cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.14457/tu.the.2023.1208
title: Micro-computed tomography evaluation of minimally invasive root canal preparation in 3D printed c-shape canal

description: Introduction: The C-shaped canal is a complex anatomical variation that poseschallenges for cleaning and shaping due to its intricate structure. This study aims toevaluate and compare the shaping abilities and minimum dentin thickness followingcanal preparation with 2 minimally invasive rotary instruments in a 3D-printed Cshapedcanal via micro-computed tomography.Methods: Twelve 3D-printed C-shaped canal models were generated from onehuman mandibular molar and assigned to two groups based on the type of instrumentsused for canal preparation: XP-endo Rise (XR, n=6) and TruNatomy (TN, n=6)groups. The shaping abilities, measured in terms of the percentage of canal volumechange and prepared canal area, as well as minimum dentin thickness after canalpreparation were assessed using micro-computed tomography.Results: The percentage of canal volume change was 22.66±4.28% for the XR groupand 23.02±5.10% for the TN group. The percentage of prepared canal area was31.86±10.72% in the XR group and 29.60±10.51% in the TN group. The minimumdentin thickness after canal preparation was 0.30±0.05mm for the XR group and0.28±0.05mm for the TN group. No significant differences were observed in thepercentage of canal volume change, prepared canal area, and minimum dentin(3)thickness between the two groups (p&gt;0.05). The canal volume change in the middlethird was significantly higher than that in the coronal and apical thirds (P&lt;0.05) inboth groupsConclusion: The shaping abilities and minimum dentin thickness of XR were similarto those of TN for C-shaped root canal preparation.
DOI: 10.14457/tu.the.2023.1210
title: Oral health as perceived by Karen people living with tooth loss and non-communicable: a case study of Doi Luang, Chiang Rai, Thailand

description: Background: Oral health examination, as part of a comprehensive healthcheck-up, is free of charge for people living with non-communicable diseases (NCDs)in Thailand as there’s a strong connection between diabetes and periodontitis. However,the use of this service among hill tribe population has been low. Objective: Theobjectives of this study were to explore 1) how Karen adults and older adults livingwith NCDs define oral health, and 2) how Karen culture influenced their oral healthrelated issues. Methods: The researchers selected Norpagor subdistrict as our studysetting because it was the catchment area for primary care of Doi Luang Hospital, wherethe first author of this study was responsible for delivering the oral health services. Theresearchers selected Karen people because they were the largest hill tribe in Thailandand studies regarding oral health of Karen elders in Northern Thailand is still scarce.The researchers recruited all Karen people of Norpagor who had NCDs and fit ourselection criteria such as 1) being 40 years old or over and 2) not being the end-of-lifepatient. First, the researchers performed a brief oral health examination using a criterionpromoted by the Dental Bureau, Ministry of Health based on number of remainingteeth. Also, the researchers measured the participants’ chewing performance using acolor-changeable chewing gum to see the mixing ability. Second, the researchersselected 12 participants who did not pass either the number of teeth or chewing abilitycriteria for a semi-structured face-to-face interview by translator. A dental assistant whospoke Karen language was present at all interviews to aid with any translation needed.Interviews were recorded and transcribed verbatim. Both authors employed aninductive thematic content analysis and end the fieldwork findings analysis when itreaches data consensus. Results: Twenty-seven people (69%) had more than 20 teethand passed the chewing test. Eleven people (28%) neither had adequate number of teethor chewing performance. Interestingly, one person (3%) passed the chewing gum testeven with fewer than 20 teeth/4 occluding posterior teeth. Three common themesemerged from the interviews: 1) Good oral health was defined as having no pain, beingable to enjoy food varieties, and being able to eat socially, but interestingly there wasno concern about nutritional status); 2) Tooth loss is part of life but not necessarily partof general health; 3) Oral health problems are “bearable” and “could be manageable bymyself”. Conclusion: The findings may help dental professionals to better understandthe perceived needs by the patients. The use of dental services may be promotedaccording to what Karen people find meaningful. Also, oral health examination mayinclude testing of oral function such as chewing ability, which may not necessarilycorelate with the number of remaining teeth.
DOI: 10.14457/tu.the.2024.46
title: Application of deep convolutional neural network models in intra oral periapical radiograph for prediction of endodontic treatment outcomes

description: Introduction: Modern endodontic treatments are highly effective in saving teeth thatmight otherwise need to be extracted. However, like any medical procedure, there isalways a chance of failure. Predicting potential failure during the preoperative phase iscrucial to ensure that patients receive the most appropriate treatment. This study aimedto evaluate the performance of a deep learning-based segmentation model for predictingoutcomes of non-surgical endodontic treatment.Methods: Preoperative and 3-year postoperative periapical radiographic images of eachtooth from routine root canal treatments performed by endodontists from 2015 to 2021were obtained retrospectively from Thammasat University hospital. Preoperativeradiographic images of 1200 teeth with 3-year follow-up results (440 healed, 400healing, and 360 disease) were collected. Mask Region-based Convolutional NeuralNetwork (Mask R-CNN) was used to pixel-wise segment the root from other structuresin the image and trained to predict class label into healed, healing and disease. Threeendodontists annotated 1080 images used for model training, validation, and testing.The performance of the model was evaluated on a test set and also by comparison withthe performance of clinicians (general practitioners and endodontists) with and withoutthe help of the model on independent 120 images.Results: The performance of the Mask R-CNN prediction model was high with themean average precision (mAP) of 0.88 (95% CI 0.83-0.93) and area under the precisionrecall curve of 0.91 (95% CI 0.88-0.94), 0.83 (95% CI 0.81-0.85), 0.91 (95% CI 0.90-0.92) onhealed, healing and disease, respectively. The prediction metrics of general practitionersand endodontists significantly improved with the help of Mask R-CNN outperformingclinicians alone with mAP increasing from 0.75 (95% CI 0.72-0.78) to 0.84 (95% CI 0.81-0.87) and 0.88 (95% CI 0.85-0.91) to 0.92 (95% CI 0.89-0.95), respectively Conclusion: Deep learning-based segmentation model had the potential to predict nonsurgical endodontic treatment outcomes from periapical radiographic images and wereexpected to aid in endodontic treatment.
DOI: 10.14457/tu.the.2023.1211
title: Analysis of stress distribution and displacement based on the miniscrews positions of the palatal slope bone-borne expander: a finite element study

description: Objectives: The study aimed to investigate the stress distribution pattern of the palatalslope bone-borne expander on the maxillary area according to a differentanteroposterior position of anchored miniscrews using finite element analysis.Materials and Methods: Nasomaxillary stereolithography files with 3 differentanteroposterior anchored miniscrew positions of the palatal slope bone-borne expanderwere determined as models A, B, and C. Each model consists of four supportedminiscrews. Model A: two anterior miniscrews were located between the maxillarycanine and the first premolar, and two posteriors between the second premolar and thefirst molar. Model B: two anteriors were between the lateral incisor and the canine, andtwo posteriors were the same as in model A. Model C: two anteriors were the same asin model A, and two posteriors were distal to the first molar. One turn of expanderscrews was applied. Maximum principal stress, equivalent elastic strain, equivalent vonMises stress, and transverse displacement were evaluated.Results: The maximum principal stress was mostly found at the bone-miniscrewinterface. Model A exhibited an intersecting area of stress between the supportedminiscrews. The highest value of principal stress was in model B, while model Cshowed a uniform distribution pattern. The elastic strain pattern was similar to theprincipal stress in all models. The highest value of equivalent von Mises stress waslocated on the expander screw. The largest amount of transverse displacement of teethwas in model A, while model C exhibited a more consistent transverse displacementthan other models. Vertical displacement of posterior teeth was also noticed.Conclusions: Finite element research revealed that the various anteroposteriorminiscrews placements of the palatal slope bone-borne expander had various patternsof stress distribution and resulted in various outcomes. It may be inferred that modelA's miniscrew location was advantageous for obtaining expansion quantities, but modelC's miniscrew position was advantageous for maintaining consistent biomechanics.
DOI: 10.14457/tu.the.2022.1647
title: Finite element analysis in mandibular advancement between Hunsuck/Epker and the novel modification of low Z plasty technique of BSSO

description: The recent modification of the BSSO technique was a novel modificationof the Low Z plasty (NM-Low Z) technique that main purpose is to reduce postoperativecomplications and ease the operative method. This surgical techniquechanges the horizontal osteotomy line more inferiorly than in the conventionalHunsuck–Epker (HE) method to be a more surgeon-friendly technique. The aim ofthis study was to compare the biomechanical behavior under simulated conditionsbetween the NM-Low Z and HE techniques on mandibular advancement. The modelswere investigated under physiological muscular and occlusal loads in 5 periods of theinflammatory stage (1-week post-operative), 2,4,6, and 8 weeks post-operative. Finiteelement analysis was used to analyze many parameters including stress distribution,elastic strain, and model displacement. Maximum equivalent Von Mises stresses wereobserved on the fixation system and bone. The elastic strain at the fracture siterepresented the optimal bone-healing capacity. The NM-Low Z model showed lowerstress than the HE models after 2 weeks of the post-operative stage onward. The elasticstrains observed in both models demonstrated within the normal range for bonehealing. The ranges of displacement for NM-Low Z model were less than that in HEmodels. In conclusion, the biomechanical study of the NM-Low Z technique can becompared to the conventional EH technique. The NM-Low Z technique could promotepost-operation skeletal stability by lowering stress on fixation and bone with lessdisplacement of the segment during bone healing periods.
DOI: 10.14457/tu.the.2022.1648
title: Biomechanical performance on narrow-diameter implants supports splinted and non-splinted prosthesis used in atrophic posterior maxilla in aging patient: a finite element analysis

description: The aim of this experimental study was to evaluate the stress distribution in periimplantcrestal bone on three implant models of category 2 (diameter 2.5 to 3.3 mm)and category 3 (diameter 2.5 to 3.3 mm) narrow diameters implant with splinted andnon-splinted crown in atrophic posterior maxilla in aging patients using the finiteelement analysis method (FEA).Materials and methodsTwo dental implants of category 3 narrow diameter (3.3 mm) restored with nonsplintedcrown (Regimen group; R group), two dental implants of category 2 narrowdiameter implants (3.0 mm) restored with non-splinted crown (Experimental 1; E1group) and two dental implants of category 2 narrow diameter (3.0 mm) restored withsplinted crown (Experimental 2; E2 group). A three-dimensional model was designed2022with cortical and cancellous bone, a crown and an implant/abutment set of eachgroup. Axial, oblique (30 ̊), and lateral (90 ̊) loads of 56.9 N was applied. The equivalentvon Mises stress was used for the implants and peri-implant bone microstrain wereevaluated by Frost’s mechanostat theory.ResultsIn the axial load, the von Mises stress value of NDIs for all groups were comparable.The lateral load showed highest von Mises stress value in R-10 group with 9.78-foldhigher than axial load, and 1.66 to 2.16-fold higher than that the oblique direction.However, there are no groups of study showed a value higher than the Ti-Zr materialyield strength limit.The stress analysis of elastic strain in axial load direction of all groups were within theadapted window (physiologic window) of Frost’s mechanostat theory, while the resultof oblique load was range in mild overload window, and lateral load result was rangein pathologic overload window. The elastic strain of axial load result was comparablein stress distribution of all group. However, in oblique load and lateral load, thesplinted crown group show the better result of elastic strain than non-splinted crowngroup, and this result was smaller than of the regimen group.Conclusionsthe narrow-diameter implant can be used to rehabilitation in upper posteriorarea of aging patients. The category 3 narrow-diameter implant (3.3 to 3.5 mm) andcategory 2 narrow-diameter implant (2.5 to &lt;3.3 mm) can be used successfully inposterior maxilla area in meaning of axial load transmitted. However, the angle loadin narrow-diameter implants should be carefully considered together with otherbiomechanics relative factors. Additionally, the splinted crown can be helpful inconditions of angle load for better load sharing effect
DOI: 10.14457/tu.the.2024.47
title: Effectiveness of polycaprolactone impregnated 3D printed hydroxyapatite in lateral maxillary sinus augmentation: a randomized controlled clinical trial

description: ObjectivesTo evaluate the clinical efficacy of polycaprolactone impregnated with 3D-printednanohydroxyapatite (3DP HAPCL) in comparison to the commercial xenograft (Straumann®Xenograft) for lateral maxillary sinus augmentation prior to dental implant placement.Material and methodsTwenty patients, including 22 maxillary sinuses, who underwent lateral maxillary sinusaugmentation were allocated and randomized into two groups: Xenograft (control group, 11sinuses) and 3DP HAPCL (test group, 11 sinuses). After six months, biopsy bone cores werecollected from all patients. Clinical, radiographic (vertical bone height and bone volume), micro-CT (percentage of new bone formation and residual bone graft), and histological data (percentageof new bone formation and residual bone graft) were analyzed at baseline, immediately postsurgery,at six months, and one year post-operation.ResultsAll patients had their prostheses fully loaded and were followed up three months afterloading. The survival and success rates were 100% in the control group and 81.81% in the testgroup. The stability of both grafting materials showed no statistically significant difference inheight and volume after one year of lateral maxillary sinus augmentation. However,histomorphometry and micromorphometry analyses revealed a statistically significant lowerpercentage of new bone formation in the test group compared to the control group while the amountof residual bone graft remained unchanged at six months post-operation. Additionally, otherclinical parameters, including sulcus bleeding index, plaque index, probing depth and marginalbone level were within normal limits.ConclusionBased on this study, 3DP HAPCL composite demonstrates potential as an alternative bonegraft material to deproteinized bovine bone mineral.
DOI: 10.14457/tu.the.2023.1212
title: The development of a mobile application for an oral health assessment of functionally dependent patients: a pilot study in Chiang Rai Province

description: Background: Accessing dental care can be challenging for functionally dependentpatients. This pilot study aimed to develop a mobile application to address thischallenge by improving communication among healthcare professionals, enhancingreferral systems, and improving access to timely oral health services.Methods: Dentists and programmers collaborated in co-designing the “Thai version ofOral Health Assessment Tool” (T-OHAT) mobile application. The function of the appwas to offer training tutorials, facilitate real-time screenings, generate referral letters,and manage dental appointments. The study comprised of two phases: Phase I focusedon training the Village Health Volunteers (VHVs) using the app and evaluating itseffectiveness through tutorials, exercises, and summative assessments. Phase IIevaluated the app's real-world performance with two VHVs conducting oral healthscreenings for 36 dependent patients. We documented the screening time spent as wellas assessing inter-examiner reliability and usability.Results: Phase I demonstrated improvement in VHVs' oral health assessment skills,with almost perfect agreement with dentists. In Phase II, VHVs spent an average of5.58 minutes on screenings, showing moderate to almost perfect agreement withdentists. Sensitivity and specificity values exceeded 80%, indicating high accuracy inassessments.Conclusion: The T-OHAT mobile application effectively trained VHVs in identifyingoral health problems and shows potential for broader use among healthcareprofessionals. Ongoing refinement aims to enhance its capability in detecting oralhealth issues among vulnerable populations. Further studies with larger sample sizesare needed to validate its effectiveness in real-world settings.
DOI: 10.14457/tu.the.2023.1213
title: Who get referred to gerodontology and special care dentistry clinic, Thammasat Hospital, Thailand, and why: a mixed-method study

description: There has been no study addressing referral reasons to Gerodontology and special care dentistry (GD/SCD) clinic in Thailand. This study aims for studying GD/SCD patient’s profile of GD/SCD clinic of Thammasat University Hospital (TUH), and explored referral reasons from perspectives of dentists and dental supporting staff. We first reviewed electronic medical record (EMR) of the year 2019 and later conducted in-depth interviews with 12 dentists and supporting staff. EMR reported that the majority of TUH GD/SCD patients were a young-old group who had 5.1±3.8 medical comorbidities and took 8.2+5.5 medications on average (mean age = 69.1±10.1, min-max=13-92 years old). The majority of our patients (70%) were eligible for a civil servant health insurance; while 20% of the all patients unfortunately had to pay out-of-pocket even though they had some type of health insurance. Almost 1/3 of the EMR did not reveal referral reasons. For those with written consultation notes available, we found common themes also with the interview findings such as complex dental problem (rampant caries), being dependent, and uncooperative behaviors. Shorter waiting time for denture fabrication was also identified. In addition, interview findings revealed further detail that dentists were struggled with the proper treatment planning, competing agenda of efficiency and productivity under the time limit, and the influence of specialty-oriented schedule. Unlike existing reports from elsewhere, we found no barriers from ageism or lack of financial incentive; our participants showed empathy/sympathy towards the patients and referred to GD/SCD as they explained that GD/SCD had 1) specialized equipment and skills, 2) availability and ease of referral, and 3) comprehensive care approach.
DOI: 10.14457/tu.the.2023.1214
title: Comparison the cost-effectiveness of orthognathic surgery treatment between orthodontics-first and surgery-first approaches in the surgical phase in Thammasat University Hospital

description: This retrospective cohort study aims to evaluate the costs and advantages of the surgicalphase of the surgery-first approach (SFA) versus the orthodontic-first approach (OFA). In total,70 patients were treated; half of the patients were treated via the SFA, and another halfwere treated via the OFA. The information collected included operative cost, operative time,total hospital cost, and length of hospital stay. Effectiveness was determined based onquality of life, which was measured with the Orthognathic Quality of Life Questionnaire ThaiVersion (OQLQ) before and 6 months after treatment. The cost-effectiveness was assessedwith an incremental cost-effectiveness ratio (ICER) and an incremental time effectivenessratio (ITER). The ICER of operative cost revealed an increase of 345.55 baht per OQLQ pointgained, and the ITER of operative time revealed a minimally higher operative time of 2.58minutes per OQLQ compared between SFA and OFA. The results indicate the interventioncost and time of SFA are slightly higher but more effective than those of OFA. However, theoperative cost (P=0.375), operative time (P=0.556), total hospital cost (P=0.363), andRef. code: 25666413030435JEFlength of hospital stay (P=0.643) and OQLQ scores (P=0.344) of both groups are notsignificantly different. Thus, if the proper criteria are to use both SFA and OFA, thedecision to plan treatment depends on the preferences of the patient and clinician.Although the previous study showed significantly more intraoperative time spent inthe SFA group, this study shows no significant difference between SFA and OFA.Moreover, the SFA has higher outcomes (QOL score). Depending on the result of thisstudy, SFA treatment planning is a good choice for orthognathic treatment. This studyconcerns only the surgical phase of orthognathic treatment; it may be better to do along-term study of total treatment time in the future.
DOI: 10.14457/tu.the.2023.1215
title: Assessing of setting, flexural strength, ion release and surface microhardness of novel glass ionomer cements with self-healing properties

description: Objective: The objective of this study was to compare the setting kinetic, staticphysical/mechanical properties, and ion release of the recently developed conventionalglass ionomer cement contained elastomeric micelles (Deltafil, DF) with the commercialconventional glass ionomer cement (EQUIA Forte; EF, Fuji IX; F9, Ketac Molar; KM).Materials and method: The acid-base reaction of the materials was determined usingFTIR-ATR (n=3). Biaxial flexural strength/modulus (n=10) and Vickers surfacemicrohardness (n=5) were determined after immersion in water for 24 h and 4 weeks. Ionrelease was analyzed using fluoride-specific electrodes and ICP-OES (n=5).Results: The extrapolated degree of acid-base neutralization of all materials wascomparable (~97%) (p&gt;0.05). Additionally, DF exhibited the highest BFS, which wassignificantly higher than that of EF, F9, and KM. The highest fluoride release wasobserved with EF, followed by F9, KM, and DF. However, DF had significantly lowest5Vickers microhardness values compared to other materials tested. For the cumulative ionrelease, concentrations of Al, P, and Sr were all detected, but a higher amount of Sr wasobserved from DF compared to other materials tested.Conclusion: The recently developed conventional GIC with added elastomeric micellesexhibited a satisfactory setting reaction and mechanical properties but with lower fluoriderelease. Therefore, this material may not be suitable for patients with high caries risk, butit may be indicated for use in moderate-high loading areas where mechanical strength isa primary concern in clinical conditions.