Histopathological findings of two cases of cartilaginous tumor arising in the tongue are reported and the histogenesis of these legions is discussed. The lesion of case 1 (a 23-year-old female) consisted of several small cartilaginous masses and other mesenchymal elements such as adipose tissue, mucous gland or muscle tissue. This case was diagnosed as cartilaginous hamartoma, which might originate from embryonic rests or pluripotential mesenchymal cells. The lesion of case 2 (a 46-year-old female) consisted of a large mass of cartilaginous tissue with partial ossification, and probably occurred in the aponeurosis linguae. This case was diagnosed as chondroma or osteochondroma, which might originate from metaplastic cartilaginous tissue in the aponeurosis linguae.

As an attempt to improve qualitative analysis of the diseases in the submaxillary portions, we are evaluating ultrasound B-scans. Nomal salivary glands demonstrate a high reflectivity in a homogeneous pattern and well outlined, but inflammatory glands have low reflectivity in a heterogeneous pattern. Cysts of the submaxillary portions are well outlined and devoid of interior echoes. Malignant lymphoma lesions demonstrate a low reflectivity in a heterogeneous pattem and have diffuse borders.

Diagnostic ultrasound technique enables the surgeon to detemine preoparativly the size and extent of the disease within the interior of the anatomical area involved.

A Case of submaxillary swelling caused by the root of the lower third molar which was displaced into the region of the submaxillary space is reported.

A 42-year old woman was referred to our clinic. Her chief complaint was swelling and pain of the right submaxillary area for 6 months’ duration. The patient stated that her right lower third molar had been extracted at a certain dental clinic, and these symptoms had been deveioping since then.

Clinical examination showed swelling of the right submaxillary area. Intraorally, the extraction wound was completely closed and cured. A firm phyma as large as a soy-been was found deep in the floor of the mouth by bimanual palpation. Sensory disturbance and hypogeusia of the tongue were discovered.

Radiographic findings revealed the displaced root at the inferior border of the right mandibula.

With the patient under general anesthesia, extirpation of the root was perfomed by the intraoral approach.

Postoperaive course was quite favorable. Two weeks after the operation, the symptoms, as well as the sensory disturbance of the tongue disappeared. Hypogeusia was remitted three months after operation.

Three cases of internal resorption, found in the upper left lateral incisor, the upper right lateral incisor and the lower right canine, are reported in the present paper.

Radiographic examination of the internal resorption revealed an oval and well-circumscribed radio-lucent area within the tooth.

Histological examination of the internal resorption revealed that various parts of the resorbed dentin wall showed a wavy appearance which was similar to that of Howship’s lacunae.

Intemal resorption was characterised by resorption of the pulpal dentine wall. It has been thought that internal resorption originates centrally within the pulp cavity associated with an inflammatory hyperplasia of the pulp, but the cause of the pulpal inflammation and resorption remains obscure in the present examination.

A 66-year-old female with aspergillosis of the right maxillary sinus is reported. She had been suffering from discomfort in the right maxillary region. An X-ray examination revealed a diffuse radiopacity in the right maxillary sinus. Histopathological examination of the biopsy material from the sinus revealed the presence of aspergillus Follow-up examination of the case have so far shown no recurrence.

This case deals with mandibular dysfunctions due to the result of occlusal dishamlony. The case refers to an 18 years old female who’s chief complaint was limitations and difficulty in opening the jaw and also clicking sounds of the right temporomandibular joint. Results of the findings showed that the mandibular dysfunctions were due to an untsable intercuspal position and occlusal interference.

A stabilization type occlusal splint was used to stabilize the occlusion. To improve the jaw opening movement a coordinating jaw opening exercise, with the aid of EMG biofeedback, was also used to treat this case. After the symptons diminished, final prosthetic treatment to obtain a structual and functional occlusal r㏄overy was carried out.

Results of the treatment were as follows:

1)After using the occlusal splint for 2 months, and at the same time undergoing jaw opening exercises twice a week for a total of 19 times, a jaw opening recovery from 18.7mm to 46.8mm was observed.

2)At the same time, the clicking sounds of the right TMJ diminished.

3)The use of jaw opening exercises with the aid of EMG biofeedback and the use of an occlusal splint was shown to be an effective treatment for the recovery of mandibular dysfunctions where pain was not an evident factor in limiting jaw movement.

4)No apparent signs of disturbance have been observed after 3 years and 8 months of observation following the final prosthetic treatment.