جستجوی مقالات مرتبط با کلیدواژه "لثه" در نشریات گروه "پزشکی"

Pyogenic granuloma is a benign and non-neoplastic mucocutaneous lesion that has multiple causes and develops in response to local irritation, trauma, or hormonal changes during pregnancy. In the oral cavity, this lesion often involves the anterior of the maxillary gingiva, and rarely, the tongue, labial mucosa, and palatal mucosa are involved. The clinical appearance of the lesion was usually seen as a nodule with or without a base, with a smooth surface or lobulated surface. It is usually non-tender, but it can bleed on touch. This lesion may be seen in any size from a few millimeters up to several centimeters. It is more common in females. This case report presents a rare site of a pyogenic granuloma on the dorsal site of the tongue. Clinical symptoms, causes, differential diagnosis, histology of the pyogenic granuloma, and treatment were discussed in this case report.

 Soft tissue grafts are used around dental implants for different purposes. Autogenous soft tissue graft techniques have yielded favorable results. However, these techniques increase the duration of surgery and postoperative complications. Allogeneic and xenogeneic tissues have advantages over autogenous grafts. Numerous studies have reported successful treatment outcomes with acellular dermal matrix (ADM) as an alternative to autogenous soft tissue for treating mucogingival defects around dental implants. This study aimed to review various soft tissue techniques around dental implants.

 In this systematic review, a search was run in four databases, including PubMed, Scopus, Web of Science, and Cochrane until January 2020 with these key words: soft tissue augmentation, dental implants, keratinized gingiva and acellular dermal matrix.

 Autogenous connective tissue graft is the gold standard technique for increasing the thickness of soft tissue around dental implants. The use of allogeneic materials as an alternative to these tissues is associated with some advantages.

 ADM is a suitable alternative for autogenous connective tissue grafts to increase the thickness and width of keratinized tissue around dental implants.

Prior to crown lengthening surgery and/or restorative and prosthetic treatment, it is necessary to know the dimensions of the tooth biologic width. In different studies, the biologic width has been measured in different sites and teeth with a healthy periodontium. In this study, the biologic width was measured in different teeth of the mandibular and maxillary arches, and the effect of periodontal/gingival biotype on biologic width was evaluated.

This cross-sectional study was performed on 163 teeth in 12 subjects, including five males and seven females with an average age of 28 ± 4 years. After injecting the anesthetic agent, the dimensions of the biologic width were measured using a periodontal probe at six sites in all the existing teeth (except the third molars). Periodontal biotype was evaluated and categorized as thin or thick by observing transgingival shade of a probe. The data were analyzed with ANOVA and t-test using SPSS 19 (α = 0.05).

The average biologic widths in the molars, premolars, canines, and incisors were 1.90 ± 0.80, 1.72 ± 0.69, 155 ± 0.72, and 1.49±0.64, respectively. There was a significant relationship between the biologic width and the tooth type (p value = 0.000). However, there was no significant relationship between the biologic width and gingival biotype in six points and different sites of the mouth (p value > 0.08).

The biologic width dimension varies in different tooth types. The periodontal biotype has no effect on the biologic width dimension.

Nowadays the necessity of the existence of a certain width of keratinized gingiva is emphasized upon to maintain periodontal health and prevent soft tissue recession around teeth and dental implants. This study was carried out to compare two gingival graft procedures including connective tissue graft and graft with a combination of collagen sponge with platelet-rich plasma and platelet-rich fibrin to increase the width and thickness of keratinized gingiva.

In this clinical trial 8 patients with bilateral inadequate width (≤ 2 mm) and thickness (≤ 1 mm) of keratinized gingiva on the buccal aspect of single-rooted teeth were selected. On the control side، connective tissue graft and on the test side، graft by combination of stypro+PRP+PRF were performed. After surgery، the measurements were repeated at 1، 2 and 3 months. Data was analyzed by Wilcoxon’s test to compare the 2 groups and Friedman’s test was used for comparisons within each group with SPSS 15 (α = 0. 05).

After 3 months there were no differences between test and control groups in relation to the width of keratinized (p value = 0. 317)، attached gingival (p value = 0. 527)، thickness of the graft (p value = 0. 05) and thickness of the keratinized layer (p value = 1).

It appears the new approach for gingival augmentation used in this study may be a proper substitute for autogenous gingival grafts.

Periodontium biotype has many variations among different people. It has been suggested that the variation in the periodontium biotype may be related to the shape and form of the crowns of the teeth. The aim of this investigation was to examine the forms of the crowns in the maxillary anterior segment and corresponding gingival characteristics among healthy young Iranian subjects.

For this cross-sectional study 200 individual (100 male & 100 female) with average age of 26.5 ± 7.29 with healthy periodontium were chosen from dental students of Islamic Azad University. The gingival angle, height of interdental papilla, crown width and crown height of maxillary anterior teeth were measured by a digital caliper on a diagnostic stone cast. Also marginal gingiva’s thickness, probing depth and width of keratinized gingival was assessed clinically by a William’s probe on each individual. Binary logistic regression method was used for statistical analysis.

In central teeth (11-21) gingival thickness had a significant correlation with amount of keratinized gingiva and probing depth. In lateral teeth (12-22) gingival thickness had significant correlation with amount of keratinized gingiva, probing depth and crown width. In canine teeth (13-23) gingival thickness had significant correlation with amount of keratinized gingiva, probing depth, crown’s height, papilla’s height and gingival angle. There was no statistical relation between crown’s form and gingival thickness.

Based on the findings, crown form had no relation with the gingival thickness but in each type of tooth gingival thickness was related to different factors.

Currently, hyaluronic acid is used to reduce the side effects of periodontal surgery including hemorrhage, inflammation and pain and accelerate the healing process of the wound. Oral or local application of Ghee can be relatively effective in enhancement of the wound healing process.The present study was performed with the aim of comparing the effects of hyaluronic acid with curcuma longa- ghee on the healing process of gingival tissue following ginivectomy.In a double blind controlled randomized experimental study, 5 male beagle dogs, 8 to months old (approximately 5 kg), with intact teeth and clinical signs of gingivitis with similar Gingival Index (GI) and no periodontitis, were used. In each Jaw, two regions were randomly selected as control and six regions as test groups. Following gingivectomy periodontal packs were used in the control groups and three materials including curcuma longa-ghee with two different ratios (material A and material B) and hyaluronic acid (material C) were used in the test groups Histological changes were evaluated and 7 days after gingivectomy in order to assess the healing process. Data were analyzed using Kruskal Wallis test.Significant statistical differences were found in all parameters for the three materials used in experimental groups compared with control groups. On the fourth day, the inflammatory parameters decreased and repairing parameters increased remarkably in the regions with materials A and B compared to those with material C, while the difference in the degree of epithelialization was statistically meaningful (p = 0.00). On the seventh day, the inflammatory parameters decreased and repairing parameters increased remarkably in the material B regions compared to the regions on which materials A and C were placed. According to the above results, curcuma longa-ghee is more effective than hyaluronic acid in repairing process and reduction of the inflammation. Therefore, it can be considered as a suitable substitute for accelerating of healing process after periodontal surgery.