• 제목/요약/키워드: Condylar resorption

검색결과 38건 처리시간 0.027초

전이개 접근을 이용한 하악 과두 골절의 정복 (Open Reduction of Mandibular Condyle Fracture Via Preauricular Approach)

  • 김범준;차용훈;임재형;박광호;허종기
    • Maxillofacial Plastic and Reconstructive Surgery
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    • 제32권6호
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    • pp.521-528
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    • 2010
  • Purpose: Anatomical reduction of the fractured condylar process is an important prerequisite for re-establishing function. The authors reported about effectiveness of transoral approach for mandibular subcondyle fracture using trochar device in cases that the fracture line is below the reference line, the perpendicular line of the longitudinal axis of condylar process passing the lowest point of sigmoid notch. As a serial study, we report the open reduction via preauricular approach for mandibular condyle fracture, in cases that the fracture line is above the reference line. Patients and Methods: Sixteen condylar fractures of 15 adult patients were divided two groups and treated by open reduction via preauricular approach (8 cases) or by closed reduction (8 cases). The degree of maximal mouth opening, occlusion, anatomical reduction, condylar resorption and complications were assessed and evaluated for the two groups. Results: The open reduction of condyle via preauricular approach leads to good results without permanent complications. Anatomical reduction of open reduction group and maximal mouth opening range of the closed reduction group is significantly better than the other group. No significant differences were found in the condylar resorption and the occlusion. Conclusion: The preauricular approach was useful to reduce and fix the condylar fragment, in cases that the fracture line is above the reference line.

Incidence and management of condylar resorption after orthognathic surgery: An overview

  • Barone, Selene;Cosentini, Giorgio;Bennardo, Francesco;Antonelli, Alessandro;Giudice, Amerigo
    • 대한치과교정학회지
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    • 제52권1호
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    • pp.29-41
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    • 2022
  • Objective: Condylar resorption (CR) is one of the major post-surgical complications of orthognathic surgery. This systematic review (SR) aimed to evaluate epidemiological data, risk factors, and therapeutical management of CR. Methods: Six databases were screened by two investigators until September 2020 to obtain all SRs. After reading the titles and abstracts, eligible SRs were determined and data extraction was performed. Using the latest version of A Measurement Tool to Assess Systematic Reviews, the methodological quality of the included SRs was determined. Results: Ten SRs with low or critically-low methodological quality were included in this review. Mandibular hypoplasia on the sagittal plane and hyperdivergent growth pattern on the vertical plane were the most common skeletal alterations in which CR could occur after orthognathic surgery. Post-operative condylar changes were analyzed both on two-dimensional and three-dimensional (3D) radiographic examinations. The incidence of CR was not related to the fixation method. Based on the severity of the pathological conditions, management of CR can include conservative or surgical therapy. Conclusions: Despite the limited evidence in literature, CR is considered a consequence of orthognathic surgery. However, an accurate diagnosis of CR and a better orthognathic surgical planning must include 3D radiographic examinations to improve pre- and post-surgical comparison. Well-designed studies with long-term follow-up and 3D data are needed to clarify the findings of this analysis..

악관절 흡수양상을 보이는 성인 하악 후퇴증 환자에서 양측 하악골 골신장술을 이용한 하악 전진술 (MANDIBULAR ADVANCEMENT WITH DISTRACTION OSTEOGENESIS FOR ADULT CLASS II MALOCCLUSION PATIENT WITH CONDYLAR RESORPTION)

  • 팽준영;이상우;이진용;명훈;황순정;서병무;최진영;이종호;정필훈;김명진
    • Maxillofacial Plastic and Reconstructive Surgery
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    • 제29권3호
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    • pp.217-226
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    • 2007
  • Purpose: Distraction osteogenesis is considered to take favorable effect on the TMJ and be beneficial to prevent the relapse after the mandibular advancement of Class II malocclusion patient. This is the report with literature review on the mandibular advancement in the patients showing preoperative condylar resorption and who need larger amount of advancement. Patients and method: Distraction osteogenesis using intraoral device was performed for three mandibular hypoplasia patients (one male and two females). All patients were adult over 18 years old. The patients showed condylar bony resorption preoperatively. The distraction was performed intraorally with modified SSRO. After 7 days of latency period, activation was performed at the rate of 1.0 mm/day with twice turn. The devices were removed after 4-8 month consolidation period. Results: Total advancement of mandible was average 13 mm. One patient showed openbite immediately after removal of distraction device. It took long time to guide the openbite with elastics. The comparison between cephalometries immediately after device removal and postoperative six month revealed average 3.4 mm relapse. This means that mandibular advancement with distraction osteogenesis needs overcorrection and elastic rehabilitation even after enough consolidation periods. Conclusion: Larger amount of mandibular advancement could be achieved with distraction osteogenesis in severe mandibular hypoplasia with condylar resorption. However, some relapse was found during the follow-up period and the over correction is considered to be needed. The effect of distraction osteogenesis seems to be investigated with long-term follow-up.

A follow-up study on extracorporeal fixation of condylar fractures using vertical ramus osteotomy

  • Park, Sung Yong;Im, Jae Hyoung;Yoon, Seong Hoe;Lee, Dong Kun
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • 제40권2호
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    • pp.76-82
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    • 2014
  • Objectives: The aim of this study is to report the results of extracorporeal fixation in patients with mandibular condylar fractures and compare them with the clinical results of conservative treatment. Materials and Methods: The medical records of 92 patients (73 male [M] : 19 female [F], age 13-69 years, mean 33.1 years) treated for condylar fractures at the Department of Oral and Maxillofacial Surgery in Sun Dental Hospital (Daejeon, Korea) from 2007 to 2012 were reviewed. Patients were divided into three groups: group A (23 patients; M : F=18 : 5, age 21-69 years, mean 32.6 years), treated with extracorporeal fixation; group B (30 patients; M : F=24 : 6, age 16-57 years, mean 21.1 years), treated by conventional open reduction; and group C (39 patients; M : F=31 : 8, age 16-63 years, mean 34.4 years), treated with the conservative method ('closed' reduction). Clinical and radiographic findings were evaluated and analyzed statistically. Results: Occurrence of postoperative condylar resorption correlated with certain locations and types of fracture. In this study, patients in group A (treated with extracorporeal fixation) did not demonstrate significant postoperative complications such as malocclusion, mandibular hypomobility, temporomandibular disorder, or complete resorption of condyle fragments. Conclusion: In superiorly located mandibular condyle fractures, exact reconstruction of condylar structure with the conventional open reduction technique can be difficult due to the limited surgical and visual fields. In such cases, extracorporeal fixation of the condyle using vertical ramus osteotomy may be a better choice of treatment because it results in anatomically accurate reconstruction and low risk of complications.

하악 과두 골절 환자에서 Lag-screw를 이용한 관혈적 정복 후 임상적 연구 (CLINICAL STUDIES OF LAG -SCREW OSTEOSYNTHESIS IN CONDYLAR FRACTURES OF THE MANDIBLE)

  • 정종철;송민석;최재욱;김성범;서지훈;이계혁
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • 제27권5호
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    • pp.442-446
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    • 2001
  • Purpose : This study evaluated clinical and radiographic results after open reduction and lag-screw fixation of mandibular condyle fractures. Patients and Methods : 26 patients had been treated by lag-screw fixation for madibular condyle fracures via submandibular approach and follow up for over 6 months. The lag-screw used in this study was designed by Eckelt. Results : Radiographically, resorption of the condyle head found in 4 cases (15%) and minimal displacement of the condyle head was found in 3 cases (12%). Post-operative infection were not found in all cases. Clinically, All patiens had a stable occlusion and normal mouth opening (over 40mm). TMD problems with crepitus or some discomfort encountered in 4 patients but tolerable to the patients. Conclusion : Lag screw fixation can be a good option especially high level condylar fractures, however this procedure must be used in cautiously because of slipping of the fragments and possible to resorption of the fragments.

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편측치아결손(片側齒牙缺損)이 악관절(顎關節)에 미치는 영향(影響)에 관(關)한 실험적(實驗的) 연구(硏究) (AN EXPERIMENTAL STUDY OF THE EFFECT OF THE UNILATERAL TOOTH LOSS ON THE TEMPOROMANDIBULAR JOINT)

  • 임용준
    • 대한치과보철학회지
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    • 제17권1호
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    • pp.35-46
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    • 1979
  • A number of experimental studies have been carried out in order to clarify the question as to how temporomandibular joint adapt to the changes of mandibular movement and occlusal equilibration. Recently, the studies on the interrelations between anatomical structure of temporomandibular joint and the state of occlusion have been actively performed in dentistry particularly in prosthodontic field. Author performed extraction of unilateral mandibular molars in 30 mature male rats, and observed histological changes of temporomandibular joint through the light microscope. Following results were obtained. 1. The loss of unilateral teeth gave rise to the changes in the location of condylar head, that is, interior displacement of condylar head in the extraction side and upper displacement in the non-extraction side. 2. Articular disk was compressed by the interior surface of condylar head, resulting in its extension below the condylar neck in the extraction side, and the histological arrangement of the compressed area showed irregular feature. 3. The extension of articular disk below the condylar neck was accompanied with the contraction of muscle fibers which were originated from the articular disk. 4. The cartilage layer of articular fossa to the exterior of the extraction side showed hypertropy. 5. Early in the experiment, the inernal extremity of condylar head of extract ion side showed bone resorption, and cartilage layer of condylar head showed hypertropy. At 12 weeks after experiment, the condylar surface showed flattened, and the cartilage layer of condylar head was replaced by the compact bone. 6. The articular disk showed the formation of pannus in the extraction side as well as in the non-extraction side. 7. The occlusal disturbance due to unilateral missing teeth has brought about the non-inflammatory retrogressive change and osteoarthrotic change late in the experiment.

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편측 하악 과두골절의 관혈적 치료에 있어서 예후에 영향을 줄 수 있는 인자들에 관한 임상 통계학적 연구 (CLINICO-STATISTICAL ANALYSIS OF POSSIBLE FACTORS LEADING TO PROBLEMS IN THE SURGICAL TREATMENT OF UNILATERAL MANDIBLAR CONDYLE FRACTURES)

  • 성헌모;이동근;민승기;오승환;장관식
    • Maxillofacial Plastic and Reconstructive Surgery
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    • 제23권1호
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    • pp.31-39
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    • 2001
  • The purpose of this study is to reveal the factors leading to the problem of unilateral condylar fractures and suggest a treatment guideline of treatment for good prognosis in surgical treatment. The factors can be age, sex, fracture site, degree of displacement, posterior occlusion loss, post-operative alteration of condylar head position, post-operative condylar head resorption, and maxillomandibular fixation period. One hundred and eleven patients with unilateral condylar fractures, who were treated by surgical method from 1990 Feb. to 2000 Feb., were studied. Minimum follow-up period was 6 months. The results were as follows ; 1. In the age group of $41{\sim}60$, females had significantly higher complication rate than males, therefore we must be careful about treatment of female in this age group 2. In level I fractures of the mandibular condyle, because there were abundant complications when the patients were treated with fragment removal, conservative treatment is recommended over the surgical approach. 3. There were no differences in the complication rate, in the level II, III fractures. but were severe complications in the cases of patients treated by Dr.Nam's method or fragment removal. Therefore, open reduction and internal fixation is recommended over Dr.Nam's method or fragment removal. 4. In level IV fractures, open reduction and internal fixation is recommended 5. Although there was a higher complication rate depending on the degree of deviation, there was no correlation between the degree of deviation and development of complications in each level of fracture 6. Because the complication rate was higher in cases of condylar resorption, vertical dimension loss, and alteration of condylar head position, we must make an effort to prevent such complications during treatment

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10대 하악과두흡수 환자의 임상적 평가 및 악안면 골격형태에 대한 연구 (Clinical Assessment and Cephalometric Characteristics of Patients with Condylar Resorption in Teenagers)

  • 전용현;허윤경;정재광;채종문;최재갑
    • Journal of Oral Medicine and Pain
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    • 제35권1호
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    • pp.61-73
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    • 2010
  • 2006년 한 해 동안 경북대학교 구강내과에 내원한 하악과두의 형태적 변이가 관찰된 10대 과두흡수 환자를 대상으로 임상검사와 악안면 골격형태를 분석하여 다음과 같은 결론을 얻었다. 1. 임상적 평가 1) 10대 과두흡수 환자는 59명으로 여자는 47명, 남자는 12명으로 여자에서 월등히 많이 유발되었다. 환자의 연령분포는 12세가 2명, 14세가 9명, 15세가 4명, 16세가 8명, 17세가 12명, 18세가 12명, 그리고 19세가 12명으로 나타났다. 2) 과두의 편평화나 침식, 과두형태의 변형이 초래된 Grade II를 많이 나타냈다. 3) Class I 교합자가 27명으로 가장 많았고, 개교합이 동반된 경우는 20명, 평균 overjet은 3.58mm, overbite는 0.97mm를 보였다. 4) 과두흡수 부위의 통증을 호소한 경우는 41명, 통증을 호소하지 않은 경우가 18명이었다. 5) 이갈이 습관을 26명, 이악물기 습관은 24명이 보고하였다. 6) 환자의 치료기간은 1개월 미만이 23명, 보조요법으로 치료한 경우가 28명이었다. 2. 악안면 골격 형태 평가 1) 16세 여자환자에서 SNA, SNB는 유의한 작은 값을 나타냈고 articular angle은 유의한 큰 값을 보였다. 2) 17세 여자환자에서 SN, SAr, TPFH와 ramus height가 유의한 작은 값을, SN-GoMe, FMA 그리고 articular angle은 유의한 큰 값을 나타냈다. 3) 18세 이상 여자 환자에서는 SN, SNB, TPFH, ramus height은 유의한 작은 값을, ANB, FMA, SN-GoMe, LAFH, articular angle, gonial angle은 유의성 있는 큰 값을 보였다. 4) 18세 이상 남자 환자에서는 SN, TPFH, ramus height은 유의한 작은 값을 FMA, SN-GoMe, LAFH, articular angle, gonial angle은 유의성 있는 큰 값을 보였다. 5) mandibular body length는 10대 과두흡수 환자에서 정상인과 차이가 없었다. 10대 과두흡수의 특징은 임상적으로 통증호소는 심하지 않으나 골소실이 빠르게 일어나서 이환측 과두에서 후방지지의 갑작스런 상실이 초래되는 특발성 과두흡수의 형태를 많이 나타내며 개교합 발생 비율도 높았다. 근골격계 성장이 완료되지 않은 10대에 특히 수직적 악안면 골격형태로 인한 부하의 집중과 이상기능활동에 의해 하악과두에 과도한 부하가 가해지면 과두흡수가 더욱 쉽게 일어날 수 있으며, 결국 악골의 성장을 저해하고 안모에 악영향을 미칠 수 있을 것으로 생각한다.

Three-dimensional cone beam computed tomography analysis of temporomandibular joint response to the Twin-block functional appliance

  • Jiang, Yuan-yuan;Sun, Lian;Wang, Hua;Zhao, Chun-yang;Zhang, Wei-Bing
    • 대한치과교정학회지
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    • 제50권2호
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    • pp.86-97
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    • 2020
  • Objective: To propose a three-dimensional (3D) method for evaluating temporomandibular joint (TMJ) changes during Twin-block treatment. Methods: Seventeen patients with Class II division 1 malocclusion treated using Twin-block and nine untreated patients with a similar malocclusion were included in this research. We collected their cone beam computed tomography (CBCT) data from before and 8 months after treatment. Segmentations were constructed using ITK-SNAP. Condylar volume and superficial area were measured using 3D Slicer. The 3D landmarks were identified on CBCT images by using Dolphin software to assess the condylar positional relationship. 3D models of the mandible and glenoid fossa of the patients were constructed and registered via voxel-based superimposition using 3D Slicer. Thereafter, skeletal changes could be visualized using 3DMeshMetric in any direction of the superimposition on a color-coded map. All the superimpositions were measured using the same scale on the distance color-coded map, in which red color represents overgrowth and blue color represents resorption. Results: Significant differences were observed in condylar volume, superficial area, and condylar position in both groups after 8 months. Compared with the control group (CG), the Twin-block group exhibited more obvious condyle-fossa modifications and joint positional changes. Moreover, on the color-coded map, more obvious condyle-fossa modifications could be observed in the posterior and superior directions in the Twin-block group than in the CG. Conclusions: We successfully established a 3D method for measuring and evaluating TMJ changes caused by Twin-block treatment. The treatment produced a larger condylar size and caused condylar positional changes.

하악 과두 골절에 대한 4년간의 후향적 임상연구 (A RETROSPECTIVE CLINICAL STUDY OF CONDYLAR FRACTURES OF THE MANDIBLE IN A 4-YEAR PERIOD)

  • 류재영;김현섭;박충열;국민석;박홍주;오희균
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • 제34권3호
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    • pp.388-397
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    • 2008
  • The present study was performed to evaluate the function of the mandible according to the pattern of fracture and treatment methods of condylar fractures of the mandible and help operators in making a treatment plan. Sixty patients (average follow-up period was $7.8{\pm}9.4$ months) who were treated for condylar fracture from June, 2002 to May, 2006 at the Department of Oral and Maxillofacial surgery, Chonnam National University Hospital were reviewed. The common causes of the condylar fracture were traffic accident and fall-down (35.0%). In concomitant injuries, laceration was 46.7% and the fracture of the mandibular symphysis was highest incidence (60.0%). The common site of the fracture was the condylar head (47.8%), followed by subcondyle (36.2%) and condylar neck (15.9%). Under 15 years old patients, the closed reduction was performed in 87.5% out of the patients. All of the condylar fragments were fixed to the mandible with titanium miniplates in cases of open reduction. The mean period of intermaxillary fixation (IMF) was $14.2{\pm}6.5$ days in closed reduction and $10.0{\pm}4.2$ days in open reduction. The old patient with bilateral condylar head fractures, who were treated by closed reduction with IMF for 3 weeks, showed the limitation of mandibular movements. But, there was no significant different results between open reduction and closed reduction with the respect of the Helkimo's mandibular mobility index and clinical dysfunction index (DI). Complications, such as fibrous ankylosis and resorption of the mandibular condyle, were not observed in all patients. These results suggest that the good results can be obtained by closed reduction with proper IMF periods and functional exercise in most condylar fractures of the mandible except severely displaced extracapsular fractures.