How Does Hypodontia Compare in Nonsyndromic Pierre Robin Sequence Versus Isolated Cleft Palate and Isolated Cleft Lip?

OBJECTIVE: To assess the prevalence and patterns of hypodontia in nonsyndromic Pierre Robin sequence (PRS) and compare it with hypodontia in nonsyndromic isolated cleft palates and isolated cleft lips. DESIGN: Retrospective cohort study. SETTING: Alder Hey Children's Hospital, United Kingdom. PATIENTS: Patients with nonsyndromic PRS (group 1), isolated cleft palate (group 2), and isolated cleft lip (group 3). MAIN OUTCOME MEASURES: Hypodontia in the permanent dentition assessed from orthopantomographs. RESULTS: A total of 154 patients were included. Group 1 had the highest incidence of hypodontia with 47% having at least one tooth congenitally absent. Groups 2 and 3 had reduced rates of hypodontia with 27% and 19% of the groups missing teeth, respectively; 93% of cases of hypodontia in group 1 involved the absence of at least one second premolar. Of these patients, there was found to be bilateral agenesis of second premolars in 50% of cases. CONCLUSIONS: Patients with PRS and cleft palates are more likely to have hypodontia than those with isolated cleft palates or unilateral cleft lips. Patients with PRS have more severe hypodontia than those with isolated cleft palates or unilateral cleft lips. Bilateral agenesis of lower second premolars is a commonly seen pattern among patients with PRS. In this large UK study, a similar prevalence and pattern of hypodontia to other nonsyndromic PRS populations worldwide has been demonstrated.

Identifying associations between dental arch relationship scores, relative deprivation and other cleft audit outcomes. Part 1.

OBJECTIVES: To assess whether dental arch relationship scores are associated with speech, audiological and psychology outcomes in patients with complete unilateral cleft lip and palate (UCLP) and bilateral cleft lip and palate (BCLP). SETTING AND SAMPLE POPULATION: One hundred 5-year-old children with non-syndromic complete UCLP and forty-two 5-year-olds with non-syndromic complete BCLP from the United Kingdom. MATERIAL AND METHODS: Data were collected from five-year audit clinics for dental arch relationships, speech, hearing and psychology outcomes. Associations were assessed between ordinal prognostic covariates and the dental arch relationship outcome using a Cochrane-Armitage test for trend and comparisons with binary prognostic covariates using chi-square/Fisher's exact test. This was extended to assess associations between five-year audit outcomes and a measure of deprivation. RESULTS: There was no evidence of associations between dental arch relationships and outcomes for audiology and speech. Individual domain analysis of the psychology outcomes within the UCLP cohort reported a poor outcome for Pro-social score to be associated with a poor 5-year-old index score (P = .018). For the BCLP sample, a good outcome for the BCLP Deciduous Dentition Yardstick was associated with a good conduct score (P = .01). CONCLUSION: There was no association with the 5-year-old index/BCLP Deciduous Dentition Yardstick score and outcomes reported for audiology and speech. For the UCLP and BCLP cohorts, a poor dental arch relationship outcome may be associated with issues with some aspects of psychological well-being, associated with peer interactions and conduct. The deprivation index of samples had no association with the outcomes assessed.

Identifying associations between dental arch relationship scores, relative deprivation and other cleft audit outcomes. Part 2.

Identify associations between dental arch relationship scores, oral health status and deprivation index in patients with complete unilateral cleft lip and palate (UCLP) and bilateral cleft lip and palate (BCLP). Ninety-two 5-year-old children with non-syndromic complete UCLP and thirty-nine 5-year-old children with non-syndromic complete BCLP from the United Kingdom. Data were collected from the 5-year audit outcomes submitted to the Cleft Registry and Audit Network (CRANE). The index of multiple deprivation (IMD) and Welsh index of deprivation were used to assess a relative measure of deprivation. Comparisons of 5-year-old index/BCLP Deciduous Dentition Yardstick outcome against IMD and dmft are performed using multivariable linear regression models. Both UCLP and BCLP had a high percentage of children with dmft >0 (47% and 49%, respectively). The mean dmft for the UCLP cohort was 2.8 and 2.6 for the BCLP cohort. In the UCLP group, a poorer 5-year-old index was associated with an increased dmft score (P = .023) and higher level of deprivation (P = .010). In the BCLP group, there was no significant associations between BCLP Deciduous Dentition Yardstick, dmft and IMD. A poorer dental arch relationship outcome may be associated with higher level of area deprivation and oral health status, in children with UCLP. Those with a poor outcome for the 5-year-old Index are more likely to have increased caries experience.

Multidisciplinary management of a fractured premolar: a case report with followup.

The general dental practitioner must consider orthodontic extrusion of a tooth when a subgingival defect, such as, crown fracture occurs before prosthetic rehabilitation, especially in the aesthetic zone. Extrusion enables the root portion to be elevated which exposes sound tooth structure for placement of restorative margins. This case report describes the multidisciplinary management of a fractured upper first premolar in a general dental practice. The forced orthodontic eruption is achieved by an endodontic attachment and sectional fixed appliance with an offset placed in the wire. The ability to extrude premolars with this method is complicated by heavy occlusal forces, occlusal interferences, and short clinical crown length. The tooth was restored with a titanium post, composite core, and porcelain fused to metal crown. The entire course of treatment was carried out under National Health Scheme, UK and as a part of vocational training. The 21 months followup showed no change in occlusal contacts or gingival level.