The objective of this retrospective study is to verify the effectiveness and safety patient-specific titanium implants on maxillofacial bones, with a long-term follow-up. Total 16 patients various defects underwent reconstruction using implants. Titanium implants, manufactured by electron beam melting, selective laser sintering, or milling, were inserted into maxilla, mandible, zygoma. Long-term follow-up (36.7 ± 20.1 months) was conducted after surgery. Bone fusion implant body,...

In this study, we evaluated the bone regenerative capability of a customizable hydroxyapatite (HA) and tricalcium phosphate (TCP) scaffold using digital light processing (DLP)-type 3D printing system. Twelve healthy adult male beagle dogs were study subjects. A total 48 defects created, with two on each side mandible in all dogs. The defect sites negative control group (sixteen defects) left untreated (the NS group), whereas those positive filled particle-type substitute PS group)....

Abstract The purpose of the present study was to evaluate mechanical strength and absorption rate WE43 material develop an absorbable metallic plate screw for craniofacial application. extruded were evaluated using a LeFort I osteotomy canine model 10 beagle dogs. Animals divided into two groups: five dogs in experimental group control group. μCT acquired at 4, 12, 24 weeks. At weeks after operation, all animals sacrificed, histologic evaluation performed. Swelling gas formation observed...

This study evaluated the mechanical properties and bone regeneration ability of 3D-printed pure hydroxyapatite (HA)/tricalcium phosphate (TCP) ceramic scaffolds with variable pore architectures. A digital light processing (DLP) 3D printer was used to construct block-type containing only HA TCP after polymer binder completely removed by heat treatment. The compressive strength porosity blocks various structures were measured; different sizes implanted in rabbit calvarial models. animals...

The aim of this study was to segment the maxillary sinus into bone, air, and lesion, evaluate its accuracy by comparing analyzing results performed experts. We randomly selected 83 cases deep active learning. Our learning framework consists three steps. This adds new volumes per step improve performance model with limited training datasets, while inferring automatically using trained in previous step. determined effect on cone-beam computed tomography (CBCT) dental our customized 3D nnU-Net...

Abstract Background The inferior alveolar nerve (IAN) innervates and regulates the sensation of mandibular teeth lower lip. position IAN should be monitored prior to surgery. Therefore, a study using artificial intelligence (AI) was planned image track automatically for quicker safer Methods A total 138 cone-beam computed tomography datasets (Internal: 98, External: 40) collected from multiple centers (three hospitals) were used in study. customized 3D nnU-Net segmentation. Active learning,...

Abstract Aim To evaluate the neurosensory outcome of management damaged inferior alveolar nerves caused by endodontic overfilling and to assess efficacy delayed surgical intervention. Methodology Nine patients who underwent removal extruded material were included. All evaluated for function using a set standardized tests. The intervention was through patient interview quantitative statistical analysis. Results Surgical procedures included foreign body removal, microsurgical external/internal...

Conventional guided bone regeneration (GBR) limits the amount of graft due to limited soft tissue expansion. We hypothesize that use expander will successfully augment prior graft, allowing for sufficient grafting which lead a more stable and effective vertical graft. The authors aimed evaluate effectiveness novel self-inflating augmentation in terms expansion, clinical outcomes, related complications.A prospective, multicenter, randomized controlled trial was performed on patients requiring...

The purpose of this study was to evaluate the mechanical strength and biodegradation a ZK60 plate coated with poly(l-lactic)-acid polymer (PLLA) in LeFort I osteotomy canine model for maxillofacial applications. PLLA-coated screw were evaluated using based on five beagles. presence wound dehiscence, exposure, gas formation, inflammation, pus occlusion, food intake, fistula formation evaluated. After 12 weeks, these dogs sacrificed, an X-ray micro-computed tomography (µCT) conducted. Plate...

Abstract This study evaluated the bone regeneration capacity and mechanical properties of block-type hydroxyapatite (HA)/tricalcium phosphate (TCP) scaffolds in response to different concentrations polydeoxyribonucleotide (PDRN) recombinant human morphogenic protein 2 (rhBMP-2). Thirty-two male white rabbits were used as a model calvarial defect classified into eight groups according type concentration growth factor administered, viz., control group (only HA/TCP scaffold), scaffold + PDRN...

The use of biodegradable materials in bone plates offers remarkable advantages; however, their application fixation is limited by brittleness. Moreover, treatments tailored to patient conditions are needed orthopedics. In this study, were fabricated with stereocomplex polylactic acid (scPLA) and the effects poly(d-lactic acid) molecular weight scPLA blending ratios analyzed. Although modulus values poly(l-lactic (PLLA) similar, strain resistance improved at higher proportions. enhanced...

Nonabsorbable metallic membrane for guided bone regeneration is remained permanently even though after complete healing. There would be exposure followed by the risk of infection; should removed additional procedure such as implant installation. Since absorbable nonmetallic mesh absorbed within 3 to 6 months, it unnecessary removed. However, shows lower retention, mechanical strength, and difficulty manipulation than nonabsorbable ones.The purpose this study evaluate ability...

Objectives The purpose of this study was to establish normative data for healthy Korean adults by measuring the maximal strength and endurance scores tongue, lip, cheek, examine correlations between these measurements. Materials Methods This included 120 subjects that were divided into three groups according age: young (20-39 years), middle-aged (40-59 older (over 60 years); gender. Measurements taken using Iowa Oral Performance Instrument (IOPI). Results mean tongue strengths as follows:...

Abstract Titanium (Ti) screw has excellent mechanical property, and osseointegration capacity. However, they require surgery for removal. In contrast, polymer screws are resorbable, but have poor properties. this research, magnesium alloy (WE43: Mg‐Y‐Nd‐Zr) that advantages of titanium were manufactured. addition, to increase biocompatibility control degradation rate, the Mg was coated with hydroxyapatite (HA). Torsion test corrosion performed in vitro . For clinical, radiological...

Background and objectives: This study aimed to evaluate the effectiveness of decompression on jaw cysts according various parameters by volumetric analysis using three-dimensional computed tomography. Materials methods: Fifty patients who underwent surgical cystic lesion were selected, their preoperative postoperative tomography results between 3 27 months collected. Volumetric was performed any differences in rate change sex, age, initial volume lesion, duration, location tooth extraction,...

Abstract Aim This study aimed to investigate the association between work patterns and periodontal disease. Materials methods Data were collected from Korea National Health Nutrition Examination Survey 2007 2012, data 22,508 subjects aged ≥19 years included. An individual's pattern was classified as either daytime or shift work. Sleep duration categorized into three ranges: ≤5, 6–8, ≥9 h/day. A multivariate logistic regression model used determine adjusted odds ratio (OR) for CPI (Community...

Magnesium (Mg) has the advantage of being resorbed in vivo, but its resorption rate is difficult to control. With uncontrolled resorption, as a bone fixation material minimal clinical value. During not only strength rapidly weakened, rapid formation metabolite also occurs. In order overcome these disadvantages, hydroxyapatite (HA) surface coating pure magnesium plate was attempted this study. plates were inserted above frontal Sprague-Dawley rats both control group (Bare-Mg group) and...

In porous titanium scaffolds manufactured via 3D printing, the differences in bone formation according to pore design and implantation period were studied. Titanium with three types of different structures (Octadense, Gyroid, Dode) fabricated printing using selective laser melting method. Mechanical properties investigated. Prepared specimens inserted into both femurs nine rabbits their clinical characteristics observed. Three animals sacrificed at 2nd, 4th, 6th weeks, radiologically...

(1) Background: To compare the degree of conversion resin cores in various types cavities and determine an effective irradiation method for achieving a higher conversion. (2) Methods: Four different-sized (narrow–shallow, narrow–deep, wide–shallow, wide–deep) were simulated using Teflon mold. The light irradiance reaching bottom each mold was measured by positioning radiometer. dual-cure core after (400 mW/cm2 20 s, 400 40 800 s) Fourier-transform near-infrared spectroscopy. (3) Results:...

Autogenous tooth transplantation is a reliable method for repairing missing teeth. Although it recently became recognized and feasible treatment in dentistry, the long-term efficacy of root canal therapy (RCT) has not been well confirmed. This study aimed at determining whether RCT good effect on success rate teeth with complete roots autogenous transplantation.Data were collected from Korea University Guro Hospital. Data patients who underwent within 9 years collected. We selected 29 as...

The spread and application of computer-aided design/computer-aided manufacturing (CAD/CAM) technology have contributed to the rapid development digitalization in dentistry. accuracy scan results is closely related devising subsequent treatment plans outcomes. Professional standards for evaluating scanners are specified American National Standard/American Dental Association Standard 132 (ANSI/ADA No. 132). aims this study were use three samples mentioned ANSI/ADA evaluate reproducibility two...

Background and Objectives: To evaluate the stability of a dental implant effectiveness newly designed damping capacity assessment device by improving number blows strength evaluated prospective clinical study. Materials Method: The implants was measured in 50 total 38 patients. Measurements were performed using Anycheck Periotest M devices, twice total, divided into buccal lingual directions. In addition, measurements on day surgery, two weeks, one month, months, three months after surgery...

The objective of this study was to evaluate a surgical technique and present the results delayed reconstruction palatomaxillary defects using fibula free flap (FFF).A review conducted for nine patients who underwent FFF. Primary disease, type reconstruction, defect area, segment length number osteotomies, radiotherapy, implant installation after FFF were analyzed.All reconstruction. shaft osteotomized into two segments in seven three one patient with bilateral Brown's revised classification...