• 대한치과교정학회지
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• 제32권5호
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• pp.361-373
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• 2002

이번 연구의 목적은 골격성 III급 부정교합자의 악교정 수술 전과 수술 후의 하악전치부 치조골의 형태 변화를 평가하는 것이다 : 하악지 시상골분할절단술만을 시행받은 30명의 성인 골격성 III급 부정교합자를 대상으로 하였다. 초진시와 수술 전과 수술 후 3개월이 경과하였을 때의 측모두부규격방사선 사진을 비교하였다 골격과 하악이부의 계측치를 비교하였으며 이들 사이의 상관성 분석을 시행하여서 다음과 같은 결과를 얻었다. 1. 술전교정후군과 악교정수술후군에서 치료전군에 비해 하악전치부의 순측과 설측의 치조골 높이가 감소하였다. 2. 치조골 기저부의 전후방적인 폭경은 두개안면골격의 수직계측항목과 역상관관계를, IMPA와는 순상관관계를 보였다(P<0.01). 3. 하악이부 계측항목중 하악이부의 장경과 폭경은 두개안면골격과 상관관계를 보이지 않았다. 4. 순측의 치조골 높이와 설측의 치조골 높이는 순상관관계를 나타냈지만(p<0.001), 설측의 치조정의 폭경과는 역상관관계를 보였다(p<0.01). 순측과 설측의 치조정의 폭경은 역상관관계를 보였다(p<0.05). 하악이부의 장경과 폭경은 서로 순상관관계를 보였다(p<0.01). 5. IMPA와 LISA는 순, 설측치조골의 장경과 설측의 치조골 폭경과는 역상관관계를 보였지만, 순측치조골폭경과는 순상관관계를 보였다

• 치위생과학회지
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• 제2권2호
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• pp.115-119
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• 2002

본 연구는 신체적, 정신적으로 장애가 있는 장애학생의 구강 건강상태를 조사하였고 대조군으로는 일반학교에 다니는 일반학생을 대상으로 하였다. 6개의 장애학교의 학생들과 4개의 일반학교 학생들을 조사하였다. 조사기간은 1999년 8월부터 1999년 11월까지이며, 장애학생 597명과 일반학생 731명의 구강건강상태를 조사 평가해 보았다. 1. 장애학생과 일반학생의 구강건강상태는 우식영구치는 비슷한 수준이었고, 상실영구치는 일반학생($0.11{\pm}0.54$개)보다 장애학생($0.41{\pm}1.16$개)에서 높게 나타났으며(p<0.01), 치주질환도 일반학생(10.9%)보다 장애학생(29.1%)이, 부정교합에서도 일반학생(7.4%)보다 장애학생(25.6%)에서 더 높게 나타났다(p<0.01). 2. 장애유형에 따른 구강건강상태는 우식영구치에서 $2.24{\pm}2.14$개로 정신지체장애학생이 가장 높게 나타났으며, 감강기능장애의 학생은 $1.75{\pm}2.10$개로 가장 낮게 나타났다(p<0.05). 상실영구치는 장애유형에 따른 차이는 없었으나, 치주질환에서는 정신지체장애학생이 63.8%로 가장 높게 나타났다. 또한 부정교합에서도 정신지체장애학생이 59.5%로 지체장애학생(9.2%)이나 감각기증장애학생(31.3%)보다 높게 나타났다(p<0.01). 3. 정기적인 치아관리를 하고 있는 학교의 학생에 비해 그렇지 못한 학교의 학생이 치주질환과 부정교합이 많았으나, 우식영구치와 상실영구치는 비슷한 수준이었다. 집단숙식을 하는 학교의 학생과 그렇지 않은 학생의 학생에 대한 우식영구치, 상실영구치, 치주질환, 부정교합에서는 모두 비슷한 수준이었다.

• 대한치과교정학회지
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• 제54권3호
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• pp.171-184
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• 2024

Objective: This study aimed to determine the maxillary and mandibular basal bone regions and explore the three-dimensional positional relationship between the dentition and basal bone regions in patients with skeletal Class I and Class II malocclusions with mandibular retrusion. Methods: Eighty patients (40 each with Class I and Class II malocclusion) were enrolled. Maxillary and mandibular basal bone regions were determined using cone-beam computed tomography images. To measure the relationship between the dentition and basal bone region, the root position and root inclination were calculated using the coordinates of specific fixed points by a computer program written in Python. Results: In the Class II group, the mandibular anterior teeth inclined more labially (P < 0.05), with their apices positioned closer to the external boundary. The apex of the maxillary anterior root was positioned closer to the external boundary in both groups. Considering the molar region, the maxillary first molars tended to be more lingually inclined in females (P = 0.037), whereas the mandibular first molars were significantly more labially inclined in the Class II group (P < 0.05). Conclusions: Mandibular anterior teeth in Class II malocclusion exhibit a compensatory labial inclination trend with the crown and apex relative to the basal bone region when mandibular retrusion occurs. Moreover, as the root apices of the maxillary anterior teeth are much closer to the labial side in Class I and Class II malocclusion, the range of movement at the root apex should be limited to avoid extensive labial movement.

• 대한치과의사협회지
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• 제13권12호
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• pp.1117-1126
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• 1975

• 대한치과의사협회지
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• 제38권5호통권372호
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• pp.452-465
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• 2000

• 대한치과의사협회지
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• 제16권4호통권107호
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• pp.267-271
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• 1978

• 대한치과의사협회지
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• 제20권5호통권156호
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• pp.457-460
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• 1982

• Imaging Science in Dentistry
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• 제37권4호
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• pp.217-220
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• 2007

Purpose: The purpose of this study was to compare the location of the mandibular canal in Class III malocclusion to its location in normal occlusion for adults. Materials and Methods: For this study 32 skeletal Class III patients and 26 normal patients were observed. Four measurements were taken on cross sectional tomography between the first and second molars: the distance from the mandibular canal to the inner surface of both the buccal and lingual cortices, the distance from the mandibular canal to the inferior border of the mandible, and the buccolingual width of the mandible. The buccolingual location of the canals was classified as lingual, central, or buccal. Each measurement was analyzed with an independent t test to compare Class III malocclusion to normal occlusion. Results: Compared to the control group, the prognathic group had a shorter distance from the canal to the inner surface of the lingual cortex and to the base of the mandible. A higher percentage of the canals were located lingually in the prognathic group. Conclusion: This study showed that the mandibular canal was located more lingually and inferiorly in prognathic patients than in patients with normal occlusion. These results could help surgeons to reduce injuries to the inferior alveolar nerve.

• 한국치위생학회지
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• 제10권4호
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• pp.655-661
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• 2010

Objectives : This study is aimed to prevent the damage to the inferior alveolar nerve during the orthognathic surgery. Methods : The control group consist of 50 patients with class I occlusion. The experimental group consist of 50 patients with class III malocclusion. The cepalometric radiography was used to evaluate the position of the mental foramina. Results : In the first, mental foramen position of class III was more inferior 0.85 mm in the distance between base of mandible and mental foramen. But the distance between occlusal plan and mental foramen had not statistically significant. Secondly, mental foramen location of Mandibular Prognathism was more anterior 0.91 mm in the distance between coronal plane of mandible included pogonion point and mental foramen. Also, the distance of occlusal-coronal plane of mandible included central incisor and mental foramen had statistically significant. The mental foramen location of class III was more anterior 4.81 mm than class I patients. Conclusions : The result of this study could help the clinicians to apprehend fundamental data with various facial skeletal types for any related researches about the location of the mental foramina for other purposes.

• 대한치과교정학회지
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• 제43권2호
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• pp.101-109
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• 2013

Objective: To evaluate the efficiency of the Frog appliance (FA) alone or in combination with headgear for distalizing the maxillary molars. Methods: Fifty patients (25 males and 25 females) aged 12.6 - 16.7 years who received treatment for Class II malocclusion at the Orthodontic Clinic of Al-Baath University were selected for this study and randomly divided into 2 equal groups. Maxillary molar distalization was achieved using the FA alone (group 1) or a combination of the FA with high-pull headgear worn at night (group 2). Lateral cephalograms were obtained before and after treatment. Results: The maxillary molars moved distally by 5.51 and 5.93 mm in groups 1 and 2, respectively. Distal movements were associated with axial tipping by $4.96^{\circ}$ and $1.25^{\circ}$, and with loss of anchorage by mesial movement of the second maxillary premolars by 2.70 and 0.90 mm in groups 1 and 2, respectively. The combined use of the FA and nighttime high-pull headgear decreased the distalization time and improved the ratio of maxillary molar distalization movement relative to the overall opening space between the first maxillary molars and second premolars. Conclusions: The FA can effectively distalize the maxillary molars, this distalization associates with some unfavorable changes. Nighttime use of high-pull headgear combined with the FA can reduce these unfavorable changes and improve treatment outcomes.