• 한국임상수의학회지
• /
• 제30권5호
• /
• pp.380-383
• /
• 2013

치아 골절을 가진 고양이에서 근관 치료 이후 복합레진과 포스트를 이용한 재건술의 증례이다. 내원한 고양이 3례 모두 구강검사와 치과 방사선 검사를 통해 치수가 노출된 치아 골절로 진단 되었다. 근관치료가 완료된 후, 일부 충전 물질을 제거하고 포스트를 설치하고 에칭과 본딩 전처치 후 복합 레진으로 광중합을 시행하였다. 치료된 치아들은 치과용 바와 디스크를 이용하여 성형하였으며, 6개월 동안 추시한 결과 치료된 치아들은 특별한 부작용을 발견할 수 없었다. 따라서 고양이에서 치수가 노출된 치아골절의 경우, 먼저 근관치료를 시행한 다음, 결과를 확인하고 복합 레진과 포스트를 이용한 재건술은 실시한다면 임상에 있어서 매우 좋은 효과를 거둘 수 있을 것으로 생각된다.

• 대한소아치과학회지
• /
• 제28권4호
• /
• pp.575-582
• /
• 2001

영구 전치부에 발생한 외상성 치은연하 파절과 자연 맹출을 기대하기 어려운 함입탈구가 발생한 경우에 여러 가지 치료방법이 알려져 있으나, 교정적 치아 정출술이 골수술을 동반한 치관길이 연장술이나 의도적 재식술에 비해 양호한 치료 성과를 나타내는 것으로 보고되고 있다. 본 증례는 외상으로 인해 치은연하로 치관파절을 보이는 환아들에서 근관치료와 함께 고정성 장치를 이용하여 치주수술을 동반한 교정적 치아 정출술을 시행한 후 복합레진 수복술로 치료하였다. 또한 치아함입이 있는 환아에서는 6개월 동안 자연 맹출을 기다린 후 맹출되지 않아 가철성 장치를 이용한 치아 정출술을 시행하여 치아를 원래의 위치로 회복시킬 수 있었는데, 이 환아의 경우 치료도중 실활의 증상을 보여 근첨성형술을 시행하였고 근첨이 형성된 후에는 근관충전을 통하여 비교적 양호한 임상적 결과를 얻을 수 있었다.

• Journal of Dental Anesthesia and Pain Medicine
• /
• 제22권5호
• /
• pp.377-385
• /
• 2022

Background: Postoperative endodontic pain is an enigma for the dentist. This study aimed to evaluate the analgesic effect of 300 mg gabapentin or 75 mg pregabalin in reducing postoperative endodontic pain compared with a placebo. Methods: Ninety patients who needed root canal treatment with an initial numerical rating scale (NRS) pain score of > 4 (T0) were randomly divided into three groups (n=30). Patients were then administered either 300 mg gabapentin (group A), 75 mg pregabalin (group B), or a placebo (group C) 30 min prior to the start of endodontic treatment. A single operator performed single-visit endodontics, and pain was evaluated immediately after endodontic treatment (T1) and at 4 h (T2), 8 h (T3), 12 h (T4), 24 h (T5), 48 h (T6), and 72 h (T7) using the NRS. Ibuprofen/paracetamol (400 mg/325 mg) was administered as a rescue dose if needed. Results: Pregabalin performed significantly better when compared with gabapentin at all time points except at 72 h after treatment (P=0.170). The placebo group showed significantly higher pain scores than the other two groups. The percentage of pain relief was maximum for pregabalin (92.1%), followed by gabapentin (87.6%) and placebo (69.1%) at 72 h after treatment completion. Conclusion: This study showed that pretreatment with a single dose of pregabalin and gabapentin both had greater analgesic effects than a placebo. They can be effectively used to reduce postoperative endodontic pain.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제50권3호
• /
• pp.140-145
• /
• 2024

Objectives: The necessity of retrograde filling after apicoectomy is controversial in cases of non-inflammatory cysts as opposed to bacteria-related periapical abscesses. This study aims to investigate whether the presence or absence of retrograde filling during apicoectomy has differential long-term prognostic implications between inflammatory and non-inflammatory cysts. Materials and Methods: This retrospective study included patients who underwent tooth apicoectomy during jaw cyst enucleation between 2013 and 2022, and who underwent follow-up cone-beam computed tomography for at least 6 months. The prognosis of the tooth was evaluated during the follow-up period according to the cyst type, the presence or absence of retrograde filling, mandible or maxilla, and location. Results: A total of 147 teeth was included in this study. All the operated teeth underwent preoperative root canal treatment by an endodontic specialist. Apicoectomy was performed for 119 inflammatory cysts and 28 non-inflammatory cysts. Retrograde filling was performed on 22 teeth with inflammatory cysts and 3 teeth with non-inflammatory cysts. All teeth survived the 3.5-year follow-up (range, 1.0-9.1 years). However, 1 tooth with an inflammatory cyst developed complications 1 year after surgery that required re-endodontic treatment. Conclusion: The prognosis of a tooth treated by apicoectomy without retrograde filling during cyst enucleation is favorable, regardless of the cyst type.

• Restorative Dentistry and Endodontics
• /
• 제46권4호
• /
• pp.56.1-56.11
• /
• 2021

Objectives: This study evaluated 2 nickel-titanium rotary systems and a complementary protocol with an ultrasonic tip and a small-diameter instrument in flattened root canals. Materials and Methods: Thirty-two human maxillary second premolars with flattened canals (buccolingual diameter ≥4 times larger than the mesiodistal diameter) at 9 mm from the radiographic apex were selected. The root canals were prepared by ProDesign Logic (PDL) 30/0.01 and 30/0.05 or Hyflex EDM (HEDM) 10/0.05 and 25/0.08 (n = 16), followed by application of the Flatsonic ultrasonic tip in the cervical and middle thirds and a PDL 25/0.03 file in the apical third (FPDL). The teeth were scanned using micro-computed tomography before and after the procedures. The percentage of volume increase, debris, and uninstrumented surface area were analyzed using the Kruskal-Wallis, Dunn, Wilcoxon, analysis of variance/Tukey, and paired and unpaired t-tests (α = 0.05). Results: No significant difference was found in the volume increase and uninstrumented surface area between PDL and HEDM (p > 0.05). PDL had a higher percentage of debris than HEDM in the middle and apical thirds (p < 0.05). The FPDL protocol resulted in less debris and uninstrumented surface area for PDL and HEDM (p < 0.05). This protocol, with HEDM, reduced debris in the middle and apical thirds and uninstrumented surface area in the apical third (p < 0.05). Conclusions: High percentages of debris and uninstrumented surface area were observed after preparation of flattened root canals. The HEDM, Flatsonic tip, and 25/0.03 instrument protocol enhanced cleaning in flattened root canals.

• Restorative Dentistry and Endodontics
• /
• 제23권1호
• /
• pp.257-268
• /
• 1998

During cleaning and shaping of narrow and curved canals, it is very difficult or nearly impossible to maintain the original canal shape. Procedural accidents such as, ledge, zipping, perforation, and instrument breakage are frequently occurred and even may lead to failure of endodontic therapy. To prevent these kinds of accidents, various instrumentation techniques and materials have been introduced. Recently some nickel titanium (NiTi) files are introduced and it is reported that These NiTi files created rounder preparations with less transportation than conventional instruments in curved canals. This study compared the change of the canal curvature and procedural accidents after instrumentation produced by stainless steel K-flexo file, and NiTi rotary files (Profile 29 and Quantec 2000). Thirty narrow and curved canals (25-45 degree) of extracted human molars were randomly divided into three groups. In group 1, canals were instrumented using a step-back and watch-winding/pull motion with K-flexo files. In group 2, canals were prepared with Profile 29. Group 3, canals were prepared with Quantec 2000 files. Before and after preparation of canals, periapical radiographs were taken and scanned. The change of canal curvature were measured using Photoshop 4.0 program and the incidence of procedural accidents were also evaluated. The results were as follows: 1. All group showed some loss of canal curvature after instrumentation. 2. Average loss of canal curvature was $6.70{\pm}5.31$ degree for group 1, $3.80{\pm}2.57$ degree for group 2, and $5.40{\pm}4.83$ degree for group 3. All group There was significant change in curvature between before and after instrumentation (p<0.05). But there was no statistical difference amoung 3 groups. 3. In group I, there were no procedural accidents, such as ledging, perforation, or instrument fracture. In group 2, two cases of ledge and one case of instrument fracture were produced Goup 3, each one case of ledge, perforation and instrument fracture were occurred. Whthin the limits of above results, It seems that NiTi rotary instrumentation is not All Mighty and if we use uncarefully, it is more dangerous to produce some procedural accidents than conventional hand files. But more studies should be taken to evaluate the exact effects of NiTi rotary instrumentations.

• 대한치과보철학회지
• /
• 제34권4호
• /
• pp.780-790
• /
• 1996

The endodontically treated tooth is generally restored with post and core, owing to the brittleness and the loss of large amount of tooth structure. Although there have been lots of studies about the endodontically treated teeth, the three-dimensional quantitative studies about the stress distribution of them are in rare cases. In this study, it was assumed that the coronal portion of the upper incisor had extensively damaged. After the root canal therapy it was post cored, and restored with PFG crown. The three-dimensional model, in which the root was supported with a normal alveolar bone, was constructed. Force was applied to the centric stop point with the angle of 135 degrees to the long axis of the tooth. Force was assumed to be 250N as functional maximum bite force of upper central incisors. The results analyzed with three-dimensional finite element method were as follows : 1. Stress was concentrated on the middle portion of the labial side dentin and the apical portion of the dentin. 2. Stress in the post was more concentrated on the post apex. 3. The displacement of the post at the post-cement interface was almost symmetrical la-bio-lingually. 4. It assumed that restoring extensively damaged tooth with a post-core and PFG crown is an adequate method of restoration.

• 대한치과의사협회지
• /
• 제38권6호통권373호
• /
• pp.567-569
• /
• 2000

Many teeth have been mistakenly extracted or endodontically treated because of an incorrect diagnosis of orofacial pain including toothache, A case report of persistent toothache originating from a malignant lymphoma of left maxilary sinus is presented. Root canal therapy and extraction of left upper quadrant teeth from canine to second molar did not resolve the chief complaint. The patient was referred to a neurologist and was diagnosed with a malignant lymphoma, a rare lesion of the maxillary sinus. The case stresses the importance of malignant neoplasms of maxillary sinus as a potential etiologic factor in the differential diagnosis of orofacial pain.

• 대한치과보존학회:학술대회논문집
• /
• 대한치과보존학회 2001년도 추계학술대회(제116회) 및 13회 Workshop 제3회 한ㆍ일 치과보존학회 공동학술대회 초록집
• /
• pp.583.1-583
• /
• 2001

One fifth dilution of formocresol is usually used for pulpotomy of primary teeth and emergency pulpotomy of permanent teeth. Recently Depulpin (VoCo., Germany) gains popularity as devitalizing agent during root canal therapy in spite of high concentration of 49% paraformaldehyde. But there are not enough publications about the reaction of dental pulp and periapical tissue caused by Depulpin. Therefore, This study was performed to evaluate the histological changes in pulp and periapical tissue of rat after pulpotomy using formocresol and Depulpin.(omitted)

• Restorative Dentistry and Endodontics
• /
• 제39권1호
• /
• pp.51-55
• /
• 2014

The term "endo-perio" lesion has been proposed to describe the destructive lesion resulting from inflammatory products found in varying degrees in both the periodontium and the pulpal tissues. In most of the cases, clinical symptoms disappear following successful endodontic therapy. However failure after conventional root canal treatment calls for surgical intervention. A 35 year old male patient with endo-perio lesion in right maxillary lateral incisor was treated with platelet rich fibrin (PRF) and alloplastic bone substitute after conventional endodontic therapy. At the end of 6 months there was gain in clinical attachment, increased radiographic bone fill and reduction in probing depth which was maintained till 18 month follow-up. Present case report aims to evaluate the efficacy of PRF and alloplastic bone substitute in the management of intrabony defect associated with endo-perio lesion in maxillary lateral incisor because the healing potential of PRF and bone graft has not been widely studied in endodontics. The use of PRF allows the clinician to optimize tissue remodelling, wound healing and angiogenesis by the local delivery of growth factors and proteins. The novel technique described here enables the clinician to be benefited from the full regenerative capacity of this autologous biologic material.