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At least 1,369 records · Page 76Linked to original sources
PubMed2001

Amelogenesis imperfecta: diagnosis and resolution of a case with hypoplasia and hypocalcification of enamel, dental agenesis, and skeletal open bite.

A case of amelogenesis imperfecta with hypoplasia, hypocalcification of the enamel, congenital absence of teeth 12 and 22, delayed eruption of tooth 23, edge-to-edge incisal relationship, open bite, and bilateral posterior cross bite at the level of the first and second premolars is presented. Lateral skull teleradiography indicated a Class III skeletal pattern of maxillary origin associated with a dolichofacial pattern with multiple indicators of facial hyperdivergence. The patient presented a major esthetic abnormality of the face and required orthodontic treatment prior to a prosthetic solution with full-coverage metal-ceramic crowns in both the maxilla and the mandible. The diagnosis of cases such as this one and the therapeutic implications from an orthodontic and prosthetic standpoint are reported.

Adolescent↗
PubMed2002

A comparative study on the intercuspal occlusion among TMD patients, malocclusion patients and university students.

OBJECTIVE: The relationship between occlusion and temporomandibular disorders (TMD) remains disputed. The related epidemiological studies have been carried out focused on the occlusal characteristics in motion, for example in protrusion, retrusion or laterally extension and on some of malocclusion features. Very few studies were carried out on the intercuspal occlusion which is the most important occlusal relationship. Angle's classification of occlusion and the relationship of over-jet and over-bite are two prominent features now generally used in clinical practice for occlusal evaluation. In present study two kinds of features of occlusion were compared among TMD patients, malocclusion patients and university student volunteers, who of the laters represented nature population. METHODS: 100 continued cases visiting our TMD Clinic during the year of 2 000 with complain of TMD problem, 100 malocclusion patients in continued orthodontic department records, and 268 university student volunteers were included. All subjects were with complete dentitions, except of age-related third or second molar tooth eruption difference. Study cast were obtained for all 468 subjects involved and following characters were studied. 1. Angle's classification; 2. Over-jet and over-bite relationship. Anteriorly it included cross-bite, cusp-to cusp bite, deep over-bite (without deep over-jet), deep over-jet (with or without deep-bite), open bite, and others. Posteriorly it included cross-bite, reverse cross-bite and others. 3. Abnormal occlusal index: For the purpose of quantitatively comparing the abnormal occlusal relationship of over-bite and over-jet, the occlusal index was introduced. The anterior continued abnormal was scored as 3 while posterior continued oclcusal abnormal scored as 5. The sum of the scores in the same subject was taken as his abnormal occlusion index. RESULTS: 1. Ratio of Angle's I patients in malocclusion group was significantly lower than those in TMD group and US group (P < 0.05), while the later two groups had no difference (P > 0.05). 2. The ratios of anterior cross-bite and deep over-jet were higher in malocclusion group than those in other two groups. No significant difference for the other kinds of abnormal over-jet and over-bite relationship were found among the three groups. 3. The abnormal occlusion index of malocclusion group was higher than that of US group, but not than that of TMD group which had no difference with US group either. CONCLUSIONS: 1. Aesthetic related anterior abnormal occlusion such as anterior cross-bite and deep-over-jet attract more attention of popular. But they had no relationship with TMD. 2. TMD patients had not significant occlusal features on Angle's classification and over-jet and over-bite relationship compared to malocclusion and nature population subjects.

Dental Occlusion↗
PubMed2002

Orthodontic treatment of palatally impacted maxillary canines.

The aim of this study was to determine the feasibility of treating children with impacted maxillary canines by orthodontic treatment alone. The subjects were 28 children (mean age: 13.5 years, range 11.4-16.1 years) with between them 32 palatally impacted canines. The overlying primary canines were extracted between 0 and 42 months before the start of appliance treatment to open space in the arches for the impacted teeth. No other surgical procedures were carried out prior to the start of appliance treatment. Appliance treatment was deferred for at least six months if an impacted canine was the main reason for treatment, otherwise treatment was commenced according to the needs of the patient. In 94% of the cases, the severity of impaction lessened following extraction of the overlying primary canines and orthodontic treatment. The deepest impactions tended to occur in the oldest children. The majority (75%) of the canines emerged following orthodontic treatment to create space for them in the arch; the remainder were surgically exposed. Appliance treatment tended to take longer in children with the deepest impactions. It is concluded that fixed appliance treatment to create space for a palatally impacted canine is an effective management option for children with impacted maxillary canines.

Adolescent↗
PubMed2002

Prevalence of periodontal pocketing and tooth mobility according to tooth types in Nigerians--a pilot study.

The aim of the present study was to evaluate the occurrence of periodontal pocketing and tooth mobility according to the tooth types in the mouth. There is a paucity of knowledge concerning which tooth types are more prone to periodontal disease from the review of literature. The study sample comprised 255 subjects, age ranged 16 years to 74 years. These subjects were those referred to the Periodontology Clinic of the University College Hospital, Ibadan, Nigeria, for one form of periodontal disease or the other. All the teeth were tested for periodontal pocketing using William's periodontal probe (Astir Intermedica, Kensington, London) and for tooth mobility using the Miller's Mobility Index method. The study showed that prevalence of tooth mobility is in this descending order--lower incisors, upper incisors, upper first molars, upper second molars, lower first and second molar, the premolars and lastly, the canines with the least occurrence on the upper left canines. This order is slightly different for prevalence of periodontal pocketing. The teeth most affected by pocketing were the upper second molars, followed by upper first molars, lower second molars with the least being the canines. It is suggested that exceptional care be given to these most susceptible teeth for periodontal disease in the mouth in order to prevent the development of irreversible damage of the periodontium.

Adolescent↗
PubMedDate not supplied

The distal shoe space maintainer chairside fabrication and clinical performance.

The chairside-fabricated distal shoe appliance, with a stainless steel crown as the retainer, is an efficacious and cost-effective appliance for guiding the unerupted permanent first molar into position after premature loss or extraction of the second primary molar. The fabrication technique is illustrated in this case report and data is presented on the success rate of the appliance.

Child↗
PubMedDate not supplied

Adequacy of mandibular premolar position despite early loss of its deciduous molar.

The mandibular second premolar (MnP2) tooth is one of the most commonly impacted teeth. Early loss of its deciduous predecessor has long been suggested to be a factor in the etiology of the MnP2 impaction. In this study, panoramic roentgenograms were used to measure the angular position of the unerupted MnP2 in 85 children. The study was carried out to test whether early loss of the lower second primary molar (dM2) correlates with MnP2 malpositions that are measurably greater than those from a control sample. The results show a small and statistically insignificant difference between the mean angles in cases with (79.6 degrees) and without (83.2 degrees) dM2. To eliminate individual factors, e.g., genetics, 2 sides of the same patient, with and without dM2, were compared. The group with the missing dM2 on one side showed higher angle differences, compared with the control group. However, the differences were still small (approximately 4 degrees) and statistically insignificant. Our findings do not show a significant influence of early loss of dM2 on the inclination of the unerupted MnP2, suggesting that environmental factors may be of less significance, compared with genetic ones.

Adolescent↗
PubMed2002

[Microcystic lateral parodontal cyst. Report of a case].

The lateral periodontal cyst (LPC) is an odontogenetic lesion of the maxillary bone representing about 0.8% of maxillary cystic lesions. It starts in the lateral periodontal area of a vital erupted tooth. Clinical symptoms are generally absent. Its diagnosis usually can be made on the basis of an occasional radiographic examination which shows an osteolytic monoloculate lesion with defined outlines. The botryoid cyst is a variation of LPC and is radiographically different and more aggressive than the common LPC. A clinical case of LPC which allows to make histopathological and clinical considerations on these cystic lesions is described.

Humans↗
PubMedDate not supplied

Mesiodens: a clinical and radiographic study.

PURPOSE: The term 'mesiodens' refers to a supernumerary tooth present in the midline of the maxilla between the two central incisors. This study seeks to investigate the characteristics of mesiodens among children in Korea. METHODS: The study population consisted of 40 children whose ages ranged from 4 to-26-years. The characteristics of mesiodens were obtained from radiographs and clinical examination results, and were confirmed by surgical intervention. RESULTS: Results showed that males were affected approximately 4 times as frequendy as females. Twenty-five percent of the patients had more than 1 supernumerary tooth. About 66% of the mesiodens were conical in shape and about 52% of the mesiodens were in the upward position. The age and sex distribution, number of mesiodens per patient, shape, direction, size, and effect on permanent maxillary incisors are also presented in this study. CONCLUSIONS: The incidence of mesiodens has been estimated at 0.15% to 1% of the population. It occurs more frequently in boys than in girls, with the ratio being approximately 2:1. In this study, a male:female ratio of 4:1 for the prevalence for mesiodens was found. Ten (25%) out of the 40 patients had 2 mesiodens.

Adolescent↗
PubMed1992

Post-endodontic pericoronitis.

Pericoronitis is defined as inflammation of the soft tissue around the crown of any partially erupted tooth. A case of pericoronitis with an unusual aetiology is described.

Adult↗