Aug 2026· European Journal of Dentistry· 0 citations· 44 references
Medicine
TL;DR
The dissociation between insertion torque and 90-day stability indicates that secondary stability is governed by factors beyond initial mechanical engagement, and suggests a potential long-term biomechanical difference warranting further study.
Abstract
Abstract Objective This randomized clinical trial aimed to assess the relation of insertion torque value (ITV) and implant stability quotient (ISQ) between bone-level (BL) and tissue-level (TL) dental implants (ISQ recorded immediately and 3 months after implant placement). Materials and Methods A total of 90 dental implants (44 BL, 46 TL; BioHorizons Camlog, Iberica) were placed in 21 patients. ITV was recorded at placement. ISQ (Penguin device, Klockner) was measured horizontally (ISQ-H) and vertically (ISQ-V) at baseline and at the 90-day follow-up. Statistical analysis The Mann–Whitney U test and Spearman's correlation tests (α = 0.05) were used for the analyses. Results No significant difference in ITV was found between the BL (36.0 ± 11.5 Ncm) and TL (38.0 ± 11.5 Ncm) groups ( p = 0.381). Similarly, no significant differences were observed in baseline ISQ-H ( p = 0.928) or ISQ-V ( p = 0.874). At 90 days, ISQ-H values were marginally higher in the TL group (66.5 ± 20.9) compared to the BL group (57.1 ± 18.9; p = 0.029). A significant positive correlation was found between ITV and baseline ISQ ( r = 0.493, p < 0.001), but not with 90-day ISQ values. Conclusions Implant design (BL vs. TL) did not significantly influence ITV or ISQ. The finding of greater horizontal stability for TL implants at 90 days, while marginal, suggests a potential long-term biomechanical difference warranting further study. The dissociation between insertion torque and 90-day stability indicates that secondary stability is governed by factors beyond initial mechanical engagement.
Neither the choice of drilling technique nor the implant macrogeometry significantly influences insertion torque or stability levels in regions of low bone density in this randomized controlled clinical study.
Worood A Akram, S. Bede· The Journal of craniofacial...· 0 citations
Marginal bone preservation around osseointegrated dental implants continues to represent a critical challenge in modern implant dentistry. To address this issue, subcrestal implant placement along the apico-coronal axis has been proposed as a reliable clinical strategy aimed at reducing the risk of implant thread exposure within the oral environment. In the present study, 38 healthy patients were treated with either bone-level implants (BLG-Control) or implants positioned 2 mm subcrestally (SCG-Test). All implants featured an internal conical connection and a platform-switching design. In addition, implants in the test group were restored using an immediate tissue-level abutment following the one-time abutment (OTA) protocol. Marginal bone modifications (MBMs) were evaluated through standardized radiographic examinations performed at surgery (T0), implant loading (T1), and after 6 (T2), 12 (T3), 24 (T4), and 36 (T5) months of functional loading. MBMs, meaning the overall changes in the radiographic bone structure over time, were categorized as bone loss (BL) when occurring apical to the implant neck, and as bone remodeling (BR) when detected coronally to the implant neck. Clinical parameters, including probing pocket depth (PPD), bleeding on probing (BoP), and plaque index (PI), were also recorded and analyzed throughout the follow-up period. At the 36-month evaluation, mean MBM values were 0.61 mm for the test group and 0.58 mm for the control group. After three years of follow-up, the test group demonstrated a mean PPD of 2.03 mm, compared with 2.78 mm in the control group. Bleeding on probing was recorded at 13% in the test group and 11% in the control group, while plaque index values were 11% and 5%, respectively. Within the limitations of the present investigation, implants placed 2 mm subcrestally and characterized by an internal conical connection combined with platform switching demonstrated favorable clinical and radiographic outcomes over a short- to medium-term observation period of three years. When compared with equicrestally positioned implants, the subcrestal approach seemed to favor the peri-implant hard tissue conditions while reducing the possibility of marginal bone loss below the implant neck. However, one should bear in mind that this clinical behavior applies specifically to the investigated implant design and should be interpreted within the limitations of the present study.
M. Mensi, E. Scotti, S. Calza et al.· Applied Sciences· 0 citations
It is demonstrated that PISP achieves comparable biomechanical stability to OD, establishing its clinical feasibility for immediate molar implant placement in anatomically complex posterior regions.
Hussien El H Hassan, Abdelaziz F Khlalil, Dina M N Metawie· BMC Oral Health· 1 citation
BACKGROUND
Short dental implants are a less invasive alternative for the limited posterior mandible, but their early stability dynamics remain unclear compared to standard implants.
PURPOSE
This prospective, non-randomized observational pilot study aimed to explore and descriptively compare early stability patterns (primary stability, stability dip, and recovery) between 7 mm short implants and 11 mm standard shallow-thread implants in the posterior mandible, treating implant length as the only design variable.
MATERIALS AND METHODS
Ten patients received 20 implants (10 short, 10 standard) based on anatomical feasibility. Implant stability quotient (ISQ) was measured immediately post-implant placement (T0) and at the end weeks 1, 2, 3, and 5 (T1-T4). Insertion torque (ITV) was recorded. Linear mixed models (LMM) with patient random intercepts were the primary analysis. Bonferroni correction (α=0.005) was applied for 10 post-hoc comparisons. Bone density (D2/D3) by calibrated CBCT-HU.
RESULTS
Primary stability (ITV and ISQ at T0) was similar between groups. Short implants showed nominal trends toward a larger dip magnitude (9.2±4.4 vs 5.9±2.3 ISQ units) and greater recovery (4.8±2.4 vs 2.6±2.2), but after Bonferroni correction none of the between-group comparisons at individual time points or intervals remained statistically significant (all p > 0.005). Bone density (D2 vs D3) had a statistically significant and clinically dominant effect on absolute ISQ at all times (LMM p<0.001). In the short-implant group, a moderate negative correlation between baseline ISQ and dip magnitude (r≈0.54) had wide confidence intervals that crossed zero and did not reach conventional statistical significance, and is therefore considered exploratory.
CONCLUSIONS
Within the constraints of this small, nonrandomized pilot, 7-mm shallow-thread implants in D2-D3 bone demonstrated primary stability that was descriptively similar to 11-mm implants. Apparent differences in dip and recovery did not remain statistically significant after correction for multiple comparisons and should be interpreted as hypothesis-generating only. However, bone density exerted a greater influence on early ISQ than implant length. These observations provide effect-size estimates and testable hypotheses for future adequately powered randomized trials rather than practice-changing guidance.
Mohammad Abdulwahab Abdullah Al-Jonaid, Ali Al-Hudaid, Abdulwahab Al-Dailmy et al.· The International Journal of...· 0 citations
STA significantly increased STT but did not prevent buccal bone remodelling, and both augmentation approaches were associated with increased STT compared with no augmentation.
Louiza Papantonatou, L. Batas, A. Delantoni et al.· Journal of Clinical Periodon...· 0 citations
Introduction: This study aimed to compare implant stability and crestal bone loss between titanium platelet-rich fibrin (T-PRF)-treated implants and conventional implants. Methods: A prospective, randomized, split-mouth clinical trial was conducted in 10 healthy patients, with 20 implants per mouth (test and control). Each patient received one T-PRF-treated implant and one conventional implant. Implant stability was assessed using implant stability quotient (ISQ) at placement and at 3 months. Crestal bone loss was evaluated radiographically at 3 and 6 months. Soft tissue parameters were assessed at follow-up visits. Results: The T-PRF group showed higher ISQ values and reduced bone loss, with trends favoring the intervention at the three-month follow-up compared with the control group. Bone loss at three and six months was lower around anterior implants in the T-PRF group than in the control group. At this time, T-PRF may help improve soft tissue measurements; however, the measured values did not differ significantly from those of the control groups. Due to limitations such as a small sample size, a relatively short follow-up period, and varying baseline crestal bone levels, these findings should be interpreted with caution. Conclusion: Due to the restrictions of this split-mouth study, T-PRF-treated sites showed a trend towards increased early implant stability and decreased crestal bone loss compared to control sites. However, because of the small sample size and short follow-up period, conclusive evidence cannot be drawn about the clinical superiority of T-PRF. Further appropriately powered randomized controlled trials with prolonged follow-up periods are necessary to determine the long-term clinical efficacy of T-PRF in implant therapy. Clinical Trial Registration number: CTRI/2022/11/047159.
Anuraga Tejaswi Thotimpuri, M. Pasupuleti, G. Penmetsa et al.· Journal of Advanced Periodon...· 0 citations