Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Tooth Loss”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 955 records · Page 53Linked to original sources
PubMed1986

Autotransplantation of cryopreserved tooth in connection with orthodontic treatment.

In orthodontic treatment of certain cases of tooth loss, aplasia, or ectopia, autotransplantation is sometimes a valid treatment alternative and often provides an improved result, compared to conventional orthodontic treatment, if an appropriate donor tooth is available and the anatomic circumstances permit it. However, in some cases autotransplantation is not immediately possible as a one-step procedure. In such cases cryopreservation provides a clinically useful technique when an extraoral storage period of months or years is needed to orthodontically prepare the recipient region. In the present case a mature upper first left premolar was stored for 18 months. During this period sufficient space was achieved in the contralateral recipient region between the upper left first and second premolars. The thawed graft was autotransplanted to this position. Endodontic treatment was initiated 4 weeks after transplantation. Four years after transplantation, the periodontal healing of the grafted tooth appeared clinically and radiographically normal without any signs of root resorption. The presented case demonstrates the capacity of a cryopreserved tooth to regenerate what seems to be a normal periodontium after transplantation. If these findings are confirmed in further clinical trials, the technique could be a valuable tool in future orthodontic treatment planning.

Adult↗
PubMed1983

Longitudinal radiographical study on the rate of alveolar bone loss in patients of a dental school.

Two sets of radiographs, taken at an interval of 4-14 years in 105 patients of a dental school, were examined in order to determine the rate of resorption of alveolar bone. The percentage loss of maximum alveolar bone height was measured in the interproximal and interradicular sites by means of the Schei ruler. The average percentage of interproximal bone resorption was 0.51% (0.07 mm) per year. Age, sex, professional status, type of periodontal treatment and general state of health did not seem to affect the annual resorption rate. However, crowned teeth had a significantly greater rate of resorption than uncrowned teeth. Loss of bone tended to be more rapid in interdental as compared to interradicular areas. A positive and statistically significant correlation was found between initial resorption and annual tooth loss.

Adolescent↗
PubMed2002

Tissue engineering of complex tooth structures on biodegradable polymer scaffolds.

Tooth loss due to periodontal disease, dental caries, trauma, or a variety of genetic disorders continues to affect most adults adversely at some time in their lives. A biological tooth substitute that could replace lost teeth would provide a vital alternative to currently available clinical treatments. To pursue this goal, we dissociated porcine third molar tooth buds into single-cell suspensions and seeded them onto biodegradable polymers. After growing in rat hosts for 20 to 30 weeks, recognizable tooth structures formed that contained dentin, odontoblasts, a well-defined pulp chamber, putative Hertwig's root sheath epithelia, putative cementoblasts, and a morphologically correct enamel organ containing fully formed enamel. Our results demonstrate the first successful generation of tooth crowns from dissociated tooth tissues that contain both dentin and enamel, and suggest the presence of epithelial and mesenchymal dental stem cells in porcine third molar tissues.

Absorbable Implants↗
PubMedDate not supplied

[Tooth diseases in the medieval population of Gracanica near Valjevo].

The analyses of the pattern of dental disease in the Late Medieval Serbian population from cemetery excavations in the archaeological site Grachanica were based on the study of tooth wear, ante-mortem tooth loss, caries, hypoplasia, alveolar resorption, abscesses and calculus. The total sample of all available skeletons with almost complete permanent dentition numbers 45 individuals. Dental sample comprises 178 maxillary teeth and 337 mandibular teeth. The presence of dental caries was scored taking into consideration the size of the lesion (four degrees) and its position on the tooth. The degree of tooth wear was graded into one of four categories: atrition of enamel only; atrition involving dentin; atrition up to the level of fissure at the occlusal surface of the molar teeth, and exposure of the pulp chamber. The cystic defects within the alveolar bone were recorded according to their aetiology, size and position. Radiographic study had not been done in order to detect periapical destruction, so the presence of such destruction was recognizable in advanced stages associated with the appearance of fistula penetrating the compact alveolar bone usually at the buccal side. The condition of the alveolar crest resorption, as the evidence of periodontal disease, was graded into three categories, and the distance from the cemento-enamel junction to the alveolar crest was measured. The analysis of dental pathology profile consisted of the two reporting methods: individual count method (prevalence of disease based on the number of individuals affected) and tooth count method (distribution of lesions frequency on tooth type and class). The Grachanica dentition exhibits a dental pathology profile typical of agricultural medieval populations in this region. Tooth wear was the most frequent, affecting 95% of individuals. Dental caries and ante-mortem teeth loss exhibit also high frequency (51% and 69%). Dental pains of low prevalence include abscesses (13%) and enamel hypoplasia (20%). In the material examined, the carious process was responsible for pulp exposure to infection in all cases of abscess formation. The results obtained suggest that food processing technology and nature of diet allowed use of abrasive in the food and that oral hygiene was at the low level. On the other hand, there were not a lot of people who were subjected to stress-induced growth disruptures. The findings reported here contribute to understand how dietary change and life conditions are related to the changing patterns of dental diseases in medieval populations.

History, Medieval↗
PubMed1988

Bone mineral content of mandibles: normal reference values--rate of age-related bone loss.

The purpose was to obtain the normal sex- and age-related reference values for the bone mineral content (BMC) in the bones of the mandible and the forearms, as estimated by dual-photon absorptiometry; to examine the effect of tooth loss on the mandibular BMC, i.e., BMC in the basal part of the mandible; and to analyze the rate of the sex- and age-related BMC loss in the mandible in normal old edentulous individuals greater than or equal to 70 years of age and its relationship to the corresponding BMC loss in the forearm bones. The following groups were measured: young dentate adults (n = 100; women (W): men (M) = 1:1), young, long-term edentulous W (n =15), and old edentulous individuals (n = 24 W, 10 M). In the old group the BMC measurements were repeated after 2- or 3-year period (n = 18 W, 10 M). The analyses indicate that the mandibular BMC reference values differ by sex and age; but correction for the state of dentition seems of minimal benefit. The average BMC loss (%) in the bones of the mandible and the forearms seems to be higher in old W (1.5 and 1.4% per year) than in old M (0.9 and 0.7% per year), but of the same magnitude in each sex. The relationship between the BMC loss (%) in the two sites was significant (P less than 0.01) but rather weak. Thus, it seems important to follow the sex- and age-related BMC loss in the mandible separately.

Adult↗
PubMed1994

Root grooves: a risk factor in periodontal attachment loss.

Periodontal health reflects a balance between harmful and protective elements in the gingival margin area. The total plaque mass, specific periodontopathogens, and local environmental factors may challenge this balance. The aim of this retrospective study was to evaluate the effect of proximal root grooves as a risk factor in periodontal attachment loss. One-hundred and three (103) extracted, formalin-stored, single-rooted teeth showing loss of attachment and having one non-grooved and one grooved proximal root surface were selected for the study. Following staining in 0.1% toluidine blue to visualize attached periodontal ligament remnants, the teeth were examined in a light microscope under incident light. On each tooth, loss of attachment was measured along the long axis of the root from the cemento-enamel junction to the most coronal level of the stained periodontal ligament remnants on mesial as well as on distal surfaces. Incisors and premolars were grouped separately. For both groups, a statistically significant greater loss of attachment was present on grooved than on non-grooved surfaces (P < 0.0001). Generally, there was a direct relationship between groove location and maximum loss of attachment. The results indicate that proximal root grooves should be considered in periodontal diagnosis, prognosis, and treatment planning.

Bicuspid↗
PubMed2005

Long-term survival of endodontically treated molars without crown coverage: a retrospective cohort study.

STATEMENT OF PROBLEM: Teeth are weakened after endodontic treatment and should, ideally, be crowned, especially posterior teeth. However, this is not always possible. Information about the longevity of endodontically treated teeth without crown coverage may assist in selecting appropriate treatment modalities. PURPOSE: The aims of this cohort study were to evaluate the survival rate for endodontically treated molars without crown coverage and to identify possible related factors. MATERIAL AND METHODS: A total of 220 endodontically treated permanent molar teeth in 203 subjects on a waiting list for fixed prosthodontic treatment at the Faculty of Dentistry-Mahidol University, Thailand, were included. Follow-up data were derived from a clinical examination and review of the dental record and radiographs. Subjects were not included in the study if teeth had provisional crowns, definitive restorations with cuspal coverage, or with dowel and core and/or crown restorations. The outcome evaluated was defined as a failure if there were negative findings in the condition of a tooth that required a restoration, tooth repair, or extraction. Tooth loss due to endodontic and periodontal reasons was excluded. The independent variables assessed were patient age, gender, location (maxilla or mandible), the existence of an opposing dentition and adjacent teeth, remaining tooth structure, and types of restorative material. Kaplan-Meier analysis with a 95% confidence level was used to calculate the survival probability, and a log-rank test was used to determine whether significant differences existed. RESULTS: Overall survival rates of endodontically treated molars without crowns at 1, 2, and 5 years were 96%, 88%, and 36%, respectively. With greater amounts of coronal tooth structure remaining, the survival probability increased. Molar teeth with maximum tooth structure remaining after endodontic treatment had a survival rate of 78% at 5 years. Restorations with direct composite had a better survival rate than conventional amalgam and reinforced zinc oxide and eugenol with polymethacrylate restorations. CONCLUSION: Within the limitations of this study, the amount of remaining tooth structure and types of restorative material have significant association with the longevity of endodontically treated molars without crown coverage.

Acrylic Resins↗
PubMed2001

[A survey of oral health status of the elderly individuals in Chengdu of China].

OBJECTIVE: The aim of this survey is to investigate the oral health status of the oldsters over 65-year-old in Chengdu of China. METHODS: The oral health status, including oral hygiene, caries, periodontal diseases and the tooth loss of 468 elderly individuals over 65 years old were surveyed and analyzed. RESULTS: It was found that all these older individuals brushed their teeth everyday, but most of them had tooth decay, gingivitis and periodontitis. About 7.47% of them were edentulous, and 2.56% of them were half edentulous. The masticatory ability of most of them declined and the chewing ability of them was low. CONCLUSION: The oral health status of these elderly individuals in Chengdu is poor. It is therefore necessary to improve the health status of this population.

Aged↗
PubMed2005

Longitudinal study of periodontal disease and edentulism with rates of bone loss in older women.

BACKGROUND: Previous cross-sectional studies have suggested a link between periodontal disease and osteoporosis. The purpose of the present study is to evaluate the association between changes in bone mineral density (BMD) and clinical signs of periodontal tissue destruction and tooth loss over a 2-year period. METHODS: A total of 398 women (mean age 75.5 years) were randomly selected for an ancillary study of periodontal disease; osteoporosis in association with the presence or absence of teeth was evaluated. Osteoporosis in association with periodontal disease was also evaluated. All subjects were participants at the Pittsburgh Clinical Center for the Study of Osteoporotic Fractures (SOF), a prospective cohort study of women 65 years of age or older designed to determine risk factors for fractures. Oral health examinations, including periodontal probing and attachment loss, were performed at the fourth clinical visit, an average of 6 years after baseline. BMD of the total hip and its subregions was measured using dual energy x-ray absorptiometry at the time of dental examination and 2 years later. Results are expressed as annual percentage change. RESULTS: A total of 145 (36.4%) women were edentulous and 163 (80.7%) of the dentate women (N = 253) had periodontal disease. Dentate women reported higher education (P <0.001) and a higher calcium intake (P= 0.002). Absolute BMD and percentage change in BMD were similar in dentate and edentulous women. We found no difference in BMD or in absolute or percentage change in BMD between women with or without periodontal disease. CONCLUSION: Little evidence exists for an association between edentulousness, periodontal disease, and longitudinal changes in BMD.

Aged↗
PubMed1986

Differences in total tooth extraction between an urban and a rural area in the Netherlands.

Differences in total tooth loss between an urban and a rural area (dentist-patient ratio 1:2500 and 1:5700 respectively) have been studied. Patients who participated in this study were those who received total tooth extraction during the calendar yr 1982 (urban area) and 1983 (rural area). The overall dentist response was 90%, the combined patient response was 75%. During the year, in the urban area 137 cases of total tooth extraction were recorded; in the rural area this was 237. This frequency is equivalent to 109 and 226 total tooth extractions per 100,000 inhabitants, respectively. The age and sex distribution of the urban and rural population could not account for this difference. The rural population had a lower educational level and more people insured in a State Health Scheme, which is related to income. The frequency of symptomatic attenders was highest in the rural area among those who were insured in a State Health Scheme. It is concluded that differences in numbers of total extractions between the rural and urban areas cannot be explained entirely by differences in population characteristics.

Adult↗
PubMed1997

The teaching of prosthodontic care for older people: a non-rote philosophy.

This essay complements that de Baat et al in the last issue with emphasis on the importance of the variability between individual older people. The consequent need for an open minded approach towards planning Prosthodontics is discussed, based on each patient's motivation for aesthetics, function, comfort and self esteem. Both functional expectations and motivation to learn effective health behaviour vary widely, and evaluation of both is essential for realistic planning because further tooth loss and the need for partial dentures occur so frequently. The consequent variation in plans raises the question--which are the strategic teeth to maintain a stable dental occlusion or a future tooth stabilised denture? For undergraduates this demands a non-rote approach to learning.

Aged↗
PubMed2000

Placement of implants into ridges grafted with bioplant HTR synthetic bone: histological long-term case history reports.

Following alveolar ridge grafting procedures for ridge preservation, for example, the immediate filling of extraction sockets, and ridge augmentation, for example, the building up of the atrophic jawbone, punch biopsies were obtained at various times postextraction prior to the placement of endosseous root-form implants. These histological sections provided an opportunity to study the bony regenerative response to an osteoconductive synthetic graft material and longer term interactions over a period from 8 months to 12 years. The formation and remodeling of healthy dense lamina of bone in areas where bone voids previously existed either from healed or immediate extraction sockets or where there was jawbone atrophy resulting from multiple tooth loss was observed. The grafting procedures enabled dentists to place implants into sites that would have been impossible if not for these preimplant grafting procedures. The jawbone areas studied involved grafted single sites and quadrants as well as full arch augmentation with a calcified microporous copolymer (Bioplant HTR Synthetic Bone, Bioplant Inc, South Norwalk, Conn) graft material. Retrospective case reports of 24 patients were followed radiographically and clinically to 12 years post-alveolar-ridge grafting and subsequently to 5 years after implants were placed into these augmented ridges. Implant and grafting histories from 4.7 months to 17 years are reported for three of these patients. General applications of synthetic bone grafting before implant placement are recommended.

Adult↗
PubMed2002

Bonded provisional restorations for esthetic soft tissue support in single-implant treatment.

During the early phases of single-implant treatment, clinician needs and patient expectations can be challenging. This article describes a technique for making a simple bonded provisional restoration. In addition to minimizing patient discomfort without increasing laboratory costs, the technique enables soft tissue preservation through all treatment phases, from tooth loss to implant loading.

Acrylic Resins↗
PubMed1990

Indices of root surface caries.

Despite the increasing international interest in recent years in the epidemiology of root surface caries, there is no agreement on the diagnostic criteria to be used when the condition is recorded. In this paper the different methods used by dental epidemiologists are reviewed. It is shown that the wide variation in the levels of root surface caries recorded among different populations could be due to differences in the diagnostic methods as well as to inherent differences in the prevalence of the condition. It is recommended that an attempt be made to reach a global consensus on the methods of diagnosing root surface caries. Also, it is suggested that in reports of epidemiological studies of root surface caries, a basic set of tables including details of tooth loss be included.

Dental Caries↗
PubMed2003

[The cellular and molecular bases of "tooth framing"].

Progress in molecular biology in recent years has enormously increased interest in tooth generation. The enamel knot has been discovered, in consequence. This is a transient structure acting as molecular signaling center, responsible for controlling cusp formation, stimulating growth of surrounding epithelium, and generating new knots or their disappearance through apoptosis. Both tooth development and enamel knots are regulated by a cascade of gene activity where Fgf4, Shh, BMP4, Lef1 and p21 are the prime movers of the processes. Homeobox genes (Msx, Dlx) are the orchestrators of the framing and a series of proteins (adhesion molecules, extracellular matrix components) are the executors of "tooth framing". An important concept has emerged from developmental biology through the identification of the basic mechanisms involved in tooth development: the molecular basis of structure framing shares common rules. Thus similar genetic programs are involved in body structure generation (limb bud, tooth, branching morphogenesis). A deeper understanding of developmental rules regulating tooth formation will make it possible in the near future: a) to modify in vivo homeobox gene expression and restore tooth generation hampered by tooth agenesia due to homeobox gene deregulation; b) to induce complete tooth formation, in case of tooth loss due to trauma or diseases, through implantation in the patient's oral cavity of a synthetic ball containing morphogens and growth factors to stimulate, in the right spatio-temporal sequence, the entire tooth genetic cascade. These concepts will certainly enforce cultural and practical interaction between biology and dentistry.

Animals↗
PubMed2005

Dental caries in older adults.

Dental caries is one of the most significant health problems facing older adults. More than half of the elderly who are dentate are affected with either coronal or root caries, and caries is the primary cause of tooth loss in this population. New materials and techniques are emerging to help with geriatric preventive and restorative needs, but ongoing vigilance for caries will be required in this population, which is experiencing increased longevity and tooth retention.

Aged↗
PubMed1988

Clinical, microbiological and immunological features of subjects with refractory periodontal diseases.

27 subjects with active destructive periodontal diseases were treated by modified Widman flap surgery and systemic tetracycline and divided into 4 groups based on pre- and post-therapy hazard rates (% of sites losing greater than 3 mm of attachment in 1 year). Pre- and post-therapy hazard rates were respectively: group I (3 subjects) less than 4 and less than 4; group II (8 subjects) greater than 4 and less than 4; group III (3 subjects) less than 4 and greater than 4; group IV (refractory group of 13 subjects) greater than 4 and greater than 4. Baseline mean pocket depths and attachment loss of groups I and II subjects were less than groups III and IV subjects and exhibited less suppuration. 6 group IV subjects lost a total of 38 teeth after therapy, in contrast to no tooth loss in subjects in the other 3 groups. Redness, bleeding on probing, plaque levels and age did not differ among groups. Subjects in the 4 groups differed in the subgingival species to which they showed elevated serum antibody responses. Group IV subjects showed elevated responses to a select range of gram-negative species, including A. actinomycetemcomitans strains Y4 or ATCC 29523, F. nucleatum and B. intermedius. No subject in any of the other groups exhibited an elevated response to B. intermedius. The mean % of each species in all sampled sites, both before and after therapy, was computed for each subject. Subjects in groups III and IV (high post-therapy hazard rates) exhibited elevated mean levels of B. forsythus, F. nucleatum, S. intermedius, E. corrodens, and B. gingivalis.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗