جستجوی مقالات مرتبط با کلیدواژه "نخ بخیه" در نشریات گروه "پزشکی"

The tissue reaction to stitch strings used in the intraoral surgery that can aggravate inflammation is an important issue. This study aimed to compare the tissue reaction formed around three types of stitches, including Demesilk (Demetech corporation,USA) that is not produced inside the country, Pedsilk and Suture, which all are natural nonabsorbable, on rats.
In this experimental study, 12 male rats with an approximate weight of 250 g were selected and divided into two equal groups. After anesthesia, the back hair of the animals was shaved and all three types of stitch strings were used differently in each sample. The first type of stitch was Pedsilk, the second type Suture, and the third one was Demesilk. In certain days (the second and seventh days), one group of the rats were sacrificed with a certain amount of fatal ketamine and all three types of stitch strings were removed separately and transmitted to laboratory and compared regarding inflammation, granulation and fibrosis formation. The data were analyzed using the Friedman and Wilcoxon tests with the SPPS software.
Statistical assessment carried out in all three types showed a significant difference among the strings in most cases. The manner of Pedsilk and Demesilk with regard to inflammation was similar in which the possibility of inflammation increased as the time passed and this possibility decreased in the Suture. The manner of both Pedsilk and Demesilk regarding the granulation tissue was similar in which the possibility of the formation of the tissue did not have a remarkable decrease as the time passed. In Suture, this possibility decreased remarkably. The manner of all three strings, Suture, Pedsilk and Demesilk, increased significantly regarding fibrosis tissue formation as the time passed (P The common use of stitch strings in intraoral surgeries and the fact that a stitch string is considered as an external body in a wound zone increases the risk of infection and inflammation in Demesilk and Pedsilk, but this possibility decreases in the Suture type. As a result, after the surgery, the use of the Suture in covering the surgery zone is supposed to be the most important factor in amending the tissue and the success of the surgery.

Suture removal time is one of the most controversial issues after third molar surgery. The purpose of this study was to evaluate wound healings in relation with suture removal time after 5, 8, and 10 days following the third molar surgery. This clinical trial study with double blind method was conducted on 90 patients in need of third molar surgery. Patients were non-smokers and had no history of known systemic diseases. Sex and age range were similar in all study groups. The same suturing material as well as post surgery medications were used for all participants. Patients were then divided into 3 groups in order to have their suture removal at 5th (group A), 8th (group B), and 10th (group C) day following the surgery. Statistical analysis was conducted and Kruskal-Wallis and χ2 tests were used for analyzing group differences and significance level by evaluating wound tension, wound healing and inflammation status. Group A, was almost without wound tension or had just a negligible amount of tension. Group B had 33% and group C had 17% of this condition (P<0.01). Moderate to severe inflammation was measured 70% in group A, 23.3% in group B and 20% in group C (P<0.001). Wound healing was 83% in group A, 17% in group B and 10% in group C (P<0.001). Amount of tension in suture was 13.3% in group A, 70% in group B and 86.7% in group C (P<0.001). Based on the results of this study, it seems that time factor plays an important role in wound healing. This is true as long as the suture tension is not reduced. Therefore, 8 days after the surgery is the best time for sutures removal.

The use of cyanoacrylate tissue glue as an alternative to silk sutures has increased due to its various advantages. The purpose of this experimental study was to compare the clinical outcome of surgical crown lengthening using silk sutures and 2–ethyl–cyanoacrylate. Thirty-two individuals with no history of systemic diseases and good oral hygiene were selected from patients referred to the Department of Periodontics, School of Dentistry, Isfahan University of Medical Sciences. Following apically positioned flap surgery, the wounds were closed by silk sutures and 2–ethyl–cyanoacrylate in the control and experimental groups, respectively. Bleeding, pain and healing-time were evaluated 1, 2, 3, and 10 days postoperatively. Sign and Friedman tests were used for statistical analysis. A significant difference was observed in bleeding between the two groups at days 1 and 2 (P<0.01) but not days 3 and 10. In both groups, the bleeding index decreased significantly with time. Pain indices were significantly different between the two groups on the first and second days (P<0.01, P<0.05), but not the third and tenth days. Wound healing significantly improved in the test - as compared to the control group at day 10 (P<0.05). The two groups showed no significant difference in terms of infection at day 10. The use of cyanoacrylate in crown lengthening surgery can improve wound healing and reduce bleeding and pain, especially compared to suturing techniques. However, the differences between these two methods decrease with time.

This study was carried out in order to compare the oral mucosal reactions to silk and poly vinylidene fluoride (PVDF) suture materials in albino rabbit. 21 mature male albino rabbits were selected and under general and local anesthesia suture materials were placed randomly at right and left side of vestibular area of maxillary jaw. The animals were divided into 3 equal groups based on the time of suture removal (3, 5 and 7 days after suturing), and inflammatory reaction of the oral mucosal at sutured area was scored clinically and sutures were removed. The sutured areas in all of the animals were observed 14 days after suturing and the inflammatory reaction was scored again. Wilcoxon and Kruskal Wallis tests were used for data analysis. Results showed that in all intervals, inflammatory reactions to PVDF sutures were significantly milder comparing to silk sutures (P<0.05). Also, later suture removal increased the inflammatory reaction and healing decreased. It can be concluded that in oral surgeries PVDF sutures due to creating milder tissue reactions is preferable to silk suture.