상악 전치부에 임플란트 식립 후 발생한 비구개관낭 : 증례 보고

임헌준 대한구강악안면병리학회 2015 대한구강악안면병리학회지 Vol.39 No.6

The trauma of incisive canal associated dental implant placement in the anterior maxilla can cause the nasopalatine duct cyst. It is difficult to identify the nasopalatine duct cyst or the location of the incisive canal, only using periapical radiograph or panorama radiograph. So it is necessary to take computed tomography scan for an analysis on the relation between the implant and the incisive canal. This case report present the patient had the nasopalatine duct cyst following the placement of dental implant in the anterior maxilla, and was undergone implant removal and cyst enucleation with bone graft.

Unilateral maxillary central incisor root resorption after orthodontic treatment for Angle Class II, division 1 malocclusion with significant maxillary midline deviation: A possible correlation with root proximity to the incisive canal

Toshihiro Imamura,Shunsuke Uesugi,Takashi Ono 대한치과교정학회 2020 대한치과교정학회지 Vol.50 No.3

Root resorption can be caused by several factors, including contact with the cortical bone. Here we report a case involving a 21-year-old female with Angle Class II, division 1 malocclusion who exhibited significant root resorption in the maxillary right central incisor after orthodontic treatment. The patient presented with significant left-sided deviation of the maxillary incisors due to lingual dislocation of the left lateral incisor and a Class II molar relationship. Cephalometric analysis demonstrated a Class I skeletal relationship (A pointnasion- B point, 2.5o) and proclined maxillary anterior teeth (upper incisor to sella-nasion plane angle, 113.4o). The primary treatment objectives were the achievement of stable occlusion with midline agreement between the maxillary and mandibular dentitions and appropriate maxillary anterior tooth axes and molar relationship. A panoramic radiograph obtained after active treatment showed significant root resorption in the maxillary right central incisor; therefore, we performed cone-beam computed tomography, which confirmed root resorption along the cortical bone around the incisive canal. The findings from this case, where different degrees of root resorption were observed despite comparable degrees of orthodontic movement in the bilateral maxillary central incisors, suggest that the incisive canal could be an inducing factor for root resorption. However, further investigation is necessary to confirm this assumption.

cone beam형 전산화 단층촬영장치를 이용한 절치관의 연구

김규태,황의환,이상래 大韓口腔顎顔面 放射線學會 2004 Imaging Science in Dentistry Vol.34 No.1

Purpose : To investigate the anatomical structure of the incisive canal radiographically by a cone beam computed tomography. Materials and Methods : 38 persons (male 26, female 12) were chosen to take images of maxillary anterior region in dental CT mode using a cone beam computed tomography. The tube voltage were 65, 67, and 70 kVp, the tube current was 7 mA, and the exposure time was 13.3 seconds. The FH plane of each person was parallel to the floor. The images were analysed on the CRT display. Results : The mean length of incisive canal was 15.87mm±2.92. The mean diameter at the side of palate and nasal fossa were 3.49 mm±0.76 and 3.89 mm±1.06, respectively. In the cross-sectional shape of incisive canal, 50% were round, 34.2% were ovoid, and 15.8% were lobulated. 87% of incisive canal at the side of nasal fossa have one canal, 10.4% have two canals, and 2.6% have three canals, but these canals were merged into one canal in the middle portion of palate. The mean angles of the long axis of incisive canal and central incisor to the FH plane were 110.3˚±6.96 and 117.45˚±7.41, respectively. The angles of the long axis of incisive canal and central incisor to the FH plane were least correlated (r = 0.258). Conclusion : This experiment suggests that a cone beam computed radiography will be helpful in surgery or implantation on the maxillary incisive area.

파노라마 방사선사진을 이용한 아래턱뼈 앞니관의 평가

김태훈 ( Tae Hoon Kim ),유선경 ( Sun Kyoung Yu ),서요섭 ( Yo Seob Seo ),강한수 ( Han Soo Kang ),이철권 ( Chul Kwon Lee ),김흥중 ( Heung Joong Kim ) 조선대학교 치의학연구원 2015 Oral Biology Research (Oral Biol Res) Vol.39 No.1

Purpose: Panoramic radiography is primary and easily used in the dental treatment for preoperative evaluation of the various anatomical structures. The aim of this study was to assess the visibility and anatomical morphology of the mandibular incisive canal using panoramic radiography. Materials and Methods: Panoramic radiographs were obtained from 60 patients (30 males, 30 females; mean age 49.5 years) using a standard exposure and patient positioning protocols. The visibility of the mandibular incisive canal, the origin and end points according to the tooth level, and horizontal distance between two points were measured. The diameter of the incisive canal at the origin point and the vertical distance between each origin and end points and the inferior border of the mandible were investigated. The significant difference between gender, age, and mandible side were analyzed on all measurements parameters. Results: The mandibular incisive canal was visible in 56 cases (46.7%) radiographs. The mean origin and end points according to tooth level were located between the second premolar and the first premolar and the canine, respectively, and the horizontal distance was 9.61±3.74 mm. The mean diameter at the origin point was 2.96±0.55 mm and the mean vertical distance at the origin and end points were 11.48±1.59 and 10.96±2.08 mm, respectively. The mandibular incisive canal showed statistically significant differences in all measurements parameters on gender. Conclusion: The mandibular incisive canal in panoramic radiography presented the low detection rate. However, these results can provide primary morphological features of the mandibular incisive canal on panoramic radiographs which is widely used in dental practices.

전산화단층영상에서 절치관 및 순측 치조골 폭경에 관한 연구

노양균,장현선,김병옥,김진수 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.36 No.3

Purpose : To assess the width of the labial alveolar bone of the incisive canal and the width of the incisive canal on spiral computed tomographic images of the anterior portion of the maxilla. Materials and Methods : Study materials included 38 CT scans taken for preoperative planning of implant placement. Axial cross-sectioned image entirely showing the incisive canal was selected and scanned with 600 DPI resolution. The width of the labial alveolar bone of the incisive canal at an orifice to the oral cavity, middle portion, and an orifice to the nasal cavity and the diameter of the incisive canal at the middle portion were determined by two specialist using Digora for Windows 2.1. The statistical analyses were carried out using SPSS 12.0.1. Results : When the maxillary central incisors remained, the mean labial alveolar bone width were 6.81±1.41 mm, 6.46±1.33 mm, and 7.91±1.33 mm. When the maxillary central incisors were missed the mean width were 5.42±2.20 mm, 6.23±29 mm, and 7.89±2.13 mm. Conclusions : The labial alveolar bone width at middle portion and an orifice to the nasal cavity were of no statistical significant difference according to presence of the maxillary central incisors (P>0.05). The width between oral cavity and nasal cavity, middle portion and to nasal cavity revealed statistically significant difference (P<0.05).

정중구개부의 미니 임플랜트 식립과 관련된 절치관의 해부학적 연구

김성진,임성훈 대한치과교정학회 2009 대한치과교정학회지 Vol.39 No.3

Objective: The purpose of this study was to reveal the position of the incisive foramen in relation to the incisive papilla and cusp tips. Methods: Plaster models and CT images of 25 adult orthodontic patients were used to measure the width of the incisive canal and positions of the anterior and posterior borders of the incisive foramen in relation to the incisive papilla. Results: The palatal surface distance from the interdental papilla between the maxillary central incisors to the posterior border of the incisive foramen along the palatal surface was 1.7 fold of the distance from the interdental papilla between the central incisors to the posterior border of the incisive papilla. The distance between the posterior border of the incisive papilla and posterior border of the incisive foramen along the palatal surface was 6.15 ± 1.75 mm. The anteroposterior position of the posterior border of the incisive foramen was slightly anterior to the lingual cusp tips of the maxillary 1st premolars. The width of the incisive foramen was 4.03 ± 0.64 mm, therefore it is recommended to position the mini-implant more than 3 mm laterally when placing a mini-implant lateral to the incisive foramen, from the center. Conclusions: These results can be used as a reference in presuming the position of the incisive foramen when placing mini-implant in the anterior palate area. 정중구개봉합부에 교정용 미니 임플랜트를 식립하고자 할 때 절치관의 해부학적 위치를 파악하여 이를 피하여 식립하여야 한다. 본 연구에서는 절치관의 해부학적 위치를 절치유두나 치관의 교두첨 등의 임상적 지표를 이용하여 예측할 수 있는 해부학적 자료를 마련하고자 하였다. 성인 남녀 25명의 진단 모형과 전산화 단층촬영(CT) 자료를 통해 절치관의 해부학적 형태, 절치유두와 절치관의 전후방적인 위치의 관련성 및 치관 교두첨의 전후방 위치에 따른 절치관 후방 정중구개봉합부의 골두께를 계측하였다. 계측 결과 중절치 사이 설측 치간유두에서 절치공 후연까지 구개면상의 거리는 치간유두-절치유두 후연 길이의 약 1.7배에 해당하였으며 절치유두 후연에서 절치공 후연까지의 구개면상의 거리는 평균 6.15 ± 1.75 mm였다. 절치공 후연의 전후방적 위치는 교두첨을 기준으로 평가 시 제1소구치의 설측교두보다 약간 전방에 해당하였으며, 이 부위 직후방에서는 골표면에 수직으로 식립하는 것보다 교합평면에 수직으로 식립할 때 골두께가 더 두꺼웠다. 또한 절치관의 폭경이 구개에서 4.03 ± 0.64 mm인 것을 고려할 때 절치관의 측방에 식립코자 하는 경우 정중에서 3 mm 이상 측방에 식립하는 것이 바람직하다. 교정용 미니 임플랜트를 정중구개부에 식립할 때 본 연구 결과를 절치공의 위치를 짐작하는 데 활용할 수 있을 것이다.

Topographical variations of the incisive canal and nasopalatine duct in human fetuses

Ji Hyun Kim,Shunichi Shibata,Hiroshi Abe,Gen Murakami,José Francisco Rodríguez-Vázquez 대한해부학회 2019 Anatomy & Cell Biology Vol.52 No.4

The incisive canal for nerves and vessels is generally thought to run along a suture between the incisive bone (IN) and maxilla. In contrast, there was a report saying the canal passes through the IN or primary palate in human fetuses. Examination of sagittal and frontal sections from 69 fetuses (31 of gestational age [GA] 9–15 weeks and 38 of GA 26–34 weeks) showed that the canal often penetrated the IN at the nasal half of its course and that, in other fetuses, the canal penetrated the IN along its entire course, irrespective of involvement of the nasopalatine duct. Canals developing in and corresponding to parts of the suture resulted in partial enlargement of the thin and tight sutures, which contained loose tissue, vessels, nerves and even a duct. Small processes of the IN were identified as upper irregular parts continuous with inferior main masses of bone in frontal sections but as bone fragments in sagittal sections. In some sections, a thin layer of the maxilla along the canal covered the medial or inferior aspect of the IN. Therefore, the incisive canal with or without duct exhibited a spectrum of variations in topographical relation to the IN-maxillary border. Because the primitive oronasal communication passes through the suture, the nasopalatine duct may have originated from the secondary developed elongation of the nasal epithelium at midterm. A large incisive fossa along the midline on the oral surface of the palate might make a macroscopic finding of variants difficult even in adults.

Comprehensive review of the incisive branch of the inferior alveolar nerve

Jennifer A,Caughey,Quang Do,Daniel Shen,Hiroe Ohyama,Puhan He,R. Shane Tubbs,Joe Iwanaga 대한해부학회 2021 Anatomy & Cell Biology Vol.54 No.4

The incisive branch of the inferior alveolar nerve is a vital anatomical structure within the anterior mandible that has not been thoroughly defined and outlined in reports in the literature until recent years. Advances in radiological imaging, particularly the widespread use of cone-beam computed tomography has allowed for accurate visualization of the mandibular incisive canal (MIC) and its associated incisive branch of the inferior alveolar nerve. Surgical damage to the MIC, which could result in hemorrhage and sensory disturbance, may occur in commonly practiced oral and maxillofacial procedures, such as chin bone harvesting, implant placement, fracture repair and removal of pathologic entities of the anterior mandible. Knowledge of both the presence, dimensions and location of the incisive branch is a vital component to pre and peri-operative planning of oral and maxillofacial surgeries performed within the mandible, particularly within the interforaminal zone. In this article, the terminology, anatomy, imaging, surgical consideration, and pathology of the incisive branch will be discussed.

태아의 상악골 절치도에서 생긴 과잉치배

이석근,임창윤,지제근 대한병리학회 1989 Journal of Pathology and Translational Medicine Vol.23 No.2

감염이 동반된 정중구개낭 1예

신현우,차원재,김인경,진홍률 대한이비인후과학회 2007 대한이비인후과학회지 두경부외과학 Vol.50 No.11

to the palatine papilla. Its etiology is generally attributed to the enclavement of remnants of epithelium surrounding the two lateral maxillary proceses that fuse to form the hard palate. The median palatine cyst sometimes poses challenges in the diagnosis due to the diversity and complicated clasifications of the cysts originating from the maxilla and palate. We present a case of large median palatine cyst of a 50-year-old man who had purulent rhinorrhea and foul odor for 1 year. An endonasal endoscopic mar-supialization was performed and pus was drained from the cyst. There was no recurence of symptoms and the ostium was wel maintained at 4 months after the operation. We report this case with a brief literature review. (Korean J Otorhinolaryngol-Head Neck Surg 2007 ;50 :1058-61)