This study was undertaken to examine which factors contributed to the correction of crowding in two patients who underwent nonextraction orthodontic treatment. A study model analysis was conducted to determine the eff...This study was undertaken to examine which factors contributed to the correction of crowding in two patients who underwent nonextraction orthodontic treatment. A study model analysis was conducted to determine the effects of the orthodontic treatment for crowding with high canines on crown angulation and dental arch width in two patients. The results showed that the crown angulation was significantly increased, indicating distal tipping in the maxillary dental arch. This tendency was most commonly observed in the premolars among the lateral teeth. With respect to the dental arch width, the largest change was evident in the first molar and first premolar regions in cases 1 and 2, respectively. On the basis of these results, up-righting of mesially tipped lateral teeth and expansion of narrow dental arches could prove to be the keys to the success of space regaining or correction of high canines and mild crowding.展开更多
目的:对比高嵌体与全冠在修复牙体缺损中的美学效果及预后。方法:选取2020年6月-2022年1月笔者医院收治的牙体缺损患者120例(共229颗患牙),采用随机数字法分为对照组(60例,113颗患牙)和观察组(60例,116颗患牙),对照组采用常规全瓷冠修...目的:对比高嵌体与全冠在修复牙体缺损中的美学效果及预后。方法:选取2020年6月-2022年1月笔者医院收治的牙体缺损患者120例(共229颗患牙),采用随机数字法分为对照组(60例,113颗患牙)和观察组(60例,116颗患牙),对照组采用常规全瓷冠修复治疗,观察组采用CAD/CAM全瓷高嵌体修复治疗,观察两组的修复时间(备牙时间、取模时间和总体操作时间),治疗后第6个月、12个月及18个月的修复效果,以及治疗前、治疗后第3个月牙周指标及龈沟液生化指标[C反应蛋白(C-reactive protein,CRP)、人CXC趋化因子配体16(CXC chemokine ligand 16,CXCL16)、白细胞介素1β(Interleukin-1β,IL-1β)]变化,对比两组牙齿美观满意度。结果:观察组备牙时间、取模时间和总体操作时间均显著低于对照组(P<0.05);观察组、对照组治疗后第6个月、12个月、18个月修复优良率分别为100% vs 100%、97.41% vs 85.84%、96.55% vs 83.19%,两组治疗后12、18个月比较差异有统计学意义(P<0.05);治疗后第3个月,两组出血指数(Bleeding index,BI)、菌斑指数(Plaque index,PLI)、牙龈指数(Gingival index,GI)及龈沟液CRP、CXCL16、IL-1β水平均显著降低(P<0.05),且观察组显著低于对照组(P<0.05),两组咀嚼能力显著升高,且观察组显著高于对照组(均P<0.05);观察组患者对修复体满意度(98.34%)显著高于对照组(81.67%)(P<0.05)。结论:CAD/CAM全瓷高嵌体技术应用于修复牙体缺损临床效果显著,可明显改善牙周情况及炎症反应,远期修复效果好,美观度高,患者满意度高,值得临床推广应用。展开更多
<b><span>Objective:</span></b><span> This study aimed to evaluate the age, gender, causes, place of trauma, and type of crown fracture in permanent dentition among patients </span>&...<b><span>Objective:</span></b><span> This study aimed to evaluate the age, gender, causes, place of trauma, and type of crown fracture in permanent dentition among patients </span><span>attending Liaquat University of Medical and Health Sciences Hospital (LUMHS)</span><span>, Jamshoro, Pakistan.</span><span> </span><b><span>Methodology:</span></b><span> This cross-sectional study was conducted at the Operative Dentistry Department of LUMHS hospital over a period of six months. All patients (6</span><span> </span><span>-</span><span> </span><span>40 years of age) who had a history of dental trauma and attending dental OPD were included in this study. The data for all patients were recorded in a predesigned proforma. Data were collected on age, gender, place of trauma (playground, road, home), cause of trauma (fall, playing, road accident, bicycle accident, collisions, fighting) and associated symptoms. The data w</span><span>ere</span><span> analyzed using SPSS 22.0. Mean and the standard deviation w</span><span>as </span><span>computed for a quantitative variable like age. Frequency and percentage were calculated for qualitative variables like gender, risk factors, and pattern of trauma. </span><b><span>Results:</span></b><span> A total of 82 patients were enrolled. The most frequent age group involved was 13</span><span> </span><span>-</span><span> </span><span>20 years (46%) with males (58.5%) predominance. The majority of trauma cases were due to fall (36.6%) while playing and 19.5% were bicycle accidents. The most commonly affected tooth was right maxillary central incisor (46.6%) followed by left maxillary central incisor (28.4%). Of the 116 teeth examined, 56.0% had a complicated crown fracture and 44.0% had an uncomplicated crown fracture</span><span>. </span><b><span>Conclusion:</span></b><span> </span><span>Safety measures should be implemented where dental traumatic accidents occur most frequently like </span><span>at</span><span> </span><span>home and on the roads.</span>展开更多
Dental crowns are best utilized as a way to improve the cosmetics of a tooth appearance when the crown simultaneously serves other purposes also, such as restoring a tooth to its original shape or strengthening a toot...Dental crowns are best utilized as a way to improve the cosmetics of a tooth appearance when the crown simultaneously serves other purposes also, such as restoring a tooth to its original shape or strengthening a tooth. The study presents four different designs of molar crown depending upon the tooth loss. The finite element results obtained suggests that restored material which fills the treated cavity along with small portion of root canal can help in retaining the restored tooth and can allow larger deformations for stresses induced well within the limit.展开更多
文摘This study was undertaken to examine which factors contributed to the correction of crowding in two patients who underwent nonextraction orthodontic treatment. A study model analysis was conducted to determine the effects of the orthodontic treatment for crowding with high canines on crown angulation and dental arch width in two patients. The results showed that the crown angulation was significantly increased, indicating distal tipping in the maxillary dental arch. This tendency was most commonly observed in the premolars among the lateral teeth. With respect to the dental arch width, the largest change was evident in the first molar and first premolar regions in cases 1 and 2, respectively. On the basis of these results, up-righting of mesially tipped lateral teeth and expansion of narrow dental arches could prove to be the keys to the success of space regaining or correction of high canines and mild crowding.
文摘目的:对比高嵌体与全冠在修复牙体缺损中的美学效果及预后。方法:选取2020年6月-2022年1月笔者医院收治的牙体缺损患者120例(共229颗患牙),采用随机数字法分为对照组(60例,113颗患牙)和观察组(60例,116颗患牙),对照组采用常规全瓷冠修复治疗,观察组采用CAD/CAM全瓷高嵌体修复治疗,观察两组的修复时间(备牙时间、取模时间和总体操作时间),治疗后第6个月、12个月及18个月的修复效果,以及治疗前、治疗后第3个月牙周指标及龈沟液生化指标[C反应蛋白(C-reactive protein,CRP)、人CXC趋化因子配体16(CXC chemokine ligand 16,CXCL16)、白细胞介素1β(Interleukin-1β,IL-1β)]变化,对比两组牙齿美观满意度。结果:观察组备牙时间、取模时间和总体操作时间均显著低于对照组(P<0.05);观察组、对照组治疗后第6个月、12个月、18个月修复优良率分别为100% vs 100%、97.41% vs 85.84%、96.55% vs 83.19%,两组治疗后12、18个月比较差异有统计学意义(P<0.05);治疗后第3个月,两组出血指数(Bleeding index,BI)、菌斑指数(Plaque index,PLI)、牙龈指数(Gingival index,GI)及龈沟液CRP、CXCL16、IL-1β水平均显著降低(P<0.05),且观察组显著低于对照组(P<0.05),两组咀嚼能力显著升高,且观察组显著高于对照组(均P<0.05);观察组患者对修复体满意度(98.34%)显著高于对照组(81.67%)(P<0.05)。结论:CAD/CAM全瓷高嵌体技术应用于修复牙体缺损临床效果显著,可明显改善牙周情况及炎症反应,远期修复效果好,美观度高,患者满意度高,值得临床推广应用。
文摘<b><span>Objective:</span></b><span> This study aimed to evaluate the age, gender, causes, place of trauma, and type of crown fracture in permanent dentition among patients </span><span>attending Liaquat University of Medical and Health Sciences Hospital (LUMHS)</span><span>, Jamshoro, Pakistan.</span><span> </span><b><span>Methodology:</span></b><span> This cross-sectional study was conducted at the Operative Dentistry Department of LUMHS hospital over a period of six months. All patients (6</span><span> </span><span>-</span><span> </span><span>40 years of age) who had a history of dental trauma and attending dental OPD were included in this study. The data for all patients were recorded in a predesigned proforma. Data were collected on age, gender, place of trauma (playground, road, home), cause of trauma (fall, playing, road accident, bicycle accident, collisions, fighting) and associated symptoms. The data w</span><span>ere</span><span> analyzed using SPSS 22.0. Mean and the standard deviation w</span><span>as </span><span>computed for a quantitative variable like age. Frequency and percentage were calculated for qualitative variables like gender, risk factors, and pattern of trauma. </span><b><span>Results:</span></b><span> A total of 82 patients were enrolled. The most frequent age group involved was 13</span><span> </span><span>-</span><span> </span><span>20 years (46%) with males (58.5%) predominance. The majority of trauma cases were due to fall (36.6%) while playing and 19.5% were bicycle accidents. The most commonly affected tooth was right maxillary central incisor (46.6%) followed by left maxillary central incisor (28.4%). Of the 116 teeth examined, 56.0% had a complicated crown fracture and 44.0% had an uncomplicated crown fracture</span><span>. </span><b><span>Conclusion:</span></b><span> </span><span>Safety measures should be implemented where dental traumatic accidents occur most frequently like </span><span>at</span><span> </span><span>home and on the roads.</span>
文摘Dental crowns are best utilized as a way to improve the cosmetics of a tooth appearance when the crown simultaneously serves other purposes also, such as restoring a tooth to its original shape or strengthening a tooth. The study presents four different designs of molar crown depending upon the tooth loss. The finite element results obtained suggests that restored material which fills the treated cavity along with small portion of root canal can help in retaining the restored tooth and can allow larger deformations for stresses induced well within the limit.
