Body Height Estimation According to Deciduous Dental Crown Height in a Peruvian Sample of Preschool Children.

Introduction: Odontometry and body height are distinctive biological traits, making their relationship relevant in the identification of individuals. The objective of this study was to estimate body height according to the height of the crown of deciduous teeth in Peruvian preschool children. Materials and Methods: This analytical study was applied to a calculated sample of 204 preschoolers between 3 and 5 years of age (34 per sex/age group) with fully erupted upper anterior deciduous teeth (from #53 to #63). Measurements included body height with a stadiometer (106 ± 6.56 cm; 94-123 cm) and crown height from canine to canine (3.06 mm in #62 to 8.13 mm in #53) in models with digital vernier (intraclass correlation coefficient ≥ 0.781). Linear regression models included calculation of the regression coefficient (ß) to predict height based on crown height for each deciduous tooth at a significance level of P < 0.05. Results: There was no correlation between body height and crown height by tooth type in the total sample (P ≥ 0.05), but there was in a 3-year-old female in #52 (r = 0.4: moderate) and a 5-year-old female in #53 and #63 (r = 0.36-0.38: low) (P < 0.05). Body height prediction equations are shown according to crown height per tooth and sex/age groups. The regressions were significant, explaining 13%-18% of 3-year-old females in #53 and #52 (1.85-1.86 cm error) and 5-year-old females in #53, #51, and #63 (4.61 at 4.63 cm error) (P < 0.05). Conclusions: The odontology method using crown height of the upper anterior deciduous teeth estimated body height in Peruvian girls of 3 and 5 years of age. The teeth are resistant to traumatic forces so these could be used as a body height estimation parameter for forensic human identification.

In Vitro Effect of Mouthrinses on the Microhardness of Three Different Nanohybrid Composite Resins.

Introduction: Daily use of different mouthrinses at home or in the dental office can alter the properties of resin hardness. The present study aimed to compare Vickers microhardness (VHN) in vitro of nanohybrid composite resins (NCRs) immersed in mouthrinses. Materials and Methods: In total, 120 discs (10 ⨯ 2 mm) were prepared from three NCR shade A2 (n = 40/group) with FiltekTM Z350 XT (Z350XT), Tetric EvoCeram (TEC), and Polofil NHT (PNHT). The specimens were incubated in artificial saliva (37°C ⨯ 24 hr). Specimens were distributed into four mouthrinses (n = 10/group) of artificial saliva (control), chlorhexidine (CHX 0.12%, pH 5.6), cetylpyridine chloride (CPC 0.075%, pH 5.84), and CHX 0.12% + CPC 0.05% (pH 6.2) (2 times/day, 2' ⨯ 12 hr). The VHN (300 gf/10") was measured after 24 hr, 14, and 21 days. Data were analyzed by three-way analysis of variance, followed by post hoc Tukey analysis at 0.05 level of significance. Results: The results revealed a global effect of the interaction of the mouthrinses ⨯ time between NRC evaluated (P=0.001). Baseline VHN in PNHT and Z350XT was higher than TEC. Within each group of NCR, VHN of CHX + CPC > other mouthrinses (PNHT/14 days; Z350XT/21 days), and >CPC (Z350XT/14 days). In mouthrinses-intragroups, VHN of PNHT and Z350XT decreased at 14 days (CHX, CPC) and was maintained over time in NCR (CHX + CPC). VHN-TEC was similar among groups. Conclusion: Microhardness showed differences due to the interaction of the type of NCR, the composition of the mouthrinses, and time. VHN decreased after 14 days and was more affected in composite resins with lower filler content and in mouthrinses with a lower pH.

Relationship Between Sagittal Root Position and Alveolar Wall Thickness of Maxillary Teeth in the Esthetic Area for Immediate Implant Treatment Planning in a Peruvian Population.

OBJECTIVE: The purpose of this retrospective study was to assess facial and palatal alveolar wall thickness (AWT) in relation to sagittal root position (SRP) of maxillary anterior teeth using cone-beam computed tomography (CBCT). METHODOLOGY: 102 CBCT images (60 females, 42 males) of anterior maxillary teeth were reviewed. SRP was classified according to Kan's classification, and AWT was evaluated at coronal (4 mm from the cementoenamel junction), mid-root, and apical (2 mm from the apex) levels of the facial and palatal. Secondary variables of sex, age and tooth type were analyzed. RESULTS: The SRP distribution was 76.6% class I, 11.3% class II, 0.8% class III, and 11.3% class IV. AWT, from thickest to thinnest, was found in palatal apical>mid>coronal, followed by facial coronal>mid>apical. CONCLUSIONS: AWT was thickest in SRP class II, followed by class I and III, and least thick in class IV at all measured areas (P<.05). A significantly higher AWT was associated with class I in central incisors, class II in canine teeth and in males, and class IV in central incisors and canines.

[Anxiety level and physiological response to invasive dental treatments. a longitudinal study]. / Nivel de ansiedad y respuesta fisiológica ante tratamientos dentales invasivos. un estudio longitudinal.

Objective: To determine the relationship between the level of anxiety and the physiological response to invasive dental treatments. Materials and methods: A convenience sample of 180 patients was formed (73 men and 107 women) ≥18 years (range: 18-58) undergoing treatment with local anesthetics from three private dental offices in the city of Lima. Measurements were made before, during and after treatment on anxiety according to the IDARE questionnaire of 40 questions (20 trait and 20 state) and their physiological response was evaluated according to oxygen saturation (OS), pulse and blood pressure (BP) measured. with digital pulse oximeter and blood pressure monitor. The Friedman and Spearman correlation tests were used, working with a value of P<0.05. Results: Most patients had a medium level of anxiety before dental treatment (state 49.4% and trait 55.6%). OS, pulse and BP increased after application of the anesthetic and decreased at the end of treatment, with significant differences (P<0.05). Anxiety scores were significantly correlated only with pulse (state: r=0.238-0.564; trait: r=0.174-0.323) and BP (state: r=0.429-0.699; trait: r=0.312-0.465) (P<0.05). Conclusion: State-trait anxiety had a positive relationship with the physiological dimensions of blood pressure and pulse before dental treatment with local anesthetics.

Actualización de la Relación Bidireccional de la Diabetes Mellitus y la Enfermedad Periodontal

RESUMEN: La diabetes mellitus y la enfermedad periodontal son patologías con una alta prevalencia en la población, y su frecuencia va en aumento. Ambas presentan mecanismos comunes de progresión y se manifiestan en términos de comorbilidad. El objetivo de esta revisión fue explicar los mecanismos de asociación bidireccional entre la diabetes mellitus y la enfermedad periodontal. Para ello se desarrolló una búsqueda sistematizada de la información en las bases de datos PubMed, ScienceDirect, Scoopus y EBSCO de los últimos tres años y se seleccionaron aquellos en idioma inglés que incluían las vías de asociación entre la diabetes mellitus y la enfermedad periodontal o viceversa de manera unidireccional o bidireccional. La diabetes mellitus corresponde a un desorden metabólico, el cual se caracteriza por una hiperglucemia producto del defecto en la producción o acción de la insulina, o ambas. En los últimos tiempos se ha hecho énfasis en la influencia que tiene la condición periodontal en el control glucémico de los pacientes diabéticos Esta revisión concluyó que existe una asociación bidireccional de la diabetes mellitus y la enfermedad periodontal, así como la existencia de limitaciones de los estudios para explicar esta relación en términos de causalidad.

ABSTRACT: Diabetes mellitus and periodontal disease are pathologies with a high prevalence in the population, and their frequency is increasing. Both present common mechanisms of progression and manifest themselves in terms of comorbidity. The aim of this review was to explain the mechanisms of two-way association between diabetes mellitus and periodontal disease. For this purpose, a systematic search of the information in PubMed databases wasdeveloped, ScienceDirect, Scoopus and EBSCO of the last three years and selected those in English that included the pathways of association between diabetes mellitus and periodontal disease or viceversa in a unidirectional or bidirectional manner. Diabetes mellitus corresponds to a metabolic disorder, which is characterized by a hyperglycemia product of the defect in the production or action of insulin, or both. In recent times, emphasis has been placed on the influence of the periodontal condition on the glycemic control of diabetic patients. This review concluded that there is a bidirectional association of diabetes mellitus and periodontal disease, as well as the existence of limitations of studies to explain this relationship in terms of causality.