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Biomedical subjects

G Greenstein

Publications and source records attributed to G Greenstein.

At least 73 records · Page 4Linked to original sources
PubMed1986

Chlorhexidine. An adjunct to periodontal therapy.

Chlorhexidine is an effective antimicrobial agent. Its application can enhance periodontal therapy. The pharmacology of chlorhexidine and suggestions for its use are outlined. In addition, its potential for inducing cancer and bacterial resistance are discussed.

Absorption↗
PubMed1985

Microscopic monitoring of pathogens associated with periodontal diseases. A review.

Microscopic monitoring of the subgingival microbiota to detect pathogens associated with periodontal diseases has been an active area of investigation. Researchers have demonstrated that plaque samples obtained at diseased sites contain more motile bacteria and less coccoid forms than healthy sites. Therapy at diseased locations has resulted in a shift in the microbiota to one that resembles healthy sites. However, the ability to predict disease activity based on morphotype counts still remains unverified. The current literature addressing chairside microscopic assessments as a diagnostic parameter is reviewed and discussed.

Bacteria↗
PubMed1985

Repair of anterior gingival deformity with durapatite. A case report.

After the extraction of a maxillary anterior tooth, a gingival deformity may occur due to the loss of the labial plate of bone. This often creates an esthetic problem in the construction of a fixed partial denture. In the past, various surgical techniques have been devised to eliminate this gingival defect. A technique using durapatite is discussed.

Dental Implantation↗
PubMed1985

Diagnosis of bone lesions by subtraction radiography.

Examiner diagnostic accuracy and response times were compared using subtraction and conventional radiography in a dog model. Osseous lesions were induced interproximally and through the mandibular buccal bone interradicularly and radicularly. Standardized preoperative and postoperative conventional radiographs of the induced lesions were compared to subtraction images of the same sites by 11 dentists. Examiners using the subtraction technique demonstrated improved diagnostic performance (P less than 0.001) and response times (P less than 0.001). Additionally, this method yielded a 30% reduction in equivocal diagnostic decisions. Data from this study suggest that subtraction radiography is a sensitive and accurate method to detect osseous lesions associated with periodontal diseases.

Alveolar Process↗
PubMed1984

The role of bleeding upon probing in the diagnosis of periodontal disease. A literature review.

Assessment of bleeding upon probing is an integral part of a periodontal examination. Recent investigations have indicated that bleeding reflects histological, clinical and bacteriological alterations associated with periodontal disease. Furthermore, clinical and histologic data suggest that bleeding is an earlier sign of gingivitis than visual signs of inflammation (redness and swelling). The current literature referring to the role of bleeding upon probing in the diagnosis of periodontal disease is reviewed, and its limitations as a clinical parameter are discussed.

Bacteria↗
PubMed1984

Treatment of juvenile periodontitis patients by control of infection and inflammation. Four case reports.

Four patients, ages 14-17, who demonstrated characteristics of juvenile periodontitis, underwent antibiotic and surgical therapy to control microbial etiologic factors. No occlusal equilibration or bone grafting techniques were employed. Subsequent to treatment, all four patients demonstrated decreased pocket depths and mobility on teeth associated with vertical osseous defects. Osseous repair was evident on postoperative radiographs. Reentry procedures, on one patient, confirmed that osseous repair had occurred in 2- to 3-wall, 3-wall, hemi-circumferential and furcal defects. If infection and inflammation are controlled, it appears that the potential for osseous repair in juvenile periodontitis patients is greater than has been thought.

Adolescent↗
PubMed1981

Depth of periodontal probe penetration related to clinical and histologic signs of gingival inflammation.

The purpose of this study was to determine if the depth of periodontal probe penetration into the gingival sulcus was related to bleeding after probing with a standardized force, visual signs of gingival inflammation, and histological parameters of gingival inflammation. Sixty midfacial gingival sites in 26 persons were evaluated for presence or absence of visible inflammation and bleeding after probing using a controlled insertion pressure of 25 gm. In order to delineate the area for histologic analysis, a reference incision was made on the facial surface of the gingiva which corresponded to the depth and mesio-distal extent of the area probed and evaluated for visual signs of inflammation. Gingival biopsy specimens were histometrically analyzed to determine the depth of probe penetration and percentage of inflamed connective tissue. Statistical analysis of the data demonstrated that probe penetration was significantly greater in the presence of visible inflammation, but not with bleeding after probing. Furthermore, only a weak correlation existed between depth of probe penetration and percentage of inflamed connective tissue adjacent to the area probed.

Adult↗
PubMed1981

Relationships between epithelium and connective tissue in inflamed gingiva.

Since chronic inflammation has been associated with degenerative and proliferative responses in connective tissue and epithelium, it was decided to investigate quantitatively the proportions of epithelium and connective tissue in inflamed gingiva. Forty-five midfacial gingival sites were assessed prior to biopsy for the presence or absence of bleeding after probing using a controlled insertion force fo 25 g. In order to delineate the corresponding area for histologic analysis, a reference incision was made on the facial surface of the gingiva which demarcated the depth and mesio-distal extent of the area probed. Step-serial bucco-lingual sections were morphometrically analyzed to determine the percentages of epithelium, inflamed, and noninflamed connective tissues coronal to the reference incision. The data was compared with respect to the presence or absence of bleeding after probing. Specimens which bled after probing had significantly less epithelium and more connective tissue. The increase in overall connective tissue was due to a significant increase in the inflamed component, and it appeared that the decrease in epithelium corresponded to the increase in inflamed connective tissue. The findings of diminished epithelium overlying inflamed connective tissue reinforces the concept that connective tissue status is important for determining structure and function of epithelium.

Adult↗