Determining the safety of the tobacco cembranoid (1S,2E,4R,6R,7E,11E)-Cembratriene-4,6-diol (4R): A translational study in nonhuman primates.

The tobacco cembranoid known as (1S,2E,4R,6R,7E,11E)-2,7,11-cembratriene-4,6-diol (4R) has been shown to offer neuroprotection against conditions such as brain ischemia, systemic inflammation, Parkinson's disease, and organophosphate toxicity in rodents. Previous safety studies conducted on male and female Sprague Dawley rats revealed no significant side effects following a single injection of 4R at varying concentrations (6, 24, or 98 mg/kg of body weight). This study aimed to assess the potential of 4R for clinical trials in neurotherapy in male nonhuman primates. Ten macaques (Macacca mulatta) were randomly separated into two groups of 5 and then intravenously injected with 4R or vehicle for 11 consecutive days at a dose of 1.4 mg/kg. Throughout the study, we monitored brain activity by electroencephalogram, somatosensory evoked potentials, and transcranial motor evoked potentials on days 0, 4, 8, and 12 and found no significant changes. The spontaneous behavior of the primates remained unaffected by the treatment. Minor hematological and blood composition variations were also detected in the experimental animals but lacked clinical significance. In conclusion, our results reinforce the notion that 4R is non-toxic in nonhuman primates under the conditions of this study.

Downregulation of miRNA-26 in chronic periodontitis interferes with innate immune responses and cell migration by targeting phospholipase C beta 1.

AIM: To evaluate the potential role of miR-26 family members in periodontal pathogenesis by assessing innate immune responses to periopathic bacteria and regulation of cytoskeletal organization. MATERIALS AND METHODS: Expression of miR-26a-5p and miR-26b-5p was quantified in gingival biopsies derived from healthy and periodontally diseased subjects before and after non-surgical (scaling and root planing) therapy by RT-qPCR. Global pathway analysis and luciferase assays were performed for target identification and validation. Cytokine expression was assessed in miR-26a-5p transfected human oral keratinocytes upon stimulation with either live Porphyromonas gingivalis (Pg), Aggregatibacter actinomycetemcomitans or Pg lipopolysaccharide (LPS). Wound closure assays were performed in cells transfected with miR-26a-5p, while the impact on cytoskeletal organization was assessed by F-actin staining. RESULTS: miR-26a-5p and miR-26b-5p were downregulated in diseased gingiva and restored 4-6 weeks post-therapy to levels comparable with healthy subjects. Target validation assays identified phospholipase C beta 1 as a bona fide novel target exhibiting antagonistic expression pattern in disease and post-therapy cohorts. miR-26a-5p transfected cells secreted higher levels of cytokine/chemokines upon stimulation with periopathogens and demonstrated impaired cell migration and cytoskeletal rearrangement. CONCLUSIONS: Downregulated miR-26a-5p levels in periodontal inflammation may interfere with key cellular functions that may have significant implications for host defence and wound healing.

Prevalence, Severity, and Risk Factors of Gingival Inflammation in Caribbean Adults: A Multi-City, Cross-Sectional Study.

OBJECTIVE: To estimate the prevalence, severity, and associated risk factors of gingival inflammation in a group of adults from Kingston, Jamaica; Santo Domingo, Dominican Republic; and San Juan, Puerto Rico. METHODS: In this representative cross-sectional study, participants completed medical and oral health questionnaires and received an oral clinical examination by trained and calibrated examiners. Clinical assessments included: gingival health (modified Löe-Silness index), visible plaque and presence of calculus. Findings were summarized as mean overall and interproximal gingival indices (GI; IGI), gingival bleeding index (GBI), gingival inflammation prevalence (GI>=0.5) and severity (mild, moderate, severe), mean and interproximal visible plaque indices (VPI; IVPI), and calculus index. Multivariate logistic regression was used to evaluate the associations between risk factors and gingival bleeding on probing (BOP) at >= 40% sites;. odds ratios were estimated. RESULTS: All 1,847 participants presented gingival inflammation; most (81.9%) had moderate inflammation. Mean GI, VPI, IVPI, and calculus indices were 1.49, 0.94, 0.96, and 0.66, respectively; most participants presented a VPI >= 30%. BOP >= 40% of sites was significantly associated with education (ORmiddle/technical vs. university education=1.61; p =0.001 and ORnone/basic vs. university= 2.86; p<0.001), calculus index (OR: 10.35), VPI >= 30% (OR: 7.85; p<0.001 for both), and being a resident of Kingston or Santo Domingo (vs. San Juan, OR: 4. 74 and OR: 7.09, respectively), after adjusting for age, gender, smoking, dental visit frequency, diabetes, and hypertension. CONCLUSION: Gingival inflammation was highly prevalent. Most participants presented moderate gingival inflammation. Educational attainment, dental calculus, and VPI >= 30% were strongly associated with gingival inflammation.

Prevalence of gingivitis and calculus in 12-year-old Puerto Ricans: a cross-sectional study.

BACKGROUND: Gingivitis is a common oral health problem. Untreated gingivitis may progress to periodontitis, a common cause of tooth loss. The prevalence of gingivitis and calculus among Puerto Rican children is unknown. Understanding this prevalence can support early public health preventative strategies. This study aims to estimate the prevalence of gingivitis and calculus among 12-year-old Puerto Ricans by health region and to explore differences in distribution by school type (proxy for socio-economic status) and gender. METHODS: A probability-based sample of 113 schools was selected proportional to enrollment size and stratified by health region, school type, and gender. Two trained examiners evaluated the presence of gingivitis and both supragingival and subgingival dental calculus. Gingivitis was defined as the presence of gingival bleeding upon gentle probing (BOP) in at least one site, and the extent of the problem was classified according to the percentage of teeth whose gingiva presented BOP (limited: 25-49% of the teeth tested; extensive: >50% of teeth tested). Logistic and linear regression models, adjusted for health regions, were used to compare gingivitis and calculus prevalence and extent between genders and school types. RESULTS: Gingivitis was found in 80.41% of the 1586 children evaluated. Urban-public schoolchildren had a slightly higher prevalence (83.24%) compared to private (79.15%, p = 0.16); those in rural-public (77.59%) and private schools had similar prevalence (p = 0.15). Extensive gingivitis was present in 60.81% of all children. The mean percentage of sites presenting BOP (BOP%) was 17.79%. Rural and urban public schoolchildren presented significantly higher BOP% compared to children from private schools (p = 0.0005, p = 0.002, respectively). Dental calculus was detected in 61.59% of the sample, boys presenting significantly higher (p = 0.005) total and supragingival calculus. Rural-public schoolchildren had a significantly higher prevalence of subgingival calculus compared to private schoolchildren (p = 0.02). CONCLUSIONS: Gingivitis prevalence is higher among 12-year-old Puerto Ricans compared to data reported for U.S. adolescents. Public schoolchildren presented significantly higher BOP% sites compared to private schoolchildren. Boys presented a significantly higher total and supragingival calculus prevalence than girls. Oral health disparities related to gender and school type were identified by this study. Studies exploring the reasons for these disparities are recommended.

Prevalence of Malocclusion and Distribution of Occlusal Characteristics in 13- to 18-year-old Adolescents Attending Selected High Schools in the Municipality of San Juan, PR (2012-2013).

OBJECTIVE: A cross-sectional study was conducted (2012-2013) to evaluate the prevalence of 1) malocclusion and 2) occlusal characteristics in 13- to 18-yearold adolescents in San Juan, Puerto Rico (PR) from selected high schools in the municipality of San Juan. METHODS: The study sample consisted of 155 adolescents. The University of Puerto Rico's IRB approved the study and consent and assent were completed for or by each participant, as applicable. A calibrated dentist performed a single-visit dental evaluation at each school. Occlusal characteristics were measured and recorded according to the criteria reported in the US National Health and Nutrition Examination Survey (NHANES III) and included overjet, overbite, anterior and posterior crossbites, incisor irregularity, maxillary midline diastema and Angle's classification. Descriptive and inferential statistical analyses were performed using SAS statistical software. RESULTS: The mean age of the study subjects was 16 (±1.2) years; all subjects (100%) presented at least 1 abnormal occlusal trait. The most frequent anomaly noted was maxillary malalignment (83%), followed by lower incisor irregularity and excessive overbite (79%) and excessive overjet (63%); the least common occlusal trait was open bite (1.9%). Compared by gender, no statistically significant difference was observed for any variable (p = 0.05). Seventy-three percent (73%) of the subjects presented with Class I malocclusion, 7.1% with Class II malocclusion and 19.4% with Class III malocclusion. CONCLUSION: A high prevalence of malocclusion was observed in this group of adolescents, highlighting the need to implement preventive measures to improve oral health in this population.

Prevalence of Gingivitis in a Group of 35- to 70-Year-Olds Residing in Puerto Rico.

OBJECTIVE: Gingivitis, an inflammation of the gingival tissues, typically progresses to periodontitis. The objective of this study is to estimate the prevalence of gingivitis in 35- to 70-year-olds residing in San Juan, Puerto Rico, and assess the differences in gingivitis distribution between age and gender groups. METHODS: A cross-sectional epidemiological study was conducted with a sample of patients from a private practice and patients/employees of the Puerto Rico Medical Center. Participants completed a medical history questionnaire and received soft/hard tissue and gingival assessments based on a modified Löe-Silness index. Descriptive statistics were employed to estimate the overall gingivitis prevalence, severity (mild, moderate, severe), and mean gingival index (GI). Bleeding on probing (BOP) prevalence and the mean percentage of BOP sites were calculated by gender and age. Multinomial logistic regression was used to evaluate the associations between age, gender, and severity in 3 categories; multivariate logistic regression was used for having >=40% sites with BOP (vs. having <40% sites with BOP as reference). Odds ratios were also estimated. RESULTS: All 300 participants (52% women; 48% men) had gingivitis. The mean GI was 1.38. Moderate gingivitis was detected in 83% of the participants, mild in 7.3%, and severe in 9.3%. BOP was observed in 99% of the subjects (mean % BOP sites = 34%). After adjusting for age, men had significantly higher odds of moderate (OR = 4.66) and severe gingivitis (OR =10.06), compared to women, as well as 1.76 times higher odds of having 40% or more sites with BOP. CONCLUSION: Gingivitis was observed in all participants. Men had significantly higher GI, compared to women. The prevalence of gingivitis was higher in Puerto Rico than in the US.

Fine-Needle Thyroid Aspiration Biopsy: Clinical Experience at the Endocrinology Clinics of the University Hospital of Puerto Rico.

OBJECTIVE: This study aimed to establish a profile of the ultrasound-guided thyroid fine-needle aspiration biopsies (FNABs) performed at the endocrinology clinics of the University Hospital of Puerto Rico. METHODS: A retrospective study was conducted to assess all the thyroid FNABs performed from July 1, 2011, to December 31, 2013. Data on socio-demographic, FNAB cytology, surgery, and histopathology were collected from medical records. A chi-square test was used to assess associations between predictors and outcome. McNemar's test was used to compare FNAB cytology and histopathology results. RESULTS: A total of 240 FNABs were performed on 192 patients; 91.2% were female. The distribution of the cytological diagnoses was as follows: 181 (75.4%) were benign; 39 (16.3%) were non-diagnostic; 15 (6.3%) were indeterminate; and 5 (2.1%) were malignant. A malignant cytology was more likely in patients younger than 45 y/o than in their older counterparts (p = 0.01); a similar result was found for patients who smoked vs. those who did not (p = 0.02). Benign nodules were more likely to be larger than 1 cm than were those that were malignant (88.2% vs. 25%). Histopathology results were available for 38 nodules; there were no statistically significant differences between the cytology and histopathology results (p>0.05). The sensitivity and specificity for FNAB cytology were 75% and 100%, respectively. Of the nodules with an initial indeterminate cytology (47%), 71% demonstrated, ultimately, benign histopathology. CONCLUSION: In our study, most of the FNABs performed yielded a benign cytology. A high concordance was shown between cytology and histology. For those with indeterminate cytology, the majority of cases demonstrated benign histopathology. These data suggest the need to implement other approaches, such as the development and subsequent use of molecular markers, to improve our diagnostic and therapeutic strategies, this according to our population-based disease prevalence.

Association between Type, Amount, and Pattern of Carbohydrate Consumption with Dental Caries in 12-Year-Olds in Puerto Rico.

OBJECTIVE: To identify the types, food sources, and pattern of carbohydrates that significantly contribute to dental caries in Puerto Rican children. METHODS: As part of an island-wide cross-sectional oral health study in 1,587 twelve-year-olds, diet intake was assessed in a representative subset (n = 801) with a 24-hour dietary recall. Carbohydrate intake was quantified using a computer-based diet analysis program. Caries was assessed using the National Institute of Dental and Craniofacial Research diagnostic criteria. Odds ratios were used to associate carbohydrate intake quartiles with caries, after controlling for important confounders. RESULTS: A total of 723 subjects had complete data. Most were females (54%) and attended public schools (77%). The caries prevalence was 33%. The highest quartile intake for the following sugars significantly increased the odds of caries compared to the lowest quartile: total carbohydrates (OR = 1.93, 95% CI = 1.08-3.46), total sugars (OR = 1.88, 95% CI = 1.01-351), sucrose (OR = 2.05, 95% CI = 1.13-3.70), fructose (OR = 1.95, 95% CI = 1.05-3.62), and inositol (OR = 2.52, 95% CI = 1.38-4.63). The main food sources of these sugars were juices, including natural juices with no added sugars, and sweetened beverages. The odds of caries also increased significantly in children whose 10% of total energy intake was from total sugars (OR = 3.76, 95% CI = 1.03-13.7). CONCLUSION: After adjusting for important caries risk factors, total carbohydrates, total sugars, ≥10% kilocaloric energy from total sugars, and sucrose, fructose, and inositol intake significantly increased caries risk. Our findings can help raise awareness about the potential caries risk from the main sources of these sugars, natural fruit juices and sweetened beverages, which are consumed in great quantities in many societies.

Persistent oral health disparity in 12-year-old Hispanics: a cross-sectional study.

BACKGROUND: Dental caries is the most prevalent chronic illness worldwide. In the US dental caries has been described as a "silent epidemic", affecting 58.2 % of 12-15 year-olds, particularly in minority and immigrant groups. Caries is associated with complex yet preventable biological and behavioral factors such as dental plaque and diet, as well as social determinants of health. In developed nations, a higher risk caries has been associated with populations of low socio-economic status (SES), especially in areas with greater income disparity. An island-wide study conducted in Puerto Rico in 1997 revealed a high prevalence of dental caries in 12-year-olds and a significant health disparity between children attending private and public schools. The purpose of the present study was twofold: 1) to estimate caries levels of 12-year-old school Puerto Ricans in 2011; and 2) compare results to data obtained in 1997 to explore any possible change in caries outcomes after a government health insurance (GHI) reform was implemented. METHODS: In this cross-sectional study, a probability sample of 133 out of 1,843 schools was selected proportional to enrollment size, and stratified by 1997 GHI regions, school type, and gender. Calibrated examiners conducted oral soft tissue and caries examinations. Dental caries prevalence was estimated. Mean Decayed Missing Filled Tooth/Surface (DMFT/S) indices and mean Significant Caries Index (SiC) were calculated and compared retrospectively to data obtained in 1997. RESULTS: The final sample included 1,587 school-enrolled children. About 53 % of participants were female and 77 % attended public schools. Between 1997 and 2011, reductions were observed in caries prevalence (81 to 69 %), mean DMFT scores (3.8 to 2.5), mean DMFS scores (6.5 to 3.9), and mean SiC index (7.3 to 5.6) in both private and public schools, with a more prominent decrease in private schools. Between 1997 and 2011, overall the filled component increased (50 to 67 %), while decayed and missing component decreased (42 to 30 %) and (8 to 3 %), respectively. CONCLUSIONS: Among 12-year-old schoolchildren in Puerto Rico between 1997 and 2011, caries prevalence, extent, and severity decreased as well as the DMFT missing component, while the filled component increased. Dental caries prevalence was high and the health disparity persists between children enrolled in public and private schools after more than a decade of the GHI implementation. The relationship between GHI implementation and other potentially relevant co-factors for caries warrants further research, as does the seemingly entrenched disparity across groups.

Success and complications of implant-retained prostheses provided by the Post-Doctoral Prosthodontics Program, University of Puerto Rico: a cross-sectional study.

STATEMENT OF PROBLEM: The success rate of implant-retained prostheses in a postdoctoral prosthodontics program was unknown and could not be related to any set of potential clinical issues or patient characteristics. PURPOSE: The purpose of this study was to determine the success rate of implant-retained prostheses placed by prosthodontic residents between 1997 and 2012 and to evaluate the associations between patient classifications and specific restoration characteristics as related to prosthesis success or failure. MATERIAL AND METHODS: A total of 272 prostheses in 119 patients were clinically evaluated. Success was defined as the absence of prosthetic complications or any implant-related complication that affected prosthesis survival. Logistic regression was used to evaluate associations between prosthesis success/failure and a wide array of study variables, adjusting for patient age, sex, and prosthesis longevity. RESULTS: The overall success rate was 71%, with a mean prosthesis age of 4.5 years (range: 4 months to 16.8 years). Implant single crowns were the most successful prosthesis type (81% success). The most common complications observed were porcelain fractures in fixed dental prostheses (15%) and lack of stability (31%) and retention (29%) in removable dental prostheses. Having a removable prosthesis (versus natural dentition) in the opposing occlusion significantly decreased the odds of success (OR=0.26, 95% CI: 0.11-0.64). Definitively cemented fixed prostheses were more successful than those cemented with an interim cement (OR=4.56, 95% CI: 1.37-15.22). CONCLUSIONS: The overall success rate of the implant-retained prostheses placed in the program was low compared with previously published studies. This study revealed the need for an efficient, comprehensive recall system for patients receiving implant-retained prostheses, either fixed or removable.

Prevalence of hypodontia in 10- to 14-year-olds seeking orthodontic treatment at a group of clinics in Puerto Rico.

OBJECTIVE: To estimate the prevalence of hypodontia in a group of 10- to 14-year-olds from a group of orthodontic clinics in Puerto Rico. METHODS: A cross-sectional study was conducted to estimate the prevalence of hypodontia in 10- to 14-year-olds from orthodontic clinics located in each of 9 regions (as determined by the government-run health insurance program, Reforma) in Puerto Rico. A total of 1,911 patients, ranging in age from 10 to 14 years, were evaluated using patient charts covering from May 2004 through June of that same year. A logistic regression model was done to evaluate the relation between the prevalence of hypodontia in the study group and clinic location, gender, and age; a 5% significance level was used. RESULTS: The overall weighted prevalence of hypodontia was 6.02%. Females showed a higher weighted prevalence of hypodontia than did males (7.02% vs. 4.72%, respectively: p = 0.06). The prevalence also varied by geographic region, ranging from 3.21% at the San Juan clinic to 10.68% at the Aibonito clinic (p = 0.01). The most prevalent missing teeth were the maxillary lateral incisors, followed by the lower second premolars (1.9%). CONCLUSION: The prevalence of hypodontia in Puerto Rico was 6.02%. Females presented a higher prevalence of hypodontia than did males. Each of the clinics in Fajardo, Bayamón, San Juan, and Guayama had a lower prevalence of hypodontia than the Aibonito clinic did. The tooth most frequently missing in the study group was the maxillary right lateral incisor.

Periodontal Health Knowledge and Oral Health-Related Quality of Life in Caribbean Adults.

PURPOSE: To identify the relationship between periodontal health knowledge and oral health-related quality of life among Caribbean adults. MATERIALS AND METHODS: A cross-sectional study was conducted in a representative sample from 3 Caribbean cities (weighted N = 1805). Participants completed a questionnaire on oral health knowledge, hygiene habits, and other practices, as well as the Oral Health Impact Profile-14 (OHIP-14) questionnaire. The associations between knowledge and habits and OHIP-14 score and its tertiles were evaluated using negative binomial and multinomial logistic regression models, respectively, adjusting for confounders. Odds ratios and regression coefficients were reported. RESULTS: Participants reporting none, little, and adequate knowledge about gum health had higher odds of being in the worst tertile for OHRQoL, compared to those reporting "good knowledge" (ORnone vs good = 2.38, 95% CI: 1.59-3.54; ORlittle vs good = 1.82, 95% CI: 1.19-2.78; ORadequate vs good = 1.68, 95% CI: 1.11-2.57). Participants reporting toothbrushing ≥ twice/day were less likely to be in the worst tertile for OHRQoL, compared to those brushing less often (OR = 0.67, 95% CI: 0.48-0.92). Self-reported gum bleeding was associated with double the odds of being in the worse tertile (OR = 2.03, 95% CI: 1.60-2.58). CONCLUSION: According to the findings of this study, periodontal health knowledge is associated with reduced OHRQoL in Caribbean Adults. In addition, the frequency of brushing and the self-reported gum bleeding was related to a worse quality of life (QoL) level.

Oral Health Knowledge and Oral Hygiene Habits in a Sample of 12-Year-Old Hispanics: A Cross-sectional Study.

OBJECTIVE: To explore the association between hygiene knowledge and habits and gingivitis in Puerto Rican school children. METHODS: Questionnaires on oral health knowledge and hygiene habits were provided to almost half of the 12-year-olds who participated in an island-wide cross-sectional oral health study. The evaluations included gingival examinations in 2 quadrants. Odds ratios (ORs) (with 95% CIs) were computed using logistic regression models and oral health-related knowledge and hygiene habits to gingivitis. RESULTS: Of the 823 participants who completed the questionnaire 53.43% were female, and 81% had gingivitis. Most reported having received instructions on brushing (98%), flossing (89.5%), and using mouthwash (90%). The majority (75%) rated their gums as healthy, and 44.68% agreed that oral health affects general health. Nearly half (44%) reported brushing their teeth at least 2 times a day, and 80.25%, flossing daily. In multivariate analysis, not having been instructed on how to brush was related to greater odds of having gingivitis (OR: 7.32; 95% CI: 1.5-35.67). Flossing more than once a day was associated with half the odds of gingivitis (OR: 0.50; 95% CI: 0.29-0.88). CONCLUSION: The children had knowledge of oral hygiene methods but were mostly unaware that gingival health could affect systemic health. Fewer than half reported brushing 2 or more times a day. Not having been instructed on how to brush was associated with higher odds of gingivitis.

Association of Gut Microbiota-Related Metabolites and Type 2 Diabetes in Two Puerto Rican Cohorts.

(1) Aims: Gut microbiota metabolites may play integral roles in human metabolism and disease progression. However, evidence for associations between metabolites and cardiometabolic risk factors is sparse, especially in high-risk Hispanic populations. We aimed to evaluate the cross-sectional and longitudinal relationships between gut microbiota related metabolites and measures of glycemia, dyslipidemia, adiposity, and incident type 2 diabetes in two Hispanic observational cohorts. (2) Methods: We included data from 670 participants of the Boston Puerto Rican Health Study (BPRHS) and 999 participants of the San Juan Overweight Adult Longitudinal Study (SOALS). Questionnaires and clinical examinations were conducted over 3 years of follow-up for SOALS and 6 years of follow-up for BPRHS. Plasma metabolites, including L-carnitine, betaine, choline, and trimethylamine N-oxide (TMAO), were measured at baseline in both studies. We used multivariable linear models to evaluate the associations between metabolites and cardiometabolic risk factors and multivariable logistic and Poisson regressions to assess associations with prevalent and incident type 2 diabetes, adjusted for potential confounding factors. Cohort-specific analyses were combined using a fixed-effects meta-analysis. (3) Results: Higher plasma betaine was prospectively associated with lower fasting glucose [-0.97 mg/dL (95% CI: -1.59, -0.34), p = 0.002], lower HbA1c [-0.02% (95% CI: -0.04, -0.01), p = 0.01], lower HOMA-IR [-0.14 (95% CI: -0.23, -0.05), p = 0.003], and lower fasting insulin [-0.27 mcU/mL (95% CI: -0.51, -0.03), p = 0.02]. Betaine was also associated with a 22% lower incidence of type 2 diabetes (IRR: 0.78, 95% CI: 0.65, 0.95). L-carnitine was associated with lower fasting glucose [-0.68 mg/dL (95% CI: -1.29, -0.07), p = 0.03] and lower HbA1c at follow-up [-0.03% (95% CI: -0.05, -0.01), p < 0.001], while TMAO was associated with higher fasting glucose [0.83 mg/dL (95% CI: 0.22, 1.44), p = 0.01] and higher triglycerides [3.52 mg/dL (95% CI: 1.83, 5.20), p < 0.0001]. Neither choline nor TMAO were associated with incident type 2 diabetes. (4) Conclusions: Higher plasma betaine showed consistent associations with a lower risk of glycemia, insulinemia, and type 2 diabetes. However, TMAO, a metabolite of betaine, was associated with higher glucose and lipid concentrations. These observations demonstrate the importance of gut microbiota metabolites for human cardiometabolic health.

3D Accuracy of a Conventional Method Versus Three Digital Scanning Strategies for Completely Edentulous Maxillary Implant Impressions.

PURPOSE: To compare the 3D accuracy of three scanning strategies and conventional impressions using an edentulous model with six implants. MATERIALS AND METHODS: An edentulous maxillary master model was fabricated with six equigingival internal connection implants at 0 degrees of angulation. Ten conventional open-tray splinted implant-level impressions were made and poured in stone. A master model and conventional casts were digitized with a reference scanner. Digital impressions were made by calibrated clinicians with a TRIOS 3 intraoral scanner ([IOS] 3Shape) according to three scanning strategies: DIG1 (occlusal-palatal-lingual), DIG2 (S-type motion from buccal to palatal), and DIG3 (scanning two half arches and connecting them at the midline). Each technique was repeated 10 times on the master model. Deviations from the STL datasets (N = 40) were compared to those of the reference master model using the Hexagon Metrology software system PC-DMIS CAD++. Linear distortions (dX, dY, dZ), global linear distortion (dR), and angular distortions (Absdθx, Absdθy) were calculated. Kruskal-Wallis test and mixed linear and logistic regression models were used to compare the original and binary distortion measures between the techniques. RESULTS: The mean dR ranged from 91 µm (conventional method) to 183 µm (DIG1). The mean angular distortion ranged from 0.20 degrees (Absdθx for DIG2) to 0.69 degrees (Absdθy for DIG3). No scan pattern resulted in a more accurate reproduction in any of the measured parameters than the conventional impression method. There were significant differences between the methods for all distortion measures. CONCLUSIONS: No group reproduced the 3D position of the six-implant master model below the thresholds for both global linear and angular distortions. All the digital strategies tested were less accurate than the conventional open-tray splinted implant-level impression technique.

Comparison of Corticotomy and Micro-osteoperforation during Canine Retraction: A Split-Mouth Design.

OBJECTIVE: Compare the efficacy of the micro-osteoperforation (MOP) and corticotomy techniques in terms of maxillary canine retraction. METHODS: Thirteen patients (5 females, 8 males; mean age, 18.07 ± 6.74 years) with healthy permanent dentition and requiring the extraction of maxillary first premolars were included in a split-mouth randomized clinical trial. Those subjects with previous orthodontic or endodontic treatment of the canines were excluded. At least 3 months post-extraction, MOPs and corticotomies were performed distal to the canines. Mini-screws with closed-coil springs (150 g) were used for the canine retraction. Dental casts were made at baseline (T0) and 3 months post-intervention (T1). Trained and calibrated examiners measured the distances from the canines to the second premolars on both sides. A signed-rank sum test was used to compare the amount of canine retraction achieved in 3 months (T0-T1) on the 2 sides. RESULTS: Retraction (mm) at the incisal level was similar in the corticotomy (3.34 ± 1.01) and MOP patients (2.74 ± 1.10) (P = 0.11); furthermore, there were no differences in the degree of medial retraction between the corticotomy (2.56 ± 0.67) and MOP (2.27 ± 0.82) (P = 0.31) procedures. No adverse events were observed. CONCLUSION: There were not any clinically or statistically significant differences in retraction between the interventions. At 3 months, a MOP is as effective as a corticotomy in accelerating the rate of tooth movement.

Pre- and peri-natal hurricane exposure alters DNA methylation patterns in children.

Hurricane Maria was the worst recorded natural disaster to affect Puerto Rico. Increased stress in pregnant women during and in the aftermath of the hurricane may have induced epigenetic changes in their infants, which could affect gene expression. Stage of gestation at the time of the event was associated with significant differences in DNA methylation in the infants, especially those who were at around 20-25 weeks of gestation when the hurricane struck. Significant differences in DNA methylation were also associated with maternal mental status assessed after the hurricane, and with property damage. Hurricane Maria could have long lasting consequences to children who were exposed to this disaster during pregnancy.

Novel Plasma Metabolomic Markers Associated with Diabetes Progression in Older Puerto Ricans.

We assessed longitudinal associations between plasma metabolites, their network-derived clusters, and type 2 diabetes (T2D) progression in Puerto Rican adults, a high-risk Hispanic subgroup with established health disparities. We used data from 1221 participants free of T2D and aged 40-75 years at baseline in the Boston Puerto Rican Health and San Juan Overweight Adult Longitudinal Studies. We used multivariable Poisson regression models to examine associations between baseline concentrations of metabolites and incident T2D and prediabetes. Cohort-specific estimates were combined using inverse-variance weighted fixed-effects meta-analyses. A cluster of 13 metabolites of branched chain amino acids (BCAA), and aromatic amino acid metabolism (pooled IRR = 1.87, 95% CI: 1.28; 2.73), and a cell membrane component metabolite cluster (pooled IRR = 1.54, 95% CI: 1.04; 2.27) were associated with a higher risk of incident T2D. When the metabolites were tested individually, in combined analysis, 5 metabolites involved in BCAA metabolism were associated with incident T2D. These findings highlight potential prognostic biomarkers to identify Puerto Rican adults who may be at high risk for diabetes. Future studies should examine whether diet and lifestyle can modify the associations between these metabolites and progression to T2D.

Socio-Demographic and Medical Characteristics of Patients With Odontogenic Infection Admitted to the Adult University Hospital in Puerto Rico: A Cross-sectional Study.

OBJECTIVE: We aimed to estimate the overall distribution of odontogenic infection by socio-demographic and medical characteristics in patients admitted to the Adult University Hospital (AUH) in Puerto Rico (PR). METHODS: A cross-sectional study was undertaken with the medical charts of 129 patients (≥21 years) with odontogenic infection who had been admitted (2011-2015) to the AUH and treated by the Oral and Maxillofacial Surgery Post - graduate Program of the University of PR. The patients were selected from the hospital's billing database after having been identified using the International Classification of Diseases (9th and 10th revisions). The study variables included age, gender, municipality of residence, medical insurance, infection etiology, surgical and antibiotic treatments, length of stay (LOS), and the presence of diabetes. Descriptive and frequency statistics were calculated for all the variables; chi-squared, Kruskal-Wallis, Kendall tau, and Mann-Whitney tests were performed. A P < .05 was considered statistically significant. RESULTS: The mean age of the subjects was 40.36 (SD: 14.74) years, and they ranged in age from 21 to 81 years; the majority were enrolled in the public health insurance plan of PR. The leading cause of infection was dental caries. Diabetes was associated with longer LOSs; P < .01. CONCLUSION: In our study, the relative frequency of admitted patients with an odontogenic infection, most of them with low income, increased over time with dental caries being the principal cause of infection.