-piece implants, representing seven different studies since two of these were consecutive reports of the same cohort of patients Astrand, Engquist, Anzen, et al, 2004). These included a total of F I G U R E 2 Author's assessment of risk of bias of included studies 711 implants at baseline, and in five cases, the comparison was established with two-piece implants with machined neck (Astrand, Engquist, Anzen, et al, 2004, Burtscher et al, 2015, Sanz-Martín et al 2017, Shin et al, 2006, van Eekeren, Tahmaseb, & Wismeijer, 2016 and in two other cases with two-piece implants with rough collar (Akoglu et al, 2011;Fernandez-Formoso et al, 2012). Shin et al (2006) included a second comparison group with rough collar implants with microthreads.…”

Section: Referencementioning

confidence: 99%

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Titanium dental implants with different collar design and surface modifications: A systematic review on survival rates and marginal bone levels

Messias

Nicolau

Guerra

2018

Clinical Oral Implants Res

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Aim The aim of this study was to compare clinical and radiographic outcomes of dental implants with different neck characteristics. Methods A protocol‐oriented search aimed at the question: “In patients subjected to tooth replacement with screw‐type dental implants does the modification of the implant neck macro‐ or microgeometry contribute to the improvement of survival rates and maintenance of the peri‐implant marginal bone levels?” Primary outcomes were survival and marginal bone level (MBL) changes evaluated on randomized controlled trials with >10 participants and follow‐up >1 year. Risk of bias was evaluated using the Cochrane Collaboration's tool. The review follows the PRISMA statement. Results Forty‐three studies compared: (a) One‐ versus two‐piece implants (N = 7); (b) Two‐piece implants with different neck characteristics (machined and rough collars, microthreads, LASER microtexturing) (N = 21); (c) Two‐piece implants with macrogeometry modifications (tapering, back‐tapering, and scalloping) (N = 6). One‐ and two‐piece implants showed similar survival (RR = 0.45, 95% CI: [0.12, 1.66], p = 0.23) and MBL changes (WMD = 0.09 mm, 95% CI: [−0.27, 0.45], p = 0.64) at 1‐year post‐loading. Machined collar implants have higher risk of early failure than rough collar implants (RR = 3.96, 95% CI: [1.12, 13.93], p = 0.03) and 0.43 mm higher bone resorption (95% CI: [0.0, 0.86], p = 0.05). Microthreads (WMD = 0.07 mm, 95% CI: [−0.01, 0.15], p = 0.10) and LASER microtexturing (WMD = 0.15 mm, 95% CI: [−0.35, 0.65], p = 0.56) do not reduce bone resorption. Scalloped implants have 1.26 mm higher resorption (95% CI: [0.72, 2.00], p < 0.001). Conclusions One‐ and two‐piece implants have similar survival and MBL changes. Rough collar implants have lower MBL changes than machined collar implants. Additional modifications to rough collars are irrelevant.

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Section: Resultsmentioning

confidence: 72%

“…Astrand et al reported peri‐implantitis in 5% of the transmucosal implants. Sanz‐Martín et al () reported the same number of implants affected with peri‐implantitis in both groups.…”

Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 91%

Section: Referencementioning

confidence: 99%

See 3 more Smart Citations

Titanium dental implants with different collar design and surface modifications: A systematic review on survival rates and marginal bone levels

Messias

Nicolau

Guerra

2018

Clinical Oral Implants Res

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The effect of a convergent transmucosal neck on soft tissues and radiographic outcomes: a 1-year follow-up randomized controlled trial

et al. 2023

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Purpose The aim of this randomized controlled clinical trial was to evaluate peri-implant marginal bone levels (MBLs) and soft tissue dimension changes 1 year after loading. Patients in the control group received bone-level implants, whereas in the test group, tissue-level implants with a convergent transmucosal neck were used. Material and methods MBLs were calculated by measuring the distance from the implant shoulder to the first visible bone-to-implant contact using standardized periapical digital radiographs. Baseline (day of loading) and follow-up digital models obtained with an intraoral scanner were used to quantify the changes in the peri-implant soft tissue dimensions with a best-fit algorithm. Results The difference between final and baseline MBLs showed a mean bone loss of 0.16 ± 0.01 mm in the test group (n = 15) and 0.45 ± 0.09 mm in the control group (n = 14) (p > 0.05). Soft tissue contour at the level of the gingival margin (GM) increased by 1.96 ± 2.69 mm in the test group and 0.65 ± 0.42 mm in the control group (p = 0.167). Both groups showed a coronal displacement of the gingival margin with no significant differences among them. Conclusions The present study demonstrated peri-implant hard and soft tissues stability at both implant designs with no significant differences 12 months after loading. Clinical relevance There is still insufficient scientific evidence to demonstrate the role and advantages of the convergent transmucosal neck on the behavior of the peri-implant soft and hard tissues stability compared to a straight neck in bone-level implants 12 months after loading.

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Marginal bone loss around bone-level and tissue-level implants: A systematic review and meta-analysis

Taheri

Akbari

Shamshiri

et al. 2020

Annals of Anatomy - Anatomischer Anzeiger

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Randomized controlled clinical trial comparing two dental implants with different neck configurations

Abstract: Both types of implant reported high survival rates and similar bone level changes, clinical parameters, and patient related outcomes after 12 months of loading.

Cited by 16 publications

References 45 publications

Titanium dental implants with different collar design and surface modifications: A systematic review on survival rates and marginal bone levels

Titanium dental implants with different collar design and surface modifications: A systematic review on survival rates and marginal bone levels

The effect of a convergent transmucosal neck on soft tissues and radiographic outcomes: a 1-year follow-up randomized controlled trial

Marginal bone loss around bone-level and tissue-level implants: A systematic review and meta-analysis

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