Influence of smoking upon dental implant osseointegration: a radiofrequency analysis of 194 implants

2020 ◽  
Author(s):  
Javier Badenes ◽  
Antonio Pallarés
Keyword(s):  
Dental Implant ◽  
Marked Decrease ◽  
Primary Stability ◽  
Insertion Torque ◽  
Implant Stability ◽  
Marginal Bone Loss ◽  
Age And Gender ◽  
Potential Impact ◽  
And Gender ◽  
Secondary Stability

While many studies have related smoking to periimplantitis and marginal bone loss, little is known of its potential impact upon dental implant osseointegration. The present clinical study explores the influence of smoking upon secondary stabilization based on radiofrequency analysis. A total of 194 implants in 114 patients were included. Implant stability was evaluated on the day of surgery and a minimum of 90 days after implantation, when osseointegration is considered to have been completed. The evolution of implant stability was compared between two groups: smokers versus non-smokers. The following variables were also analyzed: implant brand, model, length and diameter, insertion torque, bone density according to the Misch classification, location of the implant, and patient age and gender. The results showed that smoking does not affect primary stability of the implant, though it was associated to a marked decrease in secondary stability. The non-smokers showed a gain of 2.69 points (95%CI: 1.529 to 3.865) in the osseointegration process with respect to the smokers (p<0.001). Among the latter, implant stability was seen to decrease 0.91 points (95%CI: -3.424 to 1.600) (p<0.004), generating a difference of 3.61 points between smokers and non-smokers. Smoking is thus concluded to be an important factor that must be taken into account when seeking good implant osseointegration outcomes.

scholarly journals New Implant Design with Midcrestal and Apical Wing Thread for Increased Implant Stability in Single Postextraction Maxillary Implant

2019 ◽  
Vol 2019 ◽  
pp. 1-4 ◽  
Author(s):  
Antonio Scarano ◽  
Bartolomeo Assenza ◽  
Francesco Inchingolo ◽  
Filiberto Mastrangelo ◽  
Felice Lorusso
Keyword(s):  
Cortical Bone ◽  
Dental Implant ◽  
Alveolar Bone ◽  
Primary Stability ◽  
Implant Design ◽  
Insertion Torque ◽  
Fixture Design ◽  
Implant Stability ◽  
Implant Placement ◽  
Immediate Placement

Background. The immediate placement of a dental implant could represent an option treatment for the rehabilitation of a postextractive missing tooth socket to replace compromised or untreatable teeth, with the advantage of single-session surgery. In this way, the anatomy of the alveolar bone defect, the preservation of the buccal cortical bone, and the primary stability of the fixture represent the critical factors that consent a precise implant placement. Objective. This case report describes a novel fixture design for postextractive alveolar socket immediate implant. Methods. Two patients (25 and 31 years old) were treated for postextractive dental implant placement to replace both central upper incisor teeth with four implants. The residual bone implant gap was not filled with graft or bone substitute. The restoration was provided following a standard loading protocol by a cement-sealed prosthetic abutment. Results. Clinically, all implants positioned showed an excellent insertion torque. No postoperative complications were reported. At 6 months of healing, the buccal cortical bone and the implant stability were present and well maintained. Conclusion. The evidence of this study allows us to underline the possible advantages of this new fixture design for postextractive implant technique.

scholarly journals Primary Stability Optimization by Using Fixtures with Different Thread Depth According To Bone Density: A Clinical Prospective Study on Early Loaded Implants

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2398 ◽  
Author(s):  
Christian Makary ◽  
Abdallah Menhall ◽  
Carole Zammarie ◽  
Teresa Lombardi ◽  
Seung Yeup Lee ◽  
...  
Keyword(s):  
Bone Density ◽  
Primary Stability ◽  
Stability Loss ◽  
Insertion Torque ◽  
Implant Stability ◽  
Marginal Bone Loss ◽  
Early Loading ◽  
Bone Level ◽  
Implant Therapy ◽  
Provisional Restoration

Background: Macro- and micro-geometry are among the factors influencing implant stability and potentially determining loading protocol. The purpose of this study was to test a protocol for early loading by controlling implant stability with the selection of fixtures with different thread depth according to the bone density of the implant site. Materials and Methods: Patients needing implant therapy for fixed prosthetic rehabilitation were treated by inserting fixtures with four different thread diameters, selected based on clinical assessment of bone quality at placement (D1, D2, D3, and D4, according to Misch classification). Final insertion torque (IT) and implant stability quotient (ISQ) were recorded at baseline and ISQ measurements repeated after one, two, three, and four weeks. At the three-week measurement (four weeks after implant replacement), implants with ISQ > 70 Ncm were functionally loaded with provisional restorations. Marginal bone level was radiographically measured 12 months after implant insertion. Results: Fourteen patients were treated with the insertion of forty implants: Among them, 39 implants showing ISQ > 70 after 3 weeks of healing were loaded with provisional restoration. Mean IT value was 82.3 ± 33.2 Ncm and varied between the four different types of bone (107.2 ± 35.6 Ncm, 74.7 ± 14.0 Ncm, 76.5 ± 31.1 Ncm, and 55.2 ± 22.6 Ncm in D1, D2, D3, and D4 bone, respectively). Results showed significant differences except between D2 and D3 bone types. Mean ISQ at baseline was 79.3 ± 4.3 and values in D1, D2, D3, and D4 bone were 81.9 ± 2.0, 81.1 ± 1.0, 78.3 ± 3.7, and 73.2 ± 4.9, respectively. Results showed significant differences except between D1 and D2 bone types. IT and ISQ showed a significant positive correlation when analyzing the entire sample (p = 0.0002) and D4 bone type (p = 0.0008). The correlation between IT and ISQ was not significant when considering D1, D2, and D3 types (p = 0.28; p = 0.31; p = 0.16, respectively). ISQ values showed a slight drop at three weeks for D1, D2, and D3 bone while remaining almost unchanged in D4 bone. At 12-month follow-up, all implants (39 early loading, 1 conventional loading) had satisfactory function, showing an average marginal bone loss of 0.12 ± 0.12 mm, when compared to baseline levels. Conclusion: Matching implant macro-geometry to bone density can lead to adequate implant stability both in hard and soft bone. High primary stability and limited implant stability loss during the first month of healing could allow the application of early loading protocols with predictable clinical outcomes.

scholarly journals Does the systemic administration of l-arginine affect dental implant stability in nicotine consumer dogs?

2021 ◽  
Vol 43 (1) ◽  
Author(s):  
Bijan Movahedian ◽  
Mansour Rismanchian ◽  
Hooman Navaei ◽  
Saeid Tavanafar ◽  
Soheil Koushaei
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
Primary Stability ◽  
Insertion Torque ◽  
Implant Stability ◽  
Consumer Group ◽  
Value Analysis ◽  
Significant Difference ◽  
Group 2 ◽  
Arginine Supplementation

Abstract Background Nicotine can have detrimental effects on dental implant osseointegration. This study aimed to evaluate the influence of systemic l-arginine supplement on the osseointegration of dental implants in nicotine consumer dogs. Methods Twelve 1-year Labrador Retriever dogs had their right and left third and fourth mandibular premolars removed, and the sockets were left to heal for 6 months. Dogs were randomly divided into three groups (n = 16): group 1—0.2 mg/kg nicotine was injected twice daily; group 2—0.2 mg/kg nicotine was injected twice daily in addition to 200 mg/kg l-arginine capsules taken orally; and group 3—placebo. Forty-eight dental implants were inserted into the healed sockets of the dog’s mandible and were assessed by implant stability quotient (ISQ) using resonance frequency analysis (RFA) during 4 weeks and insertion and removal torque value analysis. Results No implant failure occurred during the study period. The change in torque value between insertion and removal was similar in the placebo and nicotine+arginine consumer dogs (p = 0.276), which shows a positive effect of arginine supplementation in nicotine consumers. There was a significant difference in torque value change between nicotine+arginine vs. nicotine consumers (p = 0.049) and placebo vs. nicotine (p = 0.003). After 4 weeks, the placebo had the most significant improvement in torque value (47.0 ± 16.9), followed by nicotine+arginine (25.1 ± 37.8), and the worst torque value was for the nicotine group (− 5.7 ± 24.0) pound per inch. The results show that except in the first week, there are significant differences in ISQ between the groups in different periods. ISQ in all of the groups has reduced at first but then increased over time. At the time of implant placement, insertion torque was significantly higher in the nicotine consumer group than the nicotine+arginine consumer group and placebo group (p = 0.020). Conclusion Arginine supplementation promotes bone healing and implant primary stability by improving dental implant osseointegration biomechanical characteristics.

scholarly journals Implant Stability in the Posterior Maxilla: A Controlled Clinical Trial

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Raquel Zita Gomes ◽  
Mario Ramalho de Vasconcelos ◽  
Isabel Maria Lopes Guerra ◽  
Rute Alexandra Borges de Almeida ◽  
Antonio Cabral de Campos Felino
Keyword(s):  
Primary Stability ◽  
Controlled Clinical Trial ◽  
Insertion Torque ◽  
Success Rates ◽  
Implant Stability ◽  
Native Bone ◽  
Posterior Maxilla ◽  
Group A ◽  
Group B ◽  
Secondary Stability

Aim. To evaluate the primary and secondary stability of implants in the posterior maxilla. Methods. Patients were allocated into three groups: (A) native bone, (B) partially regenerated bone, and (C) nearly totally regenerated bone. Insertion torque (IT) and implant stability quotient (ISQ) were measured at placement, to evaluate whether satisfactory high primary stability (IT ≥ 45 N/cm; ISQ ≥ 60) was achieved; ISQ was measured 15, 30, 45, and 60 days after placement, to investigate the evolution to secondary stability. Results. 133 implants (Anyridge®, Megagen) were installed in 59 patients: 55 fixtures were placed in Group A, 57 in Group B, and 21 in Group C. Fifty-two implants had satisfactory high primary stability (IT ≥ 45 N/cm; ISQ ≥ 60). A positive correlation was found between all variables (IT, ISQ at t = 0, t = 60), and statistically higher IT and ISQ values were found for implants with satisfactory high primary stability. Significant differences were found for IT and ISQ between the groups (A, B, and C); however, no drops were reported in the median ISQ values during the healing period. Conclusions. The evaluation of the primary and secondary implant stability may contribute to higher implant survival/success rates in critical areas, such as the regenerated posterior maxilla. The present study is registered in the ISRCTN registry with ID ISRCTN33469250.

scholarly journals Relation Between Insertion Torque and Implant Stability Quotient: A Clinical Study

2021 ◽  
Author(s):  
João Paulo do Vale Souza ◽  
Clóvis Lamartine de Moraes Melo Neto ◽  
Lucas Tavares Piacenza ◽  
Emily Vivianne Freitas da Silva ◽  
André Luiz de Melo Moreno ◽  
...  
Keyword(s):  
Tooth Extraction ◽  
Primary Stability ◽  
Insertion Torque ◽  
Resonance Frequency Analysis ◽  
Implant Stability ◽  
Significance Level ◽  
Positive Correlation ◽  
Implant Stability Quotient ◽  
Implant Placement ◽  
Secondary Stability

Abstract Objectives This study aimed to assess the relation between the insertion torque and implant stability quotient (ISQ recorded immediately and 6 months after implant placement). Materials and Methods Twenty-five patients over the age of 18 years were selected for this study. One implant was placed per patient after tooth extraction. The implant site needed 15 mm in height and 8 mm in width. All implants had the same size (11.5 × 3.75 mm) and brand (Hexagonal Morse cone, DSP Biomedical). The insertion torque (Ncm) and resonance frequency analysis (ISQ value) (Osstell Mentor) were used to assess the primary stability (on the day of surgery). After 6 months, ISQ value was used to assess the secondary stability of each implant. Statistical Analysis The insertion torque data were correlated with ISQ measurements by using Pearson’s correlation. The significance level was 5%. Results There was a positive correlation between insertion torque and initial ISQ (correlation: 0.457; p = 0.022); however, no correlation was found between insertion torque and final ISQ (p = 0.308). Conclusion The present study demonstrated that there is a positive correlation between the insertion torque and the initial ISQ. Therefore, the higher the insertion torque, the higher the initial ISQ (or vice versa).

scholarly journals Comparative radiographic and resonance frequency analyses of the peri-implant tissue after dental implants placement using flap and flapless techniques: An experimental study on domestic pigs

2013 ◽  
Vol 70 (6) ◽  
pp. 586-594 ◽  
Author(s):  
Zoran Vlahovic ◽  
Branko Mihailovic ◽  
Zoran Lazic ◽  
Mileta Golubovic
Keyword(s):  
Bone Resorption ◽  
Resonance Frequency ◽  
Dental Implants ◽  
Dental Implant ◽  
Surgical Techniques ◽  
Primary Stability ◽  
Implant Stability ◽  
Domestic Pigs ◽  
Flap Technique ◽  
Implant Placement

Background/Aim. Flapless implant surgery has become very important issue during recent years, mostly thanks to computerization of dentistry and software planning of dental implants placements. The aim of this study was to compare flap and flapless surgical techniques for implant placement through radiographic and radiofrequency analyses. Methods. The experiment was made in five domestic pigs. Nine weeks following domestic pigs teeth extraction, implants were placed, on the right side using surgical technique flap, and flapless on the left side. Digital dental Xrays were applied to determine primary dental implant stability quality (ISQ). At certain intervals, not later than three months, the experimental animals were sacrificed, and just before it, control X-rays were applied to measure dental implants stability. Results. Radiographic analysis showed that peri-implant bone resorption in the first 4 weeks following placement implants with flap and flapless surgical techniques was negligible. After the 3 months, mean value of peri-implant bone resorption of the implants placed using flap technique was 1.86 mm, and of those placed using flapless technique was 1.13 mm. In relation to the primary dental implant stability in the first and second week there was an expected decrease in ISQ values, but it was less expressed in the dental implants placed using the flapless technique. In the third week the ISQ values were increased in the dental implants placed by using both techniques, but the increase in flapless implant placement was higher (7.4 ISQ) than in flap implant placement (1.5 ISQ). The upward trend continued in a 4- week period, and after 3 months the dental implant stability values in the implants placed using flap technique were higher than the primary stability for 7.1 ISQ, and in the implants placed using flapless technique were higher comparing to the primary stability for 10.1 ISQ units. Conclusion. Based on the results of radiographic and resonance frequency analyses it can be concluded that the flapless technique in surgical implants placemat, leads to better results.

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

2017 ◽  
Vol 43 (2) ◽  
pp. 131-138 ◽  
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.

scholarly journals Influence of Insertion Torque on Clinical and Biological Outcomes before and after Loading of Mandibular Implant-Retained Overdentures in Atrophic Edentulous Mandibles

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Fernanda Faot ◽  
Amália Machado Bielemann ◽  
Alessandra Julie Schuster ◽  
Raissa Micaella Marcello-Machado ◽  
Altair Antoninha Del Bel Cury ◽  
...  
Keyword(s):  
Clinical Outcomes ◽  
Dental Implants ◽  
Survival Rates ◽  
Rank Correlation ◽  
Primary Stability ◽  
Insertion Torque ◽  
Success Rates ◽  
Implant Stability ◽  
Before And After ◽  
Edentulous Patients

Aim. To evaluate the influence of primary insertion torque (IT) values of narrow dental implants on the peri-implant health, implant stability, immunoinflammatory responses, bone loss, and success and survival rates. Methods. Thirty-one edentulous patients received two narrow implants (2.9x10mm, Facility NeoPoros) to retain mandibular overdentures. The implants were categorized in four groups according to their IT: (G1) IT > 10 Ncm; (G2) IT ≥ 10Ncm and ≤ 30 Ncm; (G3) IT >30Ncm and < 45Ncm; (G4) IT ≥ 45Ncm, and all implants were loaded after 3 months of healing. The following clinical outcomes were evaluated 1, 3, 6, and 12 months after implant insertion: (i) peri-implant tissue health (PH), gingival index (GI), plaque index (PI), calculus presence (CP), probing depth (PD), and bleeding on probing (BOP); (ii) implant stability quotient (ISQ) by resonance frequency analysis; and (iii) IL-1β and TNF-α concentration in the peri-implant crevicular fluid. The marginal bone level (MBL) and changes (MBC) were evaluated. The Chi2 test, Kruskal-Wallis test, mixed-effects regression analysis, and the Kendall rank correlation coefficient were used for statistical analysis (α = 5%). Results. G1 presented the highest PD at all evaluated periods. G2 presented higher PI at month 6 and 12. G4 showed increased GI at month 3 and 12 and more CP at month 1 (p=.003). G2 and G4 had higher ISQ values over the study period, while those from G1 and G3 presented lower ISQ values. The IL-1β concentration increased until month 12 and was independent of IT and bone type; G4 had a higher IL-1β concentration in month 3 than the other groups (p=.015). The TNF-α release was negatively correlated with IT, and TNF-α release was highest in G1 at month 12. The MBL immediately after surgery and the MBC at month 12 were similar between the groups, and G4 presented a positive MBC at month 12. The survival and success rates were 75% for G1, 81.3% for G2, 64.3% for G3, and 95% for G4. Conclusion. The IT did not influence the clinical outcomes and the peri-implant immunoinflammatory responses and was weakly correlated with the narrow dental implants primary stability. The observed success rates suggest that the ideal IT for atrophic fully edentulous patients may deviate from the standardized IT of 32 Ncm.

scholarly journals Effects of Different Undersizing Site Preparations on Implant Stability

2020 ◽  
Vol 17 (23) ◽  
pp. 8965
Author(s):  
Bernardo Ferreira Lemos ◽  
Paula Lopez-Jarana ◽  
Carlos Falcao ◽  
Blanca Ríos-Carrasco ◽  
Javier Gil ◽  
...  
Keyword(s):  
Primary Stability ◽  
Immediate Loading ◽  
Insertion Torque ◽  
Bovine Bone ◽  
Preparation Technique ◽  
Standard Protocol ◽  
Implant Stability ◽  
Implant Stability Quotient ◽  
Surgical Preparation ◽  
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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