Aberrant occlusal sensitivity in adults with increased somatosensory amplification: a case-control study.

OBJECTIVES: Occlusal sensitivity (OS)-the ability to detect fine objects between opposing teeth-mainly relies on the activity of mechanoreceptors located in the periodontal ligament. We tested whether somatosensory amplification (SSA)-the tendency to perceive normal somatic sensations as being intense, noxious, and disturbing, which plays a critical role in hypervigilance-affects OS. MATERIALS AND METHODS: We measured OS in 66 adults divided into three groups based on their SSA scores (LowSSA, Intermediate - IntSSA, HighSSA) by asking them to bite on aluminum foils (8 to 72 µm thick) and a sham foil, and report whether they felt each foil. We performed 20 trials for each thickness and sham condition (each participant was tested 120 times), and compared the frequency of correct answers (%correct) among groups after adjusting for participants' trait anxiety, depression, self-reported oral behaviors, and masseter cross-sectional area. RESULTS: %correct was affected by the interaction Foil Thickness-by-SSA (p = 0.007). When tested with the 8 µm foil, the HighSSA group had a lower %correct than the IntSSA (contrast estimate [95% CI]: -14.2 [-25.8 - -2.6]; p = 0.012) and the LowSSA groups (-19.1 [-31.5 - -6.6]; p = 0.001). Similarly, with the 24 µm foil, the HighSSA group had a lower %correct compared to the IntSSA (-12.4 [-24.8-0.1]; p = 0.048) and the LowSSA groups (-10.8 [-22.5-0.8]; p = 0.073). CONCLUSION: Individuals with high SSA present with an aberrant occlusal sensitivity. CLINICAL RELEVANCE: Our findings provide novel insights into the relationship between occlusal perception and psychological factors, which may influence an individual's ability to adapt to dental work.

Methods to teach schoolchildren how to perform and retain cardiopulmonary resuscitation (CPR) skills: A systematic review and meta-analysis.

Background: Worldwide, bystander CPR rates are low; one effective way to increase these rates is to train schoolchildren; however, the most effective way to train them is currently unknown. Methods: This systematic review and meta-analysis of randomized controlled trials (RCTs) and observational studies, evaluated whether CPR training for schoolchildren, using innovative teaching modalities (nonpractical, self, or peer-training) versus standard instructor-led training, resulted in higher quality CPR, self-confidence and short-term (≤3 months post-training) or long-term (>3 months post-training) retention of CPR skills. Results: From 9793 citations, 96 studies published between 1975 and 2022 (44 RCTs and 52 before/after studies) were included. There were 43,754 students, average age of 11.5 ±â€¯0.9 (range 5.9-17.6) and 49.2% male. Only 13 RCTs compared practical vs. nonpractical training (n = 5), self- vs. instructor-led training (n = 7) or peer- vs. instructor-led training (n = 5). The observed statistically significant differences in mean depth and rate of compressions between children with hands-on practical training and those without were not clinically relevant. Regardless of training modality, compression depth was consistently suboptimal. No differences were observed in CPR skills immediately or ≤ 3 months post-training, between children who were self- or peer-trained vs. instructor-led. Due to lack of data, we were unable to evaluate the impact of these novel training modalities on student self-confidence. Conclusion: Although innovative training modalities are equally effective to instructor-led training when teaching schoolchildren CPR, compression depth was frequently suboptimal. Recommendations on standardized training and evaluation methods are necessary to understand the best ways to train children.