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Biomedical subjects

P Bercy

Publications and source records attributed to P Bercy.

At least 37 records · Page 2Linked to original sources
PubMed1991

[A case of oral rehabilitation].

The success of the treatment of patients suffering from severe chronic periodontitis urges a tight complicity between dentist and patient. This article underlines the importance and the sequence of the treatment: medical anamnesis, initial periodontal examination, motivation of the patient for better oral hygiene, initial non-surgical treatment, follow-up of the healing, pre-prosthetic surgery, provisory and definitive prosthetic treatment, maintenance. It shows the results, 3 years after the treatment of a female patient, suffering from periodontitis in a terminal stage.

Dentist-Patient Relations↗
PubMed1990

[Criteria for choice of an alloy for dental amalgams].

Dental amalgam is still the safest and the most utilized posterior restorative material. The amalgam weakness is the marginal leakage of the filling. This defect is the main source of failure. Creep and corrosion are the most important factors in the marginal destruction mechanism. It's suitable to determine material properties before oral use. Electrochemical methods i.e. corrosion potentials and currents are mainly utilized. In vivo techniques have been developed. Those techniques give us interesting informations on amalgam buccal behaviour in course of time. Amalgam choice is very important: the best one is a High Copper alloy with high corrosion resistance and low creep.

Copper↗
PubMed1990

[Comparative effectiveness of the Interplak electric rotary toothbrush].

The purpose of this study was to compare the Interplak rotary electric toothbrush with conventional toothbrushing for its effectiveness in controlling supragingival plaque and gingival inflammation. Twenty subjects, received the same hygiene instructions, were selected and divided into two equal groups. One group used conventional toothbrushing (Control group) and the other one used only the rotary electric toothbrush (Test group) for a 4 weeks study period. The plaque index (PLI), the plaque index limited on proximal sides (PPLI), the bleeding index (PBI) and the periodontal destruction index (PDI) were recorded at base line and after 4 weeks. Test group had significantly improved scores for PLI, PPLI and PBI. No differences were found in control group. These results indicate that the rotary electric toothbrush (Interplak is more effective for plaque removal and control of gingival inflammation that classic manual brushing.

Dental Plaque↗
PubMed1989

[Manual dexterity and acquisition of correct dental hygiene].

The aim of this study was to evaluate the relationship of normal dexterity and the ability to obtain correct dental hygiene. Manual dexterity level was determined by means of psychotechnical tests on 35 students. Plaque index was noted before oral hygiene instructions including tooth-brushing and flossing techniques according to BASS. The same index was noted 15 days after instructions. Statistical analysis of results showed no significant relationship between manual dexterity and plaque control efficiency.

Dental Devices, Home Care↗
PubMed1989

[Dental prophylaxis by the patient].

Conscientious self-application of oral hygiene procedures by the patient is related to the need to obtain and to keep plaque-free teeth. This need is aroused by pleasant aspects. One appointment is reserved to demonstrated proper plaque control techniques. Instruction on the correct brushing method is explained with the aid of demonstration models and afterwards in the mouth with the use of a hand mirror. It is necessary to confirm the effectiveness of the instructed method in plaque removal with each patient. We describe a modified BASS toothbrushing technique. Patients without periodontitis, for example in case of chronic gingivitis, are instructed for flossing. Patients with periodontitis receive instruction for use of interdental cleaning (floss and/or interproximal brushes). Patient motivation is repeated during treatment period, control routine visit and maintenance phase. At each visit, technique efficiency is controlled visually or by bleeding test and plaque control is corrected.

Dental Plaque↗
PubMed1989

HLA: a review of actual knowledge and perspectives in periodontology.

The Major Histocompatibility Complex is a relatively poorly explored research area among the various immunological aspects of periodontal diseases. After a recall of general concepts, the authors first describe the general HLA-pathology association and then, the reported HLA-periodontal disease associations. HLA theoretical potential interests are multiple. Typing results show, on one hand, no clear correlation with juvenile periodontitis (diminution of A 2, augmentation of A 9, A 28, Bw 15 and Bw 35) but on the other hand, a more constant correlation between HLA A 9 and rapidly progressive periodontitis. Besides, three resistance factors have been reported: A 10, B 5 and A 28.

Aggressive Periodontitis↗
PubMed1989

[Periodontal considerations related to extractions].

During any tooth extraction, the dentist has to think about healing problems in order to maintain as much bone as possible afterwards. Careful and well done extractions using classical techniques allow maximum bone preservation in normal cases. At minima alveolectomy techniques are a guarantee against tremendous bone loss. After healing and before prosthetic rehabilitation, crests must be checked and, if necessary, corrected by one of the several available techniques.

Alveolar Ridge Augmentation↗
PubMed1989

[The therapeutic effects of non-surgical technics applied in the treatment of periodontitis].

The aim of the present investigation was to study the non-surgical periodontal therapy efficiency. 126 patients were selected for this study. 20,052 sites were observed during 2 years. Patients were instructed in oral hygiene before treatment and, if necessary, during the study. All the sites were treated by scaling and root planing. The treatment was followed by a three months maintenance. The pockets were classified in three depth groups (less than 3, greater than 3 less than 7, greater than = 7 mm). At base line, male patients showed a greater deep pockets number. Probing pockets measurements were recorded 3, 12 and 24 months after treatment. The results showed, after three months, an important reduction of the pockets number (greater than 3 less than 7 and greater than = 7 mm). A smaller reduction was also observed after 12 and 24 months. During the last 21 months of this study, a therapeutic effect of the maintenance appeared more clearly when a correlation was made with the initial pocket number. The healing was not influenced by the initial pocket depth. Only incisors and canines deepest pockets showed a better healing. In the same way, molars and premolars proximal sides showed a better answer. This last observation is, maybe, the consequence of the frequent papillectomy performed around the posterior teeth. The differences between female and male patients or between the age groups were not significative. Nevertheless, the therapeutic effect of the maintenance seemed to be more effective with younger patients.

Adult↗
PubMed1989

[Infra-osseous pockets and filling technics].

It is showed that severe periodontal pockets can be treated with success by non-surgical techniques. Nevertheless, numerous reports have appeared in the periodontal literature regarding the use of allografts, xenografts and alloplastic implants. The most investigated Calcium Phosphate biomaterials are composed of either Hydroxyapatite or Tricalcium Phosphate. In a number of studies on the regenerative potential of the periodontal tissues following periodontal grafting surgery it has been shown that pocket depth decreased but no indication of new periodontal attachment or cementogenesis adjacent to the graft particles was demonstrated. The authors felt the material was a biocompatible "fill". Histologic observations were accomplished and regularly showed the presence of a long junctional epithelial adhesion.

Adult↗
PubMed1980

[Scanning electron microscopy of dental plaque and tartar on the surface of human cementum].

Supragingival plaque covering cementum, exposed through withdrawal of the epithelial attachment, presented the same bacterial polymorphism as nature dental plaque. Rounded, filamentous and rod-shaped organisms were observed. In some areas, the presence of extracellular material corresponded to plaque matrix. Corn cob configurations consisting of central filamentous bacteria associated with peripheral cocci were often seen in the supragingival plaque overlaying the cementum. The observation of cementum calculus allowed the differentiation of supragingival and subgingival calculus. The first consisted mostly of calcified dental plaque. The calcification started more often in the interbacterial matrix, but sometimes an initial calcification of the bacterial bodies was noted. Beside this calcified bacterial plaque, crystalline inorganic deposits devoid of micro-organisms were observed. The same differences were noted in subgingival calculus but the proportion was clearly reversed. Amicrobial crystalline deposits were more frequent and calcified bacteria were more uncommon.

Bacteria↗