• Journal of Dental Rehabilitation and Applied Science
• /
• v.39 no.1
• /
• pp.1-8
• /
• 2023

Purpose: The purpose of this study is to analyze the prognostic factors related to tooth loss after 5 years of periodontal surgery in periodontal disease patients. Materials and Methods: From January to December 2017, 22 patients and 124 teeth who underwent periodontal treatment through periodontal surgery were targeted. At the time of treatment, the measured values were evaluated after recording the maximum probing depth, average periodontal probing depth, number of root, furcation involvement, pulp vitality, and prosthesis state on the day of periodontal surgery. Based on the initial records at the time of visit, patient-related factors were gender, age, smoking, tooth loss due to periodontal disease at the time of first visit, diabetes, and maintenance period. The influence of each factor on tooth loss was evaluated. Results: As a result of examining the influence of tooth-related factors on tooth loss, the maximum probing depth depth (P: 0.000), bone loss (P: 0.021) was found to have a significant effect on tooth loss. Conclusion: As a result of examining the influence of patient-related factors on tooth loss, any variables had no significant effect. Bone loss, maximum probing depth acted as statistically significant prognostic factors for tooth loss in patients who underwent periodontal surgery.

• The Monthly Diabetes
• /
• s.207
• /
• pp.8-10
• /
• 2007

요즈음 치과병원을 방문해본 환자들은 치과에 상당히 여러과가 있다는 것으로 보고 당황한 경험이 있을 것이다. 구강이라는 아주 작은 분야에 이렇게 많은 전문과목이 있다는 것에 의문이 생기지 않을 수 없다. 하지만 의료의 다른 부분과 마찬가지로 치과에도 다양한 전문분야가 있으며 이중에 널리 알려져 있는 것이 일반인이 충치라고 하는 치아우식이라고 할 수 있다. 하지만 여러 연구에 의하면 치아우식으로 인한 치아상실은 연령이 증가함에 따라 줄어들게 되고, 성인의 치아상실의 가장 큰 원인은 치주질환으로 알려져 있다.

• Journal of Dental Rehabilitation and Applied Science
• /
• v.30 no.4
• /
• pp.329-338
• /
• 2014

Patients who lost molars from dental caries or periodontitis have difficulty in maintaining their vertical dimension because their incisors and premolars also show vertical tooth movement. Missing posterior molars leads to occlusal interference and collapse of occlusal plane due to extrusion of opposite teeth and tipping of adjacent teeth. When this condition persists over long time, mandible moves forward, so it causes mobility and labioversion of upper incisors. This progress cannot be stopped spontaneously and the situation gets worse and worse. Therefore, for a patient with pathologic teeth migration caused by chronic periodontitis, interdisciplinary approach which is including periodontal treatment, orthodontic teeth alignment and prosthetic restoration of missing molars is required. This case report shows successful multidisciplinary approach to a patient who lost vertical dimension due to severe dental caries and periodontitis.

• Journal of Dental Rehabilitation and Applied Science
• /
• v.32 no.1
• /
• pp.47-59
• /
• 2016

Purpose: The aim of this study was to investigate the changes in occlusal force after loss of the lower first molar depending on the inclination and extrusion of the adjacent and opposing teeth by using a strain gauge. Materials and Methods: Anatomic teeth were used to reconstruct the normal dental arch with loss of the lower right first molar. A uniformly thick layer of silicone was applied to the root to mimic the periodontal ligament. Four stages of dies with varying degrees of inclination and extrusion of the adjacent and opposing teeth were constructed and attached to master model interchangeably by using a CAD/CAM fabricated customized die system. The strain gauges were attached to teeth and a universal testing machine was used to determine the changes in occlusal force. An independent t-test and one-way ANOVA were performed (${\alpha}=.05$). Results: While simulating chewing food, the upper first, second premolar and lower second molar showed greater occlusal force than before extraction. When the change of adjacent teeth's occlusal force with their progressive movement after molar loss was evaluated, the difference among four die models was significant and was in the decreasing aspect (P < 0.05). Conclusion: When the lower first molar was lost and the adjacent teeth did not move yet, the occlusal force in adjacent teeth was higher than that when the lower first molar still existed. In addition, the occlusal force in the upper premolars and lower second molar decreased significantly with the progressive movement of adjacent teeth.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.29 no.3
• /
• pp.407-412
• /
• 2002

The primary cause of missing teeth vary depending on the region. The loss of posterior teeth is mainly due to dental caries, whereas that of the anterior teeth occur primarily due to trauma at the age of standing and walking and secondarily from the rampant dental caries. Particularly, reduction of the arch length in the cases of premature loss of primary teeth may compromise the eruption of succedaneous permanent teeth. This may result in crowding and impaction of the permanent teeth, and asymmetry of arch, thus a careful consideration for space maintenance should be made in such cases. Space maintainer is required in the case of premature loss of primary posterior teeth, because space loss result from the approximate and centrifugal movement of the neighboring teeth. Generally, in the case of primary incisor, space loss occurs when 1) tooth contact is relevant, 2) crowding in primary dentition is present, and 3) a primary incisor is lost before the eruption of primary canine. Contrarily, in the case of primary dentition with interdental space, space loss will not be observed, mostly when a primary incisor is lost after the eruption of primary canine. Thus, using a space maintainer in cases of premature loss of primary incisor has been introduced primarily not for the purpose of space maintaining but for an aesthetic purpose, prevention of parafunctional oral habits such as tongue thrust, and of pronunciation. Additionally, few case studies have been reported of space loss in cases of premature loss of primary incisor. This study is to report cases of the space loss following the premature loss of primary incisors observed in children.

• Journal of Dental Rehabilitation and Applied Science
• /
• v.32 no.2
• /
• pp.135-140
• /
• 2016

Patients who get tooth loss would also lost their esthetic, stability and functional aspect suddenly. They have to get provisional restoration immediately. This case reports a satisfied result that thermoforming technique is good for patients to get injury from unexpected tooth loss.

• Journal of Dental Rehabilitation and Applied Science
• /
• v.26 no.2
• /
• pp.145-156
• /
• 2010

Loss of posterior support may cause overloading and excessive wear of remaining teeth. Moreover, the extrusion of antagonistic teeth leads to the destruction of the occlusal plane. The loss of vertical dimension of occlusion (VDO) also emerges clinically, which may bring the loss of esthetic appearance and function. These patients who suffer from the loss of posterior support, often require vigorous periodontal treatments (osteotomy, crown lengthening) and extensive oral rehabilitation. Sixty three years old female patient visited for the prosthetic treatment of the posterior edentulous area. She had no other systematic disease and parafuctional habits for prosthetic treatment. Intraoral and radiographic examinations were done. The evaluation of VDO and vertical dimension of rest position were evaluated for proper prosthetic procedures and diagnostic wax up was done. As a result of diagnosis, VDO was increased by 2 mm considering the loss of VDO and space for the prosthetic treatment. After the pretreatments, initial preparation of teeth and provisionalization were carried out. Six weeks later of provisionalizaion, final preparation and impression was performed. Using the duralay resin copings, jaw relation was registered. The master cast was mounted and definitive restoration was fabricated. After the evaluation of esthetic and function, pick up impression for clinical remounting was done. Lucia jig was made for new jaw relation and occlusal adjustment on the articulator. Definitive restoration was delivered and the patient was periodically recalled for additional occlusal adjustment. From this case, the satisfactory functional and esthetic results through full mouth rehabilitation with increase vertical dimension were achieved.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.42 no.4
• /
• pp.319-326
• /
• 2015

Short root anomaly (SRA) is very rare, but can be problematic for physicians because patients with SRA are more vulnerable to root resorption with orthodontic forces. During the mixed dentition period, it may be difficult to diagnose generalized SRA. This article reports the treatment of an orthodontic patient with SRA at the early mixed dentition stage. Despite local tooth loss, a relatively favorable outcome was obtained without excessive root resorption. Ultimately, orthodontic therapy is possible for patients with generalized SRA, but precautions should be taken to avoid complications, such as tooth loss or root resorption.

• The Journal of Korean Academy of Prosthodontics
• /
• v.61 no.3
• /
• pp.215-226
• /
• 2023

Severe wear of the anterior teeth facilitates the loss of anterior guidance, which protects the posterior teeth from wear during excursive movement. Additionally, when treating patients with collapsed occlusion due to multiple tooth loss and tooth wear, it is important to determine the presence of vertical dimension loss through accurate clinical and radiographic examinations and diagnostic wax-up. The patient of this case is a 44-year-old female patient who complained of overall tooth wear and loss of posterior teeth due to bruxism and clenching habits, visited the hospital with the address of restoring masticatory function and improving aesthetic appearance through prosthetic treatment. Through model analysis and diagnostic wax-up, an increase in vertical dimension was determined, and full mouth restoration with fixed prostheses was planned. The degree of adaptation to the vertical dimension was confirmed step by step using an occlusal splint designed with CAD (Computer aided design) software and 3-D (3-Dimensional) printed, and then restored with provisional restoration and after a 4-month adaptation period, the entire dentition was restored with metal ceramic crowns and implants. Through this procedure, satisfactory treatment results were obtained in terms of function and aesthetics.

• The Monthly Diabetes
• /
• s.210
• /
• pp.64-66
• /
• 2007

많은 당뇨병환자가 눈, 혈관, 발에 합병증이 생기 않도록 혈당조절을 포함해 많은 신경을 쓰는 반면, 치주질환으로 인한 치아상실이나 염증 등은 심각하게 받아들이지 않고 방치한다. 나이가 들면 으레 치아가 빠지는 것이려니, 잇몸이 안 좋아지는 것이려니 하고 넘어가는 것이다. 당뇨병환자가 혈당조절을 하기위한 요소 중 식사요법이 중요한데, 치주질환을 방치해 치아가 빠지거나 잇몸 염증이 심하면 음식을 제대로 씹을 수가 없어 혈당관리가 어려워진다. 또한 치주질환으로 치료를 받고자 해도 일반 치과에서 받기에는 '당뇨'가 걸리고, 그렇다고 종합병원으로 가기에는 절차가 다소 복잡하기도 하다. 이에 한 치과에서 당뇨인들이 보다 쉽고 빠르게 치주질환문제를 해결할 수 있도록 당뇨치아클리닉을 개설해 찾아가보았다.