INTRODUCTION: Preparation of the implant osteotomy has been classically performed using drills of various shapes to conform the site to the implant's geometry. Drilling procedures may cause not only mechanical trauma to the bone but also heat-induced bone necrosis, thus representing a significant risk for failed osseointegration. As an alternative single drilling osteotomy is a technique that allows effective bone cutting with minimally traumatic procedures and less heat generation. OBJECTIVES: Evaluation of single drilling implant site preparation in affecting implant stability and crestal bone loss that takes place around the implant. MATERIALS AND METHODS: The study was conducted on thirteen patients having missing posterior mandibular teeth indicated for implant restoration. All implants were placed using single drilling osteotomy. After 3 months, final crowns were delivered. All implants were followed for 6 months. Clinically, each patient was evaluated for pain, swelling and stability of the implant. Radiographically, cone beam computed tomography (CBCT) was used for the assessment of marginal bone level and bone density. RESULTS: There was a significant increase in bone density from immediate postoperative to the end of the 6 months. The mean of marginal bone level from immediately post-operative to the 3rd month was significant and from immediate to 6th month was significant. One case displayed swelling in the first week and the implant was removed (failure case) due to lack of oral hygiene maintenance by the patient. CONCLUSIONS: Single drilling osteotomy was a successful treatment procedure, with satisfactory clinical outcomes, and a low incidence of complications.

INTRODUCTION:Osseointegration, defined as a direct structural and functional connection between ordered living bone and the surface of a load-carrying implant, is critical for implant stability and is considered a prerequisite for implant loading and long-term clinical success of endosseous dental implants. Primary stability following implant placement is essential for osseointegration and is mainly influenced by the following main factors density, quantity of bone at the implant site and implant design. Moreover, implant surface topography is a key factor in the achievement of osseointegration, the most common modification of implant topography is surface roughness. This is achieved by acid etching, sandblasting, or oxidization. OBJECTIVES: To evaluate the effectiveness of using MPM, compared to the use of bone graft alone, to assess the exact effect of each in enhancing the osteogenic differentiation and bone formation. MATERIALS AND METHODS: This clinical study was performed on a total of eleven patients (14 implants), with missing mandibular posterior teeth indicated for implant restoration. Implants were placed according to manufacturer's instructions. After 3 months, final crowns were delivered. All implants were followed up for 6 months. Clinically, each patient was evaluated for pain, swelling and stability of the implant. Radiographically, cone beam computed tomography (CBCT) was used for the assessment of marginal bone level and bone density. RESULTS: There was a significant increase in bone density from the preoperative phase to the end of the 6 months. The mean of marginal bone level loss from the preoperative period to the 3rd month was significant as well as from the preoperative period to the 6th month. One case displayed periimplantitis and mobility in the first month of follow up and hence it was removed and regarded as failure case. CONCLUSIONS: Self osteomizing implants are a good choice for replacing missing mandibular posterior teeth with satisfactory clinical outcomes and a low incidence of complications.

INTRODUCTION: Dentoalveolar fractures of children are a common manifestation of trauma, but it is different from trauma in adults. There are several points of differentiation between the two; the most important one is growth. OBJECTIVES: To evaluate the efficacy of a new fiber glass splint for fixation of dentoalveolar fractures in children. MATERIALS AND METHODS:This was a prospective clinical trial. Ten children with dentoalveolar fractures were selected from the outpatient clinic of The Oral and Maxillofacial Surgery, Faculty of dentistry, Alexandria University. The patients were treated with closed reduction and fixation with new splint (F-Splint Aid). Clinical and radiographic evaluation were done up to 4 months post operatively for postoperative swelling, Inflammation or infection and stability of fracture segment. The bone density was measured and compared at the first and fourth months' post operatively using cone beam software. RESULTS: There was a decrease of pain from time of treatment to the seventh day after treatment which was statistically significant, the subsidence of edema and decrease of mobility were also statistically significant, and there was an increase in the mean radiographic bone density from 1month to 4months post operatively which were found to be statistically significant (T value=5.639, P value<0.001). CONCLUSIONS: It was concluded that the use of F. Splint. Aid in the treatment of dentoalveolar fracture of children is cheap, hygienic, esthetic, and non-invasive technique.

Implants modified thread geometry mandibular premolar region.