Sercan Küçükkurt

Biomechanical comparison of sinus floor elevation and alternative treatment methods for dental implant placement

Abstract Objective: In this study, we compared the success of sinus lifting and alternative treatment methods in applying dental implants in cases lacking adequate bone due to pneumatization of the maxillary sinus. Methods: In a computer environment, 3D models were created using computerized tomography data from a patient. Additionally, implants and abutments were scanned at the macroscopic level, and the resulting images were transferred to the 3D models. Five different models were examined: a control model, lateral sinus lifting (LSL), short dental implant placement (SIP), tilted implant placement (TIP) and distal prosthetic cantilever (DC) use. Vertical and oblique forces were applied in each model. The compression, tension and von Mises stresses in each model were analyzed by implementing a finite element analysis method. Results: In our study, the LSL method was observed to be the closest to the control model. The TIP model showed high stress values under conditions of oblique forces but showed successful results under conditions of vertical forces, and the opposite results were observed in the SIP model. The DC model provided the least successful results among all models. Conclusions: Based on the results of this study, the LSL method should be the first choice among treatment options. Considering its successful results under conditions of oblique forces, the SIP method may be preferable to the TIP method. In contrast, every effort should be made to avoid the use of DCs.

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.

Familial florid osseous dysplasia: a report with review of the literature

There are three types of osseous dysplasia: periapical cemental dysplasia (PCD), focal cemento-osseous dysplasia (FCD) and florid osseous dysplasia (FOD). While PCD is often observed in mandibular anterior teeth, FCD mainly affects mandibular posterior teeth. FOD, on the other hand, commonly involves both jaws. FOD is a type of sclerosing disease that is characterised by intense opaque masses and many areas with different densities. Genetic heritance of FOD is unusual, with only a few reported cases. We describe a case of FOD that affected three family members, discuss its clinical, radiological and histological characteristics, and review the literature.

Solitary plasmacytoma of the mandible: report of two cases

Plasma cell neoplasms (plasmacytoma) are discrete, solitary masses of lymphoid neoplastic proliferations of B cells. Plasmacytomas comprise three groups: multiple myeloma, solitary plasmacytoma (SP) and extramedullary plasmacytoma. SP originates as a clone of transformed malignant plasma cells in the bone marrow. SP of the jaw is a rare condition; therefore diagnosis is quite difficult and often results in misdiagnosis. MM is a lymphoproliferative disease the prognosis of which is worse than SP. SP can progress to MM in a few months to years after diagnosis. In this regard, early diagnosis of the disease is of utmost importance. This article presents two cases of SP diagnosed in the mandible and documented with clinical, radiographic and histological findings.

Pilonidal sinus of the chin: mistreated as a dental fistula

Pilonidal sinus is a chronic inflammatory condition associated with penetration of hair particles into the skin. It is rare in the chin area and, to our knowledge, there is only one such reported case. A 56-year-old man was previously admitted to a private clinic, with a hard mass on his anterior buccal sulcus. Three of the patients teeth were extracted as the swelling was thought to be associated with a dental infection. Because the fistula did not resolve, the patient was referred to our department. Following radiological and clinical examinations, the hard mass was reached intraorally and hair shafts were seen inside it. The area was closed primarily after cleaning the inflammatory tissues and the hairs. The recovery period was uneventful. In this case report, we present a pilonidal sinus encountered in the chin area, the wrong treatment initially given to the patient and the subsequent treatment carried out by us.

Uncommon benign tumour of the skin: infraorbital pilomatricoma

Pilomatricoma is a relatively rare tumour of the skin derived from primitive basal cells of epidermis that differentiate into hair matrix cells. It comprises approximately 1% of all benign skin tumours. The most common sites for pilomatricomas are the head, neck and upper extremities. A 44-year-old woman, admitted to our department, underwent an orthopantomography examination, which revealed a well-circumscribed 1.6×1.4 mm radiopaque mass superimposed between the medial wall of the right maxillary sinus and lateral wall of the nasal cavity. Clinically, it was firm and mobile, and remained attached to the underlying skin when palpated. A cone beam CT scan was performed to ascertain its location and anatomic relations. Subsequently, it was totally excised under local anaesthesia. Histopathological evaluation of the lesion reported it to be a pilomatricoma.

Peripheral osteoma in an unusual location on the mandible.

Osteoma is a benign, slow-growing, painless, discrete lesion which is characterised with the proliferation of a compact or cancellous bone. Osteomas are rare on the jaws. Lesions of the mandible developed most often in the condyle, angle and margin. Osteoma developed on the genial tubercle area had only been reported in one case. A 50-year-old female patient has been admitted to our department with the symptom of a hard mass under the chin area. In extra-oral and radiographic examinations, a 1×1 cm size, round, palpable, immobile, radiopaque mass has been determined on the genial tubercle area. The lesion has been completely removed under local anaesthesia by extra-oral approach. Her recovery period was uneventful. Osteoma diagnosis was confirmed with histopathological examination. There is no recurrence at 3-year follow-up. The purpose of this case report is to present a peripheral osteoma case that occurred in the genial tubercle area which is an unusual place.

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.