Early-diverging Titanosauriform(Dinosauria,Sauropoda)Teeth from the Lower Cretaceous Yixian Formation of Southeastern Inner Mongolia,Northeast China

Three eusauropod teeth(SDUST-V1064,PMOL-AD00176,PMOL-ADt0005)are reported from the Lower Cretaceous Yixian Formation of Ningcheng,southeastern Inner Mongolia,China.Two of them(SDUST-V1064,PMOL-AD00176)are assigned to early-diverging titanosauriforms in having slightly mesiodistal expansion at the base of the tooth crown,a slenderness index value>2.0 and<4.0,and D-shaped cross section.Furthermore,SDUST-V1064 and PMOL-AD00176 are referred as an Euhelopus-like titanosauriform on the basis of having a sub-circular boss on the lingual surface and an asymmetrical crown-root margin which slants apically,respectively.CT scan data of SDUST-V1064 reveals new dental information of early-diverging titanosauriforms,for example,the enamel on the labial side thicker than that on the lingual side,an enamel/dentine ratio of 0.26 and a boss present on the lingual side of the dentine of the crown.

Clinical efficacy,bone density,and follow-up in implant and orthodontic treatment for inclined adjacent teeth

BACKGROUND Tooth defects can cause elongation of occlusal teeth,leading to insufficient repair space.The combination of dental implant restoration and orthodontic treatment of oblique adjacent teeth has a significant therapeutic effect.AIM To explore clinical efficacy,bone density,and follow-up of implant and orthodontic treatment for patients with inclined adjacent teeth.METHODS In total,98 patients with oblique adjacent teeth were randomly assigned to implant restoration combined with orthodontic treatment(group A,n=49)or to receive implant restoration alone(group B,n=49).Changes in alveolar ridge bone density and apical bone density were observed before and after treatment in the two groups.Changes in chewing function and language function were compared between the two groups of patients.Follow-up lasted for 12 mo after repair to observe any adverse reactions in the oral cavity.RESULTS The clinical effective rates of group A and group B were 97.96%and 85.71%,respectively,with group A having a higher clinical effective rate than group B.After treatment,the bone density of the alveolar ridge and apical bone in both groups decreased compared to before treatment,while the chewing and language functions improved.The changes in various indicators in group A were more significant.After treatment,the satisfaction rate of group A(97.96%)was higher than that of group B(79.59%).The incidence of adverse reactions in group A(2.04%)was lower than that in group B(24.49%).CONCLUSION The amalgamation of implant restoration and orthodontic treatment for adjacent tilted teeth demonstrates notable clinical efficacy,diminishes alveolar bone resorption,and fosters patient functional rehabilitation while exhibiting negligible adverse reactions.

Evaluation of the Effectiveness and Safety of One-Time Endodontics in the Treatment of Chronic Apical Periodontitis with Sinus Tract in Pediatric Deciduous Teeth

Objective:To observe the effectiveness and safety of one-time endodontics in the treatment of chronic apical periodontitis with sinus tract in pediatric deciduous teeth.Methods:109 cases of children with chronic apical periodontitis with sinus tract in the deciduous teeth treated in our hospital from January 2022 to December 2023 were selected and grouped by the randomized numerical table method,with 54 cases in the experimental group and 55 cases in the control group.The experimental group was treated with one-time endodontics and the control group was treated with conventional endodontics.Results:After the treatment,the total effective rate of treatment was higher in the experimental group than in the control group(P<0.05);the incidence of adverse events was lower in the experimental group than in the control group(P<0.05);the satisfaction of the children's family members was higher in the experimental group than in the control group(P<0.05);the pain duration was lower in the experimental group than in the control group(P<0.05).Conclusion:In the experimental group,children with chronic apical periodontitis with sinus tract of the deciduous teeth were given one-time endodontic treatment,and the results of its implementation were relatively good.

A simplified approach for negative skin friction calculation of special-shaped pile considering pile-soil interaction under surcharge

A simplified approach was proposed to analyze the negative skin friction calculation of special-shaped pile considering pile-soil interaction under surcharge. Based on the concentric cylinder shearing theory, considering the changes of pile shape(such as, taper angle and diameters of pile base, etc.), the load-transfer of special-shaped pile was built. The accuracy of the developed simplified approach was verified by numerical simulation model with the same condition. Then, the influence factors, such as, taper angles, the diameter of pile base, surcharge, and pile-soil interface parameters were analyzed and discussed. The results show that the developed simplified approach can calculate NSF of special-shaped pile under surcharge effectively. A limited parametric study indicates that in many practical situations special-shaped piles(such as belled wedge pile shown in this work) offer a design option that is more economical than traditional uniform cross-section piles.

Experimental Study on Seismic Behavior of Exterior Joints of Special-shaped Columns with Different Lengths of Limbs

Four exterior joints with special-shaped columns which have different lengths of limbs are tested under low cyclic loading. Speeial-shaped columns adopted are L- and T-shaped in section. It can be concluded that crack pattern, failure mode and shear strength of joints are affected by the length of limb, and that shear strength and ductility increase with the length of limb; the joints with the flexural failure of the beam have better seismic behavior than those with the shear failure of the joint core.

Design of Special-shaped Interchange between Expressway and Urban Road in Mountainous Cities

Driven by the rapid economic development,the development of transportation in China has begun to move towards mountainous areas.The climate environment,topography and landform of mountainous cities are different from those of plain areas.In mountainous cities,the area of opposite interchanges between expressways and urban roads is generally large,which has a certain contradiction with the topographic conditions of mountainous cities.Therefore,it is necessary to reasonably design the opposite interchanges between expressways and urban roads in mountainous cities.The author explores and analyzes the factors restricting the special-shaped interchange between expressway and urban road in mountainous cities and the main fbnns of special-shaped interchange,and puts forward a reasonable design scheme,hoping to make a smooth development of the special-shaped interchange in mountainous cities.

Optimization design of conical reaction teeth of shear wave vibroseis vibration plate

The vibrator plate is the link between the vibroseis vehicle and the earth,as well as the core com-ponent of the vibrator vehicle.In this paper,the coupling effect between the vibrator plate and the earth is an-alyzed from two aspects of reaction tooth arrangement and reaction tooth conical angle,and three groups of experimental models are optimized and designed.The model construction and numerical analysis of the shear wave vibroseis vibrator plate are carried out with ANSYS software.The motion law between the vibration plate and the earth at work was studied,the strain energy of the three experimental models in operation,the maximum displacement of particle at the same position and other reference indices were compared and ana-lyzed,with 28 conical reaction teeth were arranged on both sides.The coupling effect between the vibration plate and the earth was best when the tooth angle was 60°.Compared with the toothless vibration plate,the energy efficiency is improved by about 20%,and the coupling effect between the vibrator plate and the earth is effectively enhanced.It is found that the coupling effect is enhanced through increasing the number of reac-tion teeth of the vibration plate by increasing the coupling area between the vibration plate and the earth.

生物活性陶瓷iRoot BP Plus^(■)在儿童年轻恒前牙复杂冠折牙髓切断术中的应用

目的:观察生物活性陶瓷材料iRoot BP Plus^(■)(Innovative BioCeramix Inc,Vancouver,BC,Canada)在儿童年轻恒前牙复杂冠折牙髓切断术中的应用,并对其预后进行分析,为该术式的更广泛应用提供临床参考。方法:收集2017年3月至2022年9月因恒前牙复杂冠折就诊于北京大学口腔医院急诊科,行以生物活性陶瓷iRoot BP Plus^(■)为盖髓剂的牙髓切断术患者。根据患者术前根尖片和初诊病历显示为年轻恒牙者,纳入97颗年轻恒牙进行研究。收集患者初诊及复查时的临床及影像学检查资料,临床检查包括根尖孔形成情况、松动度、牙冠颜色、牙髓活力测试(冷测)、有无脓肿和瘘管,影像学检查包括根周膜连续性、根尖周低密度影像、复诊时盖髓剂下方牙本质桥形成情况、髓腔及根管钙化情况,并对上述结果进行分析。结果:最终纳入有复诊记录的64例患者共75颗患牙,其中男性37例(57.8%),女性27例(42.2%),就诊时平均年龄为9.1岁,平均随访时长19.3个月。采用iRoot BP Plus^(■)盖髓的牙髓切断术后6个月成功率为96.0%,术后1年成功率为94.7%。术后复查2年以上者共23例,累计失败6例。成功率在患牙就诊时距外伤的时间是否超过24 h组中(P=0.61)以及是否松动组中(P=0.28)的差异无统计学意义。结论:对无移位性损伤的年轻恒牙复杂冠折患牙,采用iRoot BP Plus^(■)盖髓的牙髓切断术1年成功率很高,该术式具备广泛推广价值。

异位牙及多生牙并发上颌骨囊肿的临床分析

目的 探讨异位牙及多生牙并发上颌骨囊肿的病因、症状、诊断及治疗。方法 回顾近5年天门市第一人民医院收治的6例异位牙及多生牙合并上颌骨囊肿的临床质料,并总结其诊治特点。结果 6例患者共有7颗异位牙和多生牙,均并发上颌骨囊肿,1颗左上尖牙异位至左鼻腔,1颗左上前磨牙异位至左眶底,1颗左上尖牙异位至左上颌窦泪前隐窝区域,1颗为左侧上颌窦底异位多生牙,3颗为右上颌骨前部多生牙。5例患者1次手术成功,1例患者初次手术仅处理囊肿,未处理异位牙,2个月后出现口腔瘘,8个月后再次手术去除异位牙。3例患者鼻内镜下经鼻入路手术,2例患者采取Caldwell-Luc入路手术,1例鼻内镜结合Caldwell-Luc入路手术;2例患者Caldwell-Luc入路术后出现面部麻木感3个月后缓解。6例患者均无复发及其他并发症。结论 异位牙及多生牙并发上颌骨囊肿常表现为面部隆起,可首诊于耳鼻咽喉科,耳鼻咽喉科医生需重视,避免漏诊。术者需结合手术经验,根据牙齿的位置及囊肿累及范围,选择合理的手术入路;鼻内镜下经鼻入路较Caldwell-Luc入路损伤小,并发症发生率较低。

交错凸齿式宽苗带小麦精量排种器设计与试验

针对外槽轮式小麦宽苗带排种器排量不稳定和苗带内种子分布均匀性较差的问题,该研究设计了一种交错凸齿式宽苗带小麦精量排种器。通过连续充种分析和排量计算,确定凸齿高度和凸齿角度是影响排量一致性和排种均匀性的关键参数。应用离散元法对上述关键参数进行中心旋转组合仿真试验,结果表明,对排量一致性、排种均匀性影响显著性程度由大到小的因素分别依次为凸齿角、凸齿高、作业速度,且均具有交互影响。借助响应面分析,得出凸齿高5 mm、凸齿角75°时的排量一致性和排种均匀性较优,平均变异系数分别为2.27%和7.61%。对该参数组合排种器进行样机试制,并进行台架试验,台架试验结果表明,排种一致性和均匀性变异系数与仿真值误差均低于5%,说明仿真优化结果可靠、准确。田间对比试验结果表明,播量120、150和180 kg/hm~2时,交错凸齿式宽苗带小麦精量排种器的播量一致性、纵向播种均匀性和横向播种均匀性变异系数分别较外槽轮式排种器降低0.99、3.01和9.38个百分点,满足小麦宽苗带播种农艺要求。研究结果可为提高排种均匀性的小麦排种装置设计提供参考。

成熟恒牙牙髓切断术的疗效及影像学评价

目的:观察不同年龄患者牙髓切断术的临床疗效,探讨牙髓钙化发生的情况和特点。方法:选择2019年10月到2022年8月就诊于北京大学口腔医院综合科龋源性露髓的成年恒前磨牙、恒磨牙行牙髓切断术的患者共77例,使用iRoot BP Plus生物陶瓷类材料作为盖髓剂,一次法完成牙髓切断术。将患者按年龄分为3组,青少年组(11~20岁)25例,平均年龄(15.88±2.19)岁;中年组(21~50岁)27例,平均年龄(34.59±8.67)岁;老年组(51~83岁)25例,平均年龄(63.84±7.40)岁。术后1年复查,评价临床疗效,记录钙化桥形成、钙化桥厚度,以及牙髓钙化指数(pulp calcification index,PCI)。结果:3组患者在性别、牙列及牙位分布上差异均无统计学意义(P>0.05)。术后1年随访率为85.71%(66/77),其中青少年组随访率为88.00%(22/25),中年组随访率为85.19%(23/27),老年组随访率为84.00%(21/25)。3组病例1年复查临床成功率分别为95.45%(21/22)、91.30%(21/23)、95.24%(20/21),差异无统计学意义(P>0.05)。临床成功病例中,钙化桥出现率青少年组12例(57.14%,12/21),中年组8例(38.10%,8/21),老年组3例(15.00%,3/20),差异有统计学意义(χ^(2)=7.810,P=0.020<0.05)。3组间钙化桥厚度比较差异有统计学意义(F=4.434,P=0.020<0.05)。钙化桥厚度与年龄呈负相关(r=-0.516,P<0.05)。3组间PCI变化(ΔPCI)分别为0.67±0.58、0.43±0.51、0.25±0.52,差异有统计学意义(F=3.404,P=0.040<0.05)。结论:老年患者龋源性露髓牙髓切断术同样能够获得较高的成功率;牙髓切断术后钙化桥的发生率以及牙髓钙化的加速程度与年龄相关;青少年组更易形成钙化桥,同时也出现更明显的根管钙化加速现象。

意向性牙再植术保留重度牙周炎患牙的临床应用策略

随着牙周组织再生技术的发展与进步,越来越多的学者报道可通过意向性牙再植术治疗重度牙周炎患牙。对于已经具备拔牙指征的重度牙周炎患牙,意向性牙再植术已经成为保存天然牙最后的可能手段。然而意向性牙再植术的适应证要求严格,手术能否成功与病例的选择和医生的操作技能密不可分。本文探讨意向性牙再植术治疗重度牙周炎患牙的适应证和操作步骤,并结合文献和病例分析影响重度牙周炎患牙意向性牙再植术预后的相关因素,为临床医生了解和掌握该项手术技术提供参考。

观察距离与上前牙宽度比例的相关性

目的:研究平视时不同观察距离与上前牙宽度比例关系的变化规律,为研究及临床确定上前牙宽度提供参考。方法:以牙体形态正常、牙列整齐、微笑美观的男生及女生的天然牙列作为研究对象,制取上、下颌牙石膏模型,分别在20、40、80、60、110、140 cm的距离拍摄上颌牙模正面照片,在AutoCAD 2015中进行测量,以P=0.05为检验水准,各组均数经检验符合正态分布后,左、右侧均数比较采用配对设计均数比较的t检验,不同距离拍摄的上前牙视觉宽度比值均数的比较采用随机区组设计资料的方差分析。结果:20 cm距离拍摄组上前牙宽度比例与其他距离拍摄的上前牙宽度比例间差异有统计学意义,40 cm及以上距离拍摄组上前牙宽度比例间差异无统计学意义。临床常用观察距离(60 cm),上颌侧切牙与中切牙比值为0.75±0.05,上颌尖牙与侧切牙比值为0.81±0.07;上颌前牙宽度百分比为:右尖牙(12.28±0.56)%,右侧切牙(15.61±0.71)%,右中切牙(21.42±0.78)%,左中切牙(21.57±0.67)%,左侧切牙(16.12±0.83)%,左尖牙(12.99±0.87)%。结论:平视时40 cm及以上的观察距离对上前牙宽度比例无影响,研究或临床上观察上前牙宽度时,应在研究对象的正前方,观察距离以大于40 cm为宜。

明清家具一腿三牙结构部件类型与匠意研究

通过书籍、博物馆、拍卖会等渠道收集统计了52例具有一腿三牙结构部件的明清家具,根据一腿三牙结构部件中角牙的造型,将一腿三牙结构部件分为A类型、B类型和C类型。分类的目的是为了更好地探讨构件与构件之间的关系,分析出不同类型构造规律、构造原理以及蕴含的匠意。经探究得出,一腿三牙部件在家具中的构造原理为受力解力、加固稳定以及家具顺纹而做遵循木材的物理力学性能。此外,总结了一腿三牙结构部件所蕴含的美学内涵、线脚艺术以及其中的榫卯结构。研究结果有助于深化对一腿三牙部件的认识,同时为研究明清家具中的结构部件提供新思路。

激光辅助冲洗在年轻恒牙牙髓血运重建中的临床效果分析

评估激光辅助消毒方法在年轻恒牙牙髓血运重建中的临床应用效果。选取2021年8月至2022年10月南京大学医学院附属口腔医院收治的45例儿童牙髓疾病患者作为研究对象,随机分为对照组与观察组,其中,对照组20例,采用5.0%次氯酸钠消毒液冲洗消毒;实验组25例,在根管冲洗后采用Er:YAG激光照射辅助消毒。基于细菌活性实验比较对照组和实验组在牙髓血运重建术中的灭菌效果差异,采用VAS量表和满意度调查问卷评估两组患者的术后疼痛反应和满意度。与常规次氯酸钠消毒液冲洗消毒相比,激光辅助照射消毒可以有效杀灭和清除细菌,其杀菌率为89.06%±0.10%(P<0.0001);实验组严重疼痛反应患者占比为8%,低于对照组的35%,差异有统计学意义(P<0.05);实验组患者的满意度为100%,高于对照组的85%,差异有统计学意义(P<0.05)。结果证明激光辅助根管消毒可以提高年轻恒牙牙髓血运重建术中的杀菌效果,其术后疼痛反应较轻,患者满意度较高,具有良好的临床应用前景。

48例Locator种植覆盖全口义齿5年临床修复效果评价

目的:观察Locator按扣式种植覆盖全口义齿的长期临床修复效果。方法:选择2016—2017年北京大学口腔医院门诊部采用Locator按扣式种植覆盖全口义齿修复的无牙颌患者48例,其中双颌全口义齿修复21例,单颌27例,共植入种植体230颗。观察种植体的留存率、种植体周黏膜探诊出血(BOP)、种植体周牙槽骨垂直吸收高度变化、义齿基托折裂和人工牙脱落折断等并发症,以及义齿固位力变化等。采用SPSS 13.0软件包对数据进行统计学分析。结果:在5年观察期间,5颗种植体脱落,1颗前牙区窄颈种植体颈部折断,12颗失访,种植体存留率为97.25%。种植修复后1年,48颗种植体周黏膜探诊出血(BOP+)(21.4%),平均出血指数(BI)为0.21±0.42,前牙区高于后牙区。种植体周牙槽骨垂直吸收高度为(0.21±0.35) mm,义齿基托折断2例。修复后5年,163颗种植体周黏膜探诊出血(BOP+)(76.89%),BI为1.00±0.70,种植体周牙槽骨垂直吸收高度为(0.58±0.85) mm;种植体周黏膜探诊出血指数与牙槽骨垂直吸收高度在男女之间、前牙区与后牙区之间均无统计学差异(P>0.05)。1年观察期和5年观察期间,种植体周黏膜平均出血指数、种植体周牙槽骨垂直吸收高度前后比较有显著差异(P<0.01)。义齿折裂17例,折裂率为26.15%,人工牙脱落折断率为16.92%,多发于前牙中线区及Locator基台附着体安放位置,因固位力下降首次更换Locator基台固位垫圈平均(34.2±10.3)个月。结论:Locator按扣式种植覆盖全口义齿有良好的临床修复效果。并发症多见于种植体周黏膜探诊出血和垂直向骨吸收,随着戴用时间延长有逐渐加重的趋势。其次是义齿基托折裂及人工牙脱落与折断,种植体脱落及折断。提示义齿制作时应加强金属支架在Locator基台位置和前牙中线区的强度,前牙区尽量避免使用窄径种植体。

种植体支抗联合闭合式牵引在颌骨内埋伏牙、阻生牙患者中的应用效果及对治疗后康复、口腔健康的影响

目的探讨种植体支抗联合闭合式牵引在颌骨内埋伏牙、阻生牙患者中的应用效果及对治疗后康复、口腔健康的影响。方法选取2019年1月—2022年5月收治的颌骨内埋伏牙、阻生牙90例,根据治疗方法不同将其分为观察组和对照组2组各45例。观察组采取种植体支抗联合闭合式牵引治疗,对照组采取闭合式开窗术加传统固定治疗。比较2组治疗后临床效果、康复情况,治疗前和治疗后4个月龈沟液细胞因子、口腔健康微生态环境、咀嚼功能,以及治疗后4个月内不良反应发生情况。结果治疗后,观察组总有效率95.56%(43/45)高于对照组80.00%(36/45),疼痛程度低于对照组(P<0.05)。治疗后4个月,2组龈沟液丝氨酸蛋白酶抑制剂、基质金属蛋白酶-3、白细胞介素-1β和牙周袋探诊深度、牙龈指数、龈沟出血指数、菌斑指数、牙齿松动度均较治疗前升高,且观察组低于对照组(P<0.01)。治疗后4个月,2组咀嚼效率、咬合力均高于治疗前,咀嚼疼痛评分低于治疗前,且观察组咀嚼效率、咬合力高于对照组,咀嚼疼痛评分低于对照组(P<0.01)。治疗后4个月内,2组不良反应发生率比较差异无统计学意义(P>0.05)。结论种植体支抗联合闭合式牵引应用于颌骨内埋伏牙、阻生牙效果显著,可促进牙齿萌出、恢复咀嚼功能,改善治疗后口腔健康微生态环境及炎症状态,具有较好安全性。

二氧化锆全瓷冠修复前牙的效果及对局部炎症状态的影响

目的:探究及观察二氧化锆全瓷冠修复前牙的效果及对局部炎症状态的影响。方法:选取2019年1月—2021年1月深圳市龙岗区妇幼保健院口腔科的100例需进行前牙冠修复的患者为研究对象,根据随机数字表法分为对照组(镍铬合金烤瓷冠组)和观察组(二氧化锆全瓷冠组),每组50例。比较两组的修复效果(颜色匹配度、完整度及边缘密合度)、不良情况发生率、局部炎症状态指标[龈沟液炎症因子白介素-1β(IL-1β)及白介素-6(IL-6)、炎症介质前列腺素E2(PGE2)]、炎症趋化因子[调节活化正常T细胞表达和分泌因子(RANTES)]、患者满意度。结果:观察组的颜色匹配度、完整度及边缘密合度均显著优于对照组,不良情况发生率显著低于对照组,差异均有统计学意义(P<0.05)。治疗前,两组的局部炎症状态指标比较,差异均无统计学意义(P>0.05);治疗后3、6个月,观察组的局部炎症状态指标均显著优于对照组,患者满意度显著高于对照组,差异均有统计学意义(P<0.05)。结论:二氧化锆全瓷冠修复前牙的效果较好,且可有效控制患者的局部炎症状态,更受患者认可。

叩齿治疗睑板腺功能障碍相关性干眼疗效观察

目的评估叩齿治疗睑板腺功能障碍(MGD)相关性干眼的安全性和有效性。方法纳入2023年8月—2024年3月于北京中医药大学东方医院眼科门诊就诊的MGD相关性干眼患者51例,根据随机数字表分为2组,最终叩齿组20例(36眼)、对照组16例(28眼)完成研究。对照组给予干眼健康宣传教育、睑板腺按摩、玻璃酸钠滴眼液和双氯芬酸钠滴眼液点眼治疗,叩齿组在对照组治疗基础上给予叩齿锻炼,2组疗程均为4周。观察2组患者治疗前后的泪河高度、首次非接触式泪膜破裂时间(fNIBUT)、平均非接触式泪膜破裂时间(aNIBUT)、眼表疾病指数(OSDI)量表评分,评估治疗安全性。结果治疗后2组患者泪河高度均较治疗前明显增加(P均<0.05),且叩齿组明显高于对照组(P<0.05);叩齿组患者的fNIBUT、aNIBUT和对照组患者的aNIBUT均较治疗前明显延长(P均<0.05),且叩齿组患者的fNIBUT明显长于对照组(P<0.05);2组患者的OSDI量表评分均较治疗前明显降低(P均<0.05),但2组间比较差异无统计学意义(P>0.05)。研究过程中,2组患者均未报道不适症状。结论叩齿可以改善MGD相关性干眼患者的泪液分泌量和泪膜稳定性。

基质细胞衍生因子1α联合自体贫血小板血浆在 恒牙撕脱伤中的应用评价

目的:探讨基质细胞衍生因子1α(SDF-1α)联合自体贫血小板血浆(PPP)在恒牙撕脱伤中的治疗效果。方法:选择2020年3月—2022年3月衡水市人民医院收治的恒牙撕脱伤患者144例(患牙152颗),随机分为试验组72例(患牙76颗)和对照组72例(患牙76颗)。对照组行常规再植术,术前使用PPP生物液浸泡、冲洗根尖。试验组在对照组基础上,于离体牙再植前在牙槽窝内植入SDF-1α。术后随访12个月,比较2组植入成功率、术后咬合疼痛程度、龈沟液中炎症因子表达、血清生长因子表达及术后并发症发生率。采用SPSS 19.0软件包对数据进行统计学分析。结果:对照组患牙再植成功率为90.79%(69/76),试验组为98.68%(75/76),试验组显著高于对照组(P<0.05)。术后2天、3个月和12个月,2组患者疼痛程度评分逐渐降低(P<0.05);各时间点疼痛程度评分组间比较,差异无统计学意义(P>0.05)。术后1个月,2组患者C反应蛋白(CRP)、白介素6(IL-6)显著降低(P<0.05),试验组显著低于对照组(P<0.05);2组患者可溶性细胞间黏附因子(sICAM-1)升高,试验组显著高于对照组(P<0.05)。术后1个月,2组患者血管内皮生长因子(VEGF)、成纤维细胞生长因子(FGF)、转化生长因子β(TGF-β)和血小板衍生生长因子(PDGF)升高,试验组显著高于对照组(P<0.05)。试验组术后并发症发生率显著低于对照组(P<0.05)。结论:PPP联合SDF-1α用于恒牙撕脱伤治疗,延迟再植成功率高,且术后不良反应发生率低。