Assessment of the impact of toothache, untreated caries and its consequences on the quality of life among poor Brazilian children / Avaliação do impacto da dor de dente, da cárie não tratada e suas consequências na qualidade de vida de crianças brasileiras

Purpose: to evaluate the impact of dental pain and the consequences of untreated dental caries on the quality of life in children of low social-economic status aged from 8 to 10 years old. Materials and Methods: in this cross-sectional study, 230 children were submitted to a clinical examination in which the caries-pufa ratio was measured, afterward, they answered to two questionnaires: one about their quality of life (CPQ8-10) and the other about dental pain. Data were statistically analyzed through Chi-square, Mann-Whitney or Kruskal-Wallis tests to evaluate the association between the variables with impact on children's OHRQoL. To establish the existence of risk factors among variables and impact on OHRQoL a Poisson Regression model was applied. Results: dental caries (p = 0.003; PR 2.39; 95% CI 1.04­1.56), severity of untreated caries (p = 0.008; PR 2.86; 95% CI 1.13­2.00), toothache (p < 0.001; PR 2.31; 95% CI 1.64­3.27) and PUFA + pufa index (p < 0.023; PR 2.68; 95% CI 1.10­1.87) were associated with and were a predictor factor for impact on overall OHRQoL. All of these variables also had an effect over the social welfare subscale (p ≤ 0.001), whereas caries presence was also statistically linked with the emotional wellbeing subscale (p = 0.008) and dental pain with all four subscales (p ≤ 0.001). Conclusion: untreated dental caries' clinical consequences and dental pain exerted a negative influence on the quality of life of schoolchildren analyzed.(AU)

Objetivo: avaliar o impacto da dor de dente e das consequências da cárie não tratada na qualidade de vida de crianças entre 8 e 10 anos com baixos indicadores socioeconômicos. Métodos: neste estudo transversal, 230 crianças escolares foram submetidas a um exame clínico, no qual foram avaliados seus CPO/ceo (Dentes cariados, perdidos e obturados) e PUFA/pufa (Envolvimento pulpar, ulceração, fístula e abscesso). Em um segundo momento, elas responderam a dois questionários: um sobre a qualidade de vida (CPQ8-10) e outro sobre odontalgia. Os dados foram analisados estatisticamente por meio dos testes de Chi-quadrado, Mann-Whitney ou Kruskal-Wallis, para avaliar a associação entre as variáveis e o impacto na qualidade de vida relacionada à saúde oral (QdVRSO) da criança. Para estabelecer a existência de fatores de risco para impacto na QdVRSO entre as variáveis, um modelo de regressão de Poisson foi aplicado. Resultados: a presença de cárie (p = 0,003; RP 2,39; 95% IC 1,04-1,56), a severidade da cárie não tratada (p = 0,008; RP 2,86; 95% IC 1,13-2,00), dor de dente (p < 0,001; RP 2,31; 95% IC 1,64-3,27) e PUFA/pufa (p < 0,023; RP 2,68; 95% IC 1,10- 1,87) foram associados com impacto na QdVRSO, assim como também foram fatores preditores para o impacto na qualidade de vida relacionada à saúde oral. Todas as então citadas variáveis também exerceram efeito sobre a subescala do bem-estar social (p ≤ 0,001), enquanto a presença de cárie esteve estatisticamente conectada com a subescala do bem-estar emocional (p = 0,008) e a dor dentária com todas as subescalas da QdVRSO (p ≤ 0,001). Conclusão: as consequências clínicas da cárie não tratada e a dor dentária exercem uma influência negativa na qualidade de vida das crianças analisadas.(AU)

Pivotal Role of Tenascin-W (-N) in Postnatal Incisor Growth and Periodontal Ligament Remodeling.

The continuously growing mouse incisor provides a fascinating model for studying stem cell regulation and organ renewal. In the incisor, epithelial and mesenchymal stem cells assure lifelong tooth growth. The epithelial stem cells reside in a niche known as the cervical loop. Mesenchymal stem cells are located in the nearby apical neurovascular bundle and in the neural plexus. So far, little is known about extracellular cues that are controlling incisor stem cell renewal and guidance. The extracellular matrix protein tenascin-W, also known as tenascin-N (TNN), is expressed in the mesenchyme of the pulp and of the periodontal ligament of the incisor, and is closely associated with collagen 3 fibers. Here, we report for the first time the phenotype of tenascin-W/TNN deficient mice, which in a C57BL/6N background exhibit a reduced body weight and lifespan. We found major defects in the alveolar bone and periodontal ligament of the growing rodent incisors, whereas molars were not affected. The alveolar bone around the incisor was replaced by a dense scar-like connective tissue, enriched with newly formed nerve fibers likely leading to periodontal pain, less food intake and reduced body weight. Using soft food to reduce mechanical load on the incisor partially rescued the phenotype. In situ hybridization and Gli1 reporter mouse experiments revealed decreased hedgehog signaling in the incisor mesenchymal stem cell compartment, which coordinates the development of mesenchymal stem cell niche. These results indicate that TNN deficiency in mice affects periodontal remodeling and increases nerve fiber branching. Through periodontal pain the food intake is reduced and the incisor renewal and the neurovascular sonic hedgehog secretion rate are reduced. In conclusion, tenascin-W/TNN seems to have a primary function in rapid periodontal tissue remodeling and a secondary function in mechanosensation.

Descripción de las propiedades funcionales del sistema nociceptivo trigeminal en relación con el dolor pulpar / Description of the functional properties of the nociceptive trigeminal system in relation to pulpal pain

El sistema trigeminal nociceptivo es un componente del sistema sensorial somestésico que tiene la capacidad de discriminar cuatro variables básicas de los estímulos que provocan daño tisular, ellas son: cualidad, curso temporal, localización e intensidad. Las fibras A delta y C, vinculadas a la nocicepción están presentes en la pulpa dental. Se utilizan varias clasificaciones del dolor, atendiendo a diversos criterios: calidad de la sensación, velocidad de transmisión por las fibras, en relación con el lugar del cuerpo donde se exprese, y a la ubicación del nociceptor. La evolución de las condiciones pulpares se clasifican como: pulpitis reversible, pulpitis transicional, pulpitis irreversible y pulpa necrótica.Según su cualidad, el dolor pulpar puede ser punzante o continuo; atendiendo a su aparición, provocado o espontáneo; por su curso, intermitente o continuo; por su localización puede ser limitado a una región, irradiado y referido; y en relación con su intensidad se considera leve, moderado o severo. La capacidad del sistema sensorial nociceptivo en cuanto a discriminar la modalidad, curso temporal, localización e intensidad del estímulo, permite conocer las diferentes etapas de un proceso inflamatorio pulpar(AU)

The nociceptive trigeminal system is a component of the somatosensory system capable of distinguishing four basic variables of stimuli causing tissue damage: quality, time course, location and intensity. A-delta and C fibers, which are related to nociception, are present in dental pulp. Several classifications of pain are used, based on various criteria: quality of the sensation, transmission velocity along fibers, body part where it is expressed, and location of the nociceptor. According to their evolution, pulpal conditions are classified into reversible pulpitis, transitional pulpitis, irreversible pulpitis and necrotic pulp. Pulpal pain has been classified according to the following variables: quality: sharp or continuous; cause: provoked or spontaneous; course: intermittent or continuous; location: limited to a region, radiating or referred; and intensity: mild, moderate or severe. The capacity of the nociceptive sensory system to distinguish the mode, time course, location and intensity of the stimulus makes it possible to recognize the different stages of a pulpal inflammatory process(AU)

Quantitative methods for somatosensory evaluation in atypical odontalgia

A systematic review was conducted to identify reliable somatosensory evaluation methods for atypical odontalgia (AO) patients. The computerized search included the main databases (MEDLINE, EMBASE, and Cochrane Library). The studies included used the following quantitative sensory testing (QST) methods: mechanical detection threshold (MDT), mechanical pain threshold (MPT) (pinprick), pressure pain threshold (PPT), dynamic mechanical allodynia with a cotton swab (DMA1) or a brush (DMA2), warm detection threshold (WDT), cold detection threshold (CDT), heat pain threshold (HPT), cold pain detection (CPT), and/or wind-up ratio (WUR). The publications meeting the inclusion criteria revealed that only mechanical allodynia tests (DMA1, DMA2, and WUR) were significantly higher and pain threshold tests to heat stimulation (HPT) were significantly lower in the affected side, compared with the contralateral side, in AO patients; however, for MDT, MPT, PPT, CDT, and WDT, the results were not significant. These data support the presence of central sensitization features, such as allodynia and temporal summation. In contrast, considerable inconsistencies between studies were found when AO patients were compared with healthy subjects. In clinical settings, the most reliable evaluation method for AO in patients with persistent idiopathic facial pain would be intraindividual assessments using HPT or mechanical allodynia tests.

Fatigue mediates the relationship between pain interference and distress in patients with persistent orofacial pain.

AIMS: To test the role of fatigue and its subtypes (general, physical, emotional, mental, and vigor) in mediating the relationship between psychological distress and pain interference. METHODS: Retrospective, de-identified records were examined for 431 patients seeking treatment for persistent orofacial pain. Primary diagnoses of participants were muscle pain (29.8%), joint pain (26.0%), neuropathic pain (19.5%), and other (ie, fibromyalgia, centrally mediated myalgia, tendonitis, dental pain, cervical spine displacement, and no diagnosis; 24.7%). Mediation models were tested with distress as the independent variable, interference as the dependent variable, and fatigue or its subtypes as the mediators. RESULTS: After controlling for pain duration and average levels of pain, total fatigue mediated the relationship between distress and interference. Fatigue subtypes partially mediated the relationship between distress and interference, but mediation was strongest with the composite fatigue variable. The results, however, should be interpreted cautiously, as data were collected at a single time point and do not imply causality. CONCLUSION: These results suggest that interventions targeted specifically at fatigue symptoms may be helpful for reducing interference and improving quality of life in patients with persistent orofacial pain.

Atypical odontalgia: an up-to-date view.

Atypical odontalgia (AO) is a little known chronic pain condition. It usually presents as pain in a site where a tooth was endodontically treated or extracted, in the absence of clinical or radiographic evidence of tooth pathology. It is a rare clinical challenge for most clinicians, which leads to the patients being referred to several specialists and sometimes undergoing unnecessary surgical procedures. The pain mechanisms involved in AO are far from clear, and numerous potential mechanisms have been suggested. Currently, the most accredited hypothesis is that AO is a neuropathic pain condition caused by deafferentation. The differential diagnosis of AO remains difficult, because it shares symptoms with many others pathologies affecting this area. Patients have difficulties accepting the AO diagnosis and treatment. As a result, they frequently change physicians, and may potentially also receive several invasive treatments, usually resulting in an aggravation of the pain. Although some patients do get complete pain relief following treatment, for most patients the goal should be to achieve adequate pain management. Currently, most management is based on expert opinion and case reports. More research and high quality randomized controlled trials are needed in order to develop evidence-based treatments, currently based on expert opinion or carried over from other neuropathic pain conditions in the orofacial region.

Barodontalgia em voo e diagnóstico diferencial de dor odontogênica / In flight barodontalgia and differential diagnosis of odontogenic pain

Os pilotos são responsáveis pelas vidas da tripulação e passageiros, pela conclusão do voo em segurança. Por este motivo, a saúde e bem estar destes profissionais é de extrema importância. Uma condição que pode aparecer em vôo é a Barodontalgia, que é uma dor aguda causada pela diferença de pressão atmosférica no dente. Tal ocorrência pode levar a vertigem, incapacitação do profissional, e finalização prematura do vôo. Objetivo do trabalho foi realizar uma revisão de literatura sobre barodontalgia evidenciando a etiologia, condições de aparecimento, bem como conduta para o manejo dos aeronavegantes. A literatura considera que as causas descritas são: cárie profunda, restauração desadaptada, tratamento endodôntico incompleto, abscesso periodontal/periapical, e extrações recentes. Doenças congestivas dos seios paranasais, sobretudo do seio maxilar, podem se assemelhar a barodontalgia. As tripulações de aeronaves civis e militares têm maior potencial para experimentar tal ocorrência, por conta disso, sua saúde bucal deve ser periodicamente avaliada, e ainda os cirurgiões-dentistas devem estar conscientes da possibilidade da ocorrência deste fenômeno durante a jornada de trabalho destes profissionais, bem como estar preparados para o uso de medidas preventivas e curativas, a fim de reduzir sua incidência e gravidade, melhorando as condições de trabalho desta população

Pilots are responsible for the lives of the crew and passengers, and for completing the flight safely. For this reason, health and welfare of these professionals is extremely important. A condition that may appear in flight is Barodontalgia, which is a sharp pain caused by the difference in air pressure in the tooth. Such an occurrence can lead to dizziness, professional disability, and premature termination of the flight. The purpose of the study was a literature review on the etiology of barodontalgia, conditions of appearance, and the management of air crew. The literature describes as causes: deep decay, defectives restoration, incomplete root canal therapy, periodontal abscess/ periapical, and recent extractions. Congestive diseases of the paranasal sinuses, especially of the maxillary sinus may resemble barodontalgia. The crews of civil and military aircraft have greater potential to experience such an occurrence, because of that, their dental health should be periodically evaluated, and even the dentists should be aware of the possibility of this phenomenon during the working hours of these professionals, and be prepared for the use of preventive and curative measures, in order to reduce its incidence and severity, improving working conditions in this population

Fluid mechanics in dentinal microtubules provides mechanistic insights into the difference between hot and cold dental pain.

Dental thermal pain is a significant health problem in daily life and dentistry. There is a long-standing question regarding the phenomenon that cold stimulation evokes sharper and more shooting pain sensations than hot stimulation. This phenomenon, however, outlives the well-known hydrodynamic theory used to explain dental thermal pain mechanism. Here, we present a mathematical model based on the hypothesis that hot or cold stimulation-induced different directions of dentinal fluid flow and the corresponding odontoblast movements in dentinal microtubules contribute to different dental pain responses. We coupled a computational fluid dynamics model, describing the fluid mechanics in dentinal microtubules, with a modified Hodgkin-Huxley model, describing the discharge behavior of intradental neuron. The simulated results agreed well with existing experimental measurements. We thence demonstrated theoretically that intradental mechano-sensitive nociceptors are not "equally sensitive" to inward (into the pulp) and outward (away from the pulp) fluid flows, providing mechanistic insights into the difference between hot and cold dental pain. The model developed here could enable better diagnosis in endodontics which requires an understanding of pulpal histology, neurology and physiology, as well as their dynamic response to the thermal stimulation used in dental practices.

Prolonged gingival cold allodynia: a novel finding in patients with atypical odontalgia.

OBJECTIVE: The aim of this study was to examine atypical odontalgia (AO) patients with extraoral quantitative sensory testing (EQST) and an intraoral mucosal cold test. STUDY DESIGN: Twenty-one subjects with AO and 18 control subjects underwent EQST for electrical and thermal pain and detection thresholds. Cold was applied to painful mucosal areas in AO patients and randomly in control subjects. RESULTS: Electrical pain thresholds were higher in AO patients than in control subjects in the same dermatome affected by the pain (P = .03), but no significant differences were observed in electrical detection thresholds and heat pain and detection thresholds at other sites. Cold application was painful in control and AO subjects, but duration of pain sensation was significantly longer in AO patients (P = .019 in contralateral side; P = .029 in affected side). CONCLUSIONS: The finding of extended painful aftersensation following cold application in AO patients supports the involvement of central mechanisms. The cold test is clinically easy to apply and of clinically significant value.

Toothache referred from heart disease and lung cancer via the vagus nerve.

New epidemiologic evidence suggests that referred craniofacial pain in coronary heart disease is more common than previously believed. Current medical reports suggest that in addition to coronary disease, thoracic disorders such as aortic dissection, pericarditis, and lung cancer can cause referred craniofacial pain. Recent physiologic evidence from animals and humans suggests that the vagus nerve mediates this referral of cardiac pain to the maxillofacial region. This article discusses the critical role of the dentist in patient education and recognition of referred head and neck pain in thoracic disease, in relation to the need for prompt medical treatment for these life-threatening conditions.

Theophylline attenuates hippocampal blood flow responses induced by tooth pulp stimulation in rats.

In this study, we performed tests to determine whether tooth pulp stimulation (TPS) increases hippocampal blood flow (HBF), and if so, to investigate whether the increase in HBF is mediated via the activation of adenosine receptors. We measured HBF in urethane-anesthetized rats using laser Doppler flowmetry (LDF) and examined the effect of theophylline, a nonselective adenosine receptor antagonist, on TPS-induced HBF responses. TPS increased HBF, and its response was significantly attenuated by the intraperitoneal administration of theophylline (20 mg/kg). These results suggest that the HBF response induced by TPS may be, at least in part, produced through adenosine receptors.

Behavioural responses and expression of P2X3 receptor in trigeminal ganglion after experimental tooth movement in rats.

OBJECTIVE: To explore the role of P2X(3) receptor in pain induced by experimental tooth movement. DESIGN: Male Sprague-Dawley rats weighing 200-300g were used. P2X(3) receptor distribution in the caudal one-third portion of the trigeminal ganglion (TG) was studied by IHC. Next, the changes of P2X(3) expression were detected by Western blotting 4h, 1d, 2d, 3d, 5d, 7d, 14d after tooth movement. We then developed a behaviour pain model associated with directed mouth wiping. Finally, the effect of TNP-ATP on nociceptive-like behaviour was evaluated. RESULTS: Our results showed that P2X(3) receptors were expressed mainly in small- and medium-sized cells and experimental tooth movement led to an increase in staining of mandibular P2X(3) receptors. In addition, following experimental tooth movement, the expression of P2X(3) receptor in TG was statistically significantly up-regulated from days 1 to 5, with a peak on day 3. It was also found that the time spent on directed mouth wiping was dramatically increased by experimental tooth movement from days 1 to 7. The rhythm change of P2X(3) receptor expression in TG and the mouth wiping behaviour were in concert with the initial orthodontic pain responses. The directed mouth wiping behaviour was modulated in a force-dependent manner and could be attenuated by peripheral and systemic morphine. Furthermore, peripherally administered TNP-ATP could exert an analgesic effect on this pain model. CONCLUSION: These results suggest that directed mouth wiping behaviour can be a reliable measurement of pain following experimental tooth movement in rats. The P2X(3) receptor is important in the development and maintenance of tooth movement pain and thus may be peripheral targets for analgesics in orthodontic pain control.

Involvement of NOS/NO in the development of chronic dental inflammatory pain in rats.

Nitric oxide (NO) is believed to be an important messenger molecule in nociceptive transmission. To assess the possible roles of NO in trigeminal sensory system, we examined the distribution and density of histochemical staining for nicotinamide adenine dinucleotide phosphate diaphorase (NADPH-d), a marker for nitric oxide synthase (NOS), and immunohistochemical staining for c-Fos, a neuronal activity marker, in the trigeminal ganglion (TG) and trigeminal nucleus caudalis (Vc) following pulp exposure (PX) injured rats. The neurons innervating injured tooth in TG were labeled by the retrograde transport of fluoro-gold (FG). Teeth were processed for H&E staining. We found that NADPH-d activity increased significantly in the TG and Vc following PX pretreatment (7-28 days, especially in 21-28 days). Such changes were closely corresponding to the pattern of c-Fos detected by immunocytochemistry. The results demonstrate that PX-induced chronic pulpal inflammation results in significant alterations in the TG cells and in the Vc, and such changes may underlie the observed NADPH-d activity. It suggests that NOS/NO may play an active role in both peripheral and central processing of nociceptive information following chronic tooth inflammation.

Neuropeptides in dental pulp: the silent protagonists.

Dental pulp is a soft mesenchymal tissue densely innervated by afferent (sensory) fibers, sympathetic fibers, and parasympathetic fibers. This complexity in pulp innervation has motivated numerous investigations regarding how these 3 major neuronal systems regulate pulp physiology and pathology. Most of this research is focused on neuropeptides and their role in regulating pulpal blood flow and the development of neurogenic inflammation. These neuropeptides include substance P, calcitonin gene-related peptide, neurokinin A, neuropeptide Y, and vasoactive intestinal polypeptide among others. The purpose of this article is to review recent advances in neuropeptide research on dental pulp, including their role in pulp physiology, their release in response to common dental procedures, and their plasticity in response to extensive pulp and dentin injuries. Special attention will be given to neuropeptide interactions with pulp and immune cells via receptors, including studies regarding receptor identification, characterization, mechanisms of action, and their effects in the development of neurogenic inflammation leading to pulp necrosis. Their role in the growth and expansion of periapical lesions will also be discussed. Because centrally released neuropeptides are involved in the development of dental pain, the pain mechanisms of the pulpodentin complex and the effectiveness of present and future pharmacologic therapies for the control of dental pain will be reviewed, including receptor antagonists currently under research. Finally, potential clinical therapies will be proposed, particularly aimed to manipulate neuropeptide expression or blocking their receptors, to modulate a variety of biologic mechanisms, which preliminary results have shown optimistic results.

Neurovascular pains: implications of migraine for the oral and maxillofacial surgeon.

Epidemiologic studies have shown that migraine headaches are a common finding in the general population, often associated with a high degree of disability. Additionally, migraine has a reported comorbidity with other medical conditions, most notably with chronic pains, such as temporomandibular disorders. The pathophysiologic mechanisms involved with migraine are suggestive of an increased and prolonged hyperexcitability to stimuli, especially within the trigeminal distribution. Because migraine is mediated by branches of the trigeminal nerve it has the potential to mimic other types of pains, such as toothache or sinusitis. It is therefore recommended that oral and maxillofacial surgeons be familiar with the diagnostic criteria for migraine headaches to identify and appropriately treat such individuals who present to their clinics.

Atypical odontalgia - pathophysiology and clinical management.

Atypical odontalgia (AO) is a chronic form of dental pain without signs of pathology. Several hypotheses have been put forward regarding the pathophysiology. AO has been proposed to be psychogenic, vascular, neuropathic or idiopathic. The scientific evidence supporting or rejecting these hypotheses are reviewed in this paper. At this time, the best supported hypothesis is that AO is a neuropathic pain condition. Relevant differential diagnoses, such as odontogenic pain, sinusitis, trigeminal neuralgia among others, are presented and the evidence regarding possible management strategies is reviewed. A treatment algorithm for AO is proposed based on the rather scarce scientific evidence available and inspired by a similar treatment algorithm for peripheral neuropathic pain. The proposed strategy involves an interdisciplinary approach including patient education, psychological counselling, topical and systemic medication and, importantly, avoidance of invasive treatments like surgery and endodontics. Two illustrative cases are presented.

[Primary and secondary stomatodynia: a difficult diagnosis]. / Stomatodynies primaire et secondaire : un diagnostic difficile.

Primary stomatodynia involves mainly women after menopause presenting somatization, depression and anxiety at values higher than control subjects. This chronic pain is often an intense burning pain beginning in the tongue the entire oral cavity, increasing in intensity through the day with a high level of emotional after effects. These patients often describe two associated symptoms: mouth dryness sensation and altered taste. The causes remain uncertain. The participation of female sexual hormones and neuropathic factors has been suggested possibly through a sensory neuropathy of small fibers of the oral mucosa. Normal clinical examinations and non clinical tests differentiate primary from secondary stomatodynia. The management consists in using low doses of topical clonazepam without swallowing or systemic clonazepam. The association of this drug with tricyclic antidepressants has given variable results. A cognitive behavioural management has been successfully attempted.

Assessing oral health-related quality of life in general dental practice in Scotland: validation of the OHIP-14.

OBJECTIVES: To validate the Oral Health Impact Profile (OHIP)-14 in a sample of patients attending general dental practice. METHODS: Patients with pathology-free impacted wisdom teeth were recruited from six general dental practices in Tayside, Scotland, and followed for a year to assess the development of problems related to impaction. The OHIP-14 was completed at baseline and at 1-year follow-up, and analysed using three different scoring methods: a summary score, a weighted and standardized score and the total number of problems reported. Instrument reliability was measured by assessing internal consistency and test-retest reliability. Construct validity was assessed using a number of variables. Linear regression was then used to model the relationship between OHIP-14 and all significantly correlated variables. Responsiveness was measured using the standardized response mean (SRM). Adjusted R(2)s and SRMs were calculated for each of the three scoring methods. Estimates for the differences between adjusted R(2)s and the differences between SRMs were obtained with 95% confidence intervals. RESULTS: A total of 278 and 169 patients completed the questionnaire at baseline and follow-up, respectively. Reliability - Cronbach's alpha coefficients ranged from 0.30 to 0.75. Alpha coefficients for all 14 items were 0.88 and 0.87 for baseline and follow-up, respectively. Test-retest coefficients ranged from 0.72 to 0.78. Validity - OHIP-14 scores were significantly correlated with number of teeth, education, main activity, the use of mouthwash, frequency of seeing a dentist, the reason for the last dental appointment, smoking, alcohol intake, pain and symptoms. Adjusted R(2)s ranged from 0.123 to 0.202 and there were no statistically significant differences between those for the three different scoring methods. Responsiveness - The SRMs ranged from 0.37 to 0.56 and there was a statistically significant difference between the summary scores method and the total number of problems method for symptomatic patients. CONCLUSIONS: The OHIP-14 is a valid and reliable measure of oral health-related quality of life in general dental practice and is responsive to third molar clinical change. The summary score method demonstrated performance as good as, or better than, the other methods studied.

Mechanisms associated with unusual orofacial pain.

This article presents an overview of possible mechanisms associated with pain perception, with a specific focus on understanding unusual manifestations of orofacial pain associated with nerve insult. It includes recent evidence concerning neurobiological changes that occur in the periphery at tissue and nerve sites, or within the central nervous system, and that may involve chemical and inflammatory responses, sensitization, or alterations of cellular function. Moreover, the contribution of the autonomic nervous system, changes in emotional reactivity and vigilance, the roles of high brain centers such as the basal ganglia (nigro-striatal) system, and the influence of aging and gender, are briefly described.