Clinical performance of removable partial dentures: A retrospective clinical study

Removable partial dentures (RPDs) (conventional and implant-supported) treatment is considered a viable option to replace missing teeth as inexpensively as possible, but it has limitations. Objectives: This study reports the effect of gender and location (maxilla vs. mandible) on the clinical performance of removable partial dentures (RPDs). Materials and Methods: A total of 100 Patients who had RPDs delivered between 1990-1995 were evaluated. A 4-point scoring system was used to assess seventeen criteria. These criteria include acceptance, stability, support, retention, adaptation, occlusion, integrity, and design of the pros-theses, rest and rest seat preparation, occlusal wear, esthetics, phonetics, tissue condition, mobility of abutments, gingival and plaque indices. The data were analyzed using Kruskal-Wallis and Mann-Whitney U non-parametric statistical tests. Results: The results showed that acceptance of RPDs was rated the lowest. Other reasons for failure were poor retention, lack of integrity of the prostheses and inadequate adaptation. Retention and design of major connectors attributed to Mandibular RPD failure. Success rate of 75% was observed in male compared with 67.2% for female. Maxillary RPDs showed a higher success rate (78%) compared with the mandibular (70.1%). No significant statistical difference in Alpha scores between female and male patients and between maxillary and mandibular RPDs (p < 0.05). Conclusions: The clinical performance of RPDs showed a higher success rate in male patients compared to female patients and the maxillary RPDs showed a higher success rate compared to mandibular.

The Effect of Partial Removable Denture Use on Oral Health Related Quality of Life and Masticatory Function, after 5 Years Use

The aim of this study was to evaluate whether partial removable denture use indeed leads to improved oral health related quality of life and masticatory function. Materials and Methods: Partially edentulous patients presenting for removable denture treatment at the Prosthodontics Service in the Hospital Affiliated to Kinshasa University (Democratic Republic of Congo) were assessed for enrolment in this study. After applying exclusion criteria, 378 patients were included in the study, and randomly assigned into 2 groups. Oral health related quality of life (OHIP-23) and mastication time (MaT), number of chewing cycles (MaC), mastication frequency (MaF), and the sizes of the peanut fragments (FraS) were compared in both groups. Statistical significance was set at p < 0.05. Results: The average MaC, MaT, MaF, and FraS were 119 (± SD 53.70), 86.75 (±SD 35.35), 1.38 (±SD 0.25), and 3.3 (±SD 3.25) for the denture group and 77.9 (±SD 23.9), 60.2 (±SD 17.91), 1.29 (±SD 0.15), and 1.5 (±SD 0.7) for the non-denture group, respectively. Conclusion: The overall oral health related quality of life was best in the non-denture than denture.

Risks Factors of Caries and Periodontal Diseases in the Patients, after 5 Years Use a Partial Removable Denture

Objective: The goal of the removable partial denture is to restore impaired esthetics and masticatory function by replacing missing teeth. The aim of this study was to establish a possible correla-tion between removable partial denture in acrylic resin use after 5 years and dental diseases. Materials and Methods: Partially edentulous patients presenting for removable denture treatment at the Prosthodontics service of the Affiliated Hospital of Kinshasa University, Democratic Republic of Congo were assessed in this study. Patients were randomly assigned into 2 groups: Denture and non-denture group. Caries and periodontal diseases were compared between both groups. Statistical significance was set at p < 0.05. Results: The average age in the denture and non-denture-group was 53.15 (±SD 22.05) and 31.59 (±SD 11.98) years. Out of 160 teeth were decayed, both 110 teeth (68.75%) in the denture-group and 50 teeth (31.25%) in the non-denture group. The DMFT index calculated at start time of the study was 0.2 for both groups, after five years was 7.1 for the denture-group and 2.6 for the non-denture-group. The plaque index in the denture-group had an index of 1 and that of non-denture-group was 0.5. Conclusion: The relationship has been found between patients’ wearers a RPD and dental diseases.

The Effect of Non-Contact Conditions in a Splinted Fixed Partial Denture on the Load Sharing Mechanism： A Finite Element Study

A computer-aided design model for a fixed partial denture was constructed and used in a finite element analysis to study the overall load sharing mechanism between the fixed partial denture and oral structures while the denture base rested on the al- veolar ridge. To investigate the consequences of non-contact conditions, three additional models were generated incorporating a uniform clearance of 0.125 mm, 0.25 mm, and 0.5 mm, respectively. A 100 N static load located at the free end of the prosthesis was applied while the distal portion of the jaw was set fixed. The results show that whilst releasing the ridge almost entirely, the presence of the clearance drastically increased the load on the splinting teeth. A pull-out force on the canine tooth of about 44 N was computed, accompanied by a mesio-distal moment of about 500 N.cm. The combination of which was similar to the tooth extraction maneuver performed by the dentist. In contrast, the second premolar was found to bear a push-in force of almost 115 N. The first molar, though barely solicited in the contact condition, became substantially loaded in non-contact conditions, which validates the choice of sacrificing three teeth to support the denture.

Effect of Accessory Retention Forms on the Bond Strength of Resin-bonded Fixed Partial Dentures:a 3D Finite Element Study

Interface debonding between prostheses and abutments was the most frequent failure mode of resin-bonded fixed partials dentures(RBFPDs) in clinic. The purpose of this study was to investigate the effect of accessory retention forms on the bond strength of RBFPDs. Three types of 3D finite element models were constructed.The model of posterior metal plate RBFPD with spoon-shaped occlusal rest seats served as the control. The remaining two types of models based on the control added the retention form design of the pin hole and axial groove respectively. The axial or buccolingual load of 150 N was applied on the prosthesis, first premolar and first molar respectively. The maximum principal stresses of the adhesive layer in different models were calculated. Under the load of the same magnitude, the stress due to the buccolingual load was significantly higher than that due to the axial load in the adhesive layer. The proximal shoulder, occlusal rest seats wall and the proximal margin adjacent to the shoulder were the high risk region where the adhesive layer damaged easily. Compared with the control model, the pin and groove models could slightly decrease the stress in the adhesive layer after the axial loading, while the stress in the adhesive layer drastically decreased after horizontal loading and reduced by 22% and 31% respectively. These results indicate that the horizontal occlusal force has a more serious harm to the debonding of RBFPDs. In addition, the accessory retention forms(e.g. pin and axial groove retention forms) can decrease the stress level in the adhesive layer, which are conducive to increase the load-bearing capacity of RBFPDs.

The extraction of survey lines on partial edentulous models

Survey lines are important features on the dental meshes for removable partial denture frameworks design, but few researche has been done by surveying digital models. This article describes a method for identifying survey line on dental meshes and displays survey line in real time. At the beginning, we segment tooth based on morphologic operators to get the tooth parts. The second step is to calculate the viewing direction perpendicular to the occlusal plane. Finally, we extract boundary points on 2D plane, thereby obtaining a survey line in the surveying direction. We have developed a module to demonstrate survey line in real time.

Effect of proximal contact strength on the three-dimensional displacements of implant-supported cantilever fixed partial dentures under axial loading

Objective:This study investigated the effect of proximal contact strength on the three-dimensional displacements of cantilever fixed partial denture(CFPD) under vertically concentrated loading with digital laser speckle(DLS) technique.Methods:Fresh mandible of beagle dog was used to establish the implant-supported CFPD for specimen.DLS technique was employed for measuring the three-dimensional displacement of the prosthesis under vertically concentrated loading ranging from 200 to 3 000 g.The effect of the contact tightness on the displacement of CFPD was investigated by means of changing the contact tightness.Results:When an axial concentrated loading was exerted on the pontic of the implant-supported CFPD,the displacement of the CFPD was the greatest.The displacement of the prosthesis decreased with the increase of contact strength.When the contact strength was 0,0.95,and 3.25 N,the displacement of the buccolingual direction was smaller than that of the mesiodistal direction but greater than that of the occlusogingival direction.When the force on the contact area was 6.50 N,the mesiodistal displacement of the prosthesis was the biggest while the buccolingual displacement was the smallest.Conclusions:The implant supported CFPD is an effective therapy for fully or partially edentulous patients.The restoration of the contact area and the selection of the appropriate contact strength can reduce the displacement of the CFPD,and get a better stress distribution.The most appropriate force value is 3.25 N in this study.

数字化印模技术在可摘局部义齿中的应用现状

可摘局部义齿具有强度高、价格低、适应证广、创伤小及可修理等特点,是治疗牙列缺损的重要手段之一。随着人口老龄化日趋凸显,可摘局部义齿在未来仍将是一种常用的修复方式。可摘局部义齿的制作离不开精确的印模技术,传统可摘局部义齿印模制取过程中存在诸多不足,如就诊次数多、耗时长、制作过程复杂、污染高、浪费多、效率低、质量不易控制等。然而,数字化印模的出现为可摘局部义齿印模的制取提供了新的技术支持,数字化印模技术具有高精度、舒适性、高效、缩短治疗时间以及个性化设计等优势,有助于提高可摘局部义齿修复的效果和患者的满意度。数字化印模技术作为全程数字化可摘局部义齿修复诊疗的前提和基础,其对口腔模型重建的精度直接影响最终义齿修复效果。目前,数字化印模技术已广泛运用于口腔修复领域,本文将对数字化印模技术在可摘局部义齿中的应用现状进行综述,以期进一步指导临床应用。

不同金刚砂车针对两种氧化锆切削行为的研究

目的研究临床常见两种不同类型氧化锆材料的耐磨性和被切削表现以及不同金刚砂车针对两种氧化锆的切削效率。方法使用Mani和RAICH金刚砂车针在匀速恒力状态下切削多色多层氧化锆(MY锆)与超透氧化锆(ST锆),并且用Micro-CT系统对体积损失部分进行扫描重建,计算两种氧化锆的体积损失,评价其耐磨性。用两种氧化锆材料的体积损失与车针质量损失之比来评价两种车针的切削效率。使用SEM观察切削前后的两种氧化锆材料和两种金刚砂车针的表面微观形貌。结果多色多层氧化锆体积损失较超透氧化锆大,且随切削深度增加而减少。多色多层锆体积损失为MY 1st=20.07 mm^(3),MY 2nd=16.73 mm^(3),MY 3rd=13.5 mm^(3)。超透氧化锆体积损失为ST=12.64 mm^(3)。耐磨性排序:ST>MY 3rd>MY 2nd>MY1st。RAICH车针平均切削效率为109.21;Mani车针的平均切削效率为110.59,经t检验,差异无统计学意义(P>0.05)。结论多层多色氧化锆越靠近浅层越容易切削,比超透氧化锆更容易切削;两种车针的切削效率基本相等。

热处理技术对3D打印钛合金试件机械性能的影响

背景:近年来,增材制造(又称3D打印)逐渐成为制作可摘局部义齿钛合金支架的主流方式。热处理作为改善3D打印钛合金支架机械性能的重要方法而成为目前的关注热点。目的:总结目前应用于3D打印钛合金试件的主要热处理技术(包括退火处理、固溶时效处理、热等静压处理及其他热处理)以及这些热处理技术对3D打印钛合金试件机械性能、微观结构的影响,为改进可摘局部义齿钛合金支架的热处理技术提供理论依据。方法:采用计算机检索中国知网、PubMed和ScienceDirect数据库中有关3D打印钛合金热处理试件的文献资料,检索时限为2012-2023年,根据纳入和排除标准,最终选取61篇文献进行综述分析。结果与结论:①使用常规退火技术处理3D打印钛合金试件,使其在500-900℃下保持2-4 h,能有效增加3D打印钛合金试件的延伸率。②固溶时效处理相较于常规退火技术更复杂,固溶时效处理后的钛合金试件在屈服强度方面表现突出,并且有更好的耐腐蚀性;但固溶时效处理后的3D打印钛合金试件在延伸性方面没有优势。③热等静压处理可以减少3D打印钛合金试件的内部缺陷,可明显增加3D打印钛合金试件延伸率,并增加其疲劳寿命。④快速热处理可以明显提高3D打印钛合金试件的延伸率,并且速度更快,在延伸率提升和热处理效率方面,比以往常规的退火更具优势。⑤循环热处理对3D打印钛合金试件延伸率的提升超过了常规退火,循环热处理可明显改善3D打印钛合金试件的晶粒结构,但热处理时间过长,效率较低。

张口受限患者的数字化修复1例及文献回顾

目的探讨因系统性硬皮病导致的特殊张口受限(小口畸形)患者取模困难时准确得到其口内模型的方法。方法本研究遵循医学伦理,并获得患者知情同意。对1例肯氏Ⅰ类下颌牙列缺损的硬皮病张口受限患者应用以数字化技术为主导,结合传统印模方式的分段印模方案。根据其本身的左、右下颌牙列制作个别托盘后进行分段式取模,同时口内扫描取得上、下颌软硬组织形态数据。在获得各部分模型后,对下颌模型进行扫描和数字对齐,形成最终的牙列模型,并借助CAD/CAM技术设计制作最终的可摘局部义齿,同时结合文献对张口受限患者可摘局部义齿修复诊疗进行回顾分析。结果义齿固位良好,获得了良好的修复效果,患者对该义齿的咀嚼效率等功能行使均满意。文献复习结果表明,数字化技术结合传统印模方法,利用计算机进行拟合可以准确地得到患者口内模型,为后续修复做好基础工作。然而患者下颌牙列前段无牙时该流程误差可能较大,仍需要进一步完善。结论以数字化技术为主导,结合传统印模方式的分段印模方案用于修复张口受限患者的牙列缺损效果良好,患者就医体验、满意度高,值得临床推广。

二硅酸锂基玻璃陶瓷单端树脂粘接桥修复个别前牙缺失的临床应用

目的探讨二硅酸锂基玻璃陶瓷单端树脂粘接桥修复个别前牙缺失的临床效果,为个别前牙缺失修复方式的选择提供参考。方法本研究已通过单位伦理委员会审查批准,并获得患者知情同意。选取42例单颌前牙缺失数量在两颗内的患者,采用二硅酸锂基玻璃陶瓷单端树脂粘接桥修复,修复后6个月、1年、2年、3年进行随访,评价美学、功能修复效果及牙周健康状况,并采用视觉模拟评分量表(VAS)调查患者的满意度。结果观察期间,42例二硅酸锂基玻璃陶瓷单端树脂粘接桥修复的患者中有1例3个月内连接体发生断裂,1例2年内发生脱粘;美学修复效果的等级均评定为A级;修复后牙周健康状况良好,基牙及桥体下的软硬组织无临床吸收现象,评价指标均为A级;患者总满意率为100%。结论对于个别前牙缺失,二硅酸锂基玻璃陶瓷单端树脂粘接桥可达到微创、固位牢靠、美观舒适和生物相容性好的修复效果,患者满意度高,在临床中可以考虑作为一种理想的修复方式。

新构型可摘局部义齿设计制作及精度与适合性研究

目的:对可摘局部义齿进行新构型设计与制作,评估其精度及适合性。方法:在支架网状结构部分设计带基牙预备体的结构,通过分层方法,设计树脂基板颊侧与组织面,分别使用选择性激光熔融技术制作(SLM)、数字光处理技术(DLP)及数控切削技术(CNC)制作钛合金新构型可摘局部义齿支架、基托树脂部分及牙冠,拼接组装完成实验组新构型可摘局部义齿;对照组为SLM技术制作的传统设计可摘局部义齿支架,常规排牙充胶完成最终义齿。每组10个样本。采用Geomagic Warp软件的3D比较功能对两组可摘局部义齿的精度及适合性进行检测,并对结果统计分析。结果:实验组与对照组义齿支架精度3D偏差(mm)分别为0.153±0.019和0.153±0.011(P=0.978),义齿整体适合性3D偏差(mm)分别为0.191±0.006和0.187±0.007(P=0.218)。结论:新构型可摘局部义齿设计与制作过程简便,易于个性化修整,精度与适合性符合临床需求。

外胚层发育不全患者牙列缺损修复1例及文献回顾

目的 探讨外胚层发育不全患者先天缺牙的治疗方案,为临床提供参考。方法 报道1例面中份凹陷,颏部前突,面下1/3发育不足的外胚层发育不全患者,患者上颌多颗牙先天缺失,余留牙为畸形牙,下颌牙列先天缺失,牙弓较小,上下牙槽骨发育不良。通过上颌可摘局部义齿、下颌在数字化导板辅助下进行前牙区种植,杆卡式种植覆盖义齿对其进行治疗,并对其治疗方案进行文献回顾。结果 患者佩戴义齿后固位及稳定佳,咬合关系良好,患者面部外形恢复较好,上下唇饱满,面下1/3与面中1/3基本相等,恢复了咀嚼功能。文献回顾结果表明,先天缺牙的外胚层发育不全患者的口内情况通常比较复杂,修复困难,对此类患者常见的修复方式包括固定桥、可摘局部义齿、全口义齿、覆盖义齿和种植义齿,需要根据患者口内实际情况选择不同的治疗方案。目前,对于外胚层发育不全患者先天缺牙的治疗尚未达成共识,有学者建议缺牙少的患者优先选择固定修复,缺牙多的患者选择可摘义齿或种植覆盖义齿修复,未成年患者优先选择活动修复,待颌骨发育完成后视情况更换永久固定修复。结论 对于外胚层发育不全先天缺牙的患者,应该充分考虑各方面因素,以修复为导向个性化制定可行的修复方案。

生物导向型牙体预备技术对修复体边缘牙周菌斑定植水平和龈沟液炎症因子水平的影响

目的:探讨运用生物导向型预备技术制备的修复体边缘牙周菌斑定植和龈沟液(GCF)炎症因子水平及临床意义。方法:纳入102例慢性牙周炎患者,随机分为2组(n=51),对照组行传统牙体预备,观察组行生物导向性预备技术。比较两组患者术前和术后6月修复体边缘骨吸收量、探诊方面的具体深度、牙龈乳头以及改良菌斑方面的具体指数、改良龈沟出血指数,在修复体位置采集龈沟液,测定TNF-α、 IL-6和MMP8水平。结果:术后6月观察组和对照组患者近中、远中及平均骨吸收量差异无统计学意义(P>0.05)。两组患者修复体牙周指数明显降低(P<0.05),且观察组患者改良龈沟出血指数、探诊深度、牙龈乳头指数和改良菌斑指数明显低于对照组(P<0.05)。两组患者龈沟液炎性因子明显降低,且观察组患者TNF-α、MMP8和IL-6明显低于对照组(P<0.05)。观察组患者舒适度、固位功能、美观度和总分明显高于对照组(P<0.05),而在咀嚼功能、语言功能方面差异未见统计学意义(P>0.05)。结论:生物导向性预备技术应用于慢性牙周炎患者,可有效改善修复体定植水平,消除龈沟液炎症反应,提高患者满意度。

数字化印模与传统压力印模制取的上颌牙列缺损模型的精确度比较

目的比较数字化印模与传统压力印模制取的上颌牙列缺损模型的精确度,分析其影响因素。方法选取20例上颌牙列缺损患者(25个游离端,18个非游离端),使用数字化印模与传统压力印模制取上颌牙列缺损模型。数字化印模制取的牙列缺损模型通过口扫(TRIOS2,3Shape)获取;同一患者采用传统压力印模后灌注成石膏模型进行窗扫(先临三维),导出STL格式数字模型。两种数字模型在Geomagic Control X软件中分别进行以基牙作为标志点的转换拟合和最佳拟合,测量两种数字模型之间的总偏差(T),计算缺损区牙槽嵴顶近中(M)、中央(C)、远中(D)以及上腭部位点(P)位差,并比较游离端缺损区域与非游离端缺损区域的差异,结果采用独立样本t检验进行统计分析。结果以基牙作为标志点进行转换拟合时,两种数字模型之间的总偏差为0.03 mm,缺损区牙槽嵴顶M、C、D点以及上腭部位点(P)位差分别为0.47、0.65、1.48、0.07 mm。最佳拟合时,两种数字模型之间的总偏差为0.03 mm,缺损区牙槽嵴顶M、C、D、P点位差分别为0.50、0.66、1.43、0.08 mm。两种拟合方式之间没有显著性差异(P>0.05)。游离端缺损区与非游离端缺损区的比较结果显示,游离端缺损区的C、D位点偏差均值分别为1.07、2.38 mm,非游离端缺牙区为0.08、0.11 mm,游离端大于非游离端,差异有统计学意义(P<0.05)。结论数字化印模制取的上颌牙列缺损模型与传统压力印模制取的模型相比有较大偏差,特别是在游离端缺损区域中央及远中位点。

数字化印模技术在可摘局部义齿中的应用及其准确度的影响因素

数字化印模技术已经是临床较为常用的印模方式之一,并被广泛应用于牙列缺损的可摘局部义齿修复领域。该文介绍了可摘局部义齿修复中数字化印模技术的应用,并对数字化口内印模技术准确度的相关影响因素进行综述分析,以期为临床应用提供指导。

SLM3D打印技术与失蜡铸造技术在可摘局部义齿支架制作中的应用

目的分析选择性激光熔融(SLM)3D打印技术与失蜡铸造技术在可摘局部义齿支架制作中的应用效果。方法选取2021年5月至2023年5月汉中市口腔医院收治的86例KennedyⅠ类牙列缺损患者作为研究对象,根据随机数表法将患者分为A组和B组各43例。A组采用SLM3D打印技术行可摘局部义齿支架制作,B组采用失蜡铸造技术行可摘局部义齿支架制作。两组患者于义齿佩戴1周后复诊,比较两组患者口腔内黏膜压痛点数量、义齿支架佩戴效果以及咀嚼效率;两组患者于义齿佩戴1个月后再次复诊,比较两组患者的满意度评分、主观感受评分及并发症发生情况。结果义齿佩戴1周后,A组患者口腔内黏膜平均压痛点为(0.61±0.13)个,明显少于B组的(2.23±0.21)个,A组患者吸光度值为0.61±0.05,明显高于B组患者的0.43±0.03,差异均有统计学意义(P<0.05);义齿佩戴1周后,A组患者的固位性、适合性和稳定性分别为55.81%、53.49%、58.14%,明显高于B组的30.23%、27.91%、32.56%,差异均有统计学意义(P<0.05);义齿佩戴1个月后,A组患者的主观感受评分和满意度评分分别为(28.07±2.75)分、(14.66±3.21)分,明显高于B组患者的(16.55±0.44)分、(6.68±1.32)分,差异均有统计学意义(P<0.05);义齿佩戴1个月后,A组患者的并发症总发生率为6.98%,明显低于B组患者的23.26%,差异有统计学意义(P<0.05)。结论SLM3D打印技术在可摘局部义齿支架制作中的应用效果良好,制作义齿支架较传统失蜡铸造技术偏差更小,具有更高的精确度,同时患者使用舒适度和满意度也更高,值得临床推广应用。

916份可摘局部义齿加工设计单质量的调查评估

目的评估可摘局部义齿(RPD)加工设计单的填写质量,分析医技沟通及信息传递的现状。方法随机抽取某一全国性大型义齿加工厂在4周内的RPD加工设计单,按照委托方的等级将加工设计单分为3组。调查内容包括患者基本信息、医生基本信息、设计图信息、其他详细信息以及出件时间等信息。同时由2位质检员共同完成质量评估。结果共收集和评估了916份设计单的填写情况。患者及医生的姓名填写率最好,均为97.6%(n=894);出件时间填写情况最差,仅占6.4%(n=59)。58.7%(n=538)的设计单无医生联系电话,86.8%(n=795)设计单的设计图信息部分填写不全。质量评估结果为74.2%设计单未达到入检“合格”的标准。结论目前RPD加工设计单整体上看填写质量较差,RPD设计及制作中医技职责划分不明确,医技沟通情况不理想。

半导体激光联合树脂暂基托行唇、颊系带修整及前庭沟加深术在全口义齿修复中的应用

目的探讨半导体激光联合树脂暂基托(过渡性义齿)行唇、颊系带修整术在全口义齿修复中的应用效果。方法选取于2020年3月至2022年1月就诊于衡水市人民医院口腔正畸修复科的牙槽嵴条件差,伴唇、颊系带附着位置过高的无牙颌患者100例,将其分为两组:实验组(激光联合树脂暂基托治疗后,全口义齿修复组),对照组(术前全口义齿修复组),各50例。采用临床疗效、固位稳定效果、咀嚼效率、口腔健康影响程度-EDENT量表、不良反应发生情况等观察指标评价治疗效果。结果实验组患者的固位稳定效果、咀嚼效率、口腔健康影响程度、语言功能评分为(9.40±0.44)、(8.71±0.54)、(8.38±0.60)、(9.56±0.33)分,均明显高于对照组[(7.14±0.87)、(7.50±0.42)、(7.11±0.75)、(7.22±0.67)分],差异均有统计学意义(P<0.05)。实验组患者的总有效率为98.00%,明显高于对照组(78.00%),不良反应发生率为6.00%,明显低于对照组(26.00%),差异均有统计学意义(P<0.05)。结论对于牙槽嵴条件差,伴唇、颊系带附着位置过高的无牙颌,在全口义齿修复前,采用半导体激光联合树脂暂基托(过渡性义齿)行唇、颊系带修整术可提高临床疗效,相对增加口腔前庭沟的深度,改善神经-肌肉-颞下颌关节-咬合的动态平衡,为牙列缺失患者修复前提供良好的口腔环境,有利于患者口腔功能的恢复。