摘要:

AbstractThe periodontal probe has been and continues to be used as an important diagnostic instrument by the dental profession. The measurements recorded with the probe have generally been considered to represent a reasonably accurate estimate of sulcus or pocket depth. Recent reports on the histopathology of the periodontal lesion and the histological features of a healing lesion, together with histological studies on the relationship of the probe to periodontal tissues, have shed some new light on periodontal probing.It is now apparent that probing depth measured from the gingival margin seldom corresponds to sulcus or pocket depth. The discrepancy is least in the absence of inflammatory changes and increases with increasing degrees of inflammation. In the presence of periodontitis the probe tip passes through the inflamed tissues to stop at the level of the most coronal intact dento‐gingival fibers, approximately 0.3–0.5 mm apical to the apical termination of the junctional epithelium. Decreased probing depth measurements following periodontal therapy may be due in part to decreased penetrability of the gingival tissues by the probe. Following treatment aimed at obtaining new attachment in periodontal defects, wider variations may occur between the location of the probe tip and the most coronal dento‐gingival fibers than in the case of untreated sites. This is due in part to the formation of a so‐called “long” junctional epithelium. In the absence of inflammation this epithelium may not be penetrable during ordinary probing, but could account for a rapid increase in probing depth measurements when inflammatory changes allow the probe to traverse the epithelium and/or the adjacent infiltrated connective tissue.In view of the difficulty inherent in relating periodontal probing measurements to actual sulcus or pocket depth, the interpretation of periodontal probing in the practice of periodontics may need

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1980.tb01960.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractThe prevalence of juvenile periodontitis was studied in Finland, in an ethnic group representing a uniform Caucasoid population. The study population consisted of the 16–year‐old subjects in the county of Uusimaa, population approximately 1,000,000. The screening study was based on the well‐organized national dental care service which provides free dental care for all, up to the age of 17. Bitewing radiographs taken of all subjects at the age of 16 were used as the basic material for screening for juvenile periodontitis. Altogether 8,096 pairs of bitewing radiographs were available from the 16–year‐old subjects born in 1960–61, representing 56 % of the total age group. The radiographs were examined by the author and 28 cases were singled out for thorough clinical and radiographic examination. The following criteria were set for juvenile periodontitis:–The patient must be in good general health–Radiographically detectable bone loss more than 2 mm must be demonstrated around more than one tooth–Local irritants must not be commensurate with the bone loss.Eight cases among the 8,096 subjects fulfilled these criteria giving a prevalence of 0.1 %. With 95 % confidence this gives an estimate betwee

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1980.tb01961.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractThe purpose of the present investigation was to study the distribution of interproximal periodontal intrabony defects as related to age, sex and localization, and to examine the relationship between some possible etiological factors and the occurrence of intrabony defects.A total of 209 adult patients presenting for dental treatment at the Royal Dental College in Arhus participated in this study. The patients were subjected to a questionnaire and were examined clinically and radiographically. All osseous defects in the radiographs were recorded but only those with a depth and width of at least 2 mm were considered periodontal intrabony defects. Only 18 % of the participants had one or more periodontal intrabony defects but the prevalence was higher in older than in younger age groups. While periodontal intrabony defects occurred with the same frequency on the various tooth types, more defects were found on distal than on mesial surfaces. The presence of periodontal intrabony defects correlated with loss of attachment, increased tooth mobility, a wide interproximal space and open mesio‐distal contact relationships between the teet

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1980.tb01962.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractLongitudinal studies have reported the effect of various modalities of periodontal surgery on pocket depth and attachment levels related to pretreatment measurements. However, possible changes in these measurements as a result of scaling, oral hygiene improvements and occlusal adjustment during the hygienic phase were not considered. The purpose of the present study was to examine the short‐term effect of treatment of the hygienic phase in 90 patients with some pockets extending 4 mm or more apically to the CEJ. Pretreatment pocket depths and attachment levels related to the CEJ were measured by a thin probe in five sites at all 2,355 teeth in the sample. Scaling, root planing, instruction in oral hygiene and occlusal adjustment were completed during four to six sessions for each patient.Four weeks after completion of the hygienic phase, all variables were recorded. Mean measurements for pocket depths 1–3 mm, 4–6 mm. and ≥ 7 mm prior to treatment were compared to their posttreatment scores. Pocket depth decreased significantly for pockets extending 4 mm or more apically to the FGM. For pockets 4–6 mm there was a mean difference in pocket depth of 0.%± 0.47 mm (P<.0001) between pretreatment and post‐treatment observations. For pockets 7 mm or greater the mean difference was 2.22 ± 1.35 mm (P<.0001). Reduction in depth of pocket and improvement in attachment levels were related to the initial level of severity. Pocket reduction was in part due to the improvement in attachment levels. This study has demonstrated that the clinical severity of periodontitis is reduced significantly 1 month following the hygienic phase of periodontal therapy, and that need for surgical pocket treatment cannot be assessed properly until completion of the hygienic phase

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1980.tb01963.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractThe present investigation was performed in theRhesusmonkey to determine the effect of the modified Widman flap procedure on the level of the connective tissue attachment and supporting alveolar bone. Two adult maleRhesusmonkeys were used. Eighteen contralateral pairs of periodontal pockets were produced in a standardized manner. Surgical treatment of the pockets was performed around experimental teeth and the contra‐lateral teeth were used as the unoperated controls. Twelve months following treatment the animals were sacrificed and histological sections obtained. Using the cemento‐enamel junction (CEJ) as a fixed reference point, linear measurements along the. root surface were made to the most apical cells of the junctional epithelium (JE), to the crest of the inter‐proximal alveolar bone (CR), and to the apical extent of angular bony defects (AAD). These measurements from operated and unoperated pockets were then compared.The data revealed that treatment of periodontal pockets using the modified Widman flap procedure produced no gain in connective tissue attachment and no increase in crestal bone height. In angular bony defects a certain degree “bone fill” was noted. This bone repair was never accompanied by new connective tissue a

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1980.tb01964.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractThe present study was undertaken to determine the effect of four periodontal regenerative procedures on the connective tissue attachment level. The procedures tested were: 1) the modified Widman flap procedure, 2) the modified Widman flap procedure combined with transplantation of previously frozen autogenous red marrow and cancellous bone, 3) the modified Widman flap procedure in combination with implantation of beta tricalcium phosphate, and 4) periodic root planing and soft tissue curettage. Eight adultRhesusmonkeys, divided into four equal groups, were used. Periodontal pockets were produced around contralateral teeth in a standardized manner. In each group of animals, the pockets on one side of the jaws were subjected to one of the above‐mentioned surgical treatments, while the contralateral pockets remained as unoperated controls. Three weeks before surgery, a carefully designed plaque control program was instituted and continued until the animals were sacrificed 12 months after surgery. In histologic sections, linear measurements along the root surfaces were made from the cemento‐enamel junction (CEJ) to the most apical cells of the junctional epithelium (JE). These measurements from operated and unoperated sites were then compared.The data revealed that healing following the four different regenerative procedures resulted in the reformation of an epithelial lining (long junctional epithelium) along the treated root surfaces, withnonew connective tissue attachm

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1980.tb01965.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractA double‐blind, crossover design study was performed on 29 young adults to test the effectiveness of 0.1 % SnF2mouthrinse (250 ppmF−) on plaque formation using clinical and microbiological criteria.Participants were assigned to either a placebo or SnF2rinse which was used twice daily for 5 days. After an interim recovery period of 2 days, the participants used the alternate rinse in a similar manner for another 5 days. Clinical data collected at the end of each experimental period included Gingival Index (GI), and plaque scores. Supragingival plaque removed from each subject at the end of the experimental periods was weighed and then microbial enumeration was performed.Results showed that after SnF2rinses, there were statistically significant reductions (P<0.01) in plaque wet weight, number of bacteria per milligram plaque (CFU/mg). and total number of bacteria per sample (Total CFU). Visual plaque scores (PS) showed a significant (P<0.05) but small reduction as a result of SnF2rinse. No significant difference in gingival inflammation was noted.It is apparent from this study that, besides the well‐documented ability of SnF2to increase the resistance of teeth to demineralization, this agent is capable of reducing plaque formation. Long‐term studies are indicated to examine usefulness of SnF2in the control of early periodontal

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1980.tb01966.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

AbstractThe clinical measurement of horizontal tooth mobility is discussed on the background of the current theories regarding the pathogenesis of periodontal disease. The common indices which have been designed to measure horizontal tooth mobility are discussed and critiqued. These indices are not sensitive in that they do not discriminate well between small increments in mobility. In addition, many of the indices cannot be utilized for individual teeth on a longitudinally reproducible basis.The preliminary testing of anin vitromodel with mobile teeth which was designed to aid the clinician in assessing tooth mobility is described. Results indicate that the clinician may be capable of discriminating between mobilities that are in the 0.1 mm range, with the aid of the model.

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1980.tb01967.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY