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PubMedDate not supplied

Effect of premature loss of deciduous canines and molars on malocclusion of the permanent dentition.

The effect of the premature loss of deciduous canines and first and second molars on malocclusion of the permanent dentition was studied in 255 schoolchildren 11 years of age or older at the most recent examination of the permanent dentition. Malocclusion was evaluated by scoring malalignment (major and minor) and measurement of crowding in the anterior teeth. Children who had a premature loss of one or more canines or molars had a higher frequency of receiving orthodontic treatment of one type or another for the permanent dentition. The likelihood of need of treatment increased with the number of prematurely lost teeth. Children who had lost one or more deciduous teeth through age 9 had a greater than threefold increase in the frequency of orthodontic treatment relative to the control. Of those who did not receive orthodontic treatment, there was no detectable relationship of the premature loss of canines with the malalignment of permanent teeth. However, there was a significant effect of the premature extraction of molars on malalignment especially major malalignment of permanent teeth. No differences were noted in their effects between the first and second deciduous molars. Crowding of the anterior teeth was directly affected by the premature loss of deciduous canines.

Adolescent↗
PubMed1983

Storage of experimentally avulsed teeth in milk prior to replantation.

Extracted monkey teeth were endodontically treated, stored in milk or saliva for two or six h, and then replanted. Periodontal conditions were evaluated after eight wk. Teeth that had been stored for two or six h in milk or for two h in saliva showed periodontal healing almost as good as that of immediately replanted teeth. Teeth that had been kept in saliva for six h or bench-dried for one h showed extensive replacement resorption. Milk may thus be recommended as a storage medium for ex-articulated teeth prior to replantation in cases when immediate replantation is not possible.

Animals↗
PubMed1984

Larval vs. adult pharyngeal dentition in some Japanese cyprinid fishes.

The development of the pharyngeal dentition was examined in 13 species of five subfamilies of the family Cyprinidae. A previously described difference between the larval and adult dentition in Gnathopogon caerulescens was observed in 11 species of Gobioinae, Cyprininae, Leuciscinae, and Danioinae, but was not seen in two species of Acheilognathinae. The adult dentition is usually complete by the later larval or juvenile period. In the adult dentition, the functioning teeth are generally shed at each position, when the replacement tooth has been ankylosed to the bone, or when the germ of that tooth has grown sufficiently. In the larval dentition, however, the replacement tooth is ankylosed medial to the functioning tooth, so the older functioning tooth is retained after ankylosis of the replacement tooth. That is why the dentigerous surface of the bone grows rapidly during the larval period. Each tooth row represents a single replacement wave. The distribution and pattern of the central teeth are exactly the same in all types of the larval dentition. However, those of the anterior teeth vary between and within different species. The larval dentition develops into the major row of the adult dentition through tooth replacements. The number of tooth families in the larval dentition is completely consistent with the tooth number of the major row in the adult dentition. Therefore, the number of major row teeth owes its variation to that in the appearance pattern of the anterior teeth.

Animals↗
PubMed1990

Cellular roles in physiological root resorption of deciduous teeth in the cat.

This study has attempted to assess the importance of mesenchymal cells, fibroblasts, cementoblasts, and mononuclear phagocytes (i.e., macrophages) in physiological root resorption of feline deciduous teeth. Deciduous incisors of three- to six-month-old kittens undergoing root resorption were investigated by means of electron microscopy. In an early phase of root resorption, the resorption organ consisted of many fibroblasts and relatively few macrophages and odontoclasts, the last with a wide, clear zone and narrow, immature, ruffled border. In the active phase of root resorption, the resorption organ contained many odontoclasts with a well-developed ruffled border and a reduced clear zone, cementoblasts, fibroblasts, macrophages, neutrophils, and many blood vessels. Cementoblasts were present usually on the resorbing dentin surface adjacent to odontoclasts and, in many cases, these cells communicated with each other via gap junctions. Cementoblasts frequently extended broad cell processes with secretion granules and with phagosomes containing collagen fibrils into the dentinal tubules exposed to resorption lacunae. Some macrophages exhibiting a clear zone-like structure also appeared on resorbing dentin surfaces. In the resting phase of root resorption, the dentin surface was covered mostly with cementoblasts resembling bone lining cells. There was an occasional macrophage, but no odontoclasts were observed during this phase. During removal of the periodontal ligament concomitant with root resorption, many fibroblasts phagocytosed mature collagen fibrils, as well as amorphous fluffy material. These results suggest that these mesenchymal cells, as well as odontoclasts, are essential for the cellular removal of dental hard and soft tissues during shedding of feline deciduous teeth.

Animals↗
PubMed2006

Pyle's disease: an incidental finding in a routine dental patient.

Pyle's disease (PD) or metaphyseal dysplasia is an extremely rare genetic disorder, transmitted as an autosomal recessive trait. The peculiarity of the disease is that the striking radiographic manifestations contrast with the relatively normal clinical features. The oral findings and radiographic features of the disease are not well documented. The present paper describes the radiographic features of Pyle's disease in a 17-year-old girl and draws attention to the findings in the jaw bones.

Adolescent↗
PubMed2000

Management of the impacted or displaced maxillary canine.

The maxillary canine is commonly displaced or impacted. Monitoring the normal development of the dentition is important to identify and treat potential problems and hence minimise the need for later, more complex therapy. This paper discusses some problems that may occur and the subsequent treatment of these problems, by illustration with five case reports.

Adolescent↗
PubMed2002

Outcomes associated with restored and unrestored deciduous molar teeth.

INTRODUCTION: Most dental treatment for children in the United Kingdom (UK) is provided by general dental practitioners (GDPs) working in the National Health Service (NHS). A working party of the British Society of Paediatric Dentistry, in a special publication from the Dental Practice Board, has suggested that failure to provide restorative care for the deciduous dentition is unacceptable, yet GDPs are filling fewer teeth in young children. The study aimed to evaluate the health outcomes obtained from restoring carious deciduous molar teeth. METHOD: The dental records of 677 children cared for by 50 GDPs in the north west of England were analysed. RESULTS: The results showed that 18.8% of deciduous molars with unrestored caries and 17.0% with a history of restorative care went on to be extracted because of pain or sepsis. CONCLUSION: The results suggest that the risk of carious deciduous molars being extracted is similar whether these teeth receive restorative care or not.

Dental Caries↗
PubMed1978

The missing orthodontic elastic band, a periodontic-orthodontic dilemma.

A review of the literature and a case report are presented, documenting and illustrating the effect that gingivally retained orthodontic elastic bands have on the periodontal tissues. Until a harmless radiopaque medium can be safely incorporated into elastic bands, extreme caution in their use should be observed. Not only should all attempts be made to anchor the elastic bands to the clinical crown, but the patient should receive thorough instructions in their placement and removal. The dentist should include frequent examinations as part of his treatment regimen.

Adult↗
PubMed1996

Timing of exchange of the maxillary deciduous and permanent teeth in boys with three types of orofacial clefts.

Timing of exchange of the deciduous and permanent maxillary teeth was investigated using dental plaster casts of 163 boys with total unilateral cleft (UCLP), 82 boys with bilateral cleft (BCLP), and 97 boys with isolated cleft palate (CP). All patients were treated at the Prague Plastic Surgery Clinic. The results were compared with a control group of 294 schoolboys. To evaluate the course of eruption, the proportion of each erupted teeth in each year of age was employed. In boys with UCLP, eruption of the permanent maxillary lateral incisors and the permanent maxillary second molar was retarded on the cleft side. On the non-affected side, no delay of eruption was observed, but earlier eruption was found in the permanent maxillary canine and in the permanent maxillary first and second premolars. In boys with BCLP, the highest retardation of eruption was found in the permanent maxillary lateral incisor and in the permanent maxillary first molar. The permanent maxillary canine and both permanent maxillary premolars erupted earlier than in the control group. In boys with CP, only the permanent maxillary central incisors erupted earlier. The maxillary deciduous canines and the second molars were both lost early. We conclude that the developmental disturbances of the maxillary jaw and teeth in patients with orofacial clefts are also associated with alteration of timing of dental exchange.

Adolescent↗
PubMed2001

Hyper-IgE syndrome: a case report.

The hyper-IgE syndrome (HIES) is a rare disorder characterized by pruritic dermatitis, recurrent Staphylococcus skin abscesses and extremely elevated levels of IgE in serum. In this report, an eleven-year-old-boy with hyper-IgE syndrome is presented. He had a coarse facial appearance, pruritic dermatitis, recurrent skin abscesses, pulmonary infection, a reduced rate of resorption of the roots of primary teeth and an elevated serum IgE concentration. The colonization of Candida albicans, Kiebsiella pneumoniae, Escherichia coli and Staphylococcus aureus were found as; (1x10(2) CFU), (2.2x10(4) CFU), (2.2x10(4) CFU) and (2.6x10(3) CFU) per ml saliva, respectively. Also the pulp of a deciduous molar was investigated with light and transmission electron microscope (TEM). As conclusion, treatment for this condition is lifelong administration of therapeutic doses of a penicillinase-resistant penicillin, with the addition of other antibiotics or anti-fungal agents as required for specific infections.

Child↗
PubMed1978

A long-term survey of tooth loss in 600 treated periodontal patients.

1. Six hundred patients in a private periodontal practice were reexamined an average of 22 years after their active treatment and the patterns of tooth loss were observed. 2. During the post-treatment period, 300 patients had lost no teeth from periodontal disease, 199 had lost one to three teeth, 76 had lost 4 to 9 teeth and 25 had lost 10 to 23 teeth. 3. Of 2,139 teeth that originally had been considered of questionable prognosis, 666 were lost. Of these, 394 were lost by one sixth of the patients and only 272 by the other five-sixths. 4. Of 1,464 teeth which originally had furcation involvements, 460 were lost, 240 of them by one-sixth of the patients who deteriorated most. 5. The mortality of teeth which were treated with periodontal surgery was compared with that of teeth which did not have surgery. Tooth retention seemed more closely related to the case type than the surgery performed. 6. In general, periodontal disease is bilaterally symmetrical and there is a predictable order of likelihood of tooth loss according to position in the arch.

Adult↗
PubMed1978

A long term study of root retention in the treatment of maxillary molars with furcation involvement.

A study was done to evaluate long-term results of treating 387 maxillary molars with furcation involvement in 100 patients with chronic destructive periodontal disease. Results showed a favorable long term functional survival rate of 341 teeth (88%) 5 to 24 years after treatment, despite the fact that many teeth had at least one root with 50% or less of bone support before treatment. Of the 46 teeth (12%) that were ultimately extracted, 25 were present for a significant length of time (6 to 18 years) before extraction. The radiographs of 292 teeth (75%) showed no significant change in bone support 5 to 24 years after treatement, while those of 8 teeth (2%) suggested improvement. There was perceptible increase in bone loss in 41 teeth (11%). Forty-six (12 %) were extracted. All periodontally involved teeth in each patient of the study were treated. Specific treatment for maxillary molars with furaction involvement included soft tissue therapy; coronal reshaping, if indicated; and instruction in home care. Considerable emphasis was placed on improving occlusal function. In no case was root amputation, hemisection, osseous surgery, or reshaping of the cervical area of the tooth done. A total of 366 (94%) of the teeth did not have endodontic therapy before, during, or after the study. Therefore endodontic therapy was not a significant factor in retention of the 341 teeth.

Adult↗
PubMed1979

Untreated periodontal disease: a longitudinal study.

Thirty diagnosed but untreated patients with moderate to advanced periodontal disease were examined a minimum of two times. The examination time intervals ranged between 18 and 115 months. 2. A total of 83 teeth were lost between examinations. 3. Excluding a patient who lost 25 teeth, a total of 58 teeth were lost. The adjusted tooth loss was 0.61 tooth per patient per year (or 0.36 with the elimination of 22 "hopeless" teeth). 4. The mandibular and maxillary molars had the greatest percentage of tooth loss between examinations. 5. All 29 patients completing the study had progessive increases in pocket depth during their time in the study. Increases in the mean annual pocket depths per tooth per patient varied from 0.24 millimeter per year to 2.46 millimeters per year. 6. The disto-lingual and mesio-lingual interproximal surfaces had the greatest increases in surface pocket depths. The lingual and buccal surfaces had the smallest increases in pocket depth. 7. The rate of increase in pocket depths was less in patients over 44 years of age. 8. The teeth which were lost had greater initial pocket depths and mobility scores than those which were present at both examinations. 9. There was no correlation between increases in pocket depth and changes in mobility. 10. All 29 patients showed radiographic evidence of progressive bone resorption between examinations. The posterior segments of the mouth had the largest amounts of bone loss between the first and last examinations.

Adult↗