Prevention and Management of Tooth Wear: The Role of Dental Technology

2016 ◽  
Vol 5 (3) ◽  
pp. 30-34 ◽  
Author(s):  
James Ij Green
Keyword(s):  
Ethylene Vinyl Acetate ◽  
Tooth Wear ◽  
Dental Erosion ◽  
Tooth Surface ◽  
Contact Erosion ◽  
Other Substances ◽  
Substance Loss ◽  
Removable Appliances ◽  
Dental Technology

Tooth wear is a multifactorial condition and the term is used to describe all types of non-carious tooth substance loss: abrasion (produced by interaction between the teeth and other substances), attrition (produced during tooth-to-tooth contact), erosion (produced by a chemical process) and abfraction (produced through abnormal occlusal loading that predisposes tooth substance to mechanical and chemical wear). Dental technology has an important role in preventing, managing and monitoring tooth wear in a variety of ways. Hard poly(methyl methacrylate) or soft ethylene-vinyl acetate splints can be prescribed to alleviate bruxism, the most common cause of attrition. Thermoformed appliances can be used for the application of products that reduce dental erosion such as fluoride gel. Patients with significant tooth surface loss may require laboratory-made restorations, as well as removable appliances with bite planes that generate inter-occlusal space to facilitate restorations, or surgical templates to provide guidance in preparing restorations for those requiring surgical crown lengthening. Dental study models and digitised models can also prove valuable in terms of monitoring the condition. This paper presents a review of the role that dental technology plays in tooth wear prevention, management and monitoring.

scholarly journals Dentition and body condition: tooth wear as a correlate of weight loss in roe deer

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Roberta Chirichella ◽  
Anna Maria De Marinis ◽  
Boštjan Pokorny ◽  
Marco Apollonio
Keyword(s):  
Body Mass ◽  
Body Condition ◽  
Physical Condition ◽  
Roe Deer ◽  
Tooth Wear ◽  
The Body ◽  
Permanent Teeth ◽  
Tooth Surface ◽  
Mandible Length

Abstract Background In many mammalian species, once the permanent teeth have erupted, the only change to dentition is a gradual loss of tooth surface/height through wear. The crown of the teeth cannot be repaired once worn. When dental crown tissue has been depleted due to wear, the animal is expected to have a suboptimal body condition. We evaluated the role of tooth wear in causing a reduction of physical condition in adult roe deer females (Capreolus capreolus). Results The progressive wearing of the lower cheek teeth was assessed in a Northern Apennines (Italy) population with a new scoring scheme based on objectively described tooth characteristics (morphotypes) being either present or absent. Eviscerated body mass and mandible length, which is a good proxy for body size in roe deer, were related to the tooth wear score by the use of linear regressions. The sum of wear scores for molariform teeth correlated most strongly with body condition (i.e., eviscerated body mass/mandible length), showing the importance of the entire chewing surface for acquiring energy by food comminution, chewing, and digestion. In comparison with individuals of comparable size experiencing minor tooth wear, the body mass of those with the most advanced stage of tooth wear was decreased by 33.7%. This method was compared to the height and the hypsodonty index of the first molar, the most commonly used indices of tooth wear. The sum of molariform wear scoring scheme resulted in a more suitable index to describe the variation in body condition of roe deer. Conclusions Describing tooth wear patterns in hunted populations and monitoring at which tooth wear level (and therefore dental morphotype) an animal is no longer able to sustain its physical condition (i.e. when it begins to lose body mass) can be a useful tool for improving the management of the most widespread and abundant deer species in Europe. At the same time, such an approach can clarify the role of tooth wear as a proximate cause of senescence in ungulates.

scholarly journals Dental Erosion

10.2341/09-bl ◽  
2009 ◽  
Vol 34 (3) ◽  
pp. 251-262 ◽  
Author(s):  
A. Lussi ◽  
E. Hellwig ◽  
C. Ganss ◽  
T. Jaeggi
Keyword(s):  
Risk Factors ◽  
Preventive Measures ◽  
Recent Decade ◽  
Tooth Wear ◽  
Dental Erosion ◽  
Oral Rehabilitation ◽  
Clinical Appearance ◽  
Substance Loss ◽  
Potential Interactions ◽  
Dental Professionals

SUMMARY There is some evidence that dental erosion is steadily spreading. To diagnose erosion, dental professionals have to rely on clinical appearance, as there is no device available to detect it. Adequate preventive measures can only be initiated if the different risk factors and potential interactions between them are known. When substance loss, caused by erosive tooth wear, reaches a certain degree, oral rehabilitation becomes necessary. Prior to the most recent decade, the severely eroded dentition could only be rehabilitated by the provision of extensive crown and bridgework or removable dentures. As a result of the improvements in composite restorative materials and in adhesive techniques, it has become possible to rehabilitate eroded dentitions in a less invasive manner.

Maxillary incisor palatal erosion

2005 ◽  
Vol 29 (2) ◽  
pp. 157-164 ◽  
Author(s):  
R.G. Chadwick ◽  
H.L. Mitchell ◽  
S.L. Manton ◽  
S. Ward ◽  
S. Ogston ◽  
...  
Keyword(s):  
Risk Factors ◽  
Structured Interview ◽  
Dental Erosion ◽  
Tooth Surface ◽  
Maxillary Incisor ◽  
Medical Risk ◽  
Medical Risk Factors ◽  
Potential Risk Factors ◽  
Substance Loss ◽  
Topical Fluoride

The objectives of the study were to examine a relationship between tooth erosion affecting the palatal aspects of permanent maxillary central incisors with dietary, behavioral and medical variables. The methods included, 251 schoolchildren aged 11 to 13 years were recruited to participate. Each subject had dental impressions of the palatal aspects of both upper central incisors recorded at baseline, 9 and 18 months intervals. From these, electroconductive replicas were fabricated, mapped and compared using a surface matching technique. At the end of the study all participants underwent a structured interview that sought to assay the level of potential erosive dietary, behavioral and medical risk factors. Correlation analyses of the responses given in the final structured interview with the degrees of palatal tooth substance loss (both previous and measured) were under taken. The results showed: 1. The degree of previous erosion did not predict the level of measured ongoing erosion. 2. Brushing the teeth more frequently with fluoridated toothpaste correlated significantly with lower levels of ongoing erosion (P = 0.011). It was concluded that: 1. Evidence of previous palatal erosion did not predict future erosion. 2. The application of topical fluoride as a by-product of tooth brushing may provide an element of protection against palatal erosion. 3. In view of the lack of correlation between exposure to potential risk factors and the level of ongoing palatal tooth surface loss in this study, other factors (such as an individual’s susceptibility and salivary buffering power) may well be more important predictors. The clinical relevance included: Preventive advice to patients with dental erosion should not only include the use of topical fluoride, in the form of toothpaste, but recognize individual susceptibility to this condition. J Clin Pediatr Dent 29(2): 157-164, 2004

McNamara's Fallacies in Dentistry. 2: Tooth Surface Loss Fallacies

Dental Update ◽  
2021 ◽  
Vol 48 (5) ◽  
pp. 343-356
Author(s):  
Martin GD Kelleher
Keyword(s):  
Clinical Relevance ◽  
Tooth Wear ◽  
Tooth Surface ◽  
Surface Loss ◽  
Substance Loss ◽  
Clinical Cases

Given the number of perceived myths and fallacies in relation to tooth substance loss, this article seeks to address these using a wide variety of clinical cases as examples and by way of scientific references. CPD/Clinical Relevance: The incidence of tooth wear is increasing, so an understanding of the myths and truths surrounding its treatment is valuable.

Pearls From Bones: Relics, Chortens, Tertons and the Signs of Saintly Death in Tibet

Numen ◽  
1994 ◽  
Vol 41 (3) ◽  
pp. 273-324 ◽  
Author(s):  
Dan Martin
Keyword(s):  
Historical Perspective ◽  
Religious Studies ◽  
Religious Culture ◽  
Tibetan Buddhist ◽  
Devotional Practice ◽  
Cultural Pattern ◽  
Other Substances ◽  
Critical Links ◽  
Point Of Departure

AbstractAlthough there has been much work, in recent years, on the sacrum of Christianity, and some important studies have appeared on Buddhist relic cults and related facets of Buddhism, so far very little has been written on Tibetan Buddhist relics. This paper, while offering some material for a historical perspective, mainly seeks to find a larger cultural pattern for understanding the interrelationships of a complex of factors active in Tibetan religious culture. Beginning with problems of relic-related terms and classifications, we then suggest a new assessment of the role of the Terton ('treasure revealer'). Then we discuss 'miracles' in Tibet, and the intersection of categories of 'signs of saintly death' and relics. Much of the remaining pages are devoted to those items that fall within both categories, specifically the 'pearls' that emerge miraculously from saintly remains and images that appear in bodily or other substances connected with cremations. After looking at a number of testimonials on these miraculous relics, we examine the possibility that these items might be 'deceitfully manufactured', looking at a few Tibetan polemical writings which raise this possibility. In the conclusion, we suggest that there are some critical links between three spheres of Tibetan religiosity: 1. sacrum which are not relics, 2. relics, and 3. signs of sainthood. Finally, we recommend an approach to religious studies that takes its point of departure in actual practices, and particularly the objects associated with popular devotional practice.

Influence of the backlash generated by tooth accumulated wear on dynamic behavior of compound planetary gear set

2016 ◽  
Vol 231 (11) ◽  
pp. 2025-2041 ◽  
Author(s):  
Shijing Wu ◽  
Haibo Zhang ◽  
Xiaosun Wang ◽  
Zeming Peng ◽  
Kangkang Yang ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Dynamic Model ◽  
Dynamic Behavior ◽  
Planetary Gear ◽  
Tooth Wear ◽  
Transmission Error ◽  
Gear Transmission ◽  
Tooth Surface ◽  
Contact Ratio ◽  
The Impact

Backlash is a key internal excitation on the dynamic response of planetary gear transmission. After the gear transmission running for a long time under load torque, due to tooth wear accumulation, the backlash between the tooth surface of two mating gears increases, which results in a larger and irregular backlash. However, the increasing backlash generated by tooth accumulated wear is generally neglected in lots of dynamics analysis for epicyclic gear trains. In order to investigate the impact of backlash generated by tooth accumulated wear on dynamic behavior of compound planetary gear set, in this work, first a static tooth surface wear prediction model is incorporated with a dynamic iteration methodology to get the increasing backlash generated by tooth accumulated wear for one pair of mating teeth under the condition that contact ratio equals to one. Then in order to introduce the tooth accumulated wear into dynamic model of compound planetary gear set, the backlash excitation generated by tooth accumulated wear for each meshing pair in compound planetary gear set is given under the condition that contact ratio equals to one and does not equal to one. Last, in order to investigate the impact of the increasing backlash generated by tooth accumulated wear on dynamic response of compound planetary gear set, a nonlinear lumped-parameter dynamic model of compound planetary gear set is employed to describe the dynamic relationships of gear transmission under the internal excitations generated by worn profile, meshing stiffness, transmission error, and backlash. The results indicate that the introduction of the increasing backlash generated by tooth accumulated wear makes a significant influence on the bifurcation and chaotic characteristics, dynamic response in time domain, and load sharing behavior of compound planetary gear set.

THE ROLE OF THE MOTHER IN 131I METABOLISM OF SUCKING AND WEANLING RATS

1965 ◽  
Vol 43 (3) ◽  
pp. 431-436 ◽  
Author(s):  
M. Samel ◽  
A. Caputa
Keyword(s):  
Urinary Bladder ◽  
In Utero ◽  
The State ◽  
Newborn Rats ◽  
Weanling Rats ◽  
Immature Rats ◽  
Other Substances ◽  
Old Rats

In newborn rats the mother provokes the emptying of the urinary bladder by stimulating the perineum with her tongue. The possibility that mothers may thereby ingest the urine of their young has been studied by means of 131I on nine litters of rats aged 10 to 29 days. The results indicate that a considerable quantity of 131I administered intraperitoneally to 10- and 18-day-old rats, which were then reunited with their mothers for 4 hours, reappears in the organism of uninjected nurslings after passing through the organism of the mother. The amount of 131I transferred from injected rats into the bodies of isolated uninjected rats of the same litter decreased during the period of weaning. The observed recirculation of 131I between immature rats and their mothers in both directions may represent a saving mechanism which might include several other substances and would compensate for their loss via the milk, and suggests a new aspect of maternal–neonatal interrelationship which appears as a continuation of the state existing in utero.

Role of montmorillonite in flame retardancy of ethylene–vinyl acetate copolymer

2006 ◽  
Vol 91 (3) ◽  
pp. 593-599 ◽  
Author(s):  
Andrea Szép ◽  
András Szabó ◽  
Nikoletta Tóth ◽  
Péter Anna ◽  
György Marosi
Keyword(s):  
Vinyl Acetate ◽  
Flame Retardancy ◽  
Ethylene Vinyl Acetate ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

scholarly journals Gastroesophageal reflux disease: new approaches to optimizing pharmacotherapy

2021 ◽  
pp. 30-37
Author(s):  
D. N. Andreev ◽  
A. V. Zaborovsky ◽  
E. G. Lobanova
Keyword(s):  
Gastroesophageal Reflux Disease ◽  
Gastroesophageal Reflux ◽  
Reflux Disease ◽  
Barrier Properties ◽  
Nerve Fibers ◽  
Esophageal Mucosa ◽  
Mucosal Permeability ◽  
Other Substances ◽  
Maintenance Of Remission

Proton pump inhibitors (PPIs) are baseline drugs for induction and maintenance of remission in gastroesophageal reflux disease (GERD). PPIs have proven to be highly effective in healing esophageal mucosal lesions and relieving the symptoms of the disease in most cases. However, according to the literature data, the incidence rate of clinical ineffectiveness of PPIs in the form of partial or complete persistence of current symptoms during administration of standard doses of PPIs ranges from 10 to 40%. Optimization of GERD therapy in PPI refractory patients is a significant challenge. In most cases, experts advise to increase a dose / dosage frequency of PPIs, switch to CYP2C19-independent PPIs (rabeprazole, esomeprazole, dexlansoprazole), add an esophagoprotective or promotility agents to therapy. At the same time, these recommendations have a limited effect in some patients, which opens up opportunities for looking for new solutions related to the optimization of GERD therapy. Today there is growing evidence of the relevance of the role of disruption of the cytoprotective and barrier properties of the esophageal mucosa in the genesis of GERD and the formation of refractoriness. Intercellular contacts ensure the integrity of the barrier function of the esophageal mucosa to protect it from various exogenous intraluminal substances with detergent properties. Acid-peptic attack in patients with GERD leads to alteration of the expression of some tight junction proteins in epithelial cells of the esophageal mucosa. The latter leads to increased mucosal permeability, which facilitates the penetration of hydrogen ions and other substances into the submucosal layer, where they stimulate the terminals of nerve fibers playing a role in the induction and persistence of the symptoms of the disease. The above evidence brought up to date the effectiveness study of the cytoprotective drugs with tropism to the gastrointestinal tract, as part of the combination therapy of GERD.

The Role of Toothbrushing in the Prevention and Treatment of Periodontal Disease: Personal Experience of Both Clinical and Experimental Observation for More than Thirty Years

1988 ◽  
Vol 2 (2) ◽  
pp. 204-208 ◽  
Author(s):  
J. Ishikawa
Keyword(s):  
Periodontal Disease ◽  
Personal Experience ◽  
Experimental Studies ◽  
Food Habit ◽  
Tooth Surface ◽  
Treatment And Prevention ◽  
Oral Environment ◽  
Systemic Factors ◽  
Bacterial Plaque

There have been dramatic developments in the theory and therapy of periodontal disease in the last few decades. This paper focuses on the role of toothbrushing in the treatment and prevention of periodontal disease, based on the author's personal experience gained from both clinical and experimental observations for more than 30 years. Even in the recent past, periodontal disease was considered to be untreatable because of various misconceptions regarding its etiology. Attention was concentrated mainly on systemic factors. As a result, periodontallyinvolved teeth were extracted mostly due to lack of technical know-how. The author devoted his primary investigative efforts to systemic factors and found that those were only minimally significant. Later, after using wild and captive monkeys to make extensive experimental studies on local factors, he was convinced that food habit (hard, fibrous, or soft) contributes directly to the etiology of periodontal disease which is restricted in the oral environment itself. Today it is well-established that accumulation of bacterial plaque on the tooth surface is the most important single factor responsible for periodontal disease, and systemic influence can merely modify the condition. Therefore, the accumulated plaque should be mechanically removed by toothbrushing. The essence of mechanical toothbrushing is not only to remove the plaque but also to compensate for the mechanical stimulation of the gingiva (gingival massage), which is lacking with modern soft food. This lecture reviews the effect of methodical toothbrushing obtained from both clinical and experimental studies in animals.

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