• The Journal of the Korean dental association
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• v.51 no.5
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• pp.255-264
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• 2013

Many concept of occlusion have been introduced in the past, but there isn't any generally accepted unified theory since a single occlusion theory cannot represent the natural perfection, especially considering the difference in clinical experience, the dynamic occlusion, and individual diversity in mastication pattern. NAT(Naturgemasse Aufwachstechnik)/NFR((Natur Funktionsgerechte Rekonstruktion) occlusion is not just a theory on occlusion, but a clinical occlusion that can be practically applied to clinical practice by providing dynamic occlusion adjusted to the individual mastication pattern and biomechanics. This report aims to provide a guide to a clinically biomechanical occlusion through the teamwork of both the dentist and the lab technician by introducing the NAT occlusion through following: reviewing the concept of occlusion in terms of morphology, its correlation with NAT/NFR occlusion, reviewing the limitation of conventional occlusion theories, and introducing the clinical application of NAT/NFR.

• Archives of Craniofacial Surgery
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• v.18 no.4
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• pp.264-268
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• 2017

The zygomaticomaxillary complex (ZMC) functions as a buttress for the face and is the cornerstone to a person's aesthetic appearance, by both setting the midfacial width and providing prominence to the cheek. Malar deficiency is often acquired by blunt injury incurred in a traumatic accident, resulting in ZMC fracture. A 48-year-old male patient presented a right ZMC fracture after contusion injury by a baseball. He only received conservative management and later he suffered discomfort during mouth opening at the moment of mastication, due to trismus involving the temporomandibular joint. In the current case, we describe a surgical technique, by which the malar body is shifted anteriorly and laterally after combined oblique-vertical osteotomy. The technique presented, eventually restored the former aesthetic position of the malar complex and symmetry, and, moreover, improved mastication function.

• Journal of Korean society of Dental Hygiene
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• v.15 no.6
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• pp.983-990
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• 2015

Objectives: The purpose of the study is to investigate the influencing factors of satisfaction and revisiting intention of dental implant patients. Methods: An interview and a self-reported questionnaire were completed by 190 patients in 10 dental clinics in Daegu, Gyeongbuk, and Gyeongnam from September 17 to October 31, 2015. The questionnaire consisted of the general characteristics of the subjects and satisfaction of implant. The instrument for implant interview was adapted form Pjetursson et al. by Likert 5 points scale. Cronbach's ${\alpha}$ in the study was 0.768. Data were analyzed by SPSS/AMOS version 21.0 program. Results: Cost satisfaction had direct effect on satisfaction of expectation and indirect effect on revisiting intent. Mastication satisfaction had the direct effect on satisfaction of expectation and revisiting intent, and indirect effect on revisiting intent. Satisfaction of aesthetic function had the direct effect on satisfaction of expectation, and the indirect effect on revisiting intent. Conclusions: The determining factors of successful dental implant included expenses, mastication function, and aesthetic satisfaction. The competent dental implant teamwork and appropriate expenses can satisfy the implant patients.

• Journal of Dental Rehabilitation and Applied Science
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• v.28 no.3
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• pp.269-276
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• 2012

Many researches have been published about the numerous factors related to the chewing ability of implant prosthesis. Most respective studies have concluded that the chewing ability of implant prosthesis is mostly fine compared to other type of prosthesis. However, some patients are not satisfied with their chewing ability of implant prosthesis. Therefore the neurologic factor, one of the factors related to dissatisfaction of chewing ability was reviewed in this study to understand the mechanism of action of mastication. Data was searched using the keywords; 'implant chewing ability, masticatory ability' in Pubmed database and reviewed. Definitions of chewing ability, factors of chewing ability are reviewed and the neurologic factor, one of the factors influencing on chewing ability, is reviewed. Mechanoreceptor of Periodontal ligament(PDL) is providing the mastication information to brainstem. Due to the absence of mechanoreceptions of PDL in implant, masticatory ability is decreased especially when chewing hard food. Masticatory muscles and mechanoreceptor in TMD may compensate the lack of mechanoreceptor of PDL in implants. Furthermore sensitivity of nerve fiber around peri-implant tissues may support the mechanoreception and sensory reaction in the implant mastication. However, further studies should be conducted to prove the relationships between neurologic factors and mastication.

• Journal of Dental Rehabilitation and Applied Science
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• v.25 no.3
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• pp.237-242
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• 2009

the primary diagnosis of synovial chondromatosis of temporomandibular joint is extremely rare. often many months, or even years pass before the diagnosis is confirmed. synovial chondromatosis is an uncommon disease of cartilage transformation of synovial membrane with formation of loose bodies within the joint space. a 28-year-old women had experienced pain of the left TMJ area at mastication. Radiographs of the left TMJ revealed calcified loose bodies in superior temporomandibular joint space. treatment consisted of removal of calcified loose bodies and synovail membrane. after surgery, pain of Lt temporomandibular area at mastication disappeared. until present after surgery there have been no recuurence of symptoms.

• Journal of the korean academy of Pediatric Dentistry
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• v.36 no.4
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• pp.631-639
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• 2009

Ectodermal dysplasia is a genetic disease which shows various congenital dysplasias in tissues differentiated from the ectoderm. As the most common type of the ectodermal dysplasia, hypohidrotic ectodermal dysplasia(HED) shows dysplasia mainly in the hair, fingernails, teeth and the skin. Symptoms are more severe in males than in females and heterozygous females are usually normal showing no symptom. The treatment for these patients differ according to individuals, but since patients can easily become depressed socially and emotionally due to a decrease in mastication and speech function caused by multiple loss of teeth as well as some aesthetic problems, an early treatment is required. In a case, with a 10 years-old boy diagnosed with HED which shows partial edentia of the maxilla, and the edentia of the mandible in the pediatric dentistry department of the Chosun University Dental Hospital, a fabrication of denture resulted in the recovery of mastication and speech function and aesthetic improvement due to an increase of the face height.

• The Journal of the Korean dental association
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• v.50 no.5
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• pp.244-255
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• 2012

Temporomandibular disorder(TMD) is described as a cluster of disorders characterized by pain in the preauricular area and/or the muscles of mastication; limitations or deviations in mandibular range of motion; and noises in the TMJ during mandibular function. The most common symptom in TMD patients is pain that is aggravated by chewing or other jaw function. These symptoms are appeared when the stimuli loaded in TMJ are over the physiologic tolerance. The primary goal in treatment of TMD is to alleviate pain and lor mandibular dysfunction. TMD treatment can be divided into 2 categories: reversible and irreversible methods. Reversible methods include medication, thermal therapy, habit modification, physical therapy, appliance therpy and arthrocentesis and lavage and irreversible methods include arthroscopic lysis, surgery, occlusal adjustment et al. It is widely accepted that reversible methods are ther first choice of treatments. However if reversible ones are not effective, irreversible methods are considered.

• Journal of Dental Rehabilitation and Applied Science
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• v.19 no.1
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• pp.1-6
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• 2003

It has been suggested that people who suffer from impaired masticatory function may adapt food consistency to their oral status (which may lead to deficient nutrient intake) or rely on the digestive system to compensate for the lack of oral preparation of food (which may increase the likelihood of digestive diseases and decrease gut absorption). Masticatory deficiency thus may be detrimental to health. This article reviews evidence of the effects of masticatory deficiency on nutrition. The selection of relevant literature was based on Medline queries using the following key words: mastication, nutrition, digestion, diet, and disease risk. Earlier work not listed in Medline but related to the subject also was reviewed. Only publications available in English were selected for inclusion. It is difficult to draw conclusions from many of the reviewed studies due to issues related to study design, confounding variables, and the subjective nature of the measurements. In particular, data supporting a link between masticatory function and deficient dietary intake often are based on relatively weak correlations and cannot confer a causal relationship.

• The Journal of Korean Academy of Prosthodontics
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• v.51 no.4
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• pp.353-360
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• 2013

Cleft lip and palate is congenital deformity in oral and maxillofacial area. Normal soft palate has velopharyngeal closure action by connecting oral cavity and nasal cavity at rest and moving upward at swallowing and specific pronunciation. Cleft palate patients with velopharyngeal insufficiency have difficulty in mastication, swallowing and pronunciation because velopharyngeal closure is incomplete. At this time, a prosthetic device used to cover palate defects is called a palatal obturator. A palatal obturator separates oral cavity and nasal cavity and recovers pronunciation, mastication, swallowing and esthetic function. The purpose of this case study is to report the results because it reaches a satisfactory result in functional and esthetic aspects through functional impression procedures using modeling compound and tissue conditioner for restoration of a cleft palate patient with velopharyngeal insufficiency.

• The Journal of Korean Academy of Prosthodontics
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• v.55 no.1
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• pp.88-93
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• 2017

Most patients with acquired maxillary surgical defects have difficulties such as functional impairments of mastication, speech, and deglutition as well as various degrees of facial deformity. The purpose of a prosthetic approach is to restore function and appearance with an obturator as normal as possible. This goal can be achieved when there is thoughful preoperative communication between a prosthodontist and a surgeon regarding a rehabilitation. In this case report, prosthetic rehabilitation was planned before the surgery for the patient diagnosed with squamous cell carcinoma in the right maxillary sinus with careful oral examination. Four months after maxillectomy, a definitive obturator was fabricated following the surgical and interim obturation phase. The objective of this case report is to describe the satisfactory results of the patient with improved rehabilitation of mastication, speech, deglutition, and appearance.