DFT-derived reactive potentials for the simulation of activated processes: the case of CdTe and CdTe:S.

We introduce a new ab initio derived reactive potential for the simulation of CdTe within density functional theory (DFT) and apply it to calculate both static and dynamical properties of a number of systems (bulk solid, defective structures, liquid, surfaces) at finite temperature. In particular, we also consider cases with low sulfur concentration (CdTe:S). The analysis of DFT and classical molecular dynamics (MD) simulations performed with the same protocol leads to stringent performance tests and to a detailed comparison of the two schemes.

Implant placement in fresh extraction sockets and simultaneous osteotome sinus floor elevation: a case series.

The purpose of this study was to evaluate the clinical success of implants placed in fresh extraction sockets with simultaneous maxillary sinus floor elevation using the osteotome technique. Twelve patients were included. All the patients required the extraction of a maxillary premolar--close to the maxillary sinus--and were scheduled for immediate implant placement.

Effects of CO2 laser treatment on fibroblast attachment to root surfaces. A scanning electron microscopy analysis.

Background: The aim of this study was to analyze the CO2 laser effects on root surfaces affected by periodontal disease in comparison to scaling and root planing for fibroblast attachment.

Methods: Thirty single-rooted human teeth extracted because of advanced periodontal disease were included in this study. A total of 60 specimens, obtained from all selected teeth, were randomly assigned to 3 groups: 1) control (untreated); 2) hand scaling and root planing (SRP); or 3) laser (CO2 defocused pulsed) and ultrasonic scaling.

Longitudinal study of dental implants in a periodontally compromised population.

Background: The purpose of this longitudinal study was to determine the clinical status and the composition of the subgingival microbiota of dental implants and natural teeth in patients with a history of periodontitis.

Methods: Twenty-five partially edentulous patients treated for moderate to advanced adult periodontitis and having a total of 42 implants participated in this 3-year study. The assessment of clinical status was done 1, 2, and 3 years after prosthetic loading (T1, T2, and T3, respectively).

A clinical comparison of the efficacy and efficiency of two professional prophylaxis procedures in orthodontic patients.

This study compared the efficacy and efficiency of two professional prophylaxis procedures in orthodontic patients performing different oral hygiene regimens: the air powder polishing system (APP), and the rubber cup and pumice (RCP) technique. Sixty-two patients were divided into two groups: group I included 40 subjects who did not use any chlorhexidine mouthwash and group II comprised 22 subjects who regularly rinsed with a chlorhexidine mouthwash (at a 0.12 per cent concentration) and showed increased tooth staining.

Microbiotica associated with refractory periodontis. Prevalence and antibiotic susceptibility.

Background: The aim of the present study was to analyze the composition of subgingival microflora in patients with refractory periodontitis and to evaluate the antimicrobial sensitivity of isolated periodontopathic microorganisms to different antibiotics.

Methods: Eleven subjects with a mean age of 46.4 years were selected for the present study.

Periodontal status and subgingival microbiota of insulin-dependent juvenile diabetics: a 3-year longitudinal study.

This study examined for 3 years the changes in periodontal status and the possible correlations with selected subgingival microbiota and diabetic conditions in a group of 16 insulin-dependent diabetes mellitus (IDDM, JD) patients as compared with their 16 healthy cohabiting siblings (HS). JD patients were monitored every 3 months for levels of glycosylated hemoglobin (HbA1C). Clinical and microbiological parameters were measured 6 weeks before drawing blood to determine levels of HbA1C.

Periodontal status and selected cultivable anaerobic microflora of insulin-dependent juvenile diabetics.

The periodontal status and subgingival microflora of insulin-dependent juvenile diabetic (JD) patients (n = 16, mean age = 11.3) were compared with that of their non-diabetic cohabiting healthy siblings (HS, n = 16, mean age = 13.2).

Antimicrobial susceptibility of periodontopathic bacteria associated with failing implants.

The aim of this study was to examine the subgingival microflora associated with failing implants, and to determine their susceptibility to commonly used antibiotics in periodontal therapy and dental practice. Thirteen partially edentulous patients with 19 failing implants were selected. Clinical examination included probing depth, attachment level, gingival index, plaque index, and radiographic analyses.

[Guided regeneration of the periodontal tissues with resorbable and nonresorbable membranes. II. Microbiological evaluation].

The present experimental study has been undertaken in order to analyze the influence of bacterial recolonization on periodontal wound healing following guided tissue regeneration therapy in humans. Two different surgical techniques has been carried out: one using a non absorbable membrane and the other a absorbable one. Microbiological data indicate no statistically significant difference between the techniques employed.

[Guided regeneration of the periodontal tissues with resorbable and nonresorbale membranes. I. Clinical evaluation].

The present experimental study has been undertaken in order to analyse clinically, in humans, the regeneration of periodontal tissue following two different surgical techniques of guided tissue regeneration therapy using a resorbable and a nonresorbable membrane. Clinical results have demonstrated no statistically significant difference between the techniques employed, both of the showing a favourable outcome if perfect plaque control in the postoperative period is performed.

[Oral localization of condyloma acuminata: clinical case].

A case report on oral cavity location of condyloma acuminatum.

[Bacterial recolonization in the guided regeneration of the inter-radicular periodontal tissues].

The present experimental study has been undertaken in order to analyse clinically and microbiologically the formation of new periodontal attachment in class II furcation lesions in mandibular molars, comparing healing after surgical conventional therapy and after guided periodontal tissue regeneration technique using non-resorbable membranes and evaluating at the same time, with cultural anaerobic technique, the influence on healing of the bacterial recolonization of some periodontally pathogenic species. Clinical results have demonstrated that, after therapy, may occur a certain discrepancy between soft and hard tissue regeneration and that the bone tissue shows a different pattern of apposition in the horizontal and vertical direction. Microbiological data have underlined the significance of surgical instrumentation in the guided inter-radicular periodontal tissue regeneration and have confirmed the necessity of maintaining the healing sites free from the main periodontal pathogens.

[Current trends in therapy of periodontal disease].

A comprehensive literature review on biological principles guiding present research lines of Periodontal Therapy has been carried out, focusing mainly on the repair potential of the periodontal tissues.

[Periodontal osseous surgery: osteoplasty and osteotomy].

Elimination of the periodontal pocket is a prime objective of periodontal therapy. Normally the gingiva is consistent with the underlying bone, and aberration in gingival form can be corrected by gingivectomy or gingivoplasty if the gingiva is supported by good bony architecture. If periodontitis has caused marginal irregularities or septal deformities the complete elimination of the periodontal pocket is done by osteoplasty or osteoectomy.