Sedat Çetiner

Patterns of third molar impaction in a group of volunteers in Turkey.

Abstract.The aim of this study was to investigate the different variables in mesio-vertically positioned impacted or erupted third molars in a group of volunteers in Turkey to determine the angular changes and levels of eruption radiographically using standardised panoramic radiographs. There were 213 volunteers with impacted and erupted third molars included in this study, most of whom were dental students. Standardised panoramic radiographs were taken from all the volunteers. The radiographic parameters included angulation of tooth, level of eruption, development of root, mesiodistal crown width, retromolar space, and gonial angle. Statistical analysis was done using the t-test for independent groups. It was found that the mesiodistal angulation of third molars was significantly greater while the retromolar space of third molars was significantly smaller in the impacted group (P<0.05). There was also a significant difference in retromolar space/third molar crown width ratio (P<0.05).

Efficacy of preemptive lornoxicam on postoperative analgesia after surgical removal of mandibular third molars.

OBJECTIVE Pain is the most encountered complication following third molar surgery. Although nonsteroidal anti-inflammatory drugs are often used for pain control, the effect of preemptive lornoxicam has not been detailed. We compare the analgesic efficacy of preemptive lornoxicam versus postoperative lornoxicam. STUDY DESIGN Forty-three participants aged 18 to 33 years who had bilateral, symmetrical third molars were included in this double-blind, randomized, placebo-controlled study. All participants took part in each of the 2 groups for a 1-month interval (crossover design). Group Pre received lornoxicam 8 mg intravenously 25 minutes before surgery and 2 mL serum saline postoperatively. Group Post was given the opposite protocol. Pain was evaluated by visual analog scale in the first 12 hours. RESULTS We observed statistically significant differences in the reduction of the pain level in group Pre (P < .05). These participants felt less pain in the first 5 postoperative hours and needed fewer analgesics in the first 12 postoperative hours. CONCLUSIONS Preemptive lornoxicam is effective for postoperative pain control.

Histopathological features of bisphosphonates related osteonecrosis of the jaw in rats with and without vitamin d supplementation

OBJECTIVE Aim of this study was to investigate the effect of vitamin-D3 on the osteonecrosis of bone that was induced after tooth extraction was conducted on rats that were given zoledronic acid (Z.A). MATERIAL AND METHODS Animals were divided into four groups. Two of the experimental groups were divided into two subgroups, third study group was not divided into subgroups, and control group was divided into three subgroups. Z.A was administered twice per week over the course of 7 weeks, dexamethasone was administered twice a week during the 5th-6th-7th weeks to all groups. Dental extraction was performed by drilling around the tooth at 7th week. In study-group-1; vitamin-D was administered twice per week during the 5th-6th-7th weeks. In study-group 2; vitamin-D was administered twice per week during the 8th-9th-10th weeks. In study-group-3; vitamin-D was administered twice per week during the 15th-16th-17th weeks. The animals were sacrificed at 10th-15th-17th weeks, and histologic samples were taken. RESULTS Postoperative-15-group had a lower osteoblast number, which was statistically significant as compared to preoperative-15 and control-15-group. Control-10-group showed significantly lower osteoclast number in comparison to preoperative-10 and postoperative-10-group. Osteoclast number was significantly higher in the osteonecrosis-17-group as compared to control-17-group. Preoperative-10-group showed significantly higher inflammation in comparison to control-10-group. Postoperative-15-group had a lower histologic osteonecrosis, which was statistically significant as compared to the control-15-group. Macroscopic osteonecrosis was significantly higher in the control-17-group in comparison to the osteonecrosis-17-group. CONCLUSIONS We concluded that there are some proofs for the treatment of BRONJ with systemic using of vitamin-D.

Biomechanical effects of implant number and diameter on stress distributions in maxillary implant-supported overdentures

Statement of problem. Implant‐supported overdentures (ISOs) are considered a good alternative to conventional removable dentures. However, varying rates of failure have been reported in some clinical studies. Excessive stress on surrounding tissues is one of the possible causes of implant failure. As stress is transmitted to the bone through the implant, careful planning, correct number of implants, and implant positioning are keys to ensuring appropriate stress distribution. However, research of the optimal number of implants necessary to support a maxillary ISO is insufficient. Purpose. The purpose of this in vitro finite element study was to determine the optimal implant location, number, and diameter to support a maxillary ISO. Material and methods. Three‐dimensional models of an atrophic maxilla, dental implants, and ball attachments were modeled, and different loading conditions were applied to simulate realistic conditions. Six models with different numbers and diameters of implants, including mini‐dental implants and differently located implants, were formed, and stress values were compared by implementing a finite element analysis. Results. The study showed that, as the implant number increased, decreased stress values were observed in peri‐implant bone and implants in the maxillary ISO prosthesis. However, changes in implant diameter had no significant effect on stresses. Conclusions. Increasing the implant diameter was not advantageous; the use of mini‐dental implants may be a viable alternative method. However, using 4 implants for maxillary ISOs is indicated.

NASAL FLOOR AUGMENTATION AND SIMULTANEOUS DENTAL IMPLANT PLACEMENT: A CASE REPORT

INTRODUCTION:The rehabilitation of the severely atrophic edentulous maxilla is a challenging issue for dental practitioners. Nasal floor augmentation (NFA) is a method for augmentation of anterior maxilla. We represent a case of dental implant placement in conjunction with nasal floor augmentation procedure. CASE REPORT: In this case report, a 63-year-old male patient with atrophic maxilla was treated with NFA procedure and simultaneously placed 4 dental implants. Implant supported removable prosthesis were applied 5 months after the implant placement. The healing period was uneventful. There were no signs of any complications at the 1 year follow up. RESULTS: Maxillary sinus augmentation is a method used to achieve sufficient bone height for posterior maxillary implant placement and has proved highly successful. Nasal floor elevation is a very similar procedure and might be a preferred treatment modality for placing dental implants to the anterior maxilla that is limited by nasal floor elevation and bone grafting of nasal floor with simultaneously implant placement can be served as a feasible option for treatment of edentelous atrophic premaxilla with dental implants. In this case report, the patient was satisfied with the functional and esthetic results of his treatment. BURUN TABANI OGMENTASYONU ILE EŞ ZAMANLI DENTAL IMPLANT UYGULANMASI: BIR OLGU SUNUMU OZET GIRIŞ: Atrofik dissiz maksillanin protetik olarak tedavi edilebilmesi dis hekimleri acisindan her donem zor bir uygulama olmustur. Burun tabani ogmentasyonu (BTO) maksiller on bolgede dental implant uygulanmasi amaciyla uygulanan bir tedavi metodudur. Bu olgu sunumunda burun tabani ogmentasyonu ile es zamanli dental implant uygulanmasi rapor edilmistir. OLGU SUNUMU: 63 yasindaki erkek hasta klinigimize, atrofik ust cene nedeniyle hareketli protezini kullanmakta zorluk cektigi sikayetiyle basvurmustur. Yapilan klinik ve radyolojik muayeneler sonucu maksilla on bolgeye BTO ile es zamanli olarak 4 adet dental implant yerlestirilmis ve 5 ay iyilesme donemi ardindan implant destekli hareketli protez uygulamasi yapilmistir. SONUC: Maksiller sinus tabani ogmentasyonu, posterior maksillada yillardir guvenle uygulanan bir tedavi metodudur. Sinus yukseltme islemine oldukca benzerlik gosteren BTO, atrofik maksilla on bolgeye es zamanli dental implant uygulanabilmesi amaciyla tercih edilebilecek bir yontem olarak on plana cikmaktadir. Bu olgu sunumunda hasta yapilan BTO sonrasinda yapilan protezin fonksiyon ve estetiginden oldukca memnun olmustur.