Relationship of adaptive expertise of health professions educators with age, experience, academic rank, and their work performance during an altered academic environment.

Background: Health professionals and health professions educators (HPEs) worldwide were confronted by the COVID-19 pandemic, which disrupted standard practice and forced HPEs to develop creative, alternative modes of training and education. The ability of people to work successfully and efficiently in non-standard situations can be called adaptive expertise in which people quickly overcome changes in work requirements using their expert knowledge in novel ways. The objectives of the current study were to investigate how the adaptive expertise of a group of HPEs influenced perceived work performance in a non-standard situation and to see whether there were relationships between the level of adaptive expertise and academic ranking and work experience of HPEs.

Association of learning approaches with academic performance of Sri Lankan first-year dental students.

Background: Primarily deep approach (DA) and surface approach (SA) to learning have been distinguished among students.

Purpose: We aimed to determine the learning approaches and their association with the academic performance of a batch of 1st-year Sri Lankan dental students.

Methods: Learning scores of students were calculated using the revised two-factor study process (R-SPQ-2F) questionnaire and they were correlated with the academic performance of students.

Behavioural risk factors of men associated with transmission of sexually transmitted infections (STIs) in Sri Lanka.

Background: Unprotected sex is a major risk factor for transmission of sexually transmitted infections (STIs). We explored the behavioural risk factors for STIs among men who presented with STI-related symptoms.

Methods: A systematic sample of 112 males presenting with STI symptoms at district sexually transmitted disease (STD) clinic located in Kandy, Sri Lanka were enrolled during 2009.

Age-related changes in crown and root length in Sri Lankan Sinhalese.

Exploration of the relationship between tooth dimensions, body size, and age is important in paleontology, forensic odontology and aesthetic dentistry. It is reasonable to speculate that tooth length is associated with stature since teeth contribute to facial height. This study aimed to determine whether there was an association between tooth length and stature and age in a sample of Sri Lankan Sinhalese.

Nerve-epithelium association in the periodontal ligament of guinea pig teeth.

Several lines of evidence have suggested that periodontal nerves have other roles besides sensory function. Exploring the distribution pattern of nerves in relation to other structures within the periodontal ligament of various species should be important to understand their roles within the ligament. This study investigated whether any association exists between the nerves and the epithelial cells in the periodontal ligament of continuously erupting guinea pig molars, which show distinct enamel epithelium layers among the cementum pearls.

Possible role of dentin matrix in region-specific deposition of cellular and acellular extrinsic fibre cementum.

The mechanism whereby a region-specific deposition of the two types of cementum (cellular cementum and acellular extrinsic fibre cementum) is regulated on the growing root surface was tested using bisphosphonate-affected teeth of young rats and guinea pigs. The animals were injected subcutaneously with 8 or 10 mg P x kg body weight(-1) x day(-1) of 1-hydroxyethylidene-1,1-bisphosphonate (HEBP) for 1 or 2 weeks. In rat molars, HEBP prevented mineralization of newly formed root dentin matrix and totally inhibited de novo deposition of acellular extrinsic fibre cementum.

A unique localization of mechanoreceptors in the periodontal tissue of guinea pig teeth.

This study describes the unique distribution of Ruffini endings (RE) in the periodontal tissues of the guinea pig teeth with special references to their presence in the enamel-related aspects of the continuously growing incisors and molars. In guinea pig incisors, immunohistochemistry for PGP 9.5 and glia specific S-100 protein revealed a condensed distribution of well-developed RE in the bone-related part of the lingual periodontal ligament as has been reported in many other rodents.

On the origin of intrinsic matrix of acellular extrinsic fiber cementum: studies on growing cementum pearls of normal and bisphosphonate-affected guinea pig molars.

Cementum pearls (CPs) belong to a type of acellular extrinsic fiber cementum (AEFC) that form on the maturing enamel of guinea pig molars. This study aimed to elucidate the forming process of intrinsic matrix of AEFC using the CPs of normal and bisphosphonate-affected guinea pig molars as experimental models. A group of guinea pigs were subjected to continuous administration of 1-hydroxyethylidene-1,1-bisphosphonate (HEBP) for 2 wk to inhibit mineralization of growing CPs.