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Huang B, Estai M, Pungchanchaikul P, Quick K, Ranjitkar S, Fashingbauer E, Askar A, Wang J, Diefalla F, Shenouda M, Seyffer D, Louie JP. Mobile Health Assessment of Traumatic Dental Injuries Using Smartphone-Acquired Photographs: A Multicenter Diagnostic Accuracy Study. Telemed J E Health 2024. [PMID: 38946689 DOI: 10.1089/tmj.2024.0012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2024] Open
Abstract
Background: Mobile health (mHealth) has an emerging potential for remote assessment of traumatic dental injuries (TDI) and support of emergency care. This study aimed to determine the diagnostic accuracy of TDI detection from smartphone-acquired photographs. Methods: The upper and lower anterior teeth of 153 individuals aged ≥ 6 years were photographed using a smartphone camera app. The photos of 148 eligible participants were reviewed independently by a dental specialist, two general dentists, and two dental therapists, using predetermined TDI classification and criteria. The sensitivity, specificity, accuracy, positive predictive value, negative predictive value, and inter-rater reliability were estimated to evaluate the diagnostic performance of the photographic method relative to the reference standard established by the dental specialist. Results: Of the 1,870 teeth screened, one-third showed TDI; and one-seventh of the participants had primary or mixed dentitions. Compared between the specialist's reference standard and four dental professionals' reviews, the diagnostic sensitivity and specificity for TDI versus non-TDI were 59-95% and 47-93%, respectively, with better performance for urgent types of TDI (78-89% and 99-100%, separately). The diagnostic consistency was also better for the primary/mixed dentitions than the permanent dentition. Conclusion: This study suggested a valid mHealth practice for remote assessment of TDI. A better diagnostic performance in the detection of urgent types of TDI and examination of the primary/mixed dentition was also reported. Future directions include professional development activities involving dental photography and photographic assessment, incorporation of a machine learning technology to aid photographic reviews, and randomized controlled trials in multiple clinical settings.
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Affiliation(s)
- Boyen Huang
- University of Minnesota School of Dentistry, Minneapolis, Minnesota, USA
| | - Mohamed Estai
- School of Human Sciences, The University of Western Australia, Perth, Australia
| | | | - Karin Quick
- University of Minnesota School of Dentistry, Minneapolis, Minnesota, USA
| | - Sarbin Ranjitkar
- Adelaide Dental School, University of Adelaide, Adelaide, Australia
| | - Emily Fashingbauer
- University of Minnesota School of Dentistry, Minneapolis, Minnesota, USA
- College of Allied Health and Nursing, Minnesota State University, Mankato, Minnesota, USA
| | - Abdirahim Askar
- University of Minnesota School of Dentistry, Minneapolis, Minnesota, USA
| | - Josiah Wang
- University of Minnesota School of Dentistry, Minneapolis, Minnesota, USA
| | - Fatma Diefalla
- University of Minnesota School of Dentistry, Minneapolis, Minnesota, USA
| | - Margaret Shenouda
- University of Minnesota College of Liberal Arts, Minneapolis, Minnesota, USA
| | - Danae Seyffer
- University of Minnesota School of Dentistry, Minneapolis, Minnesota, USA
| | - Jeffrey P Louie
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, Minnesota, USA
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Al-Seelawi Z, Hermann NV, Peutzfeldt A, Baram S, Bakke M, Sonnesen L, Tsakanikou A, Rahiotis C, Benetti AR. Clinical and digital assessment of tooth wear. Sci Rep 2024; 14:592. [PMID: 38182632 PMCID: PMC10770026 DOI: 10.1038/s41598-023-50107-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 12/15/2023] [Indexed: 01/07/2024] Open
Abstract
The aim of this study was to compare the assessment of tooth wear performed on digital models with the one conducted at the clinical examination. Seventy-eight volunteers (29 males and 49 females, age range 20-30 years) with at least 24 teeth, normal oral function, and a neutral transverse relationship were examined. During the clinical examination, dental wear was registered according to the Basic Erosive Wear Examination (BEWE) index. Subsequently, the BEWE index was blindly applied by two examiners on digital models obtained from the volunteers. Data were analyzed using weighted Cohen's kappa coefficient and correlation tests with a confidence interval of 95%. All volunteers showed signs of tooth wear. Anterior teeth showed increased severity of tooth wear than first molars. Early loss of tooth substance could be identified on the digital models, including in areas with challenging direct intraoral visual access. Approximately 50% of the scores based on clinical examination agreed with those based on examination of digital models (k = 0.543, p < 0.01). A moderate, positive correlation was observed between scores registered clinically and on digital models (Spearman's rho = 0.560, p < 0.001). Considering the rather low agreement between the clinical and digital scores, alternatives to using BEWE on digital models are needed.
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Affiliation(s)
- Zahra Al-Seelawi
- Section of Dental Materials, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Nørre Allé 20, DK-2200, Copenhagen, Denmark
| | - Nuno V Hermann
- Section of Pediatric Dentistry and Clinical Genetics, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Anne Peutzfeldt
- Section of Dental Materials, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Nørre Allé 20, DK-2200, Copenhagen, Denmark
- Department of Preventive, Restorative and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Sara Baram
- Section of Clinical Oral Physiology, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Merete Bakke
- Section of Clinical Oral Physiology, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Liselotte Sonnesen
- Section of Orthodontics, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Angeliki Tsakanikou
- Department of Operative Dentistry, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Christos Rahiotis
- Department of Operative Dentistry, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Ana R Benetti
- Section of Dental Materials, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Nørre Allé 20, DK-2200, Copenhagen, Denmark.
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Mitrirattanakul S, Neoh SP, Chalarmchaichaloenkit J, Limthanabodi C, Trerayapiwat C, Pipatpajong N, Taechushong N, Chintavalakorn R. Accuracy of the Intraoral Scanner for Detection of Tooth Wear. Int Dent J 2022; 73:56-62. [PMID: 35931558 PMCID: PMC9875261 DOI: 10.1016/j.identj.2022.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 01/29/2023] Open
Abstract
OBJECTIVE The aim of this work was to study the accuracy of the intraoral scanner for detection of tooth wear in natural teeth by using micro-computed tomography (micro-CT) as a gold standard. MATERIALS AND METHODS Twenty premolars were prepared, fixed in acrylic blocks, and scanned with an intraoral scanner (iTero Element® 2) and micro-CT for baseline reference images before artificial tooth wear induction. The samples were then scrubbed with abrasive sandpaper 20 times and scanned with the intraoral scanner. They were then superimposed with the reference images utilising the "TimeLapse" feature of the scanner until the abraded area appeared yellow, indicating tooth surface loss in the 50-200 μm range. The same samples were then rescanned by micro-CT to measure the actual tooth surface loss. This procedure was repeated for the subsequent experimental tooth surface loss of 200-400 μm range (orange areas) and 400-750 μm range (red areas). The collected data were analysed for sensitivity, positive predictive value (PPV), and accuracy. Level of statistical significance was set at .05. RESULTS In the detection of experimental tooth surface loss, the specificity, PPV, and accuracy of the intraoral scanner were 98%, 98%, and 97%, respectively. CONCLUSIONS The iTero® intraoral scanner can be recommended to be a suitable screening tool for tooth wear in routine dental practice.
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Affiliation(s)
- Somsak Mitrirattanakul
- Department of Masticatory Science, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Siew Peng Neoh
- Department of Orthodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | | | | | | | | | | | - Rochaya Chintavalakorn
- Department of Orthodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
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Silvester CM, Kullmer O, Hillson S. A dental revolution: The association between occlusion and chewing behaviour. PLoS One 2021; 16:e0261404. [PMID: 34910787 PMCID: PMC8673603 DOI: 10.1371/journal.pone.0261404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 12/01/2021] [Indexed: 11/19/2022] Open
Abstract
Dentistry is confronted with the functional and aesthetic consequences that result from an increased prevalence of misaligned and discrepant dental occlusal relations in modern industrialised societies. Previous studies have indicated that a reduction in jaw size in response to softer and more heavily processed foods during and following the Industrial Revolution (1,700 CE to present) was an important factor in increased levels of poor dental occlusion. The functional demands placed on the masticatory system play a crucial role in jaw ontogenetic development; however, the way in which chewing behaviours changed in response to the consumption of softer foods during this period remains poorly understood. Here we show that eating more heavily processed food has radically transformed occlusal power stroke kinematics. Results of virtual 3D analysis of the dental macrowear patterns of molars in 104 individuals dating to the Industrial Revolution (1,700-1,900 CE), and 130 of their medieval and early post-medieval antecedents (1,100-1,700 CE) revealed changes in masticatory behaviour that occurred during the early stages of the transition towards eating more heavily processed foods. The industrial-era groups examined chewed with a reduced transverse component of jaw movement. These results show a diminished sequence of occlusal contacts indicating that a dental revolution has taken place in modern times, involving a dramatic shift in the way in which teeth occlude and wear during mastication. Molar macrowear suggests a close connection between progressive changes in chewing since the industrialization of food production and an increase in the prevalence of poor dental occlusion in modern societies.
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Affiliation(s)
| | - Ottmar Kullmer
- Department of Paleoanthropology, Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt, Germany
- Department of Palaeobiology and Environment, Institute of Ecology, Evolution, and Diversity, Johann Wolfgang Goethe University, Frankfurt, Germany
| | - Simon Hillson
- Institute of Archaeology, University College London, London, United Kingdom
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Kapoor P, Chowdhry A, Popli DB. Orthodontists in forensic facial approximation (FFA): current inter-disciplinary perspective. EGYPTIAN JOURNAL OF FORENSIC SCIENCES 2021. [DOI: 10.1186/s41935-021-00255-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
AbstractForensic odontology has contributed significantly in forensic investigations and involves various branches of dentistry including orthodontics. The current communication presents evidence-based perspective highlighting synergistic union of different specialties for Forensic Facial Approximation (FFA). It brings forth commonality in principles of anthropology, forensic science, anthropometry, anatomy, paleontology, forensic odontology, with orthodontics, used in FFA. Various attributes and skills of orthodontists’ aid in dental and skull profiling and the corresponding sex, age, and ethnicity-based soft tissue assessments for facial soft tissue thickness (FSTT), may aid a life-like appearance. They can assist hard tissue profiling by their expertise in growth of skeletal and soft tissue, along with the evolutionary trends in occlusion, and diet formulations. Their knowledge in identifying teeth patterns, dental/skeletal jaw relationships, cranial/facial indices, vertical/horizontal facial proportions, can help prepare skull for orientation and reconstruction. The dental, photographic, and radiographic records maintained by orthodontists and general dentists are instrumental in data retrieval, used in various software, clinical, or research areas. These can provide normative values for comparative analysis or facial recreation. The orthodontists can also assist anthropologists and forensic specialists in the virtual reconstructions due to their ease in using latest digital technologies including three-dimensional (3D) facial scan, stereo-photogrammetry, 3D printing, automated soft-tissue landmarks, growth, and age predictions. Thus, the current study established the commonality in concepts of various forensic disciplines with orthodontics, which can strengthen both forensic on-field facial approximations and hard/soft tissue research to further enhance the accuracy of contemporary digital software used in FFA.
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Lee J, Fung S, Yong R, Ranjitkar S, Kaidonis J, Evans AR, Fiorenza L. Tooth wear development in the Australian Aboriginal dentition from Yuendumu: A longitudinal study. PLoS One 2021; 16:e0254151. [PMID: 34242291 PMCID: PMC8270463 DOI: 10.1371/journal.pone.0254151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 06/22/2021] [Indexed: 11/29/2022] Open
Abstract
The analysis of dental wear, at both the microscopic and macroscopic scale, is one of the most widely used tools in archeology and anthropology to reconstruct the diet and lifestyle of past human populations. Biomechanical studies have indicated that tooth wear helps to dissipate the mechanical load over the crown surface, thus reducing the risk of tooth fracture. To date, there are only a few studies that have examined functional tooth wear variation in modern humans. Here we propose to study masticatory efficiency through the use of the Occlusal Fingerprint Analysis method, a well-developed digital approach that allows the reconstruction of the occlusal dynamics occurring during mastication. The aim of this study is to provide the first longitudinal quantitative data of molar and premolar macrowear patterns within a functional context. We examined the mixed and permanent dentition of one Australian Aboriginal child (from ages 8 to 17) from Yuendumu, using high-resolution surface scans of dental casts including both upper and lower arches. Our results suggest that the occlusal macrowear patterns of this individual did not significantly change through time. Occlusal contact parameters such as functional area, inclination and direction remain relatively unaltered throughout childhood and adolescence, indicating little change in the masticatory function of this individual. The functional tooth wear pattern in this individual did not change longitudinally indicating the degree of masticatory efficiency has most probably remained unaltered.
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Affiliation(s)
- Jinyoung Lee
- Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria, Australia
| | - Sarah Fung
- Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria, Australia
| | - Robin Yong
- Adelaide Dental School, University of Adelaide, Adelaide, South Australia, Australia
| | - Sarbin Ranjitkar
- Adelaide Dental School, University of Adelaide, Adelaide, South Australia, Australia
| | - John Kaidonis
- Adelaide Dental School, University of Adelaide, Adelaide, South Australia, Australia
| | - Alistair R. Evans
- School of Biological Sciences, Monash University, Melbourne, Victoria, Australia
- Geosciences, Museums Victoria, Melbourne, Victoria, Australia
| | - Luca Fiorenza
- Department of Anatomy and Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria, Australia
- Earth Sciences, University of New England, Armidale, New South Wales, Australia
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Bompolaki D, Edmondson SA, Katancik JA. Interproximal contact loss between implant-supported restorations and adjacent natural teeth: A retrospective cross-sectional study of 83 restorations with an up to 10-year follow-up. J Prosthet Dent 2020; 127:418-424. [PMID: 33342612 DOI: 10.1016/j.prosdent.2020.09.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 09/14/2020] [Accepted: 09/14/2020] [Indexed: 10/22/2022]
Abstract
STATEMENT OF PROBLEM Interproximal contact loss between implant-supported restorations and adjacent natural teeth is a frequently encountered complication that could negatively affect surrounding tissues and/or patient satisfaction with treatment. The effect of interproximal contact loss on peri-implant tissue health and patient awareness of food impaction is currently unknown. PURPOSE The purpose of this retrospective cross-sectional study was to explore the effect of interproximal contact loss on peri-implant tissue health and determine whether interproximal contact loss leads to increased patient awareness of food impaction around the affected area. This study also aimed to identify whether specific patient or local factors could cause interproximal contact loss. MATERIAL AND METHODS Eighty-three participants with posterior single-unit implant-supported restorations were examined. The mean follow-up time after prosthesis insertion was 4 ±2.2 years (range 4 months to 10.6 years). Interproximal contacts were evaluated by using waxed dental floss. Patient age, sex, implant location, opposing tooth status, presence of endodontically treated adjacent tooth, and regular use of an occlusal device at night were recorded. Peri-implant probing depths and the presence of bleeding on probing were also recorded. Each participant was asked to indicate whether they had noticed increased food impaction around their implant-supported restoration. Statistical analysis included nonparametric Mann-Whitney U tests, the Spearman rank-order correlation, the Pearson chi-squared tests, and the paired t test (α=.05). RESULTS Among all examined mesial contacts, 34.1% were recorded as open, with an overall mesial interproximal contact loss (open and loose contacts combined) incidence of 48.8%. Restorations placed in premolar sites exhibited significantly tighter mesial interproximal contacts compared with those placed in molar sites (U=566, P=.041). A significant negative correlation was found between follow-up time after insertion and mesial contact tightness (rs=-0.226, P=.041). CONCLUSIONS Interproximal contact loss appears to increase over time, with more surfaces being affected after longer periods of service. This study did not find an association between interproximal contact loss and peri-implant inflammation as measured by bleeding on probing, with the exception of the distolingual implant surface. Participants with interproximal contact loss were more aware of food impaction around their implant crown. Use of an occlusal device at night did not prevent interproximal contact loss.
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Affiliation(s)
- Despoina Bompolaki
- Associate Professor, Department of Restorative Dentistry, Oregon Health & Science University, Portland, Ore.
| | - Sara A Edmondson
- Resident, Graduate Orthodontics Program, The University of Tennessee Health Science Center, Memphis, Tenn
| | - James A Katancik
- Professor and Chair, Department of Periodontology, Oregon Health & Science University, Portland, Ore
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Goodacre CJ, Roberts WE, Goldstein G, Wiens JP. Does the Stomatognathic System Adapt to Changes in Occlusion? Best Evidence Consensus Statement. J Prosthodont 2020; 30:5-11. [PMID: 33350537 DOI: 10.1111/jopr.13310] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 09/28/2020] [Indexed: 12/17/2022] Open
Abstract
PURPOSE The purpose of this Best Evidence Consensus Statement was to evaluate the existing literature on the stomatognathic system's ability to adapt to occlusal changes. MATERIALS AND METHODS The search term stomatognathic system was not useful as it resulted in over 400,000 results nor was the search term temporomandibular joint adaptation with 738 results due to the large number of references not related to the topic. The terms stomatognathic system adaptation to occlusal changes (186 results), teeth flexion (139 results), muscle adaptation to dental occlusion (278 results), and occlusal changes and neuroplasticity (11 results) provided the best selection of articles related to the topic. Limiting the above searches to systematic reviews and randomized controlled clinical trials resulted in multiple publications that were related to the question.9-13 Other literature reviews, data-based publications, and expert opinion resources have been included due to their relationship to the question. RESULTS From the extensive list of search results, 242 articles were determined to be potentially related to the focus question and were evaluated with 56 being included in this paper. It was determined that the stomatognathic system adapts to occlusal changes through the temporomandibular joint, muscles, teeth and bone. The dynamically modified periosteum on the articulator surfaces of the condyle and fossa has a unique load-bearing morphology with 3 subarticular layers of fibrocartilage that absorb and dissipate both peak (impact) and sustained loads. Adaptability of the TMJs and muscles can be documented through studies where artificially produced occlusal interferences were placed in patients and those study participants with normal temporomandibular joints (TMJs) adapted fairly well whereas those with a previous history of temporomandibular disorders (TMD) did not adapt as well. CONCLUSIONS Available evidence indicates patients generally adapt to the occlusal change inherent in orthodontic treatment, mandibular advancement surgery, and the use of mandibular advancement devices. The head and neck muscles also adapt to occlusal changes in patients without a history of TMD. The dentition adapts to changes through the bone and periodontal ligaments as well as the ability of teeth to undergo slight flexion under masticatory loading. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Charles J Goodacre
- Distinguished Professor, Advanced Education Program in Implant Dentistry, Loma Linda University School of Dentistry, Loma Linda, CA
| | - W Eugene Roberts
- Professor Emeritus of Orthodontics, Adjunct Professor, Mechanical Engineering, Indiana University & Purdue University, Indianapolis, IN
| | | | - Jonathan P Wiens
- Adjunct Clinical Professor, Department of Restorative Dentistry, University of Detroit Mercy School of Dentistry, Detroit, Michigan
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9
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Yen JY, Kang L, Chou IC, Lai YL, Lee SY. Risk assessment of interproximal contact loss between implant-supported fixed prostheses and adjacent teeth: A retrospective radiographic study. J Prosthet Dent 2020; 127:86-92. [PMID: 33172648 DOI: 10.1016/j.prosdent.2020.06.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/16/2020] [Accepted: 06/16/2020] [Indexed: 11/19/2022]
Abstract
STATEMENT OF PROBLEM Studies of interproximal contact loss (ICL) associated with implant-supported fixed prostheses (ISFPs) have typically used dental floss or metal strips to determine ICL and have shown a high prevalence of 34% to 66%, which does not match the authors' experience. Moreover, the implant prosthetic factors contributing to ICL have seldom been reported. PURPOSE The purpose of this clinical study was to examine follow-up radiographs of ISFPs to determine the prevalence of open contacts between the ISFP and adjacent teeth and to assess the risk factors associated with ICL at patient, implant prosthesis, and adjacent tooth levels. MATERIAL AND METHODS Patients treated with ISFPs at a single clinical center were included. Digital radiographs obtained at the time of ISFP delivery and subsequent follow-up were assessed, and a total of 180 ISFPs with 296 interproximal contacts in 147 patients were screened for analyses. The prevalence and risk factors of ICL at the levels of patient (age, sex, diabetes, smoking, and bruxism), implant prosthesis (follow-up period, arch location, splinting, ceramic or metal materials, screw or cement-retained, and abutment-fixture connection), and adjacent tooth (mesial or distal side, contact with unrestored tooth, composite resin restoration, or fixed prosthesis, vitality, bone height, and contralateral spacing) were analyzed with logistic regressions and generalized estimating equation (GEE) analyses (α=.05). RESULTS The onset of ICL was from 6 to 96 months after ISFP delivery. The prevalence of ICL at the patient level was 15.0%, at the implant prosthesis level 13.3%, and at the adjacent tooth levels 8.8%. Twenty-six of the participants had 2 or more ISFPs. The multivariable GEE analysis reported that sex at patient level; longer follow-up period and implant prostheses with external hexagonal and internal octagonal connections at implant prosthesis level; and contralateral spacing, contact with composite resin filling and mesial side of ISFP at adjacent tooth level were significant risk factors of ICL, where contralateral spacing had the highest adjusted odds ratio of 20.88 (P=.002). CONCLUSIONS Most of the ICL were found at the mesial side of ISFPs, and the odds of ICL was significant in participants with longer follow-up periods. Internal hexagonal connections reported relatively lower risk than others. Factors relevant to the anterior component of occlusal force, such as male sex, contralateral spacing at adjacent tooth, and proximal contact of ISFP with resin filling, seem to be high risk factors for ICL.
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Affiliation(s)
- Jui-Ying Yen
- Attending Doctor, Department of Dentistry, Yangming branch of Taipei City Hospital, Taipei, Taiwan, Republic of China; Graduate student, Department of Dentistry, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - Lei Kang
- Attending Doctor, Department of Dentistry, National Yang-Ming University Hospital, Yilan City, Taiwan, Republic of China
| | - I-Chiang Chou
- Chairperson, Department of Dentistry, Yangming branch of Taipei City Hospital, Taipei, Taiwan, Republic of China
| | - Yu-Lin Lai
- Chairperson, Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan, Republic of China
| | - Shyh-Yuan Lee
- Professor, Department of Dentistry, National Yang-Ming University, Taipei, Taiwan, Republic of China; Attending Doctor, Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan, Republic of China; Researcher, Department of Dentistry, Taipei City Hospital, Taipei, Taiwan, Republic of China.
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10
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Baldissara P, Monaco C, Onofri E, Fonseca RG, Ciocca L. Fatigue resistance of monolithic lithium disilicate occlusal veneers: a pilot study. Odontology 2019; 107:482-490. [PMID: 30840218 DOI: 10.1007/s10266-019-00417-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 02/20/2019] [Indexed: 10/27/2022]
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11
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Restoring Large Defect of Posterior Tooth by Indirect Composite Technique: A Case Report. Dent J (Basel) 2018; 6:dj6040054. [PMID: 30301256 PMCID: PMC6313494 DOI: 10.3390/dj6040054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 10/02/2018] [Accepted: 10/04/2018] [Indexed: 11/24/2022] Open
Abstract
Advances in adhesive dentistry have led to increased use of indirect restorations. In some situations, indirect composite techniques are more advantageous than direct composite filling techniques, such as establishing proper occlusal and interproximal anatomy, reducing polymerization shrinkage stress, and promoting the degree of conversion. This article presents a case about restoring the lower right first molar with extensive loss of tooth structure by the composite onlay to achieve a proper anatomic form and rehabilitate chewing function. This one-year clinical case encourages clinicians to manage large decay of posterior tooth conservatively. The given functional and esthetic outcomes demonstrate the promising applicability of the indirect composite technique.
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Yong R, Ranjitkar S, Lekkas D, Halazonetis D, Evans A, Brook A, Townsend G. Three‐dimensional (3D) geometric morphometric analysis of human premolars to assess sexual dimorphism and biological ancestry in Australian populations. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2018; 166:373-385. [DOI: 10.1002/ajpa.23438] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 01/28/2018] [Accepted: 01/29/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Robin Yong
- Adelaide Dental SchoolUniversity of AdelaideAdelaide South Australia 5005 Australia
| | - Sarbin Ranjitkar
- Adelaide Dental SchoolUniversity of AdelaideAdelaide South Australia 5005 Australia
| | - Dimitra Lekkas
- Adelaide Dental SchoolUniversity of AdelaideAdelaide South Australia 5005 Australia
| | - Demetrios Halazonetis
- School of DentistryNational and Kapodistrian University of AthensAthens 11527 Greece
| | - Alistair Evans
- School of Biological SciencesMonash UniversityClayton Victoria 3800 Australia
| | - Alan Brook
- Adelaide Dental SchoolUniversity of AdelaideAdelaide South Australia 5005 Australia
- Institute of DentistryQueen Mary University of LondonLondon E1 4NS United Kingdom
| | - Grant Townsend
- Adelaide Dental SchoolUniversity of AdelaideAdelaide South Australia 5005 Australia
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13
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Watson JT, Haas R. Dental evidence for wild tuber processing among Titicaca Basin foragers 7000 ybp. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2017; 164:117-130. [DOI: 10.1002/ajpa.23261] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 05/19/2017] [Accepted: 05/22/2017] [Indexed: 11/11/2022]
Affiliation(s)
- James T. Watson
- Arizona State Museum, University of Arizona; Tucson Arizona 85721
- School of Anthropology; University of Arizona; Tucson Arizona 85721
| | - Randall Haas
- Department of Anthropology; University of California; Davis California 95616
- Collasuyo Archaeological Research Institute; Puno Peru
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Ranjitkar S, Turan A, Mann C, Gully GA, Marsman M, Edwards S, Kaidonis JA, Hall C, Lekkas D, Wetselaar P, Brook AH, Lobbezoo F, Townsend GC. Surface-Sensitive Microwear Texture Analysis of Attrition and Erosion. J Dent Res 2016; 96:300-307. [PMID: 27927887 DOI: 10.1177/0022034516680585] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Scale-sensitive fractal analysis of high-resolution 3-dimensional surface reconstructions of wear patterns has advanced our knowledge in evolutionary biology, and has opened up opportunities for translatory applications in clinical practice. To elucidate the microwear characteristics of attrition and erosion in worn natural teeth, we scanned 50 extracted human teeth using a confocal profiler at a high optical resolution (X-Y, 0.17 µm; Z < 3 nm). Our hypothesis was that microwear complexity would be greater in erosion and that anisotropy would be greater in attrition. The teeth were divided into 4 groups, including 2 wear types (attrition and erosion) and 2 locations (anterior and posterior teeth; n = 12 for each anterior group, n = 13 for each posterior group) for 2 tissue types (enamel and dentine). The raw 3-dimensional data cloud was subjected to a newly developed rigorous standardization technique to reduce interscanner variability as well as to filter anomalous scanning data. Linear mixed effects (regression) analyses conducted separately for the dependent variables, complexity and anisotropy, showed the following effects of the independent variables: significant interactions between wear type and tissue type ( P = 0.0157 and P = 0.0003, respectively) and significant effects of location ( P < 0.0001 and P = 0.0035, respectively). There were significant associations between complexity and anisotropy when the dependent variable was either complexity ( P = 0.0003) or anisotropy ( P = 0.0014). Our findings of greater complexity in erosion and greater anisotropy in attrition confirm our hypothesis. The greatest geometric means were noted in dentine erosion for complexity and dentine attrition for anisotropy. Dentine also exhibited microwear characteristics that were more consistent with wear types than enamel. Overall, our findings could complement macrowear assessment in dental clinical practice and research and could assist in the early detection and management of pathologic tooth wear.
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Affiliation(s)
- S Ranjitkar
- 1 School of Dentistry, University of Adelaide, Adelaide, Australia
| | - A Turan
- 2 Department of Oral Kinesiology, Academic Centre for Dentistry Amsterdam, University of Amsterdam, and MOVE Research Institute Amsterdam, VU University Amsterdam, Amsterdam, Netherlands
| | - C Mann
- 1 School of Dentistry, University of Adelaide, Adelaide, Australia
| | - G A Gully
- 3 School of Biological Sciences, Flinders University, Bedford Park, Australia
| | - M Marsman
- 2 Department of Oral Kinesiology, Academic Centre for Dentistry Amsterdam, University of Amsterdam, and MOVE Research Institute Amsterdam, VU University Amsterdam, Amsterdam, Netherlands
| | - S Edwards
- 4 Adelaide Health Technology Assessment, School of Public Health, University of Adelaide, Adelaide, Australia
| | - J A Kaidonis
- 1 School of Dentistry, University of Adelaide, Adelaide, Australia
| | - C Hall
- 5 Future Industries Institute, University of South Australia, Mawson Lakes, Australia
| | - D Lekkas
- 1 School of Dentistry, University of Adelaide, Adelaide, Australia
| | - P Wetselaar
- 2 Department of Oral Kinesiology, Academic Centre for Dentistry Amsterdam, University of Amsterdam, and MOVE Research Institute Amsterdam, VU University Amsterdam, Amsterdam, Netherlands
| | - A H Brook
- 1 School of Dentistry, University of Adelaide, Adelaide, Australia.,6 Institute of Dentistry, Queen Mary University of London, London, UK
| | - F Lobbezoo
- 2 Department of Oral Kinesiology, Academic Centre for Dentistry Amsterdam, University of Amsterdam, and MOVE Research Institute Amsterdam, VU University Amsterdam, Amsterdam, Netherlands
| | - G C Townsend
- 1 School of Dentistry, University of Adelaide, Adelaide, Australia
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15
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Peck CC. Biomechanics of occlusion - implications for oral rehabilitation. J Oral Rehabil 2015; 43:205-14. [DOI: 10.1111/joor.12345] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/05/2015] [Indexed: 11/26/2022]
Affiliation(s)
- C. C. Peck
- Faculty of Dentistry; The University of Sydney; Sydney NSW Australia
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16
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Townsend GC, Brook AH. The face, the future, and dental practice: how research in craniofacial biology will influence patient care. Aust Dent J 2014; 59 Suppl 1:1-5. [PMID: 24646132 DOI: 10.1111/adj.12157] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
It has been a privilege to assemble a group of Australian and international researchers to produce a special issue of the Australian Dental Journal that reflects the cutting edge of research in different aspects of craniofacial biology, and also considers how these advances will influence future education and practice within dentistry. The aim of this special issue is to provide a collection of concept papers and critical reviews on key topics that cover both fundamental and applied research in craniofacial biology and to consider the clinical implications. To do this, four questions have been addressed that lead to the four sections of this issue. These are: How have we come to the present exciting position in craniofacial biology with breakthroughs over the past 50 years? What are current fundamental research topics that are helping us to understand more about craniofacial and general development, possibly leading to future clinical developments? What are the current applied research topics that will influence future clinical practice? Looking forward, what new developments in craniofacial biology may come about that will change the face of dental education and practice? The refereed papers in this special issue are grouped into the four sections that seek to respond to these demanding questions.
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Affiliation(s)
- G C Townsend
- School of Dentistry, The University of Adelaide, South Australia, Australia
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17
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Brook AH, O'Donnell MB, Hone A, Hart E, Hughes TE, Smith RN, Townsend GC. General and craniofacial development are complex adaptive processes influenced by diversity. Aust Dent J 2014; 59 Suppl 1:13-22. [PMID: 24617813 DOI: 10.1111/adj.12158] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Complex systems are present in such diverse areas as social systems, economies, ecosystems and biology and, therefore, are highly relevant to dental research, education and practice. A Complex Adaptive System in biological development is a dynamic process in which, from interacting components at a lower level, higher level phenomena and structures emerge. Diversity makes substantial contributions to the performance of complex adaptive systems. It enhances the robustness of the process, allowing multiple responses to external stimuli as well as internal changes. From diversity comes variation in outcome and the possibility of major change; outliers in the distribution enhance the tipping points. The development of the dentition is a valuable, accessible model with extensive and reliable databases for investigating the role of complex adaptive systems in craniofacial and general development. The general characteristics of such systems are seen during tooth development: self-organization; bottom-up emergence; multitasking; self-adaptation; variation; tipping points; critical phases; and robustness. Dental findings are compatible with the Random Network Model, the Threshold Model and also with the Scale Free Network Model which has a Power Law distribution. In addition, dental development shows the characteristics of Modularity and Clustering to form Hierarchical Networks. The interactions between the genes (nodes) demonstrate Small World phenomena, Subgraph Motifs and Gene Regulatory Networks. Genetic mechanisms are involved in the creation and evolution of variation during development. The genetic factors interact with epigenetic and environmental factors at the molecular level and form complex networks within the cells. From these interactions emerge the higher level tissues, tooth germs and mineralized teeth. Approaching development in this way allows investigation of why there can be variations in phenotypes from identical genotypes; the phenotype is the outcome of perturbations in the cellular systems and networks, as well as of the genotype. Understanding and applying complexity theory will bring about substantial advances not only in dental research and education but also in the organization and delivery of oral health care.
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Affiliation(s)
- A H Brook
- School of Dentistry, The University of Adelaide, South Australia, Australia; Institute of Dentistry, Queen Mary University of London, United Kingdom
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