Factors affecting peri-implant bone loss: a post-five-year retrospective study.

INTRODUCTION: Although peri-implant bone loss is one of the parameters included in the criteria for determining implant success, its prevention is of vital importance. The goal of this article is to assess the factors that affect peri-implant bone loss. MATERIAL AND METHODS: An observational, longitudinal, retrospective study was conducted in 148 partially edentulous patients rehabilitated with implants and with a follow-up period of 5 years or more. A total of 585 implants were included in the study. Radiographic peri-implant bone loss was compared with radiographic periodontal bone loss, and other characteristics such as prosthesis design, hygiene, and implant size were studied as potential peri-implant bone loss modification factors. RESULTS: In the univariate analysis, a statistically significant relationship between peri-implant bone loss and gender (P < 0.05), implant system (P < 0.01), reason for extraction (P < 0.05), splinting (P < 0.0001), and distance between the implant platform and the horizontal component of the prosthesis (P < 0.0001) were observed. In multivariate analysis, the relationship between this peri-implant loss and gender (P < 0.05), implant system (P < 0.05), splinting (P < 0.001), and the aforementioned distance (P < 0.01) remains. CONCLUSIONS: The distance implant platform-horizontal component of the prosthesis has the greatest effect on peri-implant bone loss This distance must be >3.3 mm and <6 mm, above this range, it no longer influences in peri-implant bone loss and favors the appearance of embrasures and the buildup of bacterial plaque.

Histopathological findings in oral lichen planus and their correlationwith the clinical manifestations

Objectives: To highlight the most characteristic histopathological findings of oral lichen planus and their correlationwith the clinical manifestations and forms.Study design: We performed a retrospective study of 50 biopsied and diagnosed cases of oral lichen planus obtainedover a period of 11 years, spanning from May 1998 to April 2009. We analyzed the age and sex of thepatient, type of lichen planus, location and different histopathological findings, comparing them with the clinicallesions.Results: Seventy eight percent of the patients are female and 22% are male, with an average age of 56.06 years forboth sexes. The most frequent clinical form is reticular, present in 78% of the cases, and the most common locationis the buccal mucosa, present in 70% of the patients. Hydropic degeneration of the basal layer and lymphocyticinfiltration in the subepithelial layer are observed in the entire sample. Signs of atypia were identified in 4% of thecases, but without dysplasic features. Other common histological findings were the presence of necrotic keratinocytes(92%), hyperplasia (54%), hyperkeratosis (66%), acanthosis (48%), and less frequently, serrated ridges (30%)and the presence plasma cells (26%) (AU)

Correlation between clinical and pathologic diagnosis in oral leukoplakia in 54 patients

The main aim of this study was to establish a correlation between the clinical and pathologic diagnosis of oralleukoplakia with a particular focus on epithelial dysplasia. We reviewed the medical records of 54 patients with a clinical and histologic diagnosis of oral leukoplakia who were seen at our center between 2002 and 2008. We found that the disease was more common in men (59.3%) than in women and we also detected a significantly greater prevalence of alcohol and tobacco consumption in men. The mean age of the patients was 62.57 years. Three patients had been histologically diagnosed with invasive cancer and 4 with carcinoma in situ. The most commonlesion site for leukoplakias with severe dysplasia and invasive carcinoma was the lateral aspect of the tongue, the floor of the mouth, and the gums. It is therefore essential to include these sites in the clinical examination to aidearly diagnosis. A higher degree of dysplasia should be suspected in non-homogeneous leukoplakias. While dysplasiais associated with a greater risk of malignant transformation, it is also important to monitor leukoplakias without dysplastic features as they can occasionally be the site of carcinoma (AU)

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Correlation between clinical and pathologic diagnosis in oral leukoplakia in 54 patients.

The main aim of this study was to establish a correlation between the clinical and pathologic diagnosis of oral leukoplakia with a particular focus on epithelial dysplasia. We reviewed the medical records of 54 patients with a clinical and histologic diagnosis of oral leukoplakia who were seen at our center between 2002 and 2008. We found that the disease was more common in men (59.3%) than in women and we also detected a significantly greater prevalence of alcohol and tobacco consumption in men. The mean age of the patients was 62.57 years. Three patients had been histologically diagnosed with invasive cancer and 4 with carcinoma in situ. The most common lesion site for leukoplakias with severe dysplasia and invasive carcinoma was the lateral aspect of the tongue, the floor of the mouth, and the gums. It is therefore essential to include these sites in the clinical examination to aid early diagnosis. A higher degree of dysplasia should be suspected in non-homogeneous leukoplakias. While dysplasia is associated with a greater risk of malignant transformation, it is also important to monitor leukoplakias without dysplastic features as they can occasionally be the site of carcinoma.