Novel Ameloblastin Variants, Contrasting Amelogenesis Imperfecta Phenotypes.

Amelogenesis imperfecta (AI) comprises a group of rare, inherited disorders with abnormal enamel formation. Ameloblastin (AMBN), the second most abundant enamel matrix protein (EMP), plays a critical role in amelogenesis. Pathogenic biallelic loss-of-function AMBN variants are known to cause recessive hypoplastic AI. A report of a family with dominant hypoplastic AI attributed to AMBN missense change p.Pro357Ser, together with data from animal models, suggests that the consequences of AMBN variants in human AI remain incompletely characterized. Here we describe 5 new pathogenic AMBN variants in 11 individuals with AI. These fall within 3 groups by phenotype. Group 1, consisting of 6 families biallelic for combinations of 4 different variants, have yellow hypoplastic AI with poor-quality enamel, consistent with previous reports. Group 2, with 2 families, appears monoallelic for a variant shared with group 1 and has hypomaturation AI of near-normal enamel volume with pitting. Group 3 includes 3 families, all monoallelic for a fifth variant, which are affected by white hypoplastic AI with a thin intact enamel layer. Three variants, c.209C>G; p.(Ser70*) (groups 1 and 2), c.295T>C; p.(Tyr99His) (group 1), and c.76G>A; p.(Ala26Thr) (group 3) were identified in multiple families. Long-read AMBN locus sequencing revealed these variants are on the same conserved haplotype, implying they originate from a common ancestor. Data presented therefore provide further support for possible dominant as well as recessive inheritance for AMBN-related AI and for multiple contrasting phenotypes. In conclusion, our findings suggest pathogenic AMBN variants have a more complex impact on human AI than previously reported.

Adolescent valuation of CARIES-QC-U: a child-centred preference-based measure of dental caries.

OBJECTIVES: This study develops an adolescent value set for a child-centred dental caries-specific measure of oral health-related quality of life (OHRQoL) based upon CARIES-QC (Caries Impacts and Experiences Questionnaire for Children). This study develops a new approach to valuing child health by eliciting adolescent preferences and anchoring these onto the 1-0 full health-dead QALY (quality adjusted life year) scale using ordinal adult preferences. METHODS: Two online surveys were created to elicit preferences for the CARIES-QC classification system. The first comprised best-worst scaling (BWS) tasks for completion by adolescents aged 11-16 years. The second comprised discrete choice experiment tasks with a duration attribute (DCETTO) for completion by adults aged over 18 years. Preferences were modelled using the conditional logit model. Mapping regressions anchored the adolescent BWS data onto the QALY scale using adult DCETTO values, since the BWS survey data alone cannot generate anchored values. RESULTS: 723 adolescents completed the BWS survey and 626 adults completed the DCETTO survey. The samples were representative of UK adolescent and adult populations. Fully consistent and robust models were produced for both BWS and DCETTO data. BWS preferences were mapped onto DCETTO values, resulting utility estimates for each health state defined by the classification system. CONCLUSION: This is the first measure with predetermined scoring based on preferences to be developed specifically for use in child oral health research, and uses a novel technique to generate a value set using adolescent preferences. The estimates can be used to generate QALYs in economic evaluations of interventions to improve children's oral health.

The impact of dental caries and its treatment under general anaesthetic on children and their families.

OBJECTIVE: To assess the impact of dental caries and treatment under general anaesthetic (GA) on the everyday lives of children and their families, using child-reported measures of quality of life (QoL) and oral health-related quality of life (OHRQoL). METHOD: Participants, aged 5-16 years old having treatment for dental caries under GA, were recruited from new patient clinics at Charles Clifford Dental Hospital, Sheffield. OHRQoL was measured before and 3-months after treatment using the Caries Impacts and Experiences Questionnaire for Children (CARIES-QC). Overall QoL was measured using the Child Health Utility 9D (CHU9D). Parents/caregivers completed the Family Impact Scale (FIS). RESULTS: Eighty five parent-child dyads completed the study. There was statistically significant improvement in OHRQoL (mean interval score difference in CARIES-QC = 4.43, p < 0.001) and QoL (mean score difference in CHU9D = 2.48, p < 0.001) following treatment, with moderate to large effect sizes. There was statistically significant improvement in FIS scores (mean score difference = 5.48, p = 0.03). CONCLUSIONS: Treatment under GA was associated with improvement in QoL and OHRQoL as reported by children, and reduced impacts on the family. This work highlights the importance of GA services in reducing the caries-related impacts experienced by children. Further work is needed investigate the impact of clinical, environmental and individual factors.

What children say and clinicians hear: accounts relating to incisor hypomineralisation of cosmetic concern.

AIM: To explore the range of impacts relating to incisor opacities as described by children, their general dental practitioners and paediatric dentists. METHODS: Participants included 50 children, aged 7-16 years, referred to a UK hospital paediatric dentistry service for management of incisor opacities. All children were subsequently diagnosed with molar incisor hypomineralisation. Following ethical approval, data were recorded as follows: patient demographics, distance travelled, waiting times, nature of any impacts relating to incisor opacities documented in referral letters and/or in subsequent paediatric dentistry assessment records. Additionally, children completed the short form Child Oral Health Impact Profile questionnaire (COHIP-SF19) as a self-report measure of their oral health-related quality of life (OHRQoL). RESULTS: Nearly, half (48%, n = 24) of the referral letters mentioned that the child was experiencing one or more negative social and/or functional impacts. Mean COHIP score was significantly lower (indicating poorer OHRQoL) for children whose referring dentist had identified a negative impact (COHIP = 42.9) compared to those with no documented impact (COHIP = 50.5; p = 0.018, independent t test). At the hospital consultation, negative impacts were elicited by a paediatric dentist in 86% (n = 43) of cases. Again, mean COHIP score was significantly lower for children whose assessment records noted a negative impact (COHIP = 44.5) compared to those with no recorded impact (COHIP = 60.2; p = 0.001). Families travelled a mean distance of 57 km (range 3-218 km) to the hospital service, with an average waiting time of 75 days from referral. CONCLUSION: It is encouraging that dental professionals seem to be aware of the negative psychosocial impacts experienced by some children with enamel opacities, and that children feel able to describe them.

A systematic review of the quality and scope of economic evaluations in child oral health research.

BACKGROUND: Economic evaluations provide policy makers with information to facilitate efficient resource allocation. To date, the quality and scope of economic evaluations in the field of child oral health has not been evaluated. Furthermore, whilst the involvement of children in research has been actively encouraged in recent years, the success of this movement in dental health economics has not yet been explored. This review aimed to determine the quality and scope of published economic evaluations applied to children's oral health and to consider the extent of children's involvement. METHODS: The following databases were searched: CINAHL, Cochrane Library, Econlit, EThOS, MEDLINE, NHS EED, OpenGrey, Scopus, Web of Science. Full economic evaluations, relating to any aspect of child oral health, published after 1997 were included and appraised against the Drummond checklist and the Consolidated Health Economic Evaluation Reporting Standards by a team of four calibrated reviewers. Data were also extracted regarding children's involvement and the outcome measures used. RESULTS: Two thousand seven hundred fifteen studies were identified, of which 46 met the inclusion criteria. The majority (n = 38, 82%) were cost-effectiveness studies, with most focusing on the prevention or management of dental caries (n = 42, 91%). One study quantified outcomes in Quality Adjusted Life Years (QALYs), and one study utilised a child-reported outcome measure. The mean percentage of applicable Drummond checklist criteria met by the studies in this review was 48% (median = 50%, range = 0-100%) with key methodological weaknesses noted in relation to discounting of costs and outcomes. The mean percentage of applicable CHEERS criteria met by each study was 77% (median = 83%, range = 33-100%), with limited reporting of conflicts of interest. Children's engagement was largely overlooked. CONCLUSIONS: There is a paucity of high-quality economic evaluations in the field of child oral health. This deficiency could be addressed through the endorsement of standardised economic evaluation guidelines by dental journals. The development of a child-centred utility measure for use in paediatric oral health would enable researchers to quantify outcomes in terms of quality adjusted life years (QALYs) whilst promoting child-centred research.

Children's experiences following a CBT intervention to reduce dental anxiety: one year on.

Objective: To investigate children's ongoing experiences of dental care and use of strategies to manage their dental anxiety following cognitive behavioural therapy (CBT). Design: A child self-completed postal questionnaire. Settings: Hospital, community and general dental practice. Subjects: Questionnaires were sent to 44 children, aged 10­17 years who had been referred to specialist services due to their dental anxiety. Intervention: Children had all previously received a guided CBT self-help intervention to reduce their dental anxiety and, on completion of treatment, had been discharged to their referring dentist. Questionnaires were sent out 12­18 months later to ascertain dental attendance patterns and application of any strategies learnt from the previous CBT intervention. Results: 22 responses (50%) were received from 16 girls and six boys. Eighty-two percent had subsequently accessed follow-up care with a general dental practitioner and over half of these had undergone a dental procedure, other than a check-up. Ninety-one percent reported feeling less worried about dental visits, than previously, and described a change in cognition, behaviours, and feelings that allowed them to manage their anxiety better. Conclusions: CBT has positive immediate and longitudinal effects in reducing children's dental anxiety. The challenge of adopting this evidence-based approach within primary care settings remains.

Development and Testing of a Cognitive Behavioral Therapy Resource for Children's Dental Anxiety.

Cognitive Behavioral Therapy (CBT) is an evidence-based treatment for dental anxiety; however, access to therapy is limited. The current study aimed to develop a self-help CBT resource for reducing dental anxiety in children, and to assess the feasibility of conducting a trial to evaluate the treatment efficacy and cost-effectiveness of such an intervention. A mixed methods design was employed. Within phase 1, a qualitative "person-based" approach informed the development of the self-help CBT resource. This also employed guidelines for the development and evaluation of complex interventions. Within phase 2, children, aged between 9 and 16 y, who had elevated self-reported dental anxiety and were attending a community dental service or dental hospital, were invited to use the CBT resource. Children completed questionnaires, which assessed their dental anxiety and health-related quality of life (HRQoL) prior to and following their use of the resource. Recruitment and completion rates were recorded. Acceptability of the CBT resource was explored using interviews and focus groups with children, parents/carers and dental professionals. For this analysis, the authors adhered to the Mixed Methods Appraisal Tool criteria. There were 24 families and 25 dental professionals participating in the development and qualitative evaluation of the CBT resource for children with dental anxiety. A total of 56 children agreed to trial the CBT resource (66% response rate) and 48 of these children completed the study (86% completion rate). There was a significant reduction in dental anxiety (mean score difference = 7.7, t = 7.9, df = 45, P < 0.001, Cohen's d ES = 1.2) and an increase in HRQoL following the use of the CBT resource (mean score difference = -0.03, t = 2.14, df = 46, P < 0.05, Cohen's d ES = 0.3). The self-help approach had high levels of acceptability to stakeholders. These findings provide preliminary evidence for the effectiveness and acceptability of the resource in reducing dental anxiety in children and support the further evaluation of this approach in a randomized control trial. Knowledge Transfer Statement: This study details the development of a guided self-help Cognitive Behavioral Therapy resource for the management of dental anxiety in children and provides preliminary evidence for the feasibility and acceptability of this approach with children aged between 9 and 16 y. The results of this study will inform the design of a definitive trial to examine the treatment- and cost-effectiveness of the resource for reducing dental anxiety in children.

Who attends a Children's Hospital Emergency Department for dental reasons? A two-step cluster analysis approach.

OBJECTIVES: Emergency departments (EDs) have been identified as key providers of dental care although few studies have examined patterns of attendance or clusters of characteristics. The aim was to identify the reasons for visits to an ED, whether these remained stable over time, and characterize clusters of patients by socio-demographic and attendance variables. METHODS: Pseudonymized data were obtained for children who attended the ED in 2003-2004, 2004-2005 and 2012-2013. Presenting complaint was categorized as attending for dental or nondental reasons. Other variables analysed included patient (age, sex, ethnicity and deprivation) and attendance characteristics (distance travelled, season, nature of complaint, time elapsed since onset of symptoms, day of week and hours of attendance), together with treatment outcome (advice, antibiotics and referral). To assess trends over time, analyses were conducted on patient, attendance and treatment outcome variables. To examine whether patients could be characterized by socio-demographic and attendance variables, a two-step cluster analysis was undertaken on 2003-2004 data set and validated on 2004-2005 and 2012-2013 data sets. RESULTS: In 2003-2004, 550 children attended the ED for dental reasons rising to 687 in 2012-2013. The most important predictors of dental attendance were as follows: nature of complaint, ethnicity, time elapsed, sex and deprivation of the area in which children lived. The analysis showed two clusters: cluster 1 was comprised of children who attended the ED for dental injury, were of White ethnicity and attended within 24 h of onset of symptoms. Children in this cluster were likely to be from the least or less deprived areas (compared to Cluster 2) and were more likely to be males. Cluster 2 comprised of children attending the ED for caries, oral mucosal lesions or other complaints, were likely to be of other (non-White) ethnicities and were likely to attend more than 24 h after symptoms began. Children in this cluster were more likely to come from the most deprived areas and were both males and females. The clusters varied according to treatment outcome; those patients in Cluster 2 were more likely to be prescribed medication, whilst those children in Cluster 1 were more likely to be referred to another specialty. CONCLUSIONS: A significant number of visits to the ED were for dental reasons with two clusters of children. The results have identified groups of patients for whom appropriate dental provision is lacking and where targeted services are needed to improve outcomes for children and reduce the burden on EDs.

Unusual extrinsic staining following microabrasion in a girl with amelogenesis imperfecta.

BACKGROUND: Developmental defects of enamel (DDE), such as amelogenesis imperfecta (AI), may present with tooth discolouration that is of aesthetic concern to the affected individual. Children and young people with DDE may therefore seek dental interventions to improve their dental appearance. The most commonly employed approaches include microabrasion, bleaching and/or placement of composite resin veneers. CASE REPORT: A 13-year-old girl with hypomature AI requested treatment for the 'marks' on her teeth which were having a negative impact on her social interactions. Clinical examination revealed generalised dense white opacities, and a microabrasion approach was performed on 11, 12 and 13 using a commercial preparation of 6.6 % hydrochloric acid. Concerningly, the girl's father phoned the next day reporting that his daughter's teeth had turned 'orange'. An urgent review revealed that the treated teeth had indeed become an orange colour. Further enquiry found that the patient had eaten a tomato pizza immediately after her dental treatment and this was believed to have caused the severe extrinsic staining. The patient was provided with a 16 % carbamide peroxide preparation for night-time use in a laboratory-made tray. A 2-week review revealed complete resolution of the staining. FOLLOW-UP: Direct composite resin restorations were subsequently provided for the girl's maxillary anterior teeth to achieve an optimal cosmetic result and she has remained pleased with her dental appearance. CONCLUSION: Clinicians should be aware of the potential for extrinsic staining following microabrasion or tooth bleaching. Patients should be advised against consuming coloured food and drink for at least 48 h after their treatment.

'I felt weird and wobbly.' Child-reported impacts associated with a dental general anaesthetic.

AIM: This qualitative study sought to obtain children's accounts of having dental extractions under general anaesthesia (GA). The aim was to gain greater understanding of the physical and psychological impacts from a child's perspective. METHOD: Ten children, aged 6-11 years, maintained a video diary to document their feelings and experiences before, and following their hospital admission. Two semi-structured home interviews supplemented the video diary data and analysis was guided by narrative approaches. RESULTS: This research revealed new insights into children's experiences of having teeth removed under GA. Several of the post-operative impacts correlated with those previously reported by parents/carers. These were notably nausea, bleeding and tiredness, although children used different terminology. However, additional physical and psychological outcomes, both positive and negative, emerged from the children's narratives. Negative aspects included hunger, disturbed eating, being scared/worried and experiencing discomfort from the IV cannula. Interestingly, pain was not a strong theme. Positive outcomes were also reported, such as satisfaction with the resolution of their dental problem and receipt of rewards and attention from family members. CONCLUSION: These accounts have implications for improving patient experiences and outcomes throughout the dental GA care pathway. A review of pre-operative fasting protocols should be a priority.

Undergraduates' self-reported clinical experience, confidence and perspectives of hospital and outreach paediatric dentistry: a three-year multi-centre evaluation.

A variety of educational approaches exist within U.K. dental schools, and institutions are constantly striving to improve the quality of their graduates. This study aimed to evaluate the self-reported confidence in, and clinical exposure to, paediatric dentistry at three U.K. dental schools (Liverpool, Manchester and Sheffield) over a three year period. Seventy-five percent of final year BDS undergraduates at the three dental schools completed an anonymous questionnaire capturing student self-reported clinical experience in seven core paediatric dentistry treatment skills, both in hospital and outreach settings. Visual analogue scales were used to record self-assessed confidence levels in aspects of paediatric dentistry and students were also asked to provide a written reflection of both their hospital and outreach placements. The results revealed that despite the variety of educational approaches taken, undergraduates reported very similar levels of clinical experience and confidence. Significant interschool differences in student experience were found with respect to the management of carious primary molars, believed to be a result of individual schools favouring different treatment regimes. Although outreach placements were seen as essential for gaining adequate student experience, the need to improve the consistency of teaching between hospital and outreach centres was highlighted. The study also emphasises the need to take care when using clinical targets in undergraduate teaching and identifies the potential benefits of undergraduate training in inhalation sedation. Finally, despite changes to the paediatric programmes with respect to dental trauma management, students remained lacking in confidence suggesting the need for further development.

Video diaries to capture children's participation in the dental GA pathway.

AIM: To explore children's experiences of having teeth extracted under general anaesthetic, with a focus on opportunities to participate in their care pathway. STUDY DESIGN: Qualitative study where analysis was informed by a narrative approach. METHODS: Ten fit and healthy children, aged 6-11 years, who required multiple dental extractions under general anaesthesia at a UK Children's Hospital, participated in the study. Participants were invited to keep a video diary of their thoughts and experiences leading up to, and following, their hospital admission. Data collection was supported by two semi-structured home interviews. RESULTS: Three themes emerged relating to participation: (i) children's prior knowledge and expectations of the dental general anaesthetic (DGA); (ii) their role in decision-making about the DGA and (iii) opportunities identified by children to actively participate in their care pathway. Children's feedback suggested that they did not feel fully informed or involved in decisions about the procedure and were upset about not being able to keep their extracted teeth. CONCLUSIONS: Child-centred resources and decision-aids may be helpful in providing greater opportunities for children to participate in their DGA pathway. However, considerable challenges lie in engaging children without increasing pre-DGA anxiety or conflicting with parents' views about what is best for their child.

Impact of the Hall technique for preformed metal crown placement on undergraduate paediatric dentistry experience.

The Hall technique, a novel method of placing preformed metal crowns (PMCs) without local anaesthesia or tooth preparation, was introduced to our undergraduate dental curriculum in 2009. This study aimed to describe student experience of, and attitudes towards, PMCs before and after exposure to this new technique. Clinical data were extracted from student logbooks to determine the number of PMCs placed for cohorts graduating in 2005 (n = 55), 2009 (n = 61) and 2010 (n = 75). Five focus groups were also conducted with 29 final-year dental students. Students graduating in 2005, 2009 and 2010 had placed a mean (range) of 0.03 (0-1), 0.63 (0-5) and 1.15 (0-9) PMCs, respectively. The proportion of students who had placed a PMC increased significantly from only 1.9% in 2005 to 75% in 2010 (P < 0.05, ANOVA). Students reported some positive experiences of the Hall technique. However, concern over perceived lack of future clinical support, an anticipated increase in time and financial pressures, and the ease of use of glass-ionomer cement as an alternative were described as potential barriers to PMC use. Findings suggest that the introduction of the Hall technique has had a marked impact on the use of PMCs as a treatment modality for carious primary teeth.

Caring for children: little teeth, big challenges.

Dental care for young children with carious primary teeth may pose a number of challenges in terms of assessment and diagnosis, behaviour management and treatment planning. These challenges, together with some misconceptions about the value of restoring the primary dentition, have led to a reduction in the proportion of restorations provided for young children in primary care settings. The aim of my presentation at the forthcoming BDA conference is to provide an overview of current practices for caries management in young children. It will particularly focus on restorative interventions, including preformed metal crowns (using the Hall technique), and will consider the evidence-base for a variety of restorative options. In addition, the child's perspective of restorative care will be considered.

Psychosocial predictors of children's oral health-related quality of life during transition to secondary school.

PURPOSE: Dental conditions have the potential to impact negatively on children's oral health-related quality of life (OHRQoL). However, little attempt has been made to investigate how psychosocial variables and significant life events affect children's OHRQoL. This research aimed to explore how children's dental status, coping, and self-esteem influenced OHRQoL during transition to secondary school. METHODS: All patients were undergoing treatment at a UK Dental Hospital. Self-report questionnaires obtained psychosocial data on self-esteem, coping styles and OHRQoL and were completed by children 3 months prior to secondary school entry and 3 months following educational transition. Data were extracted from the clinical records of the paediatric patients who agreed to participate in the research. RESULTS: A total of 92 children aged between 10 and 11 years participated at baseline (43% response rate) and 71 of these children participated in the follow-up investigation (77% response rate). Multiple lagged regression analyses revealed that clinical variables and children's self-perception of their physical appearance were significant predictors of OHRQoL following transition to secondary school. CONCLUSIONS: Children who were satisfied with their physical appearance reported fewer impacts on their OHRQoL. The mechanisms through which this domain of self-esteem impacts on OHRQoL warrants further investigation.

Oral health-related quality of life of children in relation to dental appearance and educational transition.

BACKGROUND: A variety of inherited and acquired conditions affect the dentition. The aim of this research was to investigate the oral health-related quality of life (OHRQoL) of children in relation to the status of their permanent incisors, at a significant transitional stage in their childhood. METHOD: Two hundred and sixteen patients of the Charles Clifford Dental Hospital, Sheffield, aged between 10 and 11 years, were sent an OHRQoL questionnaire (CPQ11₋14) three months before secondary school entry. Participants were categorised, according to clinical status, as having a visible dental difference (abnormal incisor aesthetics and/or orthodontic malocclusion) or no visible difference. Follow-up questionnaires were issued three months after secondary school entry to obtain repeat psychosocial data. Analysis of variance tests investigated the impact of clinical variables, self-reported satisfaction with dental appearance and gender on OHRQoL during educational transition. RESULTS: Ninety-two children participated in the baseline study and 71 of these children completed the follow-up questionnaire (43% and 77% response rates, respectively). Visible dental differences and dissatisfaction with dental appearance were associated with worse OHRQoL at baseline and follow-up. CONCLUSIONS: Dental conditions which result in visible incisor differences are associated with higher levels of dissatisfaction with appearance and have potential to negatively impact on children's OHRQoL.

The success of fissure sealants placed by dentists and dental care professionals.

OBJECTIVE: To obtain preliminary data on the effectiveness of fissure sealants placed by dentists and dental care professionals (DCPs). RESEARCH DESIGN: Case-note review of fissure sealants provided for paediatric patients within primary dental services in South Yorkshire. PARTICIPANTS: Records were retrieved for 1,100 fissure sealants, placed on first and second permanent molars of 312 children by 25 participating dentists and 25 DCPs during 2001-2003. MAIN OUTCOME MEASURES: Independent variables included operator details and patient-related factors including: caries experience at baseline, age, gender, and socio-economic status. The outcome variables were sealant retention and progression to caries at three years. Bivariate analyses were used to explore the role of potential factors associated with the success of fissure sealant survival. Kaplan-Meier survival analysis and Cox's regression models were used to estimate the probability of sealant success for both operator groups. RESULTS: Retention rates at three years for fissure sealants placed by dentists and DCPs were 62.4% (SD = 22.1) and 58.1% (SD = 21.5) respectively. After three years, 87.1% (SD = 9.8) and 84.2% (SD = 11.6) of teeth sealed by dentists and DCPs remained sound. Exploratory analysis found no significant difference in sealant retention or caries transformation rates according to operator type. CONCLUSIONS: On the basis of these preliminary findings, delegation of fissure sealants to DCPs would seem to be justified in view of the comparable sealant success rates achieved by dentists and DCPs. These data can now be used to inform future randomised controlled trials on the effectiveness of fissure sealants by different operator groups.

Seeking children's perspectives in the management of visible enamel defects.

AIM: To undertake a child-centred evaluation of treatment provision for visible enamel defects. DESIGN: Postal questionnaires, developed with children, were sent to 88 patients, aged 7-16 years, with visible enamel defects of permanent incisors and who had received microabrasion, with/without additional composite restoration at Sheffield Dental Hospital, UK. The questionnaires sought children's perceptions about their teeth before and after the intervention, as well as their evaluation of how they had been treated. Anonymised responses were graded using a 10 cm visual analogue scale (VAS) where a score of 10 indicated the most negative response, and zero the most positive response. RESULTS: Sixty three questionnaires were returned (72% response). Prior to treatment, children reported high levels of worry (VAS=6.8), embarrassment (VAS=6.9) and a perception that their teeth looked yellow and discoloured (VAS=7.3). Following treatment, children thought their teeth looked much better (VAS=1.6), felt happier (VAS=2.2) and more confident (VAS=1.6). They also felt very positive about their clinical experiences, rating the staff as extremely friendly and kind (VAS=0.4) and reporting that procedures were clearly explained (VAS=0.6). CONCLUSIONS: Simple non-invasive dental treatment can have a positive effect on appearance-related satisfaction. The use of child-centred approaches offers an invaluable insight into patient perspectives.

Child and parental acceptance of preformed metal crowns.

AIM: To assess child and parent acceptance of preformed metal crowns (PMCs). STUDY DESIGN: This was a service evaluation using a child- and parent-centred self-report questionnaire in a convenience sample of hospital patients. METHODS: Questionnaires were developed with serviceusers and issued to 98 children who had received a PMC on a primary molar within the paediatric dentistry clinic, Sheffield Dental Hospital, UK. Children used a pictorial Likert scale to rate their treatment experience and views on PMCs. Parents were also asked to complete a 5-item questionnaire, to explore their attitudes towards the PMC and how they felt their child had coped with treatment. Both children and parents were invited to comment in a free-text box on any other issues relating to PMCs. Clinical data were extrapolated from the child's dental records as follows: child's age and gender; status of clinician who had placed the PMC (staff or student), and technique for PMC placement (Hall technique or conventional). RESULTS: 62 questionnaires were completed (63% response rate). The mean age of the child participants was 6.6 years (SD±1.51; range=3.8-10.3), and 65% (n=40) were male. Most children found the clinical procedure acceptable with 54.8% (n=34) reporting it was 'really easy', with no significant differences according to placement technique, or the experience level of the operator (P<0.05, chi-squared test). Only 4.8% (n=3) of parents expressed strong objections to the appearance. Both children and parents felt the clinical rationale had been fully explained to them (88.7%, n=55 and 100%, n=62 respectively). Themes commonly identified from the children's accounts related to specialness, function and recollections of the treatment, with the perception that PMCs were valued for being different. CONCLUSIONS: This study revealed that PMCs were mainly viewed favourably by children and their parents. Clinicians who have been reluctant to use this restorative approach may be encouraged by these findings. However, communication and clinical expertise are paramount in ensuring children and parents have positive treatment experiences and attitudes towards PMCs.