No abstract available.
Adult* ; Child* ; Chin* ; Humans

No abstract available.
Humans ; Temporomandibular Joint

No abstract available.
Intubation, Intratracheal ; Temporomandibular Joint

The results of implant therapy for the functional rehabilitation of tumor-patients are presented and discussed. It can be shown, that mandibular implants without osteoplasty show a similar low failure rate of about five percent as implants used in a control group of edentulous patients. Implants used in conjunction with osteoplasty and maxillary implants show a less favourable prognosis. Because of special problems and possible complications, especially in irradiated patients, we suggest a restrictive indication for implantations and a close follow-up of the patients.
Dental Implants* ; Follow-Up Studies ; Humans ; Prognosis ; Rehabilitation*

Modern antibiotic therapy and rapid surgical intervention have greately reduced the complication from the spread of odontogenic infections. Nevertheless, fatalities from dental infections continue to occur. One of the most threaded, and probably lethal form is the mediastinal abscess. This is a case of Ludwig's angina dissected along deep cervical planes into the mediastinum caused a virulent mediastinitis and abscess, computed tomography precisely delineated the extent of the infection. Incomplete debridement resulted in a residual abscess and persistent systemic sepsis that culminated in the patient's death. Aggressive antibiotic treatment of the orofacial cellulitis along with complete mediastinal drainage are recommended for optimal outcome.
Abscess* ; Cellulitis ; Debridement ; Drainage ; Ludwig's Angina ; Mediastinitis ; Mediastinum ; Sepsis

The purpose of present study is comparing the effect of Teflon Membrane and Nylon Membrane on bone regeneration in rabbit tibia. The 6 defects of 8x8x5mm size were drilled with dental handpiece in rabbit tibia, which on left side as an order of Control group(no coverage), Group 1(Nylon 5 micrometer size), Group 3(Nylon 10 micrometer size), and on right side Control group, Group 2(5 micrometer Teflon), Group 4(10 micrometer Teflon). Animals were killed at 7, 10, 14, 42 days to make specimens and observed the difference of healing potentials with light microscopy. The results were as follows ; 1. New bone formation has taken place at 14 days in Guided Bone Regeneration (GBR) group comparing to the Control group of massive inflammatory status. 2. Larger pore membrane allows more favorable healing potentials. Bone formation started earlier in larger membrane pore groups than smaller groups, until 14 days. 3. Bone forming potentials of Teflon membrane group was higher than Nylon membrane groups, Control group has the lowest bone forming potentials. 4. New bone formation was almost ended in 42 days, and there was no difference of bone formation between Nylon and Teflon membrane group of different size. There was no difference of bone formation at final stage(42 days) between Nylon membrane and Teflon membrane of same pore size. So nylon membrane may be clinically usable in guided bone regeneration case with further studies.
Animals ; Bone Regeneration ; Control Groups ; Membranes* ; Microscopy ; Nylons* ; Osteogenesis ; Polytetrafluoroethylene* ; Tibia*

As the result of the study concerning "bone inducibility of chitosan", 1. "BMP-2"was observed mainly through the test when the "osteoblast"is exposed to the "chitosan". The expression of BMP-2 was 542.63 times compared to control after 2 hours exposure and it was maintained 16.60 times till 24 hours. 2. The expression of BMP-4 was decreased compared to control during exposure. 3. The expression of BMP-7 revealed two peaks during exposure. 4. The expression of osteocalcin was increased in early phase, and then decreased. Although it is not clear whether the "chitosan"is clinically effective material as a "bone induction material", we could say that it has a function for bone induction. Further detailed study will be required.
Bone Morphogenetic Protein 7 ; Chitosan* ; Humans* ; Osteoblasts* ; Osteocalcin

In the field of oromaxillofacial surgery, it is not common to meet arteriovenous malformation(AVM) patients. AVMs are the result of congenital abnormality, or the result of trauma of adjacent vessels. This patients need special care in surgical procedure. Also, they need management include clinical, radiographic, and angiographic assessment. We report a case of the AVM in right maxillary artery, who embolized PVA and obtained good result.
Angiography ; Arteriovenous Malformations* ; Congenital Abnormalities ; Humans ; Maxillary Artery

With the object of providing a temporary artificial periodonal ligament-like membrane around the dental implant, 10 Branemark type implants were coated with commercially available chitosan(Fluka Co., Buchs, Switzerland) which has a molecular weight of 70,000 and 80% deacetylation degree. Once this bioactive hydrophillic polymer(chitosan) contacts with blood or wound fluids, it becomes swollen and penetrates into the adjacent cancellous bone. Thus the interface between implant and surrounding bone is completely filled with chitosan. This tight junction in early healing phase enhances primary stability. The chitosan coated dental implants were implanted into the fresh patella bones from porcine knees, since the thickness of cortical bone is relatively even and their cancellous structure is homogenous. To test the shock absorbing effect, 1mm delta-rogette strain gage was installed behind the implant. The results showed 1. the principal strain peak value directed to the impact of coated implant was 0.064 0.018(p<0.05) and that of uncoated implant was 0.095(0.032 p<0.05). 2. the peak time delay of coated implant was 0.056sec(0.011 p<0.05) and that of uncoated implant was 0.024sec(0.009 p<0.05). It can be reasoned from this results that the chitosan coating has a shock absorbing effect comparable with a temporary artificial periodontal ligament.
Absorption* ; Chitosan* ; Dental Implants* ; Knee ; Membranes ; Molecular Weight ; Patella ; Periodontal Ligament ; Shock* ; Tight Junctions ; Wounds and Injuries

The lateral rhinotomy signifies only an incision and not on operation and a lateral rhinotomy incision with osteotomy of the nasal bones provides access to the entire nasal cavity and maxillary, ethmoid, and sphenoid sinuses as well as the frontal sinus if the floor is removed, permitting removal of benign lesions at these sites and en bloc resection of the ethmoid labyrinth and the party wall between the nasal cavity and antrum with infiltrating tumors. The authors treated a tumor patient and a midfacial bone fracture patient via lateral rhinotomy approach and had a good result. So we report the cases with literature review.
Ear, Inner ; Fractures, Bone ; Frontal Sinus ; Humans ; Nasal Bone ; Nasal Cavity ; Osteotomy ; Sphenoid Sinus