摘要:

The morphology ofsupragingival and subgingival calculus on extracted teeth was studied with the scanning electron microscope. Oral, crevicular, and fracture surfaces were examined. Both subgingival and supragingival calculus had a heterogenous core covered by a soft, loose layer of microorganisms. On supragingival calculus this layer was dominated by filamentous microorganisms while subgingival calculus was covered by a mixture of cocci, rods and filaments. The supragingival covering of filaments was oriented with the filaments approximately perpendicular to and in direct contact with the underlying dense calculus. This arrangement was rarely seen subgingivally where there was no distinct pattern of orientation. Some of the specimens of sub‐ and supragingival calculus were treated with sodium‐hypochlorite. These lost the soft covering, and channels the same size as the filamentous organisms were found penetrating into the calculus. They were oriented perpendicular to the surface in supragingival calculus but had no specific direction in subgingival calculus. The appearance of the channels supports the concept that calcification starts between the microorganisms in both subgingival and supragingival calculus.

ISSN:1049-8885    

DOI:10.1902/jop.1980.51.10.553

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

Twenty‐two anteriorand bicuspid teeth that previously had been designated for extraction, were removed from 11 male patients. Two teeth were extracted from each patient and each tooth had a periodontal pocket of at least 4 mm and a Gingival Index of 2 or 3. One tooth in each patient was subjected to scaling, root planing, and plaque control in an effort to reduce gingival inflammation. By means of an orthodontic tube and composite resin bonding material a periodontal probe under 15 to 20 gm of pressure was fixed in the periodontal pocket of each tooth. The specimens were removed en bloc and histologic specimens prepared. The conclusions were that when the gingiva is inflamed, the tip of the periodontal probe tends to extend to the apical base of the junctional epithelium or slightly beyond but there is great variation in this position. Further, it was concluded that the position of the probe tip during probing is not affected by the depth of the sulcus or periodontal pocket.

ISSN:1049-8885    

DOI:10.1902/jop.1980.51.10.563

出版商:Wiley    

年代:1980

数据来源: WILEY

ISSN:1049-8885    

DOI:10.1902/jop.1980.51.10.570

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

Astudy wasundertaken to evaluate the antigenic potential of allogeneic freeze‐dried skin (FDS) when used as a grafting material and to examine the clinical results when FDS is used for the correction of mucogingival problems in humans. FDS was obtained from an HLAtissue‐type donor according to Navy Tissue Bank protocol. Allogeneic FDS grafts were performed to correct mucogingival problems. In addition, periosteal fenestration was used in conjunction with approximately one‐half of the grafts. Documentation with a standardized periodontal probe consisted of clinical measurements taken preoperatively and 8 weeks postoperatively. Blood samples were drawn prior to and at 1,2,3,5, and 8 weeks postsurgically. Testing of blood samples for anti‐HLA antibody was performed by use of a modified microcytotoxicity assay. Thirty‐one patients received 36 FDS grafts involving 148 tooth sites. The FDS allografts resulted in a significant (P<0.001) increase in the width of attached‐type tissue (mean gain = 3.80 mm). Clinically, there was no sign of graft rejection, and serologically, all serum samples tested were negative for the presence of anti‐HLA antibody. FDS grafts used for the treatment of mucogingival problems in humans are nonimmunogenic as evaluated for anti‐HLA antibody. The surgical procedure performed using FDS as a graft material resulted in a significant increase in the width of attached‐type tissue.

ISSN:1049-8885    

DOI:10.1902/jop.1980.51.10.571

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

Sixty adult patientswere examined for dentin hypersensitivity prior to periodontal surgery. Stimuli used included mechanical, cold water and compressed air blasts. A subjective assessment of the degree of hypersensitivity for each stimulus was recorded. This presurgical examination revealed 249 hypersensitive areas among 60 subjects. Following surgery there was over a 100% increase in the pain (hypersensitivity) score. Desensitization with a 10% strontium chloride hexahydrate dentifrice was begun 1 week after surgical treatment. After 7 weeks of dentifrice use the pain score was reduced 75.5% in the test group. This was a reduction to a point below the preoperative level. The placebo group showed a reduction of 34.2% which was still above the preoperative level. These results agree with other clinical studies that have demonstrated a desensitizing effect of strontium chloride.

ISSN:1049-8885    

DOI:10.1902/jop.1980.51.10.578

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

The inflammatory potentialof diseased cementum was studied by implanting 70 autogenous fragments from periodontally involved roots into the mucosa of 56 patients. The implants were divided into groups depending upon the type of preparation the root received prior to implantation. Fifteen healthy root fragments implanted into 15 patients served as controls. Histologic results showed that implanted fragments from roots that had been scaled caused the most response with acute inflammation up to 14 days and chronic inflammation to 21 days. In cases in which these fragments were autoclaved the acute inflammation was not as severe. In the cases in which the roots were planed and autoclaved, even less acute inflammation was seen in the 7‐day specimens while some chronic inflammation persisted in the 21‐day specimens. Implants from healthy roots evoked no response. The inflammation caused by the autoclaved diseased cementum was attributed to thermo‐stable endotoxin. It was concluded that in advanced periodontal disease it is necessary to remove all of the cementum exposed to the pocket to eliminate its potential for inducing inflammation.

ISSN:1049-8885    

DOI:10.1902/jop.1980.51.10.582

出版商:Wiley    

年代:1980

数据来源: WILEY

ISSN:1049-8885    

DOI:10.1902/jop.1980.51.10.593

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

Acase ofPapillon‐Lefèvre syndrome is presented. Hyperkeratosis of the palms and soles along with precocious destruction of the periodontal support of both the primary and permanent dentitions were observed. Ectopic intra‐cranial calcified deposits, seen in some cases of the syndrome, were absent in this case. A greater awareness of this condition among dentists and dermatologists would be helpful in identifying more cases for study.

ISSN:1049-8885    

DOI:10.1902/jop.1980.51.10.594

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

Interproximal bone lossaround 100 teeth with overhanging amalgam restorations was measured and compared to interproximal bone loss around 100 contralateral teeth without overhanging amalgams. The latter served as controls. Overall, bone loss was found greater around teeth with overhangs (P<0.01). This finding was true for all periodontal disease types. However, the more severe the periodontal disease the greater the role of the overhang appeared. Small overhangs, unlike medium and large overhangs, did not result in increased alveolar bone loss around the affected tooth.

ISSN:1049-8885    

DOI:10.1902/jop.1980.51.10.599

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

Amethod wasdeveloped and evaluated in a pilot study to determine a relationship between gingival health, crevicular fluid flow and the production of H2S from the crevicular fluid. A moderate degree of correlation was observed between the crevicular fluid volume and the gingival index. A stronger correlation was obtained between the crevicular fluid volume and H2S production by the crevicular fluid. The method described could prove useful in evaluating gingival health and disease objectively and for monitoring the activity of periodontitis.

ISSN:1049-8885    

DOI:10.1902/jop.1980.51.10.603

出版商:Wiley    

年代:1980

数据来源: WILEY