摘要:

AbstractThe protective role of cementum against root resorption is discussed in relation to buried teeth, orthodontic treatment, replantation and periodontal disease. The essential feature seems to be a layer of partially calcified precementum or vital cementoblasts. Root resorption close to the epithelial attachment, although not common, is probably the result of death of cementoblasts caused by irritants from bacterial plaque, and the presence of severe or prolonged inflammation. Cementum exposed in the pocket can be affected in different ways by these irritants, and rendered unacceptable for re‐attachment to periodontal tissue. Successful re‐attachment procedures involve either the removal of the affected cementum or its treatment with agents partially to decalcify such as acids, or detoxify by phenol for example. Examples of treatment embodying some of these principles arc illustrated by two case histories of localised gingival recession and one of intra‐bony pocketing associated with an acute lateral periodontal abscess. In this case a follow‐up radiograph taken 16 years later is presented as evidence of the permanence of repair which can he achieved. Root resorption which often follows the use of fresh autogenous bone from the ilium is then discussed and the conclusion reached that the vital cells in the transplant discourage the migration of cementoblasts from the adjacent periodontium. The cementum and dentine thus remain unprotected and susceptible to res

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1978.tb01901.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractThe present investigation was undertaken to quantitate the osseous changes which occur throughout the entire circumferential extent of infrabony periodontal defects in patients with optimal plaque control. Fifteen defects were selected in nine patients. Periodontal surgery was scheduled after each patient had shown an ability to practice efficient plaque removal. Muco‐periosteal flaps were raised and the osseous defects debrided. The dimensions of each defect were measured at several specific location points within the defect. The flaps were replaced at their original location and, post‐operatively, optimal plaque control was maintained in the area (Mean Plaque Index 0.04). Six to 8 months after the initial surgery all areas were re‐operated and the osseous defects were remeasured at the same specific location points. Each defect showed osseous regeneration at every location point. The mean initial osseous defect depth at a location point was 3.5 mm and the mean amount of bone regeneration which occurred was 2.5 mm. Crestal alveolar bone resorption occurred at almost half of the location points and averaged 0.7 mm. Eleven of the 15 deefcts had resolved completely. There were isolated areas where a shallow defect persisted in the remaining four defects. The behavior of an osseous defect throughout its circumferential extent was characterized by a combination of coronal hone regeneration (mean 77%) and marginal bone resorption (mean 18%). Infrabony periodontal defects may predictably remodel after surgical debridement and establishment of optimal plaque co

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1978.tb01902.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractEarlier studies suggest that children and adults differ in the propensity to develop gingivitis when oral hygiene is abandoned. To confirm the existence of such a difference, a comparative study of pre‐school children and young adults was made with objective registration methods. The author performed all registrationsAfter a period of intensive oral hygiene, all cleaning of teeth was discontinued for 21 days. The amount of bacterial plaque, the amount of gingival exudate and crevicular leukocytes and the bleeding tendency were registered on days 0, 7, 14 and 21.During the experiment the amount of bacterial plaque increased continously in both groups. The amount of gingival exudate and the tendency to gingival bleeding increased to high values in the adults, while only a small rise was seen in the children. The amount of crevicular leukocytes increased in both groups, but the increment was greater in the adults.A comparison concerning differences in gingival exudate and bleeding tendency between pre‐school children and adults was undertaken for gingival units that showed a similar plaque development. Under these statistically acceptable prerequisites, it was shown that there is a real difference in the tendency to develop gingivitis between pre‐school children and a

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1978.tb01903.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractTwo experiments tested the effects of xylitol or sucrose‐containing chewing gums on plaque formation. In the first experiment the 18 subjects maintained their normal dietary habits, and in the second they received a sucrose‐free diet during the 3‐day experimental periods. Plaque formation was assessed gravimetrically and/or planimetrically. When the dietary habits were not altered, neither the sucrose nor the xylitol‐containing chewing gums had significant effects on the plaque scores. When sucrose was almost eliminated from the diet, plaque formation was significantly higher in the sucrose than in the xylitol and the placebo groups. Although plaque formation was lower in the xylitol group than in the placebo group, the differences were not statistically sign

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1978.tb01904.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractUsing a split‐mouth technique in 20 patients, a comparison was made of the linear and scalloped incisions an used in the reverse bevel technique. Forty full thickness periodontal flap procedures were evaluated. The PII and GI were recorded and gingival fluid collected at operation and at weeks 1, 2, 3, 4 and 12 after operation. Pocket depths and attachment levels were noted and gingival contour assessed, using the Contour Index, pre‐operatively and 12 weeks after operation. Pain experience during the first week after operation was evaluated. No significant changes in PII occurred throughout the study. The GI and gingival fluid flow showed comparable trends. More inflammation was present after the linear incision during the first 2 weeks after operation. Clinically, satisfactory results were achieved for both scalloped and linear incision procedures as shown by the improvement in gingival contour, reduction in pocket depth, slight gain in attachment, lack of gingivitis and low plaque sco

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1978.tb01905.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractForty‐one patients requiring gingivectomy in one or more areas were used for a clinical evaluation of three different periodontal dressings. Sixty‐five operations were performed. Whenever possible different dressings were tested in the same patient. The type of dressing was chosen randomly, applied by one operator and left in place for 1 week. The patients were supplied with analgetic tablets. At day 7 the condition of the dressing was evaluated before removal. The patients' subjective experiences of pain, swelling, bleeding and fever, as well as use of pain relieving tablets, were recorded. The wound was evaluated with regard to the degree of epithelialization, presence of denuded bone and granulation tissue. The tendency to bleeding and the sensitivity of the teeth to a water spray (15°C) were tested. At day 14 and 21 the same evaluation procedure was repeated. In addition the presence of plaque in the operated area was assessed.One of the dressings more frequently induced pain and swelling than the others. Tablet consumption was also higher when this dressing had been used. No statistically significant differences were found in the clinical assessment of wound healing, tendency to bleeding and the sensitivity of t

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1978.tb01906.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractExperimental breakdown of the periodontal attachment apparatus was produced in six young adult monkeys to study the effect on the tissue of the dental pulp by (1) periodontitis, (2) scaling and plaque accumulation on exposed root dentin. Periodontal tissue breakdown was induced by the placement of ligatures around the neck of 92 permanent teeth. Subsequent plaque formation caused marked loss of periodontal tissue support, which after a period of 5–7 months amounted to 30‐40% of the roof length. One group of teeth received no further treatment. Other teeth were subjected to scaling and root planning. Following treatment, plaque was allowed to accumulate for 2, 10, and 30 days on the freshly planed root dentin surfaces. Histoiogic examination revealed that in comparison to teeth with normal periodontal conditions, 57% of the teeth exposed to periodontitis exhibited pathologic pulp tissue alterations. Secondary dentin formation and/or inflammatory cell infiltrates were observed within localized areas of the pulp subjacent to root surfaces exposed to periodontal tissue destruction. The changes within the pulp were of “mild” nature and only one tooth displayed signs of total pulp necrosis. Lateral canals communicating with both the pulp cavity and the exposed root surface were never detected. Teeth subjected to seating and subsequent plaque accumulation in comparison with teeth with periodontitis alone exhibited no obvious aggravation or increased incidence of pathologic pulp reactions. The findings show that in the monkey (1) periodontal destruction limited to the cervical half of the root and (2) plaque accumulation on exposed root dentin does not cause severe alteration in the pulp of the roots i

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1978.tb01907.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

摘要:

AbstractA case of chronic benign neutropenia in a 7‐year‐old Caucasian male is reported. The predominant clinical symptoms were persistent gingivitis and periodontitis. The clinical, hematological, oral radiographical, histological, and therapeutical features of this uncommon disease are discus

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1978.tb01908.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1978.tb01909.x

出版商:Blackwell Publishing Ltd    

年代:1978

数据来源: WILEY