Influence of short implants geometry on primary stability

González‐Serrano, José; Molinero‐Mourelle, Pedro; Pardal-Peláez, Beatriz; Sáez-Alcaide, Luis-Miguel; Ortega, Rosa; López-Quiles, Juan

doi:10.4317/medoral.22378

Cited by 7 publications

(8 citation statements)

References 26 publications

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“…In this context, the modifications on the implant macrostructure have been developed to facilitate the achievement of primary stability in these sites ( 7 - 9 ). Parameters such as the connection, thread, and platform design have been improved, making it possible to place implants in borderline conditions ( 5 , 8 ).…”

Section: Introductionmentioning

confidence: 99%

In vitro evaluation of the influence of bone cortical thickness on the primary stability of conventional- and short-sized implants

Barros¹,

Silva²,

Camargos³

et al. 2022

J Clin Exp Dent

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Background The aim of this in vitro study was to evaluate the influence of the cortical thickness on the primary stability of short and conventional-sized implants with two types of prosthetic connection. Material and Methods Seventy-two implants were used. These implants were placed in polyurethane blocks that simulated low-density bone tissue (type IV bone), with two bone cortical heights (type I bone): 1mm and 3mm. The implants were divided into 6 groups with 12 implants each according to the type of prosthetic connections (external-hexagon -EH and morse taper- MT) and implant sizes (conventional- 4x10mm and short 5x5mm; 5.5x5mm; 5x6mm; 5.5x6mm). Insertion torque (IT) and resonance frequency analyzes (RFA) were performed to evaluate the primary stability of the implants. Results All implants installed in blocks with 3mm of cortical thickness showed greater IT than those installed in 1mm. The short-sized MT implants had a higher IT than conventional implants of the same connection. Short-sized EH implants showed less IT than short-sized MT implants in blocks with 3mm of cortical. In blocks with 1mm of cortical, conventional EH implants had a higher IT compared to short-sized EH implants. The conventional sized implants presented higher RFA values despite the thickness of the cortical in the blocks. Conclusions The greater bone cortical thickness and implants size provides greater primary stability of the implants regardless the prosthetic connection. Key words: Implants connection, implants macrostructure, primary stability.

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Section: Introductionmentioning

confidence: 99%

In vitro evaluation of the influence of bone cortical thickness on the primary stability of conventional- and short-sized implants

Barros¹,

Silva²,

Camargos³

et al. 2022

J Clin Exp Dent

View full text Add to dashboard Cite

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“…Although it may not be clinically relevant to test short implants in a large bone height, this eliminates the risk of having to perform bone augmentation procedures, with possible complications, in the control group with longer implants. One could hypothesize, with short implants it is more challenging to obtain initial stability than with longer implants, possibly resulting in early implant loss (de Oliveira et al, 2016;González-Serrano et al, 2018). However, to the authors' knowledge, there are no randomized controlled clinical trials in which short implants are compared with longer implants without the combination of an augmentation procedure in the posterior region of maxilla and mandible.…”

Section: Introductionmentioning

confidence: 99%

Comparison of 6‐mm and 11‐mm dental implants in the posterior region supporting fixed dental prostheses: 5‐year results of an open multicenter randomized controlled trial

Guljé

Meijer

Abrahamsson

et al. 2020

Clinical Oral Implants Res

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ObjectiveThe aim of this multicenter, randomized controlled trial was to compare the clinical and radiographic outcomes of 6‐mm or 11‐mm implants, placed in the posterior maxilla and mandible, during a 5‐year follow‐up period.Materials and methodsNinety‐five patients with adequate bone height for 11‐mm implants, were randomly allocated to a 6‐mm group (test group with short implants) or an 11‐mm group (control group with standard‐length implants). Two or three implants of the same length were placed in each patient and after 6 weeks loaded with a splinted provisional restoration. This was followed by definitive splinted restoration 6 months after implant placement. Clinical and radiographic parameters, including the occurrence of complications were recorded.ResultsA total of 49 patients were enrolled to receive 6‐mm implants (n = 108) and 46 patients to receive 11‐mm implants (n = 101). Three implants (two of 6 mm and one of 11 mm in length) were lost before loading and one 6‐mm implant after 15 months of function, and one 11‐mm implant was lost during the first year of function. The 5‐year survival rates were 96.0% and 98.9% in the 6‐mm and 11‐mm group, respectively. The mean marginal bone level changes 5 years post‐loading were 0.01 ± 0.45 mm (bone gain) in the 6‐mm group and −0.12 ± 0.93 mm (bone loss) in the 11‐mm group (p = .7670). Clinical parameters, including plaque, bleeding on probing and pocket probing depth were not significantly different between the groups, and also technical complications were low.ConclusionThe clinical and radiographic outcomes of 6‐mm short and 11‐mm standard‐length implants were not different during a 5‐year evaluation period.

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“…In addition, low quality bone is known to be the determinant factor for SI success, as it compromises primary stability at placement (11). The short implant models used had bicortical anchorage, which may have favored the stress values observed.…”

Section: Discussionmentioning

confidence: 99%

“…Despite the favorable results of SI, the disadvantages include a lower implant surface area, leading to a smaller bone/implant interface that increases the stress concentration on bone (9). However, currently, implant surface treatment and implant geometry modifications have improved the SI performance (10,11).…”

Section: Introductionmentioning

confidence: 99%

Different Treatment Modalities Using Dental Implants in the Posterior Maxilla: A Finite Element Analysis

Bordin¹,

Castro

Carvalho

et al. 2021

Braz. Dent. J.

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The objective of this study was to compare the biomechanical behavior of peri-implant bone tissue and prosthetic components in two modalities of treatment for posterior region of the maxilla, using short implants or standard-length implants associated with bone graft in the maxillary sinus. Four 3D models of a crown supported by an implant fixed in the posterior maxilla were constructed. The type of implant: short implant (S) or standard-length implant with the presence of sinus graft (L) and type of crown retention: cemented (C) or screwed (S) were the study factors. The models were divided into SC- cemented crown on a short implant; SS- screwed crown on the short implant; LC- cemented crown on a standard-length implant after bone graft in the maxillary sinus and LS- crown screwed on a standard-length implant after bone graft in the maxillary sinus. An axial occlusal loading of 300 N was applied, divided into five points (60N each) corresponding to occlusal contact. The following analysis criteria were observed: Shear Stress, Maximum and Minimum Main Stress for bone tissue and von Mises Stress for the implant and prosthetic components. The use of standard-length implants reduced the shear stress in the cortical bone by 35.75% and the medullary bone by 51% when compared to short implants. The length of the implant did not affect the stress concentration in the crown, and the cement layer acted by reducing the stresses in the ceramic veneer and framework by 42%. Standard-implants associated with cemented crowns showed better biomechanical behavior.

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Influence of short implants geometry on primary stability

Cited by 7 publications

References 26 publications

In vitro evaluation of the influence of bone cortical thickness on the primary stability of conventional- and short-sized implants

In vitro evaluation of the influence of bone cortical thickness on the primary stability of conventional- and short-sized implants

Comparison of 6‐mm and 11‐mm dental implants in the posterior region supporting fixed dental prostheses: 5‐year results of an open multicenter randomized controlled trial

Different Treatment Modalities Using Dental Implants in the Posterior Maxilla: A Finite Element Analysis

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