Factors and clinical outcomes for standard and mini-implants retaining mandibular overdentures: A systematic review and meta-analysis

Borges, Guilherme; Codello, Denise Juncom; Silva, Letícia Del Rio; Dini, Caroline; Barão, Valentim Adelino Ricardo; Mesquita, Marcelo Ferraz

doi:10.1016/j.prosdent.2021.11.010

Cited by 8 publications

(9 citation statements)

References 43 publications

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“…Mini-implants (MDIs) are one-piece implants and belong to the first and the narrowest category (category 1) of narrow diameter implants (diameter ≤ 2.5 mm) [ 15 ]. The MDIs have been approved as a suitable treatment option for retention of mandibular complete overdentures in subjects with narrow ridges in many follow-up studies [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. A recent study recommended MDIs even for the support of crowns or small bridges in the mandibular incisor region [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Mini-Implants Retaining Removable Partial Dentures in Subjects without Posterior Teeth: A 5-Year Prospective Study Comparing the Maxilla and the Mandible

et al. 2023

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Background and objectives: Long-term studies of clinical outcomes of mini-implants (MDIs) in the first premolar/canine sites retaining a bilateral free-ending removable partial dentures (RPD) in Kennedy class I subjects have not been well documented. The aim was to assess clinical outcomes in a prospective 5-year cohort study comparing the mandible and maxilla. Material and Methods: Participants (n = 92) who received two MDIs each and a new RPD were reviewed after one, three and five years. A total of 71 participants (82 mini-implants in the mandible; 58 in the maxilla) completed the study. Marginal bone level change, success, survival rates, Modified Plaque (MPI) and Bleeding Indices (MBI) were assessed. Results: The five-year success rate was 93.3% and 93.4% (p > 0.05), in the mandible and the maxilla, respectively. Mean peri-implant bone loss (MBL) increased significantly over five years (p < 0.01) to 0.50 mm in the mandible and 0.52 mm in the maxilla. Age had a significant effect on the MBL (higher rates in younger participants), while jaw of insertion, gender, and antagonistic jaw status did not. MPI and MBI were not significantly correlated with MBL. Conclusions: The insertion of two MDIs in previous first premolar/canine sites for retention of a free-end saddle RPD can be a successful treatment modality in subjects with narrow alveolar ridges.

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Section: Introductionmentioning

confidence: 99%

Mini-Implants Retaining Removable Partial Dentures in Subjects without Posterior Teeth: A 5-Year Prospective Study Comparing the Maxilla and the Mandible

et al. 2023

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“…The anatomical limitations of the alveolar ridge, which are related to severe resorptions, may contraindicate conventional implant treatment [ 10 ]; pre-implantation procedures, such as residual ridge augmentation, guided tissue regeneration, vertical distraction osteogenesis or ridge split interventions, may be necessary. The use of MDIs does not require such interventions, and ensures the long-term stabilization of overdentures [ 11 ], as the minimum width required to insert these implants is 4–5 mm [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

The Biomechanical Impact of Loss of an Implant in the Treatment with Mandibular Overdentures on Four Nonsplinted Mini Dental Implants: A Finite Element Analysis

Teodorescu

Preoteasa

et al. 2022

Materials

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The aim of this study was to evaluate the biomechanical impact, in terms of stress and displacement, at the level of a mandibular overdenture, on four mini dental implants (MDIs) after the loss of an implant. A three-dimensional virtual model was obtained by scanning the overdenture, and a biomechanical analysis was carried out, using the finite element method (FEM). The displacements of the overdenture and the equivalent von Mises stresses were evaluated using logarithmic scales. In the case of a mandibular overdenture on four MDIs inserted in the interforaminal area, the frontal loading generated the lowest values for the von Mises stresses, and the bilateral loading generated the least displacement when two implants were inserted in the canine area and two in the molar area. The highest von Mises stress was observed during frontal loading in the situation of the mandibular overdenture on four MDIs, two of which were inserted in the canine area and two in the molar area, following the loss of an implant in the canine area. The largest displacement was noted in the mandibular overdenture on four interforaminal MDIs during unilateral loading, following the loss of a distally inserted implant. The FEM analysis showed aspects that correlated with clinical observations, with predictive value. The concentration of von Mises stresses, and the occurrence of some displacements of the prosthodontic restoration, can explain the emergence of some complications in the overdenture’s biodynamics, and the increased risk of fracture. Complications can be prevented by choosing a certain number of implants and a topographical distribution correlated with biomechanical aspects, and by proposing a correct occlusal scheme with optimal functional loading.

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“…Similar findings were reported by Tomasi et al (2013), who found a mean plaque score of 20%, a mean bleeding on probing of 30%, and a mean probing depth of 2.3 mm at the 12-month follow-up. A systematic review suggested that mini implants have a lower risk of plaque accumulation than standard-diameter implants (Borges et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Implant survival/success and peri‐implant outcomes of titanium‐zirconium mini implants for mandibular overdentures: Results from a 1‐year randomized clinical trial

Curado

Silva

Nascimento

et al. 2023

Clinical Oral Implants Res

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ObjectiveTo report the 1‐year implant survival/success and peri‐implant outcomes of mandibular overdentures retained by four titanium‐zirconium mini implants (Straumann® Mini Implant System), and to assess how surgery and loading protocols influence these outcomes.Materials and MethodsA 2 × 2 factorial randomized clinical trial (RCT) tested the combined effects of two loading protocols (immediate or delayed) and two surgical approaches (flapless or flapped) on the success/survival of the mini implants, and peri‐implant parameters (plaque, bleeding, sulcus depth, gingival position, and marginal bone loss). Outcomes were assessed up to 1‐year after loading, and generalized estimating equations (GEEs) were used to analyze longitudinal and within‐patient clustered data.ResultsTwo hundred and ninety‐six implants were placed in 74 patients. The implant survival/success rates after 1 year were 100%, and no major biological complications were observed. After 1‐year, descriptive data suggest no noticeable changes in plaque scores, whilst a reduction in bleeding scores at the 6‐month and 1‐year follow‐ups compared to baseline. Good longitudinal stability was observed for the probing depth and gingival margin height measures. Overall mean marginal bone loss was 0.68 (±0.68) mm after 3 months and 0.89 (±0.75) mm after 1‐year. The flapless protocol showed better results on soft tissue stability and health but a slightly higher risk for marginal bone loss.ConclusionThe results of this RCT suggest that mandibular overdentures retained by this novel mini implant system represent a safe and predictable treatment option as confirmed by implant survival/success and peri‐implant outcomes, even when flapless surgery and immediate loading protocols are adopted.

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Factors and clinical outcomes for standard and mini-implants retaining mandibular overdentures: A systematic review and meta-analysis

Cited by 8 publications

References 43 publications

Mini-Implants Retaining Removable Partial Dentures in Subjects without Posterior Teeth: A 5-Year Prospective Study Comparing the Maxilla and the Mandible

Mini-Implants Retaining Removable Partial Dentures in Subjects without Posterior Teeth: A 5-Year Prospective Study Comparing the Maxilla and the Mandible

The Biomechanical Impact of Loss of an Implant in the Treatment with Mandibular Overdentures on Four Nonsplinted Mini Dental Implants: A Finite Element Analysis

Implant survival/success and peri‐implant outcomes of titanium‐zirconium mini implants for mandibular overdentures: Results from a 1‐year randomized clinical trial

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