• Original Article

    Assessment of Factors that Affect Primary Stability of Minimally Invasive Implant (MII): An in vitro Study
    Yong Woan Kim, Seung-Ki Min, Je Won Wang, Kyung Su Shin
    Purpose: This study aimed to evaluate the factors affecting the primary stability of a new implant design based on minimally invasive implantation … + READ MORE
    Purpose: This study aimed to evaluate the factors affecting the primary stability of a new implant design based on minimally invasive implantation (MAGICORE® ; INNOBIOSURG Co. Ltd., Daejeon, Korea) using the evaluation index of Periotest value (PTV), implant stability quotient (ISQ), and implant stability test (IST).Materials and Methods: A total of 1056 implants were implanted in artificial bone, imitating human bones D1, D2, D3, and D4. The PTV, ISQ, and IST values of all implants were measured according to the manufacturer’s guidelines for each measuring instrument. To compare the factors affecting the stability of the implant for each measurement method, one-way ANOVA was performed, and posthoc analysis was performed using the Games–Howel test (p < .05). In addition, a stepwise multiple linear regression analysis was performed to evaluate the weight of each factor.Results: Implants with diameters greater than 5.0 mm showed significantly lower PTV values and higher ISQ and IST values. Implants with 11 mm length showed the lowest PTV and highest ISQ and IST values. A cuff size of 2 mm showed the highest implant stability among all the measurement methods. In this study, poor bone quality decreased the primary stability.Conclusion: As the cuff size increased, the stability decreased, and the larger the diameter of the implant, the longer the length and higher the primary stability. The bone quality and diameter of the implant contributed more to the stability of the implant than to the length of the implant and cuff size. - COLLAPSE
    31 March 2022
  • Original Article

    Comparison of Accuracy in Digital Implant Impression using Dedicated and Compatible Scanbodies
    Geunwoon Jang, Joonseong Kim, Yuri Heo, Meekyoung Son
    Purpose: The purpose of this study was to compare the accuracy of digital implant impressions using two different types of scanbodies for … + READ MORE
    Purpose: The purpose of this study was to compare the accuracy of digital implant impressions using two different types of scanbodies for the same implant.Materials and Methods: Four implants (TS III) were inserted in the second premolar and the first molar edentulous areas on a mandibular acrylic resin dentiform. Reference digital images were obtained through a dental model scanner (S600 ARTI model scanner) af ter connecting their own digital scanbodies for the implants. Experimental intraoral scanner images were acquired using the Trios® scanner with both Zirconzhan’s own scanbodies for the implants and compatible scanbodies (Dio scan adapter 01). The experimental groups were categorized into eight groups (T1-T4, NT1-NT4) according to position of the implant, existence of the second molar and scanbody type. Digital images of the experimental group were matched with the reference images using the optimal matching algorithm of a 3D image analysis program (Geomagic Design X 2014), and scanning errors were calculated. Independent two sample t-test was applied to assess the significance between the two experimental groups (α = .05).Results: Average error values in Groups T1-NT4 were 0.87 ± 0.46 um, 4.86 ± 3.08 um, 4.64 ± 1.94 um, 3.80 ± 2.76 um, 4.34 ± 2.45 um, 16.80 ± 4.98 um, 7.51 ± 1.09 um, and 12.96 ± 3.74 um respectively. Statistically significant differences were found corresponding to the second premolar edentulous area according to the scanbodies. Statistically significant differences were found in both the second premolar and first molar edentulous areas depending on the presence of the most posterior tooth.Conclusion: Using compatible scanbodies to take a digital impression of an implant can be an effective alternative to using a dedicated scanbody for the implant. - COLLAPSE
    31 March 2022
  • Original Article

    Accuracy of Surgical Robot System Compared to Surgical Guide for Dental Implant Placement: A Pilot Study
    Xun Jin, Ryan Jin-Young Kim, Ji-Man Park, Ui-Won Jung, Jae-Kook Cha, June-Sung Shim, Seong-Joo Heo
    Purpose: This study aimed to evaluate the tracking accuracy of a robot-guided implant surgery system and compare the spatial accuracy of robot-assisted … + READ MORE
    Purpose: This study aimed to evaluate the tracking accuracy of a robot-guided implant surgery system and compare the spatial accuracy of robot-assisted implant surgery with that of static stentguided implant surgery for implant placement.Materials and Methods: The tracking accuracy of the robot system was evaluated by measuring the discrepancy between the robot arm and actual programmed position. Dental implants were placed on 3D printed human phantom models using static stent-guided and robot-assisted surgeries. The top, apex, angular, and depth deviations of the placed implant positions were measured relative to the planned position, and the values were compared between the robot and surgical guide groups. The results were analyzed using the Mann-Whitney U test (α = .05).Results: The tracking accuracy of the robot system showed a linear deviation of 0.13 ± 0.04 mm and an angular deviation of 0.77 ± 0.02° at the drill tip. Deviations at the top and apex of the implants were 0.61 ± 0.29 mm and 0.50 ± 0.14 mm in the robot group and of 0.49 ± 0.39 mm and 0.72 ± 0.39 mm in the surgical guide group, respectively. Angular and depth deviations were of 2.38 ± 0.62° and 0.17 ± 0.12 mm, respectively, in the robot group, and of 3.16 ± 2.36° and 0.15 ± 0.11 mm, respectively, in the surgical guide group. No statistically significant differences were found between the robotic and surgical guide groups (p > .05).Conclusion: The accuracy in implant placement using robot-assisted implant surgery was comparable to that of static-guided surgery. Robot-assisted implant surgery and static-guided surgery tended to result in minor deviations at the apex and top of the implants, respectively. - COLLAPSE
    31 March 2022
  • Clinical or Case Report

    A Case of Full Mouth Rehabilitation with Immediate Placement and Bilateral Sinus Graft in a Patient with End-stage Renal Disease and Diabetes
    Gyu-Rang Kim, Sang-Hyun Ju, Kwan-Soo Park
    Patients with end-stage renal disease (ESRD) and diabetes mellitus (DM) may have difficulties in the rehabilitation of multiple missing teeth with implants … + READ MORE
    Patients with end-stage renal disease (ESRD) and diabetes mellitus (DM) may have difficulties in the rehabilitation of multiple missing teeth with implants owing to high risks of complications such as infection, alveolar bone loss, and bleeding. We report a case of f ull-mouth rehabilitation with immediate placement of dental implants and bilateral sinus graf t in a 50-year-old man with ESRD and DM. The patient received dental implants supporting fixed segmented zirconia bridges with an appropriate occlusal scheme, including immediate dentures. A sinus bone graf t was performed using a lateral approach to rehabilitate the pneumatized maxillary posterior edentulous area. Some implants were placed immediately af ter extraction of the mandibular teeth. Thus, f ull-mouth rehabilitation was successf ully achieved with the timely use of well-supervised treatment protocols. - COLLAPSE
    31 March 2022
  • Review Article

    A Narrative Review of Contemporary Evaluation Methods for Root Analog Implants
    Jungwon Lee, Yang-Jo Seol, Yong-Moo Lee, Ki-Tae Koo
    Various dental implant studies have been conducted because the biological and mechanical properties of implants can differ owing to the diversity of … + READ MORE
    Various dental implant studies have been conducted because the biological and mechanical properties of implants can differ owing to the diversity of surf ace treatments, alloys, and macrodesigns. Previously, root analog implants were made using an impression of the extraction socket or extracted tooth. Recently, several studies have been conducted on implant manufacturing and application methods including computer-aided manufacturing, 3D printing, and digital technologies. In clinical applications, the mechanical and biological safety of root analog implants must be ensured; therefore, an appropriate evaluation method is required. The purpose of this narrative review is to describe the evaluation methods focusing on the mechanical strength, biological safety, and stability of root analog implants. - COLLAPSE
    31 March 2022