复发与初发性牙源性角化囊肿临床、X线及组织病理学特点对比研究

目的　研究复发性牙源性角化囊肿的临床、X线和组织病理学特征。方法　对 2 1例复发性角化囊肿与其初发性角化囊肿的临床、X线和组织病理学表现进行对比分析。结果　 2 1例中 17例仅复发一次 ,5年内复发者 14例 ,复发时年龄在 10～ 2 9岁间的患者有 13例。 4例二次复发 ,3年内复发者 3例。复发性囊肿以单房影像为主 ,5例呈多房影像的初发囊肿复发时仍为多房病损。复发性囊肿组织病理学表现以典型不全角化型为主。结论　角化囊肿多在术后 5年内复发 ,低年龄组中初发囊肿体积较大、呈多房表现者复发率较高。应首选刮切术及全部拔除病变涉及的患牙。角化囊肿可能存在着不同的生长特性。     

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牙源性囊肿是一组常见于颌骨内的良性病变,一般可根据临床体征和影像学发现作出初步诊断。颌骨牙源性囊肿的手术治疗方法应根据囊肿类型、患者年龄、病变大小及罹患部位等决定。青少年含牙囊肿,预期囊内含牙可自行萌出者,可采用袋形术。病变范围较小的颌骨牙源性囊肿,刮除术为最好的治疗方法。若根尖周囊肿的病源牙可保留,术前应完成根管治疗。术中辅以Carnoy液处理囊壁可减少角化囊肿术后复发。破坏范围大的颌骨牙源性囊肿可选择第一期袋形术,第二期刮除术,有利于减少邻近结构的损伤。颌骨切除术较少应用于治疗颌骨囊肿,主要适应证是病变破坏范围大,多次复发的牙源性角化囊肿。     

牙源性角化囊肿感染及与术后并发症、复发间关系初探

84例牙源性角化囊肿 ,通过临床 X线 ,术后组织病理观察 ,对其感染 ,感染与术后并发症 ,与复发间关系进行初探。结果显示 :角化囊肿感染率高达 6 5 .5 % ,临床颌骨囊肿伴感染时 ,应考虑到角化囊肿可能性大。术前囊肿伴感染者术后并发症的发生远高于术前无感染者 ,两组间差异显著 (P<0 .0 5 )。故角化囊肿应注意给予抗感染治疗。但术前伴感染者与非感染者相比 ,复发率无明显差异。显示牙源性角化囊肿的炎性感染与复发间的内在联系 ,是值得进一步探讨的课题     

开窗减压术联合刮治术治疗下颌骨大型牙源性角化囊性瘤

目的 观察对下颌骨大型牙源性角化囊性瘤采用一期开窗减压术联合二期刮治术术后骨腔的影像学改变,探讨该术式的可行性.方法 下颌骨大型牙源性角化囊性瘤16例,进行一期开窗减压术联合二期刮治术治疗,定期复查曲面断层X线片,观察骨腔的改变.结果 经过8～16个月的观察,所有患者一期手术后病变骨腔逐渐向开窗部位缩小,骨腔密度逐渐增高,最终在开窗部位形成小骨腔;二期手术后约3个月,病变区骨密度与正常下颌骨一致.随访3～8年,所有病例均未见复发.结论 一期开窗减压术联合二期刮治术是治疗大型下颌骨牙源性角化囊性瘤的可行术式.     

保守治疗牙源性角化囊肿的初步探讨

目的:探讨保守治疗牙源性角化囊肿的可行性和临床意义。方法:对我院近几年收治的囊肿较大、多发或不愿作根治术的12名患者,行彻底刮治术加开窗术的保守治疗,术后佩带塞治器,观察其疗效和复发率。结果:术后0.5～1年X线显示9例原病变区有大量新生骨质沉积,3例无明显疗效,有效率为75%,随访1～3年,复发4例,复发率为33.3%。结论:牙源性角化囊肿保守治疗有一定临床疗效,但尚需降低复发率。     

减压术治疗青少年下颌骨大型角化囊性瘤的疗效分析

目的:探讨和评估减压术在青少年下颌骨大型牙源性角化囊性瘤治疗中的应用效果.方法:选择2005年2月-2011年2月15例下颌骨大型牙源性角化囊性瘤患者,平均年龄19.3岁,采用开窗减压术治疗,2～3个月定期随访,复拍全景片.6～12个月随访,复拍CT,囊肿直径缩小至2 cm左右时行二期囊肿刮除术.结果:减压期12～18个月,平均13.6个月.影像学显示囊肿周围新骨再生,平均囊肿缩小比例6个月时为41.5％,12个月时为61.5％,18个月时为81.8％.二期刮除术后随访1～5a,无复发病例.结论:减压术是治疗青少年下颌骨大型牙源性角化囊性瘤的首选方法.     

减压术治疗下颌骨大型牙源性角化囊肿的临床研究

目的：评价减压术治疗下颌骨大型牙源性角化囊肿的疗效。方法：回顾1999年10月至2004年10月61例经减压术治疗的下颌骨大型角化囊肿病例．随访6个月～5a，进行临床、影像学及病理学检查，在全景片上测量减压术后病灶的长径变化，评价临床疗效．随访观察复发情况：采用SAS6．12统计软件包进行X^2检验，计算Fisher确切慨率。结果：临床及影像学检查显示，囊肿周同骨质再生改建，囊腔逐渐缩小．被推移的下牙槽神经血管束恢复至正常位置，倾斜移位的牙长轴逐渐纠正减乐术后引流期维持6～23个月，中位时间14个月。减压术治疗颌骨大型角化囊肿的有效率为91．8％，单房型角化囊肿的疗效优于多房型，不同年龄组间的有效率在统计学上无显著差异。本组资料随访期间未发现复发。结论：减乐术是治疗下颌骨大型牙源性角化囊肿的有效方法。     

低温等离子射频消融技术在牙源性角化囊性瘤治疗中的应用

目的:探讨低温等离子射频消融技术联合开窗减压术,治疗下颌骨牙源性角化囊性瘤的疗效。方法 :对16例病变范围>3 cm的下颌骨牙源性角化囊性瘤患者,采用低温等离子射频消融技术消融囊壁组织,并行开窗减压术,术后3、6、12月复查,观察复发率及囊腔缩小情况。结果 :16例下颌骨牙源性角化囊性瘤经低温等离子射频消融技术结合开窗减压术治疗后,均取得较好疗效,临床及影像学检查显示,囊肿周围骨质再生改建,囊腔逐渐缩小。随访时间10~28个月,随访期间未见复发。结论 :低温等离子射频消融技术治疗下颌骨牙源性角化囊性瘤具有简单、微创、并发症少等优势,是治疗下颌骨牙源性角化囊性瘤的一种安全有效的治疗方法。     

下颌骨囊肿术后骨腔长期未愈2例

颌骨囊肿术后不完全骨愈合偶见于上颌骨,骨缺损区被瘢痕组织部分或全部填充,可能误诊为囊肿复发。本文报道两例下颌升支区牙源性角化囊肿术后长期残留的骨腔。1临床资料病例1,女,49岁。因右侧升支区肿胀不适1月就诊。患者于6年前罹患右下颌骨牙源性角化囊肿,病变累及右下颌升支及下颌体后份(图1a),经口外进路接受囊肿剜除术。近一月感右下颌区肿胀不适。入院后临床检查发现右侧腮     

开窗减压术治疗大型牙源性角化囊性瘤的临床研究

目的 :探讨开窗减压术治疗颌骨大型牙源性角化囊性瘤的临床价值。方法 :对22例牙源性角化囊性瘤进行开窗减压术,定期随访,待囊腔直径缩小至1~2 cm或连续观察3个月无明显变化时,行二期囊肿刮除术。结果:开窗减压期为3~24个月,影像学显示囊腔周围新骨再生,颌骨形态改建。二期刮除术后随访6~48个月,无复发病例。结论:开窗减压术是一种安全、有效微创治疗颌骨大型牙源性角化囊性瘤的方法。     

Recurrence of keratocysts. A long-term follow-up study

The aim of the study was to investigate the recurrence rate of keratocysts based on a material with a follow-up of at least 5 years, and to evaluate the relationship between different features of these cysts and their recurrence. It was found that of 75 keratocysts with follow-up times ranging from 5 to 17 years (mean 8.3), 32 (43%) recurred. The cumulative recurrence rate of the 67 annually examined cysts increased from 3% after the 1st year following the operation to 37% after the 3rd year. Thereafter, no new recurrences were noted. Recurrence of keratocysts in patients with basal cell nevus syndrome occurred more frequently than that of patients without the syndrome. Keratocysts enucleated in one piece recurred significantly less often than cysts enucleated in several pieces. The recurrence rate of keratocysts with a clinically observable infection, with fistula or with a perforated bony wall was higher than that of keratocysts without these features. Recurrence was also found more frequently in cysts with multilocular radiographic appearance than in unilocular cysts. The size or the location of the keratocysts did not have an influence on the recurrence rate.     

The odontogenic keratocyst. A clinicopathologic study of 312 cases. Part I. Clinical features.

An analysis was made of the clinical features of 312 acceptable cases of odontogenic keratocysts from the files of the Department of Oral Pathology, Indiana University School of Dentistry. A total of 5.1 per cent of the keratocysts were from patients with the basal-cell nevus syndrome and 5.8 per cent were from patients with multiple keratocysts but with no other features of the syndrome. There was a wide age range, with a peak incidence in the second and third decades of life. The mandible: maxilla ratio was 2:1, with the mandibular third molar area and ramus being the most common sites. Dentigerous cyst was the most frequent clinical as well as histologic diagnosis for the majority of the keratocysts in this study. The primordial cyst comprised the greatest percentage of keratocysts (44.4 per cent). A total of 50.3 per cent of the patients were symptomatic before seeking treatment, the most common finding being intraoral drainage and swelling. Their radiographic appearance was quite variable, although they frequently resembled ameloblastoma. These cysts may be very aggressive clinically. They have a relatively high recurrence rate, as previously reported in the literature, in comparison with other types of odontogenic cyst. The findings in this study support the theory that the histologic appearance of an odontogenic keratocyst may be assumed by any of the odontogenic or nonodontogenic cysts.     

牙源性角化囊肿细胞增殖抗原和表皮生长因子受体表达

目的　探讨牙源性角化囊肿衬里上皮细胞的增殖特点。方法　采用免疫组化染色方法 ,对牙源性角化囊肿、成釉细胞瘤、含牙囊肿、正常口腔粘膜上皮中细胞增殖抗原 Ki- 6 7和表皮生长因子受体 (EGFR)的表达进行分析比较。结果　牙源性角化囊肿中 Ki- 6 7表达较含牙囊肿高 ,与正常口腔上皮相似 ;复发的与未复发的牙源性角化囊肿 Ki- 6 7指数无显著性差异。牙源性角化囊肿中 EGFR表达呈阳性。结论　牙源性角化囊肿上皮增殖活跃 ,上皮增殖生长可能与表皮生长因子家族有关。     

Range and demographics of odontogenic cysts diagnosed in a UK population over a 30-year period

BACKGROUND: The aim of this study was to determine the range of all histologically diagnosed odontogenic cysts along with age range, sex distribution and site of presentation over a 30-year period. METHODS: All entries for odontogenic cysts occurring during 1975-2004 inclusive were retrieved and analysed for demographic data. RESULTS: A total of 55,446 specimens were received, of these 7121 (12.8%) specimens were diagnosed as odontogenic cysts. Radicular cyst was the most common diagnosis (52.3%), followed by dentigerous cyst (18.1) and odontogenic keratocysts (11.6%). CONCLUSIONS: Our study provides demographic data on a large series of odontogenic cysts in a European population. This is one of the largest series reported to date. Cysts such as the paradental cyst have a predilection for certain ages, sexes and sites. Odontogenic keratocysts and glandular odontogenic cysts have a marked propensity to recur as well as behave aggressively. It is essential that such lesions are detected as early as possible to minimize any necessary surgery.     

牙源性囊肿上皮增殖活性的研究

目的：研究牙源性角化囊肿,含牙囊肿,根尖囊肿3种主要的牙源性囊肿衬里上皮的细胞增殖活性,方法：应用Ki-67单克隆抗体免疫组化LSAB法对30例牙源性囊肿进行免疫组化染色,结果通过计算机图像分析,计算单位面积衬里上皮内（mm2)阳性细胞数,进行统计学分析,结果：牙源性角化囊肿衬里上皮有较多的Ki-67阳性细胞,明显高于含牙囊肿和根尖囊肿;正常口腔粘膜未见Ki-67阳性表达,结论：Ki-67在不同的牙源性囊肿中表达的差异显示了它们具有不同的增殖和分化过程。     

A comparative study of odontogenic keratocysts associated with and not associated with an impacted mandibular third molar

OBJECTIVE: The purpose of this study was to compare odontogenic keratocysts associated with and not associated with an impacted mandibular third molar. STUDY DESIGN: Panoramic radiographs of odontogenic keratocysts associated with impacted mandibular third molars (15 cysts, associated group) were compared with radiographs of odontogenic keratocysts not associated with impacted mandibular third molars (25 cysts, nonassociated group). The radiographic images were analyzed with reference to the patients' age and sex. RESULTS: The mean age of patients in the associated group was lower than that of patients in the nonassociated group. The mean area of the cysts in the associated group was larger than that of those in the nonassociated group. The patients' ages did not significantly correlate to the areas of either kind of cyst. CONCLUSIONS: The odontogenic keratocysts in the associated group had a tendency toward rapid growth in the patients' youth.     

Treatment of odontogenic keratocysts: a follow-up of 255 Chinese patients

OBJECTIVE: The purpose of this study was to report our experience in the surgical treatment of 484 Chinese patients with follow-up in 255 cases. METHODS: A retrospective analysis was conducted of all odontogenic keratocysts that were surgically treated and histopathologically diagnosed between 1962 and 1998. The odontogenic keratocysts were surgically treated with enucleation, marsupialization followed by secondary enucleation, and resection with or without continuity defects. The recurrence rate was evaluated for the patients followed more than 3 years. RESULTS: Of a total of 489 odontogenic keratocysts, 327 (66.87%) were found in the mandible and 162 (33.13%) in the maxilla. Follow-up data were obtained in 255 patients. Recurrence was found in 31 cases (15.27%) in 203 patients treated with enucleation after an observation period of 3 to 29 years. Twenty-nine recurrences (17.79%) were found in 163 patients treated with enucleation alone, two recurrences (6.70%) were seen in 29 patients who received Carnoy's solution fixation of the cyst wall before enucleation, and no recurrence was found in 11 cases treated with marsupialization in combination with secondary enucleation. No recurrence was seen in 52 patients treated with resection. CONCLUSION: Odontogenic keratocysts treated with enucleation alone have a higher recurrence rate. Enucleation with adjunctive treatment can decrease recurrence rate. Radical excision has no recurrence but does have the highest morbidity rate and should be reserved for multiple recurrent cysts after conservative means.     

Metaplasia and degeneration in odontogenic cysts in man

Abstract. In a histologic study of the walls of 638 odontogenic cysts, the incidence of metaplastic and/or degenerative changes was recorded. There were 402 denial cysts, 81 dentigerous cysts, 15 lateral periodontal cysts, 1 gingival cyst and 139 odontogenic keratocysts.
Mucus cells were present in 39.6 % of the dental cysts, 42.0 % of the dentigeious cysts, 20.0 % of the lateral periodontal cysts and 3.7 % of the odontogenic keratocysts. There was no difference in incidence between the maxilla and mandible. The incidence of mucus cells increased with the age of the patient from whom the cyst was removed. Ciliated cells were present in 0.7 % of the dental cysts and 1.5 % of the odontogenic keratocysts, but were absent from dentigerous cysts and lateral periodontal cysts. Keratin was present in 2.0 % of the dental cysts, 2.5 % of the dentigerous cysts, and all of the odontogenic keratocysts, but was absent from lateral periodontal cysts. Hyaline bodies were present in 6.7 % of the dental cysts, 1.2 % of the dentigerous cysts, none of the lateral periodontal cysts and 9.4 % of the odontogenic keratocysts. Mineralized bodies were present in 2.5 % of the dental cysts, 7.4 % of the dentigerous cysts, 6.7 % of the lateral periodontal cysts and 12.9 % of the odontogenic keratocysts. The origin of these changes is discussed in the light of these findings.     

Odontogenic keratocysts. A follow-up study of 29 cases

This study reports the incidence and recurrence rate of odontogenic keratocysts in a series of 531 jaw cysts treated at the Department of Oral Surgery, Karolinska Institute, Stockholm, from 1977 to 1984. Each case of a histologically verified odontogenic keratocyst was analysed and registered with respect to patient's age and sex, type of cyst, location and rate of recurrence. Twenty-nine odontogenic keratocysts were found (5.4% of all cysts). The most frequent locations were in the mandibular angle, ramus and third molar regions. During the observation period (1-8 years) 7 keratocysts (24%) recurred. These findings support previous observations.