Abstract Objectives: The aims of this study were to objectively assess bone quality with density values obtained by cone‐beam computed tomography (CBCT) and determine the correlations between primary stability dental implants. Material methods: Eighteen Straumann implants inserted into 18 fresh femoral heads swine. densities implant recipient sites preoperatively determined value using CBCT. maximum insertion torque each was recorded a digital meter. Resonance frequency, which represented...

The purpose of this study was to elucidate the efficacy and safety carbonate apatite (CO3Ap) granules in 2-stage sinus floor augmentation through radiographic histomorphometric assessment bone biopsy specimens.Two-stage performed on 13 patients with a total 17 implants. Radiographic using panoramic radiographs immediately after also 2 additional times, at 7±2 months 18±2 post-augmentation, respectively. Bone specimens taken from planned implant placement sites underwent micro-computed...

Abstract Implant surgery with surgical guide has been introduced a concept of position improvement. The might be considered as easy even for inexperienced clinician because step simplicity. However, there are residual risks, resulting in postoperative complications. aim this study was to assess the accuracy implant by clinicians vitro. After preoperative computed tomographies (CTs) five artificial models unilateral free‐end edentulism scan templates, guides were established from templates....

Purpose: Platelet-rich fibrin (PRF) has been reported to contribute bone regeneration; however, little is known about details with deproteinized bovine mineral (DBBM). This study aims evaluate additional effects of PRF on regeneration in sinus augmentation DBBM. Materials and Methods: Sinus augmentations were made DBBM/PRF mixture as lateral approach for 4 sinuses from patients. Bone biopsies obtained posterior maxilla at the implant placements 7 or 10 months after augmentations....

The aim of this study was to examine the fit accuracy e.max crowns by investigating marginal and internal gaps.In experiment 1, 60 computer-aided design/computer-assisted manufacture (CAD/CAM) were manufactured. fabricated using optical scanning artificial teeth (Op group) or a plaster model following silicone impression (M group). Cement space settings 90, 120, 150 μm applied. Marginal crown gaps compared among six conditions (Op90, Op120, Op150, M90, M120, M150). In 2, CAD from Op group...

Abstract Objectives The purpose of this study was to investigate the influence magnitude immediate loading on peri‐implant bone in an animal model dental implantation. Material and methods Eight weeks after extraction maxillary mandibular premolars, three implants were inserted bilaterally mandibles six Beagle dogs. One implant unloaded ( UL ) as a control, two loaded immediately with 10 N (mild loading: ML or 50 (excessive EL laterally using cyclic device twice week for 3 weeks. Fluorescent...

The aim of this study was to compare the effects mucosal thickness on stress pattern around implants and movement implant-supported overdentures with ball/female three different types magnetic attachments. After insertion two root-form into a mandibular model, surface model covered 1.5- or 3-mm layer impression material simulate oral mucosa, removable were fabricated each model. A 50-N vertical force applied right first molar, resultant distribution denture measured. In 1.5-mm attachments...

The purpose of this study was to evaluate prospectively the clinical effectiveness immediate loading implants with complete-arch fixed prostheses in edentulous maxillae after were placed flapless guided surgery.Patients who visited a single dental clinic during recruitment period (April 2011 May 2012) selected by consecutive sampling and predetermined selection criteria. Four six each patient surgery. outcome measures insertion torque, surgical time, postoperative pain (100-mm visual analog...

The attrition of enamel when opposed by ceramics is great concern. purpose this study was to evaluate wear against high translucent zirconia (Zr), lithium disilicate (LD), gold (Au), and (E) with different surface contact conditions. materials were divided into two groups: polished ground (n=8 each). Two-body tests performed human vertical horizontal, repetitive movements as experiments 1 3 respectively. roughness all except Zr changed throughout the experiments. In experiment 1, Au showed...

Abstract Purpose The study aims to provide a theoretical guidance of postmaxillary implant in the augmented sinus without grafting materials by establishing three‐dimensional model this new restorative technique, evaluating failure risk augmentation different alveolar ridge heights, and analyzing stress distribution healing stage. Materials Methods Seventeen finite element models posterior maxillary region with mucosa elevation heights were constructed according anatomical data area,...

Stress distribution in peri-implant bone an edentulous maxilla following delayed and immediate loading implant the effect of length on maximum stress were evaluated by using two kinds finite element analyses. A threaded was loaded with a 100 N vertical force, either immediately or delayed, examined analysis simple contact relation bonding interaction between bone, respectively. Higher stresses observed cortical around neck trabecular threading model. The model dramatically higher than...

Zirconia exhibits good tissue compatibility and nontoxicity, making it a widely used esthetic replacement material for implant abutments. To avoid abutment-fracture, the parts composed of zirconia with bonded metal component connected to can be used. The purpose this study was design titanium components high fracture resistance at component's edge line. Three line designs base sleeve were made: chamfer, shoulder, back-taper. assess strength abutment design, static loads applied vertically 30...

The purpose of this study was to investigate the effects implant position and loading on biomechanical behaviors using implant-supported removable partial denture (ISRPD) models in a simulated Kennedy class Ⅱ partially edentulous mandible. Three types mandibular acrylic resin (a conventional RPD without support by an implant—CRPD; with placed at first molar (#46)—MP-ISRPD— second (#47)—DP-ISRPD) were used measure vertical displacement RPD, mesio-distal abutment tooth, bending moment tooth...

A clinical study was conducted of 59 patients treated with 78 hydroxyapatite (HA)-coated blade implants from August 1986. Five in 5 were broken at the neck portion, and one implant patient removed jaw bone. The histological findings around a which mandible are presented. These sections showed good adaptation bone to without fibrous layer. Histomorphometric evaluation bone-to-implant contact 73.5%. scanning electron microscopy image fractured surface revealed fatigue fracture. suspected cause...

Previously, a few models have been proposed to predict bone resorption process due stress shielding in long bones such as proximal femur; however, there are almost no reports on finite element analysis of loss marginal dental that is caused mainly by occlusive overload. In this work, the stress, strain and energy density (SED) criteria were separately applied simulate overload-induced jawbone/implant system means analysis. A simplified bone/implant model was created, with composed cortical...

The development of effective methods to disinfect biofilms on dental materials is medically important. This study evaluated the bactericidal effects peroxynitric acid (HOONO2; PNA) formed titanium surfaces. Streptococcus gordonii was cultured either machined or rough discs that were then used evaluate seven reagents, i.e., normal saline, benzalkonium chloride disinfectant solution, chlorhexidine digluconate three concentration types PNA, and inactivated PNA. Using low bacterial count based a...

A number of finite element analyses (FEAs) for the dental implant were performed without regard preload and with all interfaces ‘fixed-bonded’. The purpose this study was comparing stress distributions between conventional FEA model contacting ‘fixed-bonded’ (bonded model) components in ‘contact’ friction simulated as a preloaded (contact model). We further verified accuracy result using experiment. In contact model, more widely distributed than bonded model. From study, induced by screw...

This retrospective study aimed to investigate the survival rate of implants from 5 10 years after placement implant-supported fixed dental prostheses (ISFDPs) and management implant loss in elderly population. Elderly patients (≥65 old) who had been treated with ISFDPs followed up for at least between October 2009 March 2020 were enrolled. Patient profiles implant-related data extracted. The as well 10-year cumulative evaluated. prosthetic interventions also investigated. In total, 195 (mean...

Yoichiro Ogino, DDS, PhD/Yasuyuki Matsushita, PhD/Masanori Sasaki, PhD/Yasunori Ayukawa, PhD/Kiyoshi Koyano, PhD: Purpose: To evaluate marginal bone level changes over 3 years around platform-shifting implants with internal conical connections, and to identify the factors relating changes. Materials Methods: Systemically healthy patients who lost one tooth or two consecutive teeth were enrolled in study. The subjects received connections healed a submerged manner. Digital standardized...

For normal healthy teeth, the percussive energy generated by mastication is attenuated periodontal ligament at bone/natural tooth interface. However, when a natural must be replaced an implant because of damage or disease, lost and will transmit forces to bone directly. Studies have evaluated deformation distribution alveolar in vicinity implants using finite element analysis photoelasticity. requires clinical verification determination material properties, photoelastic materials generally...