Immediate provisionalization using one-piece narrow diameter implants for restoration of edentulous narrow spaces: Case reports

The aim of this case study was to report the clinical outcome of immediate provisionalization using one-piece narrow diameter (3.0mm) implants in missing maxillary lateral or mandibular incisors. The present study included 36 patients who were treated with 62 one-piece narrow diameter implants. After implant placement, immediate provisional restorations were delivered. All implants showed favorable osseointegration and after progressive loading from 3 months to 9 months (average of 5 months), final restorations were completed without failure in all cases. A survival rate of 100 % (62 of 62) was observed up to 23 months of observation (average of 12.6 months).

The effect of using laser for ceramic bracket bonding of porcelain surfaces / 대한치과교정학회지

OBJECTIVE: The purpose of this study was to investigate the effect of using laser for ceramic bracket bonding of porcelain surfaces and to compare it with conventional treatment of porcelain surfaces. METHODS: Ninety feldspathic porcelain specimens were divided into 9 groups of 10, with each group having different surface treatments performed. Surface treatment groups were orthophosphoric acid, orthophosphoric acid with silane, hydrofluoric acid, hydrofluoric acid with silane, sandblasted, sandblasted with silane, laser etched, laser etched with silane, and glazed surface served as a control group. In the laser etched groups, the specimens were irradiated with 2-watt superpulse carbon dioxide (CO2) laser for 20 seconds. Ceramic brackets were bonded with light-cure composite resin and all specimens were stored in water at 37degrees C for 24 hours. Shear bond strength was determined in megapascals (MPa) by shear test at 1 mm/minute crosshead speed and the failure pattern was assessed. For statistical analysis, one-way ANOVA and tukey test were used. RESULTS: Statistical analysis showed significant differences between the groups. The HFA + S group showed the highest mean shear bond strength (13.92 +/- 1.94 MPa). This was followed by SB + S (10.16 +/- 1.27 MPa), HFA (10.09 +/- 1.07 MPa), L + S (8.25 +/- 1.24 MPa), L (7.86 +/- 0.96 MPa), OFS + S (7.22 +/- 1.09 MPa), SB (3.41 +/- 0.37 MPa), OFA (2.81 +/- 0.37 MPa), G (2,46 +/- 1.36 MPa). Bond failure patterns of HFA and silane groups, except L + S, were cohesive modes in porcelain while adhesive failure was observed in the control group and the rest of the groups. Conclusions : A 2-watt superpulse CO2 laser etching of porcelain surfaces can provide a satisfactory result for porcelain surface treatment for ceramic bracket bonding. Laser irradiation may be an alternative conditioning method for the treatment of porcelain surfaces.

Complications associated with dental implant surgery: Case report

According to the increase in use of implants in clinical dentistry, new kinds of complications happen. Complications that can happen during implant placement are bleeding, nerve injury, jaw fracture, fenestration of maxillary sinus or nasal cavity, dehiscence, fenestration, injury of adjacent tooth. And complications that can happen after implant operation are infection, bleeding, hematoma, chronic sinusitis, peri-implantitis. Problems that are confronted during implant placement happen by inadequate preoperative treatment plan, inadequate consideration about individual anatomic difference, inadequate operation process and lack of experience of clinician. It is important that clinicians consider possible complications in advance and make a comprehensive treatment plan. We report the patient who was happened ramus fracture during block bone harvesting from ramus of severely atrophic mandible, the patient who came to emergency ward due to postoperative swelling and bleeding and the patient whose implant was migrated to maxillary sinus with a review of literature.

A clinicostatical study of jaw cyst between 2001-2005

Cyst is pathologic disease develops in hard tissue as well as soft tissue, which is lined by epithelium filled with liquid, semi-liquid, or air. Origins and symptoms of the cyst are various according to region, and symptoms are malocclusion, diversion of root, tooth mobility, periapical swelling, discoloration and lesion expansion, because the odontogenic cysts begin in the numerous rests of odontogenic epithelium. But almost cysts produce no symptoms unless secondary infection occurs. Treatment of small cysts may include extraction, endodontic therapy, and apical surgery. Treatment of a large cysts usually involves surgical removal (enucleation), Marsupialization(a method of decompression) or combination of two before mentioned. Bone graft is done for helping of bone defect healing at the same time of enucleation This clinical research from January 2000 to December 2005, analyzed by the age, sex, classification, size, region, treatment method, whether or not of bone graft of cyst in the jaw in Daegu Catholic University Hospital.

One-staged sinus bone graft using tapered porous surfaced implant in lower residual bone height of maxillary sinus