摘要:

the purpose of this studywas to statistically compare the bone regeneration and/or remodeling that occurred in human periodontal osseous defects treated with frozen allogenic, cancellous, iliac bone and marrow grafts, to defects treated by nongrafted flap curettage using a split‐mouth protocol. Six patients were selected to participate in the study. These patients exhibited bilateral intrabony periodontal defects that had been refractory to nonsurgical periodontal therapy. Twenty‐three intrabony defects were treated by osseous grafting using allogenic iliac bone and marrow and 32 intrabony defects were treated by open debridement procedures. The bony regeneration in each defect treated was evaluated by probing measurements taken from a fixed reference made at the initial surgery and at reentry 1 year after transplantation. The overall results of this study demonstrated that the percentage of osseous regeneration that occurred in intrabony defects treated by allogenic bone and marrow grafting was statistically greater than that which occurred in defects treated by nongrafted flap curettage procedures.

ISSN:1049-8885    

DOI:10.1902/jop.1986.57.4.205

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

eight intrabony lesions in four patientswere removeden bloc3 to 8 months after periodontal flap debridement. At the time of debridement, the position of the gingival margin and the most apically located calculus were notched to serve as reference points. All lesions received “Synthograft®” implants and lesions healed uneventfully. Even though these were severely involved periodontal sites, clinical measurements at time of block removal demonstrated gingival recession (average = 2.9 mm) and a gain in clinical closure (average = 2.6 mm).Histologically, graft particles were present in each specimen. They were walled off by collagen and did not appear to enhance new attachment nor did they induce an inflammatory infiltrate. Thus, they seemed to act as nonirritating fillers. Microscopically, closure of the lesions demonstrated repair with limited evidence of new connective tissue attachment. Histologic expression of the clinical gain in closure was the result of closure by long epithelial adhesion (long junctional epithelium) and possible linkage of dentinal collagen with gingival fibers at areas of dentinal resorption. These variations in closure were often seen within the same clinical site.

ISSN:1049-8885    

DOI:10.1902/jop.1986.57.4.211

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

active tissue destruction in experimental periodontitishas been positively correlated with subgingival spirochetes and total number of organisms. The present study was designed to inhibit spirochete populations and evaluate the effect upon periodontal destruction. Metronidazole was administered orally to four squirrel monkeys (100 mg/kg/bwt) for 17 days, After 3 days, marginal periodontitis was induced around bicuspids and molars by tying silk ligatures at the gingival margins. Subgingival plaque samples were taken baseline and 14 days after ligature placement. Dark‐field microscopy quantitated motile forms, spirochetes, straight and curved rods, filaments, cocci and fusiforms. Periodontal destruction was evaluated at 2 weeks by histometric analysis of connective tissue attachment, crestal alveolar bone and infiltrated connective tissue. Bacterial and histometric comparisons were made with experimental periodontitis data from four animals (control) which had not received metronidazole.Subgingival plaque prior to periodontitis induction was dominated by cocci, but fusiforms and straight rods were also present. Straight rods formed a greater proportion of the plaque which developed in metronidazole‐receiving animals. The absence of spirochetes and motile rods contrasted with the control group where spirochetes were the predominant type. The total number of bacteria was also larger in the control animals. Histometric analysis showed that areas of infiltrated supracrestal connective tissue were similar in both groups. Loss of connective tissue attachment and alveolar bone was significantly less in experimental animals, and the latter values did not differ significantly from baseline dimensions. The results indicated that the subgingival bacterial populations which developed during metronidazole administration did not result in an experimental periodontitis.

ISSN:1049-8885    

DOI:10.1902/jop.1986.57.4.218

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

bacterial adherence to gingival cellswas compared in rats with spontaneous gingivitis (SUS rat) and in control rats (RES rat). In the SUS rat, the number of adherent bacteria in gingival cells changed according to the progression of gingival inflammation. There was a correlation between the change of the number of adherent bacteria, progress of inflammation and pH in the pocket. In the RES rat, the number of adherent bacteria was constant and very small. In the adherence assay, adherence ofBacteroides intermediusto epithelial cells was dependent on the pH. Adherence ofB.intermediuswas better than that of other species.B.gingivalisandB.macacaeshowed good adherence butB.leviishowed poor adherence. Adherence to the epithelial cells of the SUS rat was always better than that of the RES rat. These results were supported by scanning electron microscopic studies.

ISSN:1049-8885    

DOI:10.1902/jop.1986.57.4.225

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

palato‐radicular grooves in maxillary lateralincisors have been implicated as an initiating factor in localized gingivitis and periodontitis. Focal loss of periodontal attachment associated with these grooves, some of which may extend to the apical third of the root, could result in a hopeless prognosis for tooth retention. There is disagreement as to the prevalence of this anomaly. As well, little is known about the shape, location and length of the defect. This study examined 3168 extracted maxillary lateral and central incisors. Of these teeth 4.6% had a palato‐radicular groove. About half of the grooves terminated on the root and 58% of these extended more than 5 mm from the cementoenamel junction. A poorly described deformity, displacement of the cementoenamel junction, occurred in 38% of the grooves which crossed that structure. Although an extension of enamel in the groove has been suggested as a possible factor in the progression of localized periodontal disease, its presence was rarely observed.

ISSN:1049-8885    

DOI:10.1902/jop.1986.57.4.231

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

this study assessed connective tissueand epithelial responses to dentin specimens obtained from periodontitis‐affected roots of human teeth after surface demineralization. Rectangular dentin specimens with opposite faces of root and pulpal dentin were prepared from beneath root surfaces covered by sheets of calculus. One half of the specimens were treated with citric acid, pH 1, for 3 minutes, while the remainder served as untreated controls. Specimens were implanted vertically into incisional wounds on the dorsal surface of rats with one end of the implant protruding through the skin. Four specimens in each group were available 1, 3, 5 and 10 days after implantation. Histologic and histometric analyses included counts of adhering cells, evaluation of attached connective tissue fiber density and diameter, and assessment of epithelial migration. Analyses within each group comparing root and pulpal surfaces showed no differences between any of the parameters. Comparisons between experimental and control groups showed that demineralized surfaces had a greater number of cells attached, fiber attachment occurred and epithelial downgrowth was inhibited. Surface demineralization of dentin from periodontitis‐affected roots predisposed toward a connective tissue attachment.

ISSN:1049-8885    

DOI:10.1902/jop.1986.57.4.235

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

this paper reports five casesof a heretofore unreported condition of the gingiva named reticular mandibular gingival ridges. Occurring in middle‐aged males, macroscopically, they are bilateral ridges on the mandibular attached gingivae resembling rugae and having a reticular pattern that may be mistaken for lichen planus. Microscopically, they are formed of fibrous tissue with vessels that have a minimal perivascular infiltrate; the epithelium has extension of rete ridges. Of unknown etiology, the condition does not appear to change, is innocuous and does not require treatment.

ISSN:1049-8885    

DOI:10.1902/jop.1986.57.4.247

出版商:Wiley    

年代:1986

数据来源: WILEY

摘要:

this report reviews the literatureconcerning the periodontal considerations involved in nonextraction management of impacted teeth. Further, it describes the clinical and radiographic features of periodontal tissue response to an 18‐mm extrusion and 160 degree simultaneous rotation of a horizontally impacted maxillary central incisor in a 22‐year‐old female patient.Following surgical exposure of the unerupted incisor, an elastic thread traction was used to orthodontically move the tooth to the line of occlusion. Posttreatment evaluation of the periodontal and gingival response to a tooth movement of this complexity and magnitude was very favorable from the esthetic and functional aspects.

ISSN:1049-8885    

DOI:10.1902/jop.1986.57.4.251

出版商:Wiley    

年代:1986

数据来源: WILEY

ISSN:1049-8885    

DOI:10.1902/jop.1986.57.4.257

出版商:Wiley    

年代:1986

数据来源: WILEY