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At least 631 records · Page 35Linked to original sources
PubMedDate not supplied

Unerupted second primary molars: report of two cases.

Two cases with an unerupted primary left mandibular second molar are described. second premolar was congenitally missing, in the other the unerupted primary molar was positioned inferiorly and lingually to its permanent successor. Unerupted primary molars should be extracted, but the time of extraction should be defined carefully by taking into consideration the development of the succedaneous premolar and the space relations in the permanent dentition.

Anodontia↗
PubMedDate not supplied

Dental agenesis in hemifacial microsomia.

Hemifacial microsomia (HM) is an asymmetrical congenital deformity of the head and face caused by anomalous development of the structures derived from the first and second branchial arches. This study evaluates the incidence of agenesis and dental inclusions in HM patients. Sixty-three HM patients, 27 male and 36 female, ranging from 7 to 43 years had monolateral (61) and bilateral (2) presentation. From clinical examination, photographs, and various radiographs, the following manifestations were noted: 11 patients had tooth agenesis with at least one on affected side and 5 patients had dental inclusions. The greater the severity of HM, the greater likelihood of agenesis. Third molars were most commonly missing. Dental inclusions did not show a relationship to severity.

Adolescent↗
PubMed1997

An exploratory study combining hospital episode statistics with socio-demographic variables, to examine the access and utilisation of hospital oral surgery services.

OBJECTIVE: To examine the socio-economic background of patients who underwent inpatient and day-case oral operations from 1989-1994 in the West Midlands. DESIGN: Retrospective. SETTING: National Health Services Executive West Midlands; with a population of approximately 5.5 million. SUBJECTS: A total of 4,926,438 hospital inpatient finished consultant episodes, within 56 specialties recorded in the hospital episode statistics database, of which 60,904 (1.24 per cent) were dental; oral surgery. OUTCOME MEASURE: Standardised hospital inpatient activity ratios. RESULTS: The overall levels of activity rose moderately over the five year study period, although the type of activity remained consistent. Surgical removal of teeth was the third most common activity of all surgical procedures. Patients who availed themselves of elective inpatient oral surgery were generally from a higher socio-economic group, in marked contrast to those patients admitted for emergency oral surgery. This observation was highlighted even further by the procedure 'removal of impacted wisdom tooth', which accounted for 41 per cent of all oral surgery activity. The most deprived communities (15 per cent of the regional population) utilised this service 50 per cent less than all other groups. CONCLUSIONS: The application of a deprivation index to hospital episode data enables more accurate assessment of service utilisation by differing socio-economic groups. The inequality of the oral surgery provision to the 15 per cent of the population which were most deprived adds to the overall debate on the appropriateness of this service. Further examination of the pattern of behaviour and referrals amongst primary dental care services is clearly needed.

Adolescent↗
PubMed1997

Surgical management of a labially placed permanent maxillary central incisor after supernumerary tooth extraction: report of a case.

A case of a 12-year old-boy having a chief complaint of labially placed maxillary central incisor is presented. Radiographic evaluation revealed the presence of a supernumerary tooth impeding the eruption of the left permanent central incisor. The mesiodens was surgically removed and the permanent central incisor was positioned and splinted into proper alignment.

Child↗
PubMed1999

The physical characteristics of neodymium iron boron magnets for tooth extrusion.

Impaction and non-eruption of teeth is a common problem encountered in orthodontics and many techniques have been proposed for the management of this condition. It has been advocated that a system utilizing magnets would supply a continuous, directionally sensitive, extrusive force, through closed mucosa and thus provide not only a physiological sound basis for successful treatment, but also reduce the need for patient compliance and appliance adjustment. This ex vivo investigation examined in detail the physical characteristics of neodymium iron boron magnets employed in attraction in order to assess their usefulness in the clinical situation. Attractive force and magnetic flux density measurements were recorded for nine sets of magnet pairs with differing morphologies. The effect of spatial relationship on force was assessed by varying vertical, transverse and horizontal positions of the magnets relative to each other, and by altering the pole face angles. The data obtained suggest that magnets with larger pole face areas and longer magnetic axes provide the best performance with respect to clinical usefulness. It was possible to formulate a specific relationship between force and flux density for each magnet pair. This relationship can be used in the clinical management of unerupted teeth to predict the force between the magnets by measuring the magnetic flux density present at mucosal level. The results indicate that magnetic systems may, indeed, have a place in the treatment of unerupted teeth.

Biomechanical Phenomena↗
PubMed2006

Rapid prototyping as a tool for diagnosis and treatment planning for maxillary canine impaction.

Treating an impacted maxillary canine requires identifying its exact position; this can pose a challenge to both orthodontists and oral surgeons. The purpose of this article is to present a new method for diagnosis and treatment planning of maxillary canine impaction by using computed tomography combined with rapid prototyping. Computed tomography image files of a patient with tooth 13 impaction were edited to produce, by means of rapid prototyping, an anatomic model of the maxillary teeth and a single attachment model that was later used to fabricate a metal attachment to be bonded to the impacted tooth. The dental model was used in the diagnosis and orthodontic treatment planning, and to communicate with the patient and his parents. The model showed the exact anatomical relationship between the impacted tooth and the other teeth; it was the main aid in intraoperative navigation during surgery to expose the tooth. The metal attachment built from the prototype was bonded to tooth 13 during surgery. Prototyping could become a new tool for fabricating brackets and other precision accessories for specific needs. Dental models made with rapid prototyping could become the diagnostic procedure of choice for evaluating impacted maxillary canines.

Adolescent↗