Retrospective study on survival and complication rates of posterior single implant according to the implant diameters, lengths and position / 대한치과보철학회지

Purpose@#. This retrospective study was to investigate the survival and complication rates of posterior single implant according to the implant diameters, lengths and position. @*Materials and methods@#. Patients who had been restored single implant prosthesis in the posterior area by the three prosthodontists in the department of prosthodontics, Daejeon dental hospital of Wonkwang university, in the period from February 2014 to May 2018 were selected for the study. A total of 505 patients with 697 implants were observed. The survival and complications of implants were investigated using electronic medical records and radiographs. Fixture diameters, lengths, position, patient’s sex and age were assessed as possible factor affecting the survival and complications of implants. @*Results@#. 3-year cumulative survival rates of posterior single implants were 98.5% and 5-year cumulative survival rates were 94.4%. 5-year cumulative survival rates were higher in implants with diameter > 4.0 mm (97.0%) than implants with diameter ≤ 4.0 mm (89.5%), and in females (98.8%) than males (92.4%). There were statistically significant differences (P 4.0 mm than implants with diameter ≤ 4.0 mm and in females than males. Abutment screw loosening which was the most commonly occurring complication occurred more frequently in the lower molar region, in males than females, and in patients aged < 65 years than patients aged ≥ 65 years. There were statistically significant differences.

The survey on foreign body ingestion and aspiration during the dental prosthetic treatment

Purpose@#This study was to investigate the dentists’ experience and awareness of foreign body ingestion and aspiration during dental prosthetic treatment. @*Materials and Methods@#A survey of 157 dentists working at 108 dental institutions in Daejeon and Chungcheong provinces was carried out and frequency analysis was conducted. Chi-square test was conducted to find out the difference between the sociodemographic data and experience of foreign body ingestion and aspiration of patients and independent sample t-test was conducted to find out the difference in awareness depending on whether receiving related education. @*Results@#The percentage of dentists experiencing dropping foreign body into patients’ oral cavity was 99.4% and the percentage of dentists experiencing foreign body ingestion and aspiration of patients was 53.5%. There were more dentists who experienced foreign body ingestion and aspiration of patients in male than female, longer working career, and general practitioners than specialists (P < .05). 50.3% of the respondents received related education. When they receive related education, they had low degree of concern, high confidence in coping with situations, and low willingness to receive education in the future (P < .05). @*Conclusion@#The percentage of foreign body dropping was 16% higher in prosthetic treatment than general treatment. The percentage of dentists with experience of foreign body ingestion and aspiration of patients was 53.5%. Among them, 92.9% experienced foreign body ingestion of patients and 7.1% of them experienced foreign body aspiration of patients.

Full mounth rehabilitation using OP finder ® system for patient with inadequate occlusal plane and multiple occlusal wear tooth state: a case report

The diagnosis and treatment plan for forming ideal occlusal plane in full mouth rehabilitation are difficult because each process is complicated and information exchange between dentist and technician is subjective. The OP finder® system simplifies this process and helps to deliver more objective and accurate information. In this case, full mouth rehabilitation was performed using OP finder® system for patients with old bad fixed prosthesis and severely worn mandibular teeth, and reported that the result of proper occlusal plane setting and masticatory function recovery was obtained

Single-tooth implant restoration with alveolar bone augmentation in the maxillary anterior tooth region: a case report

In case of gingival recession and alveolar bone defects due to tooth loss for a long period of time in a single tooth in the maxillary anterior region, it is not easy to obtain aesthetic results with a single implant prosthesis. For aesthetic restoration, it is important to preserve hard and soft tissues through alveolar bone augmentation as well as restore harmony with adjacent teeth and soft tissues by placing the implant in an ideal location. In this case, an implant was placed using guided bone regeneration and a connective tissue graft simultaneously with immediate implantation after extraction from the maxillary anterior region where only residual root was left for a long period of time.

Rehabilitation using twin-stage method for a Sjögren's syndrome patient with severe discoloration and attrition on upper and lower anterior teeth / 대한치과보철학회지

Patients with Sjögren's syndrome usually suffer from teeth discoloration and attrition due to xerostomia. If the anterior teeth are badly worn, problems such as loss of anterior guidance, occlusal disharmony, and limited space for restoration may occur. However, ideal occlusion is obtained in both centric and eccentric relation by regaining the disocclusion of the posterior teeth through the anterior and lateral guidance using twin-stage method. In this case, rehabilitation was performed for a Sjögren's syndrome patient with maxillary and mandibular incisor's severe attrition and teeth discoloration by using twin-stage method.

Rehabilitation using twin-stage method for a Sjögren's syndrome patient with severe discoloration and attrition on upper and lower anterior teeth / 대한치과보철학회지

Patients with Sjögren's syndrome usually suffer from teeth discoloration and attrition due to xerostomia. If the anterior teeth are badly worn, problems such as loss of anterior guidance, occlusal disharmony, and limited space for restoration may occur. However, ideal occlusion is obtained in both centric and eccentric relation by regaining the disocclusion of the posterior teeth through the anterior and lateral guidance using twin-stage method. In this case, rehabilitation was performed for a Sjögren's syndrome patient with maxillary and mandibular incisor's severe attrition and teeth discoloration by using twin-stage method.

Clinical Features and Prognostic Factors Influencing Long-term Survival in pT2 Gallbladder Carcinoma Patients

PURPOSE: The prognosis of gallbladder carcinoma is unfavorable, and the depth of invasion, the T-factor, is the most important prognostic factor. T2 tumors are not easily diagnosed preoperatively, and they have unpredictable behavior. In this study, we reviewed the clinicopathologic features of pT2 gallbladder carcinoma and identified prognostic factors. METHODS: We enrolled 64 pT2 gallbladder carcinoma patients who underwent surgery in Kyungpook National University Hospital between January 1992 and July 2006. The clinicopathologic features were retrospectively reviewed, and univariate and multivariate analyses were performed using the Kaplan-Meyer method and Cox regression hazard model to identify factors influencing long-term survival. RESULTS: Twenty-one patients (32.8%) were asymptomatic, with seven tumors (10.9%) found incidentally. The gallbladder body was the most commonly involved site (45.3%, 29/64). Although CA19-9 was not sensitive, it was helpful for predicting recurrence. The 5-year diseasespecific survival rate in R0 resection was 75.9%, whereas no patients in the R1 or R2 resection groups survived more than 18 months.ANone of the clinicopathologic factors was prognostic. The unfavorable prognostic effect associated with lymph node involvement highlights the importance of complete lymph node dissection. Partial liver resection favorably affected survival, but not to a statistically significant degree. CONCLUSION: Absence of symptoms and specific imaging findings in patients with considerable pT2 gallbladder carcinoma warrants high disease suspicion, and every effort should be taken to achieve R0 resection with extensive lymph node dissection, since it may improve long-term survival in pT2 carcinoma patients.

Nonoperative Treatment for Grade IV Liver Injury / 한국간담췌외과학회지

PURPOSE: Though the nonoperative management of liver injury (NOMLI) has frequently been employed for traumatic liver injuries, the indications for NOMLI for grade IV liver injuries are still controversial. To determine the usefulness of the NOMLI in grade IV liver injuries, the clinical features of an operative management (n=26) and a NOMLI group (n=20) were compared. METHODS: For the 10 years up until Feb. 2004, 46 grade IV liver injury cases, according to the AAST liver injury scale, at the Kyung Pook National University Hospital, were selected for this study. The clinical features, grade of liver injury and outcomes of treatments were reviewed retrospectively. RESULTS: Of the 46 cases 40 (87%) and 6 (13%) were male and female, respectively. The mean ages of the male and female cases were 37.6 (15.2 and 34.5 (16.7 years, respectively. The causes of liver trauma were vehicle accident (71.7%, 33/46), industry accident (26.1%, 12/46) and violence (2.2%, 1/46). The accompanying abdominal injury was not present in the NOMLI group compared to 30.8% (8/26) in the operative management group. NOMLI was more than 2 times more frequently indicated after Feb. 1999. The mortality in operative management group was 11.5% (3/26) compared with none in the NOMLI group. 20% (4/20) of NOMLI group failed due to delayed bleeding and eventually had to undergo operations and the 80% (16/20) of NOMLI group was successful. The morbidity in successful NOMLI group was bile collection (6.25%, 1/16) and empyema (6.25%, 1/16). CONCLUSION: Nonoperative management for grade IV liver injury in hemodynamically stable patients without accompanying abdominal injury was successful. However, continuous monitoring and immediate operative management should be prepared for the delayed bleeding.

Follow-up Results in Patients Underwent Axillo-femoral Bypass for Aortoiliac Occlusive Disease

PURPOSE: Axillofemoral bypass for aortoiliac occlusive disease is a type of extra-anatomic bypass with varying reputations. This study was performed to observe early and late outcomes in patients underwent axillofemoral bypasses. METHOD: We retrospectively reviewed 25 patients who underwent 16 elective and 9 emergent axillofemoral bypasses. Mean age of patients was 72.5 years. Coexisting medical conditions included hypertension in 44%, ischemic heart disease in 28%, diabetes in 20%, chronic obstructive pulmonary disease in 20%, malignant tumor in 12% and cerebrovascular disease in 8%. All patients were presented with critical leg ischemia except for 2 with short-distance claudication. Axillofemoral bypass was performed under general anesthesia making configuration of inverted C shaped femoro-femoral bypass and redundant axillo-femoral limb using 8 mm ringed PTFE graft. RESULT: Two operative mortality occurred after emergent operations. Long-term folow-up results revealed 1 and 3 year primary graft patencies were 88% and 36% in the emergent operation group and 75% and 56% in the elective operation group. Limb salvage rates were 92% and 87% at 1 and 3 years respectively. Patient survival at 1 and 3 years after bypass operations were 78%, 22% in the emergent operation group and 86% and 54% in the elective operation group respectively. However, the differences between these 2 groups were not statistically significant. CONCLUSION: After performing 16 elective and 9 emergent axillofemoral bypasses for patients with higher surgical risk and poor distal runoff arteries, we experienced rather higher operative mortality, leg amputation rates and poor follow-up results. However, in the case of very high risk patients with no other treatment option, axillofemoral bypass can be, not only a limb saving, but a life saving procedure.