Incidence, and factors associated with moderate/severe pediatric traumatic brain injury in children aged 5-15 years in western, Mexico.

OBJECTIVE: The study objectives were to estimate the standardized incidence and evaluate factors associated with moderate/severe pediatric traumatic brain injury (p-TBI) in children aged 5-15 years in Western, Mexico. METHODS: The study was cross-sectional in design. We estimated the standardized incidence of moderate/severe p-TBI using the direct methods of the World Health Organization (WHO) standard populations. We utilized the Glasgow Coma Scale (GCS) to identify moderate/severe p-TBI patients (GCS ≤ 13). Logistic regression analysis was applied to evaluate variables associated with moderate/severe p-TBI. RESULTS: The standardized incidence of patients diagnosed with moderate/severe p-TBI was 31.0/100,000 person-years (95 % CI 28.7-33.4). According to age, the moderate/severe TBI group was included. A total of 254 (38.5 %) patients were aged 5-9 years, 343 (52.0 %) were aged 10-14 years, and 62 (9.5 %) were aged 15 years. Factors associated with moderate/severe TBI in the crude analysis were male sex (OR 5.50, 95 % CI 4.16-7.39, p < 0.001), primary school (OR 2.15, 95 % CI 1.62-2.84, p < 0.001), and falls (OR 1.34, 95 % CI 1.02-1.77, p = 0.035). Factors associated with moderate/severe p-TBI in the adjusted analysis were male sex (OR 6.12, 95 % CI 4.53-8.29, p < 0.001), primary school (OR 3.25, 95 % CI 2.31-4.55, p < 0.001), and falls (OR 1.78, 95 % CI 1.28-2.47, p < 0.001). CONCLUSION: The incidence of moderate/severe p-TBI in children aged 5-15 years in western Mexico in this study was higher than that in other studies. One of the biggest factors associated with moderate/severe p-TBI was male sex, specifically those with lower education levels and those who were prone to falls.

Rationale and design of a pilot randomized controlled trial to increase moderate-to-vigorous physical activity in preadolescent Latina girls and their mothers.

Background: Hispanic/Latina girls have a low prevalence of moderate-intensity physical activity (PA) compared to their male counterparts and non-Hispanic White girls. Mothers influence their children's activity levels by creating and supporting PA opportunities, modeling PA, and reinforcing children's efforts to be physically active. The Conmigo trial will evaluate a mother-daughter intervention to promote PA and examine potential mechanisms of change including mothers' PA, parenting regarding PA, and mother-daughter communication. Method: This randomized controlled trial examines the feasibility, acceptability, and impact of a 12-week intervention promoting PA in preadolescent Latina girls in San Diego County, CA. Participants (n = 90 dyads) are randomized to the Conmigo PA intervention or to a control group that receive an abbreviated version of the intervention. The intervention was informed by Social Cognitive Theory and Family Systems Theory and emphasize family-level factors to promote PA using an actor-partner model. Mothers and daughters attend weekly 90-min sessions in English or in Spanish via Zoom video conferencing, supported by facilitator follow-ups and WhatsApp supportive chat group for mothers. Objective (accelerometer) and self-report measures at baseline, 3 months, and 6 months capture the frequency and intensity of PA and correlates and predictors of PA. We also examine the impact of the intervention on the bidirectional influence of mother-daughter PA. Implications: The findings from the Conmigo trial will form the basis of a randomized controlled community trial and will move the field forward in identifying targets of change in preventing chronic disease risk in Hispanic/Latino communities.

Antibacterial Properties In Vitro of Magnesium Oxide Nanoparticles for Dental Applications.

(1) Dental caries, periodontitis, or peri-implantitis are commensal infections related to oral biofilm former bacteria. Likewise, magnesium oxide nanoparticles (MgO-NPs) were studied to introduce them to the antibacterial properties of a few microorganisms. Considering this, the purpose of the present investigation was to determine the antibacterial properties of MgO-NPs on representative oral strains. (2) Methods: MgO-NPs with a cubic crystal structure were obtained by magnesium hydroxide mechanical activation. After synthesis, the MgO-NPs product was annealed at 800 °C (2 h). The MgO-NPs obtained were tested against ten oral ATCC strains at ten serial concentrations (1:1 20.0-0.039 mg/mL per triplicate) using the micro-broth dilution method to determine the minimal inhibitory concentration (MIC) or minimal bactericidal concentration (MIB). Measures of OD595 were compared against each positive control with a Student's t-test. Viability was corroborated by colony-forming units. (3) Results: The polycrystalline structure had an average size of 21 nm as determined by X-ray diffraction and transmission electron microscopy (high resolution). Antimicrobial sensitivity was observed in Capnocytophaga gingivalis (MIB/MIC 10-5 mg/mL), Eikenella corrodens (MIB 10 mg/mL), and Streptococcus sanguinis (MIB 20 mg/mL) at high concentrations of the MgO-NPs and at lower concentrations of the MgO-NPs in Actinomyces israelii (MIB 0.039 mg/mL), Fusobacterium nucleatum subsp. nucleatum (MIB/MIC 5-2.5 mg/mL), Porphyromonas gingivalis (MIB 20 mg/mL/MIC 2.5 mg/mL), Prevotella intermedia (MIB 0.625 mg/mL), Staphylococcus aureus (MIC 2.5 mg/mL), Streptococcus mutans (MIB 20 mg/mL/MIC 0.321 mg/mL), and Streptococcus sobrinus (MIB/MIC 5-2.5 mg/mL). (4) Conclusions: The MgO-NPs' reported antibacterial properties in all oral biofilm strains were evaluated for potential use in dental applications.

Reversal of SARS-CoV2-Induced Hypoxia by Nebulized Sodium Ibuprofenate in a Compassionate Use Program.

INTRODUCTION: Sodium ibuprofenate in hypertonic saline (NaIHS) administered directly to the lungs by nebulization and inhalation has antibacterial and anti-inflammatory effects, with the potential to deliver these benefits to hypoxic patients. We describe a compassionate use program that offered this therapy to hospitalized COVID-19 patients. METHODS: NaIHS (50 mg ibuprofen, tid) was provided in addition to standard of care (SOC) to hospitalized COVID-19 patients until oxygen saturation levels of > 94% were achieved on ambient air. Patients wore a containment hood to diminish aerosolization. Outcome data from participating patients treated at multiple hospitals in Argentina between April 4 and October 31, 2020, are summarized. Results were compared with a retrospective contemporaneous control (CC) group of hospitalized COVID-19 patients with SOC alone during the same time frame from a subset of participating hospitals from Córdoba and Buenos Aires. RESULTS: The evolution of 383 patients treated with SOC + NaIHS [56 on mechanical ventilation (MV) at baseline] and 195 CC (21 on MV at baseline) are summarized. At baseline, NaIHS-treated patients had basal oxygen saturation of 90.7 ± 0.2% (74.3% were on supplemental oxygen at baseline) and a basal respiratory rate of 22.7 ± 0.3 breath/min. In the CC group, basal oxygen saturation was 92.6 ± 0.4% (52.1% were on oxygen supplementation at baseline) and respiratory rate was 19.3 ± 0.3 breath/min. Despite greater pulmonary compromise at baseline in the NaIHS-treated group, the length of treatment (LOT) was 9.1 ± 0.2 gs with an average length of stay (ALOS) of 11.5 ± 0.3 days, in comparison with an ALOS of 13.3 ± 0.9 days in the CC group. In patients on MV who received NaIHS, the ALOS was lower than in the CC group. In both NaIHS-treated groups, a rapid reversal of deterioration in oxygenation and NEWS2 scores was observed acutely after initiation of NaIHS therapy. No serious adverse events were considered related to ibuprofen therapy. Mortality was lower in both NaIHS groups compared with CC groups. CONCLUSIONS: Treatment of COVID-19 pneumonitis with inhalational nebulized NaIHS was associated with rapid improvement in hypoxia and vital signs, with no serious adverse events attributed to therapy. Nebulized NaIHS s worthy of further study in randomized, placebo-controlled trials (ClinicalTrials.gov: NCT04382768).

Sustained attention in schoolchildren with type-1 diabetes. A quantitative EEG study.

OBJECTIVE: Type-1 diabetes (T1D) is a disruptive metabolic disease that has an impact on neurodevelopment through its effects on the structure and function of the brain. One of the cognitive domains affected by T1D is sustained attention. The aim of this study was to analyze this process in children with T1D and compare their results to those of healthy controls. METHODS: Seventeen T1D children attending regular primary school and a similar group of healthy children matched by gender, age, handedness, and educational level were evaluated while identifying happy faces in a Go-NoGo task presented visually with simultaneous electrophysiological recording. RESULTS: Behavioral performance in the two groups was similar but, the T1D children showed greater prefrontal and frontoparietal spectral power in the theta and alpha bands, compared to controls. Distinct patterns of theta lateralization between groups were also observed, with a negative correlation between frontal power magnitudes in delta and theta and glycated hemoglobin levels. CONCLUSIONS: These results seem to reflect the early deleterious effects of T1D on neurodevelopment, which affects mainly attention allocation processes and the neurofunctional substrates that underlie them. SIGNIFICANCE: This phenomenon emphasizes the need for studies on neural-specific targets in which T1D affects neurodevelopment.

Diagnóstico de pacientes con sospecha de COVID-19: ¿Cuál es el rol de la TC de tórax? / Diagnosis of patients with suspected COVID-19: What is the role of chest CT?

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Structural Equation Modeling of Parkinson's Caregiver Social Support, Resilience, and Mental Health: A Strength-Based Perspective.

Only scant literature has focused on social support in Parkinson's disease (PD) caregivers, and no studies to date have examined resilience in this population, despite both variables having been shown to be important in other caregiving populations. As a result, the purpose of the current study was to construct and validate a theoretical structural equation model whereby social support is associated with higher levels of resilience in PD caregivers and increased resilience is related to decreased mental health symptoms. Two hundred fifty three PD caregivers from two clinics in the United States and Mexico completed self-report measures of these constructs. Results suggested that the hypothesized pattern was robustly supported with the structural equation model showing generally good fit indices. Higher levels of social support were associated with increased resilience, which in turn was associated with reduced mental health symptoms. Resilience partially mediated social support's effect on mitigating mental health symptoms. The model explained 11% of the variance in resilience and 35% in mental health symptoms. These findings have implications for future research on the development and tailoring of interventions to improve social support, resilience, and mental health in PD caregivers.

Health-related quality of life and mental health outcomes in Mexican TBI caregivers.

Research has documented the deleterious effects on caregivers of providing care for an individual with traumatic brain injury (TBI). TBI caregivers in Mexico specifically have reduced health-related quality of life (HRQOL) across both physical and mental health domains. The purpose of the current study was to uncover the system of connections between Mexican TBI caregivers' HRQOL and their mental health. A cross-sectional survey was conducted at a public medical facility in Guadalajara, México. Ninety family caregivers of individuals with TBI completed measures of HRQOL, satisfaction with life, depression, and burden. A canonical correlation analysis revealed that the better the caregivers' HRQOL, the better their mental health was, with the effect reaching a large-sized effect. A distinct pattern emerged linking caregivers' higher energy levels and better social functioning to lower depression and greater satisfaction with life. A series of multiple regressions similarly uncovered that the most robust independent HRQOL predictors of caregiver mental health were vitality and social functioning. Especially for TBI caregivers with poor health, behavioral health interventions in Latin America that target the HRQOL domains of social functioning and vitality may significantly improve caregiver mental health, and as a result, informal care for TBI.

Postconcussion syndrome and mild head injury: the role of early diagnosis using neuropsychological tests and functional magnetic resonance/spectroscopy.

OBJECTIVE: Postconcussion syndrome (PCS) is usually underestimated in cases of mild head injury (MHI). It is one of the most common causes of physical, cognitive, and psychomotor disturbances that affect the quality of life, work, and social reintegration of individuals. Until now, we did not have evidence of structural abnormalities shown by traditional imaging methods. We describe a series of instruments that confirm PCS with satisfactory evidence. METHODS: We conducted a clinical prospective study of 19 adult patients selected from a pool of 320 adults who had MHI. The cognitive, executive, and memory functions of subjects were examined within the first 72 hours using neuropsychological tests. These results were analyzed with neurological examination and functional MR/spectroscopy. RESULTS: Neurobehavioral alterations were found in 47% of cases, with posttraumatic amnesia. Around 55% of subjects experienced physical disturbances such as headache and postural vertigo due to PCS. The spectroscopy reports revealed neurometabolite disturbances in 54% of cases, particularly N-acetylaspartate (Naa) and the Naa/lactate ratio in the frontal lobe. We observed a relationship between metabolite disturbances in spectroscopy and the digit span backward test (P = .045). CONCLUSIONS: This first diagnostic strategy supports with scientific evidence the presence of PCS in MHI. We identified physical and neuropsychological abnormalities from this group, affecting the areas of memory and learning. Evidence of neurometabolite disturbances were found specifically in the frontal lobe. It is necessary to complete comparative follow-up for an extended period of time. The neuropsychological and spectroscopy tests allow us to confirm the diagnosis of a syndrome that is usually neglected.

Family needs and TBI caregiver mental health in Guadalajara, Mexico.

BACKGROUND: Traumatic brain injury (TBI) is a leading cause of death in Mexico, and Mexican TBI caregivers have been shown to experience significant mental health problems and high levels of family needs. OBJECTIVE: This study investigated the associations between family needs and Mexican TBI caregiver mental health. METHODS: Ninety TBI caregivers from Guadalajara, Mexico completed measures assessing their own mental health (depression, anxiety, burden, satisfaction with life, and self-esteem) and family needs (physical health, informational, financial, social support, and household). RESULTS: Family health needs were uniquely associated with all indices of caregiver mental health, and household needs were uniquely associated with caregiver depression, burden, and anxiety. Additionally, social support needs were related to caregiver satisfaction with life, informational needs to burden, and financial needs to self-esteem. CONCLUSIONS: Interventions for TBI caregivers in Mexico-and likely in other global regions with high levels of familism-should include an emphasis on overall family health, the delineation of family roles regarding household responsibilities, the improvement of social support networks and the social presence of family members, and the provision of complete and relevant information regarding TBI. When these needs are more comprehensively met, caregiver mental health will likely improve.

The influence of TBI impairments on family caregiver mental health in Mexico.

PURPOSE: This study examined the influence of five types of impairments in individuals with traumatic brain injury (TBI)-and caregiver stress due to these impairments-on the mental health of family caregivers in Guadalajara, Mexico. METHOD: Ninety caregivers completed measures of TBI impairments and of their own mental health. The majority were female (92.20%) with a mean age of 47.12 years (SD = 12.67). Caregivers dedicated a median of 50 hours weekly to caregiving and had spent a median of 11 months providing care. RESULTS: Two canonical correlation analyses suggested that these two sets of variables were broadly related, such that more severe impairments in individuals with TBI and more caregiver stress due to those impairments were associated with lower caregiver mental health. Across both analyses, social impairments were most associated with increased caregiver burden. Follow-up analyses also uncovered that caregiver stress due to cognitive impairments was uniquely associated with caregiver burden and anxiety. CONCLUSIONS: These results are the first to provide evidence that social and cognitive impairments in individuals with TBI from Latin America are the impairments most associated with caregiver mental health and highlight the need for interventions that target social and cognitive functioning.

Just how bad is it? Comparison of the mental health of Mexican traumatic brain injury caregivers to age-matched healthy controls.

OBJECTIVE: To compare the mental health of family caregivers of individuals with Traumatic brain injury (TBI) to an age-matched healthy control from Guadalajara, Mexico. SETTING: Hospital Civil Fray Antonio Alcade, a public medical facility in Guadalajara, Mexico. PARTICIPANTS: Ninety family caregivers of individuals with TBI and 89 healthy controls (n = 179) did not differ with respect to age, sex, marital status, education, or household income. MAIN OUTCOME MEASURES: Outcome measures assessed satisfaction with life (Satisfaction with Life Scale), depression (Patient Health Questionnaire-9), social support (Interpersonal Support Evaluation List), self-esteem (Rosenberg Self-Esteem Scale), and anxiety (State-Trait Anxiety Inventory). RESULTS: A multivariate analysis of variance found that in comparison to controls, TBI caregivers reported substantially lower mental health scores across all indices, as well as lower social support in two out of three comparisons. The effect sizes of the social support differences were small; two out of five mental health differences reached medium-sized effects; and the other three reached large-sized effects. CONCLUSIONS: Because TBI caregivers' mental health influences the quality of informal care they can provide, mental health interventions for family caregivers are an extremely important part of TBI rehabilitation in Latin America, especially considering familism as a core value in Latino culture.

Examining the influence of three types of social support on the mental health of mexican caregivers of individuals with traumatic brain injury.

OBJECTIVE: The aim of this study was to examine the influence of three types of social support (appraisal, belonging, and tangible) on caregiver mental health (anxiety, burden, depression, and satisfaction with life) among Mexican caregivers of individuals with traumatic brain injury. DESIGN: This is a cross-sectional study of 90 family caregivers from Hospital Civil Fray Antonio Alcade in Guadalajara, Mexico. RESULTS: More months spent caregiving was associated with decreases in all three types of social support. Older age and fewer years of education were associated with lower appraisal social support. More hours per week spent caregiving was associated with lower caregiver state anxiety and greater satisfaction with life. Appraisal, belonging, and tangible social support were all significantly correlated with more salubrious caregiver mental health outcomes, except satisfaction with life. Appraisal social support independently predicted lower caregiver depression. CONCLUSIONS: Particularly in Latin America, strong social support networks and family connections seem closely tied to key mental health outcomes such as depression. Rehabilitation interventions aimed at strengthening perceptions of social support of caregivers of individuals with traumatic brain injury that specifically target availability of advice may improve mental health and contribute to more optimal informal care for individuals with traumatic brain injury.

La distimia en el contexto clínico / Dysthymia in the Clinical Context

La distimia se define como un trastorno afectivo crónico que persiste por lo menos dos años en adultos y un a ño en adolescentes y niños. Según el DSM IV-TR, se clasifica en dos subtipos: la distimia de inicio temprano, antes de los 21 años, y la de inicio tardío después de los 21 años. Generalmente antes de los 21 años se puede observar trastornos de conducta, déficit de atención e hiperactividad y algunos síntomas vegetativos. Es importante distinguir tempranamente la distimia de otros tipos de depresión, a fin de brindar un tratamiento oportuno que atenúe el impacto continuo de síntomas caracterizados por pobre conciencia del estado de ánimo, pensamiento negativo, baja autoestima y anergia, lo que deteriora progresivamente la calidad de vida. La etiología es compleja y multifactorial, dados los variados mecanismos biológicos, psicológicos y sociales involucrados. Varias hipótesis tratan de explicar la etiología de la distimia; destacan la hipótesis genética que incluye además factores ambientales y la hipótesis aminérgica, que apunta a una deficiencia de serotonina, noradrenalina y dopamina en el sistema nervioso central. Desde nuestro punto de vista, no se puede concebir la distimia como un simple trastorno depresivo leve; es una entidad diferente caracterizada por un trastorno depresivo crónico que puede persistir toda la vida, con importantes repercusiones en la calidad de vida, tanto del sujeto que la padece como de sus familiares.

Dysthymia is defined as a chronic mood disorder that persists for at least two years in adults, and one year in adolescents and children. According to DSM IV-TR, Dysthymia is classified into two subtypes: early-onset, when it begins before 21 years-old, and late onset Dysthymia, when it starts after this age. Before age 21, symptoms of conduct disorder, attention deficit disorder and hyperactivity with a few vegetative symptoms are usually present. It is important to distinguish it from other types of depression, as earlier as possible. This would allow providing these patients with the appropriate treatment to attenuate the impact of symptoms, such as poor awareness of self-mood, negative thinking, low self-esteem, and low energy for social and family activities, which progressively deteriorate their life quality. The etiology of Dysthymia is complex and multifactorial, given the various biological, psychological and social factors involved. Several hypotheses attempt to explain the etiology of Dysthymia, highlighting the genetic hypothesis, which also includes environmental factors, and an aminergic hypothesis suggesting a deficiency in serotonin, norepinephrine and dopamine in the central nervous system. From our point of view, dysthymia cannot be conceived as a simple mild depressive disorder. It is a distinct entity, characterized by a chronic depressive disorder which could persist throughout life, with important repercussions on the life quality of both patients and families.

[Dysthymia in the Clinical Context]. / La distimia en el contexto clínico.

Dysthymia is defined as a chronic mood disorder that persists for at least two years in adults, and one year in adolescents and children. According to DSM IV-TR, Dysthymia is classified into two subtypes: early-onset, when it begins before 21 years-old, and late onset Dysthymia, when it starts after this age. Before age 21, symptoms of conduct disorder, attention deficit disorder and hyperactivity with a few vegetative symptoms are usually present. It is important to distinguish it from other types of depression, as earlier as possible. This would allow providing these patients with the appropriate treatment to attenuate the impact of symptoms, such as poor awareness of self-mood, negative thinking, low self-esteem, and low energy for social and family activities, which progressively deteriorate their life quality. The etiology of Dysthymia is complex and multifactorial, given the various biological, psychological and social factors involved. Several hypotheses attempt to explain the etiology of Dysthymia, highlighting the genetic hypothesis, which also includes environmental factors, and an aminergic hypothesis suggesting a deficiency in serotonin, norepinephrine and dopamine in the central nervous system. From our point of view, dysthymia cannot be conceived as a simple mild depressive disorder. It is a distinct entity, characterized by a chronic depressive disorder which could persist throughout life, with important repercussions on the life quality of both patients and families.

Health-related quality of life in caregivers of individuals with traumatic brain injury from Guadalajara, Mexico.

OBJECTIVE: The goal of the present study was to assess the health-related quality of life of a group of family caregivers of individuals with traumatic brain injury from Guadalajara, Mexico. PATIENTS AND METHODS: Ninety family caregivers of individuals with traumatic brain injury and 83 healthy controls completed the Short-Form 36, a self-report health-related quality of life measure composed of 8 component areas: physical functioning, role-physical, bodily pain, general health, vitality, social functioning, mental health, and role-emotional. The samples were statistically similar with respect to age, gender, marital status, and education. However, caregivers had significantly lower household income than controls. RESULTS: After controlling for income, results showed significantly lower scores for traumatic brain injury caregivers compared with healthy controls on 6 Short-Form 36 subscales: role-emotional, vitality, mental health, social functioning, bodily pain, and general health. CONCLUSION: Caregivers of individuals with traumatic brain injury living in Guadalajara, Mexico report having poorer health-related quality of life across various domains including mental and general health. Future studies should be conducted to determine which specific factors (e.g. lack of services, physical strain of providing care) are responsible for reduced health-related quality of life in these areas. It is likely that resources, such as respite services, adult day-care, aides, outpatient rehabilitation, psycho-educational programs, and support groups would increase health-related quality of life for these individuals.

Costo de la atención odontológica por caries dental en estudiantes preuniversitarios mexicanos / Estimated costs of dental care due to dental decay in Mexican high school students

Objetivo: estimar el costo de la atención dado por la prevalencia de caries dental en estudiantes preuniversitarios de la Universidad Nacional Autónoma de México (UNAM). Método: se realizó un estudio transversal descriptivo en una población de 78.870 estudiantes preuniversitarios (efectuado entre 2003 y 2005). La necesidad de tratamiento por caries se determinó por medio del índice de dientes cariados, perdidos y obturados (CPOD), como es indicado en el Examen Médico Automatizado (EMA). La estimación del costo de atención se obtuvo a partir de la sumatoria de los costos directos (material dental) e indirectos (barreras de protección) por diente y por tratamiento, de acuerdo con los precios establecidos para la atención de pacientes en la Facultad de Odontología de la UNAM. Resultados: el 47,3% de los estudiantes presentó caries dental; el 31,9%, pérdida dental, y el 59,1%, obturaciones dentales. El gasto mínimo de atención para el número de dientes cariados (105.029) fue de $27.832.685 (pesos mexicanos); no obstante, para el número de dientes perdidos (101.802) el costo total estimado fue de $77.878.530. Se encontraron diferencias estadísticamente significativas entre el número de dientes con experiencia de caries y el sexo. Conclusiones: los altos costos estimados para la atención del grupo poblacional estudiado en materia de salud dental hacen pensar en la necesidad de establecer programas y metas específicas en los niveles educativos secundario, medio superior y superior, que promuevan favorablemente el autocuidado.

Objective: Estimate the cost of dental care generated by the dental decay prevalence in high school students at Universidad Nacional Autónoma de México (UNAM). Methods: A cross-sectional study was carried out with a population of 78,870 high schoolers (conducted between the years 2003 and 2005). The need for dental caries treatment was determined by the decayed, missing and filled teeth index (DMFT) as it is indicated at the Automated Medical Exam (EMA, acronym in Spanish). The estimation of dental care cost included a combination of direct (dental materials) and indirect costs (protection barriers) per tooth and treatment needed, using the price list for patients attending the dental service at the dental school of UNAM as a reference. Results: 47.3% of the students presented dental cavities, 31.9% lost teeth, and 59.1% had fillings. Minimum dental care expense estimated for decayed teeth (105,029) was $27,832,685 and $77,878,530 (Mexican pesos) for lost teeth (101,802). Statisticallysignificant differences were found when comparing dental caries prevalence and gender. Conclusions: The high dental care costs estimated for the population of high school students studied makes relevant the need for the development of programs and goals at the secondary and tertiary education levels. They should emphasize self-care.

[Dental decay and tooth loss at the high school level in Mexican students]. / Caries y pérdida dental en estudiantes preuniversitarios mexicanos.

OBJECTIVE: To determine the prevalence of dental decay and tooth loss, and to consider the treatment needs for students at the Mexican National Autonomous University (UNAM). MATERIALS AND METHODS: A cross sectional study was designed including 77 191 students corresponding to the years of entrance to high school 2003, 2004 and 2005. Oral health data were obtained from the DMF-T index included in the Automatized Medical Exam (AME), a student self-answer instrument administered by the General Medical Services Department, UNAM. The analysis of the AME was univaried with the purpose of identifying the distribution and frequency of the variables. RESULTS: The prevalence of dental decay and tooth loss was 48.0% and 34.2%, respectively. The DMF-T index was 5. The treatment needs for dental decay and tooth loss for a student were considered as at least one lost tooth. CONCLUSIONS: Approximately half of the students from UNAM high schools need at least restorations and dental prosthesis. This suggests that oral health programs have not yet reached the expected health indexes according to international regulations, as well as the need to develop new research projects directed toward identifying disease severity and the factors that are detrimental to oral health.