摘要:

AbstractThe etiology of extrinsic tooth discolorations due to chemical, plaque‐preventive agents is not fully understood. However, information from experimental investigations point to at least 3 possible mechanisms. (A) Non‐enzymatic browning reactions (Maillard reactions). (B) Formation of pigmented metal (Fe, Sn)‐sulfides. (C) Reaction products of food and beverage constituents and chemical, plaque‐preventive compounds. Available evidence indicates that browning (A) and formation of pigmented metal sulfides (B) are the most likely causes of these discolorations while dietary factors (C) may play a modifyi

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1985.tb00924.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractIncisors, cuspids and premolars in 49 patients with advanced chronic periodontitis were treated with initial, non‐surgical periodontal therapy. The results were monitored by probing attachment level measurements at 6 sites of each tooth every 3rd month during a period of 24 months. A series of 9 probing attachment level measurements for each site was subjected to linear regression analysis. The slope of the regression line, the projected probing attachment loss during the 24‐month interval (Δy) and the probability level of the slope were calculated for each site. 2 groups of sites with probing attachment loss were identified: group 1: sites with Δy>1.5 mm andp1.0mm andp<0.05. Group 1 included 120 sites (5 %) and group 2 included 265 sites (10 %) of the total of 2532 available sites. In both groups, probing attachment loss was more frequently noticed for sites with an initial probing depth ≤ 3.5 mm than for sites with initial probing depth ≥ 7.0mm. The finding that the majority of sites with probing, attachment loss was found amongst initially shallow or moderately deep lesions may indicate attachment loss due to trauma associated with therapy rather than loss as a result of a continuing, inflammatory disea

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1985.tb00925.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractCandidal counts at 6 mucosal sites in 33 subjects were estimated by imprint culture before, during and after removable orthodontic appliance therapy. Additionally, dental plaque scores and salivary pH were measured at each stage.Whole mouth and site prevalence of candida rose significantly during therapy before falling to levels approximating initial values. A similar pattern was seen for candidal counts for the whole mouth and at individual mucosal sites, although post‐treatment densities were usually lower than originally seen. The number of sites colonised by Candida and salivary pH also increased significantly during treatment and fell significantly afterwards.Only the upper palatal plaque scores rose during therapy and most other dental sites showed a gradual decrease in value during the course of the study. This could be attributed to regular monitoring of the patient's oral hygiene procedures.This investigation demonstrated a direct relationship between the presence of an acrylic appliance, candida and low salivary pH levels. Furthermore, removable appliance therapy had a positive, though transient influence upon the prevalence and density of oral candidal carriage, suggesting that the appliance may initiate the carrier stat

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1985.tb00926.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractThis study evaluates whether suturing of replaced flaps with crown‐attached sutures, following reconstructive surgery, counteracts postoperative recession of the gingival margins and facilitates new attachment.Through‐and‐through furcation defects were created in the mandibular premolars of 5 beagle dogs. Bone was surgically removed from the furcation and around each root to a level 3 to 4 mm below the cemento‐enamel junction. Steel wires were placed in the furcations for 6 weeks to enhance plaque formation. After 12 weeks, reconstructive surgery that included acid conditioning of root surfaces was performed. On 1 side of the mandible, the flaps were replaced and secured by bonding the sutures to the teeth with composite resin. On the other side, the replaced Caps were sutured interdentally with single sutures. The results demonstrated that the margins of flaps secured with interdental sutures shifted apically to the fornix of the furcations after 1 week, and histologically all 10 furcations were found to be lined with epithelium. Margins of flaps secured with crown‐attached sutures remained an average of 0.5 mm coronally to the fornix, and 13 of the 14 teeth showed new attachment.The results indicate that a suturing technique which counteracts gingival recession, favours the formation of new attachment in this beagle

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1985.tb00927.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractThe present clinical trial was performed 10 study whether subgingival scaling is a method of therapy which is equally effective as “access” Haps in reducing gingivitis and probing depths and in improving probing attachment levels. The study was also designed to assess whether granulation tissue removal is a determining factor for proper healing in the treatment of periodontal disease.15 patients with advanced periodontal disease were included in the study‐ Each patient had at least 4 sites in each quadrant of the jaws with probing depths exceeding 6 mm. A baseline examination was performed to assess the following parameters: the oral hygiene status, the gingival conditions, the probing pocket depths and the probing attachment levels. In addition, in each quadrant, 3 approximal sites were selected for analysis of the subgingival microbiota. All of these sites showed signs of gingivitis. One site had a probing depth of<4 mm, another a probing depth between 4 and 6 mm and the third site had a probing depth exceeding 6 mm. The subgingival bacterial samples were‐ studied by dark‐field microscopy and the % of spirochetes and motile rods was assessed.By random selection the 4 jaw quadrants in each patient were treated for periodontal disease by the use of<11 the modified Widman flap procedure, (2) the modified Kirkland flap procedure or by (3) non‐surgical scaling and root planing. In all, 20 quadrants were treated with each of the 3 procedures.After the termination of active periodontal treatment, all patients were recalled for professional tooth cleaning once every 2 weeks during a 12‐week period, Subsequently, they were recalled for prophylaxis every 3 months. The patients were examined 6 and 12 months after treatment using the same parameters as used at baseline.The data from the examinations demonstrated that subgingival scaling is an effective measure in the treatment of periodontal disease. Both in terms of average gingivitis resolution and average probing depth reduction, non‐surgical therapy appeared to be equally effective as a surgical approach to treatment. It was also observed, however, that following non‐surgical treatment, a larger number of sites with pockets exceeding 6 mm remained than following surgical therapy. Most of these deep pockets in non‐surgically treated quadrants bled on probing to the base of the pocket. In addition, the subgingival microbiola of such sites were found to harbor more than 20% spirochetes and motile rods.The present investigation also demonstrated that granulation tissue removal in conjunction with flap surgery is not a critical measure for the establishment of conditions which are conducive for proper healing of the periodontal tissues.No attempts were made in the present study to assess the effect of treatment in furcation areas. This means that conclusions drawn from the results obtained are valid only for tooth surfaces devoid of fur

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1985.tb00928.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractThe purpose of the study was to examine whether any combination of vertical overbite (OB) and horizontal overjet (OJ) may be more favourable than others to dental health in anterior segments. The study group consisted of 74 females and 70 males. The participants were 15‐years‐old and had 6 anterior teeth in both jaws. The following parameters were assessed: plaque index, gingival index, probing depth, space index, filled surfaces, the number of non‐aligned proximal tooth surfaces (NONAS) and the OB/OJ ratio. The results demonstrated that participants with a relatively high OB/OJ ratio (OB/OJ 1.21) had a more favourable periodontal condition than participants with lower ratios. This was so in both sexes and both jaws. The OB/OJ ratio had little relation to the prevalence of filled sur

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1985.tb00929.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractA maxillary central incisor in a 55‐year‐old Caucasian female was extracted in modified block as part of a histologic study of gingival responses to subgingival crown placement. The facial portion of this block showed preclinical pocket depth of 1.0 mm with moderate gingival inflammation. The block was extracted 2 weeks after crown placement and prepared for histologic evaluation. Histologic responses to subgingival crown placement were, among others: gingival recession (1.0 mm), reformation of crevicular depth (0.7 mm) and remodelling of the gingival and periodontal attachment apparatus. Histologic evaluations of the gingival unit using cellular and connective tissue stains revealed an area of root resorption immediately apical to the junctional epithelium at a portion of the facial surface. Root resorption had progressed into demin. Gingival connective tissue abutted the dentinal surface. Collagen stains showed the presence of tufts of collagen fibrils which appeared to arise from the dentin. These fibrillar elements seemed to splice with collagen fibrils found in the gingival connective tissue. The specimen thus suggests the possibility of a fiber linkage attachment involving exposed dentinal fibers as part of gingival repair following inj

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1985.tb00930.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

摘要:

AbstractThe present study was designed to investigate the relationship between large open class II carious lesions and loss of periodontal attachment in 224 extracted teeth. Each tooth had a carious and a sound approximal surface. The teeth were divided into 4 groups: upper premolars. upper molars, lower premolars and lower molars each consisting of 56 teeth. Within each group, the carious lesions were divided equally between the mesial and distal surfaces. The teeth were stained and loss of attachment was measured under a stereomicroscope fitted with an ocularmicrometer. The difference in loss of attachment between carious (0.79±0.05 mm)and sound (0.76±0.04 mm) surfaces was not statistically significant. Loss of attachment was greater on the carious surface of 98 teeth, equal to in 40 teeth and Jess in 86 teeth than the sound surface. Mesial and distal surfaces with and without carious lesions exhibited essentially the same degree of loss of periodontal support. Upper molars and lower premolars tended towards more loss of attachment when compared with upper premolars and lower molars. The results indicate that large open class II carious lesions cannot be regarded as an important factor in the progression of attachment los

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1985.tb00931.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY

ISSN:0303-6979    

DOI:10.1111/j.1600-051X.1985.tb00932.x

出版商:Blackwell Publishing Ltd    

年代:1985

数据来源: WILEY