Morphological and numerical characteristics of the southern Chinese dentitions. Part II: traits in the permanent dentition

Aim: To investigate the prevalence of four major dental traits in the southern Chinese permanent dentition and to compare these with studies from different populations. Materials and Methods: The material used in the study consisted of high quality study models collected from 725 randomly selected 12-year-old children in Hong Kong (358 males and 367 females). The various traits were assessed using standard diagnostic criteria. Literature and data related to dental traits in the permanent dentition were sourced using PubMed and hand searches. Results: The mouth prevalence of shovelling, lingual tubercle, Carabelli’s trait, and protostylid were 80.4%, 38.9%, 50.5% and 37.5% respectively. The prevalence figure for the cusp type of Carabelli’s trait in this study (23.7%) was higher than for other Mongoloids. The prevalence figures for semi-shovel shaped maxillary incisors (42.6% to 48.6%) and the cusp type of protostylid trait in mandibular molars (10.1%) were higher than for any other populations. Conclusion: The higher prevalences of semi-shovel shaped maxillary incisors, and protostylid cusp on the mandibular molars can be considered to be characteristics of the southern Chinese permanent dentition.published_or_final_versio

Morphological and numerical characteristics of the southern Chinese dentitions. Part I: anomalies in the permanent dentition

Aim: To investigate the prevalence of eight morphological and numerical anomalies in the southern Chinese permanent dentition and to compare these with studies from different populations. Materials and Methods: The material used in the study consisted of study models and panoramic radiographs collected from 725 randomly selected 12-year-old children (358 males and 367 females). The anomalies were assessed using diagnostic criteria that have been most often cited in the published literature. Results: Of the eight dental anomalies studied, the prevalence of hyperdontia (2.6%) was higher than reported for Caucasians, and double tooth (0.8%) and dens evaginatus (4.7%) were the highest amongst all of the populations. Although the prevalence of hypodontia (7.3%) is comparable to that of other populations, mandibular incisors were the most frequently missing teeth in southern Chinese (5.6%) and this finding contradicted those from studies of other ethnic groups. Conclusion: Higher prevalences of double tooth, dens evaginatus and missing mandibular incisors can be considered to be characteristics of the southern Chinese permanent dentition.published_or_final_versio

The dental knowledge and attitudes of medical practitioners and caregivers of pre-school children in Macau

The dental knowledge and attitudes of medical practitioners and caregivers of pre-school children in Macau were investigated. The caregivers of 353 children (2.8 ± 0.6 years) from seven nursery centers completed a questionnaire and their children's had their teeth examined. Thirty medical practitioners completed the same questionnaire prior to a dental health seminar. The dental knowledge and attitudes of the medical practitioners were found to be better than those of the caregivers. Topics, such as, "acid can cause caries"; "fluoridated water can prevent caries" and "primary teeth play a role in the development of the permanent teeth" were significantly associated with caries in the caregivers' children (p<0.05). It is hypothesised that the medical practitioners had not conveyed their dental knowledge to the caregivers early enough so as to prevent the occurrence of caries in their children.link_to_subscribed_fulltex

Pulmonary cavitary Mycobacterium kyorinense (M. kyorinense) infection in an Australian woman

We describe a patient with pulmonary cavitary pneumonia from whom we serially isolated Mycobacterium kyorinense, an organism not previously reported in Australia, or associated with cavitary disease. We discuss the clinical presentation, the isolation of the organism on several specimens and initial management. M. kyorinense is a recently characterized species, which has previously only been described in Japan and Brazil [1]

Phase Ib/II Dose Expansion Study of Lenvatinib Combined with Letrozole in Postmenopausal Women with Hormone Receptor–Positive Breast Cancer

10.1158/1078-0432.CCR-21-4179Clinical Cancer Research28112248-225