Measurement of the Correlation of Implant Stability Quotient with Abutment Length for a Bone Anchored Hearing Implant System

As immediate loading protocols are becoming more frequent, the primary stability of implants has become an essential criterion for the osseointegration of dental implants. Based on this, the objective of this study was to understand the influence of different undersized surgical preparation sites on the insertion torque (IT) and implant stability quotient (ISQ). Four different site-preparation protocols were performed on fresh humid type III bovine bone: one control, the standard protocol recommended by the manufacturer (P1), and three variations of undersized techniques (P2, P3 and P4). The implant used was VEGA by Klockner Implant System. The sample size was n = 40 for each of the four groups. A torquemeter was used to measure the IT, and the ISQ was measured with a Penguin RFA. Both variables showed a tendency to increase as the preparation technique was reduced, although not all the values were statistically significant (p < 0.05) when comparing with the standard preparation. The preparations without a cortical drill, P2 and P4, showed better results than those with a cortical drill. Given the limitations of this study, it can be concluded that reducing the implant preparation can increase both the IT and ISQ. Removing the cortical drill is an effective method for increasing implant stability, although it should be used carefully.

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Correlation between Insertion Torque and Implant Stability Quotient in Tapered Implants with Knife-Edge Thread Design

BioMed Research International ◽

10.1155/2018/7201093 ◽

2018 ◽

Vol 2018 ◽

pp. 1-7 ◽

Cited By ~ 23

Author(s):

Domenico Baldi ◽

Teresa Lombardi ◽

Jacopo Colombo ◽

Gabriele Cervino ◽

Giuseppe Perinetti ◽

...

Keyword(s):

Torque Control ◽

Pairwise Comparisons ◽

Insertion Torque ◽

Knife Edge ◽

Implant Stability ◽

Implant Stability Quotient ◽

Significant Difference ◽

High Torque ◽

Low Torque ◽

Implant System

Aim. To evaluate the correlation between insertion torque (IT) and implant stability quotient (ISQ) in tapered implants with knife-edge threads.Methods. Seventy-five identical implants (Anyridge, Megagen) were inserted by using a surgical drilling unit with torque control and an integrated resonance frequency analysis module (Implantmed, W&H). IT (N/cm) and ISQ were recorded and implants were divided into three groups (n=25) according to the IT: low (<30), medium (30 < IT < 50), and high torque (>50). ISQ difference among groups was assessed by Kruskal-Wallis test, followed by Bonferroni-corrected Mann–WhitneyU-test for pairwise comparisons. The strength of the association between IT and ISQ was assessed by Spearman Rho correlation coefficient (α=0.05).Results. At the pairwise comparisons, a significant difference of ISQ values was demonstrated only between low torque and high torque groups. The strength of the association between IT and ISQ value was significant for both the entire sample and the medium torque group, while it was not significant in low and high torque groups.Conclusions. For the investigated implant, ISQ and IT showed a positive correlation up to values around 50 N/cm: higher torques subject the bone-implant system to unnecessary biological and mechanical stress without additional benefits in terms of implant stability. This trial is registered withNCT03222219.

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Influence of Implant Dimensions and Position on Implant Stability: A Prospective Clinical Study in Maxilla Using Resonance Frequency Analysis

Applied Sciences ◽

10.3390/app9050860 ◽

2019 ◽

Vol 9 (5) ◽

pp. 860 ◽

Cited By ~ 4

Author(s):

Antonio Nappo ◽

Carlo Rengo ◽

Giuseppe Pantaleo ◽

Gianrico Spagnuolo ◽

Marco Ferrari

Keyword(s):

Resonance Frequency ◽

Dental Implant ◽

Frequency Analysis ◽

Primary Stability ◽

Prospective Clinical Study ◽

Resonance Frequency Analysis ◽

Implant Stability ◽

Implant Stability Quotient ◽

Implant Placement ◽

Implant System

Implant stability is relevant for the correct osseointegration and long-term success of dental implant treatments. The aim of this study has been to evaluate the influence of implant dimensions and position on primary and secondary stability of implants placed in maxilla using resonance frequency analysis. Thirty-one healthy patients who underwent dental implant placement were enrolled for the study. A total of 70 OsseoSpeed TX (Astra Tech Implant System—Dentsply Implants; Mölndal, Sweden) implants were placed. All implants have been placed according to a conventional two-stage surgical procedure according to the manufacturer instructions. Bone quality and implant stability quotient were recorded. Mean implant stability quotient (ISQ) at baseline (ISQ1) was statistically significant lower compared to 3-months post-implant placement (ISQ2) (p < 0.05). Initial implant stability was significantly higher with 4 mm diameter implants with respect to 3.5 mm. No differences were observed within maxilla regions. Implant length, diameter and maxillary regions have an influence on primary stability.

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Is It Possible to Monitor Implant Stability on a Prosthetic Abutment? An In Vitro Resonance Frequency Analysis

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17114073 ◽

2020 ◽

Vol 17 (11) ◽

pp. 4073

Author(s):

Paula López-Jarana ◽

Carmen María Díaz-Castro ◽

Artur Falcão ◽

Blanca Ríos-Carrasco ◽

Ana Fernandez-Palacín ◽

...

Keyword(s):

Resonance Frequency ◽

Frequency Analysis ◽

Mean Value ◽

Resonance Frequency Analysis ◽

Implant Stability ◽

Implant Stability Quotient ◽

The Mean ◽

The One ◽

Implant System

In order to apply the “one-abutment–one-time” concept, we evaluated the possibility of measuring resonance frequency analysis (RFA) on the abutment. This trial aimed to compare the Implant Stability Quotient (ISQ) values obtained by the PenguinRFA when screwing the transducer onto the implant or onto abutments with different heights and angulations. Eighty implants (VEGA®, Klockner Implant System, SOADCO, Les Escaldes, Andorra) were inserted into fresh bovine ribs. The groups were composed of 20 implants, 12 mm in length, with two diameters (3.5 and 4 mm). Five different abutments for screwed retained restorations (Permanent®) were placed as follows: straight with 1, 2, and 3 mm heights, and angulated at 18° with 2 and 3 mm heights. The mean value of the ISQ measured directly on the implant was 75.72 ± 4.37. The mean value of the ISQ registered over straight abutments was 79.5 ± 8.50, 76.12 ± 6.63, and 71.42 ± 6.86 for 1, 2, and 3 mm height abutments. The mean ISQ over angled abutments of 2 and 3 mm heights were 68.74 ± 4.68 and 64.51 ± 4.53 respectively. The present study demonstrates that, when the ISQ is registered over the straight abutments of 2 and 3 mm heights, the values decrease, and values are lower for angled, 3 mm height abutments.

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Assessment of healing of dental implant surgical site following Low-Level Laser Therapy using Bio-Clinical parameters: An Exploratory Study

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-18-00316 ◽

2020 ◽

Author(s):

VARSHA PALLED ◽

DR. JITENDRA RAO ◽

DR. RAGHUWAR DAYAL SINGH ◽

DR. SHUCHI TRIPATHI ◽

DR. KALPANA SINGH ◽

...

Keyword(s):

Laser Therapy ◽

Test Group ◽

Low Level Laser Therapy ◽

Control Group ◽

Clinical Parameters ◽

Implant Stability ◽

Low Level ◽

Implant Stability Quotient ◽

Low Level Laser ◽

Level Laser

The purpose of this study was to evaluate whether Low-Level Laser Therapy (LLLT) improves the healing of the implant surgical site with clinical and biochemical parameters.Thirty patients with an edentulous space spanning a single tooth were selected. The patients were randomly allocated to two groups - the control group and the test group. The test group received laser energy at a power of 2J/cm 2 with a total of 4-6J energy over each implant. Clinical parameters (Implant Stability Quotient, probing index, modified sulcus bleeding index)and osteoprotegerin (OPG) were assessed at baseline and follow-up intervals (2 weeks, 6 weeks, and 3 months).The test group showed significantly higher implant stability quotient compared to thecontrol group at 2 weeks(57.93±3.95 and 35.67±3.08; p<0.01) and 3months(58.86±3.75 and 67.06±3.78; p<0.01). A significant rise in OPG levels of the test group(686.30±125.36pg/ml at baseline and 784.25±108.30pg/ml at 3months;p<0.01) was seen contrary to significant decline in the control group (839.50±249.08pg/ml at baseline,415.30±78.39pg/ml at 3months;p<0.01). Within the limitations of the study, the study suggests that the healing of peri-implant hard and soft tissues may be enhanced with the use of LLLT as an explicit modality during the post-operative period.

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Primary Stability of Short Implants Inserted Using Piezoelectric or Drilling Systems: An In Vitro Comparison

Journal of Oral Implantology ◽

10.1563/aaid-joi-18-00157 ◽

2019 ◽

Vol 45 (4) ◽

pp. 259-266

Author(s):

Claudio Stacchi ◽

Matteo De Biasi ◽

Lucio Torelli ◽

Massimo Robiony ◽

Roberto Di Lenarda ◽

...

Keyword(s):

Cancellous Bone ◽

Operative Time ◽

Primary Stability ◽

Site Preparation ◽

Preparation Technique ◽

Implant Stability ◽

Implant Stability Quotient ◽

Custom Made ◽

Implant Site Preparation

The primary objective of the present in vitro study was to evaluate the influence of implant site preparation technique (drills vs ultrasonic instrumentation) on the primary stability of short dental implants with two different designs inserted in simulated low-quality cancellous bone. Eighty implant sites were prepared in custom-made solid rigid polyurethane blocks with two different low cancellous bone densities (5 or 15 pounds per cubic foot [PCF]), equally distributed between piezoelectric (Surgysonic Moto, Esacrom, Italy) and conventional drilling techniques. Two short implant systems (Prama and Syra, Sweden & Martina) were tested by inserting 40 fixtures of each system (both 6.0 mm length and 5.0 mm diameter), divided in the four subgroups (drills/5 PCF density; drills/15 PCF density; piezo/5 PCF density; piezo/15 PCF density). Insertion torque (Ncm), implant stability quotient values, removal torque (Ncm), and surgical time were recorded. Data were analyzed by 3-way ANOVA and Scheffé's test (α = 0.05). With slight variations among the considered dependent variables, overall high primary implant stability was observed across all subgroups. Piezoelectric instrumentation allowed for comparable or slightly superior primary stability in comparison with the drilling procedures in both implant systems. The Prama implants group showed the highest mean reverse torque and Syra implants the highest implant stability quotient values. Piezoelectric implant site preparation took prolonged operative time compared to conventional preparation with drills; among the drilling procedures, Syra system required fewer surgical steps and shorter operative time.

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Analysis of correlation between hounsfield units of CBCT scans and implant primary stability in implant stability quotient (ISQ)

Clinical Oral Implants Research ◽

10.1111/clr.182_13358 ◽

2018 ◽

Vol 29 ◽

pp. 297-297

Author(s):

Alexandre Campos Montenegro ◽

Mario Vieira Neto ◽

Gonçalo Pimentel Neto ◽

Silvana Pizzini Montenegro ◽

Kamila Temponi ◽

...

Keyword(s):

Primary Stability ◽

Implant Stability ◽

Hounsfield Units ◽

Implant Stability Quotient

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Developing Stability of Posterior Mandibular Implants Placed With Osteotome Expansion Technique Compared With Conventional Drilling Techniques

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-16-00101 ◽

2017 ◽

Vol 43 (2) ◽

pp. 131-138 ◽

Cited By ~ 1

Author(s):

Yen-Ting Lin ◽

Adrienne Hong ◽

Ying-Chin Peng ◽

Hsiang-Hsi Hong

Keyword(s):

Bone Density ◽

Surgical Techniques ◽

Primary Stability ◽

Conventional Technique ◽

Implant Stability ◽

Implant Stability Quotient ◽

Expansion Technique ◽

The Stability ◽

Conventional Drilling ◽

Secondary Stability

Clinical decisions regarding the stability and osseointegration of mandibular implants positioned using the bone expansion techniques are conflicting and limited. The objective was to evaluate the stability of implants placed using 2 surgical techniques, selected according to the initial width of the mandibular posterior edentulous ridge, with D3 bone density, during a 12-week period. Fifty-eight implants in 33 patients were evaluated. Thirty-two implants in 24 patients were positioned using the osteotome expansion technique, and 26 fixtures in 17 patients were installed using the conventional drilling technique. The implant stability quotient values were recorded at weeks 0, 1, 2, 3, 4, 6, 8, 10, and 12 postsurgery and evaluated using analysis of variance, independent, and paired t tests. Calibrated according to the stability reading of a 3.3-mm diameter implant, the osteotome expansion group was associated with a lower bone density than the conventional group (64.96 ± 6.25 vs 68.98 ± 5.06, P = .011). The osteotome expansion group achieved a comparable primary stability (ISQb-0, P = .124) and greater increases in secondary stability (ISQb-12, P = .07) than did the conventional technique. A D3 quality ridge with mild horizontal deficiency is expandable by using the osteotome expansion technique. Although the 2 groups presented similar implant stability quotient readings during the study period, the osteotome expansion technique showed significant improvement in secondary stability. The healing patterns for these techniques are therefore inconsistent.

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Influence of formalin fixation on the implant stability quotient and mechanical characteristics of bone

British Journal of Oral and Maxillofacial Surgery ◽

10.1016/j.bjoms.2012.08.009 ◽

2013 ◽

Vol 51 (6) ◽

pp. 550-554 ◽

Cited By ~ 11

Author(s):

Koji Morita ◽

Kazuya Doi ◽

Hiroshi Oue ◽

Shiho Kajihara ◽

Kazuhiko Hayashi ◽

...

Keyword(s):

Mechanical Characteristics ◽

Formalin Fixation ◽

Implant Stability ◽

Implant Stability Quotient

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Long-Term Outcomes of the Minimally Invasive Ponto Surgery vs. Linear Incision Technique With Soft Tissue Preservation for Installation of Percutaneous Bone Conduction Devices

Frontiers in Neurology ◽

10.3389/fneur.2021.632987 ◽

2021 ◽

Vol 12 ◽

Author(s):

Ruben M. Strijbos ◽

Louise V. Straatman ◽

Tim G. A. Calon ◽

Martin L. Johansson ◽

Arthur J. G. de Bruijn ◽

...

Keyword(s):

Quality Of Life ◽

Soft Tissue ◽

Bone Conduction ◽

Tissue Preservation ◽

Implant Stability ◽

Implant Stability Quotient ◽

Incision Technique

Objective: Comparing the surgical outcomes of the Minimally Invasive Ponto Surgery (MIPS) technique with the linear incision technique with soft tissue preservation (LITT-P) for bone conduction devices after a follow-up of 22 months.Methods: In this multicenter randomized controlled trial, there was the inclusion of 64 adult patients eligible for unilateral surgery. There was 1:1 randomization to the MIPS (test) or the LITT-P (control) group. The primary outcome was an (adverse) soft tissue reaction. Secondary outcomes were pain, loss of sensibility, soft tissue height/overgrowth, skin sagging, implant loss, Implant Stability Quotient measurements, cosmetic scores, and quality of life questionnaires.Results: Sixty-three subjects were analyzed in the intention-to-treat population. No differences were found in the presence of (adverse) soft tissue reactions during complete follow-up. Also, there were no differences in pain, wound dehiscence, skin level, soft tissue overgrowth, and overall quality of life. Loss of sensibility (until 3-month post-surgery), cosmetic scores, and skin sagging outcomes were better in the MIPS group. The Implant Stability Quotient was higher after the LITT-P for different abutment lengths at various points of follow-up. Implant extrusion was nonsignificantly higher after the MIPS (15.2%) compared with LITT-P (3.3%).Conclusion: The long-term results show favorable outcomes for both techniques. The MIPS is a promising technique with some benefits over the LITT-P. Concerns regarding nonsignificantly higher implant loss may be overcome with future developments and research.Clinical Trial Registration:www.ClinicalTrials.gov, identifier: NCT02438618.

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