Crestal ridge width changes when placing implants at the time of tooth extraction with and without soft tissue augmentation after a healing period of 6 months: report of 24 consecutive cases

The esthetic outcome of an implant-supported restoration is first of all dependent on the soft tissue volume. Since the labial bone plate resorbs in every direction after tooth extraction, even when an implant is placed immediately, most patients end up with compromised esthetics. Twenty-four patients were treated consecutively with implants placed in the maxillary anterior area at the time of tooth extraction using two different treatment modalities. The first 12 patients were treated without raising a flap, whereas a subepithelial connective tissue graft was placed using the tunnel technique in the labial area of the subsequent 12 patients at the time of tooth extraction and implant placement. The dimension of the labial volume was measured before treatment and 6 months after implant placement. The results show an average loss of volume in the nongrafted group of 1.063 mm, whereas in the grafted group, there was a slight gain of 0.34 mm. These results demonstrate the effectiveness of placing a soft tissue graft at the time of immediate implant placement in the esthetic zone.     

Soft tissue profile changes after autogenous iliac crest onlay grafting for the extremely atrophic maxilla.

PURPOSE: The aim of this study was to evaluate profile changes in the hard and soft tissues after onlay grafting in the extremely atrophic maxilla. PATIENTS AND METHODS: Onlay grafting using autogenous iliac crest bone grafts was performed in 49 patients (42 females and 7 males) with extreme atrophy of the edentulous maxilla (vertical amount of bone: <6 mm, transverse amount of bone: <5 mm). For the assessment of the changes to the hard and soft tissues, the preoperative and postoperative cephalograms were traced and the cephalometric measuring points (44 skeletal and 25 soft tissue points) were digitalized with the aid of the Dentofacial Planner System. Evaluation of a relationship between soft tissue and hard tissue profile changes was performed by comparing the movement of the skeletal points Sub-ANS and A-point with the shift of the soft tissue point SLS. To determine significant hard tissue and soft tissue changes, the measured values were evaluated using the SPSS program system and examined for statistical significance by use of the Wilcoxon test. RESULTS: An advancement of the bony maxilla profile in the sagittal direction by an average of 2.4 mm (P < .01) was found. The soft tissue profile of the upper lip was moved forward on average by 2.3 mm (P = .0039) at the superior labial sulcus point and by 2.7 mm (P = .0018) at the labrale superius point. The ratio of the soft tissue change to hard tissue change was 0.7:1 (superior labial sulcus: skeletal point sub-ANS) or 0.9:1 (superior labial sulcus: A point). CONCLUSIONS: When planning onlay graft operations, consideration should be given to the functional and aesthetic effects of the profile changes on the upper lip.     

Evaluation of a resorbable collagen matrix infused with rhPDGF-BB in peri-implant soft tissue augmentation: a preliminary report with 3.5 years of observation

Soft tissue augmentation around dental implants in the esthetic region remains a challenging and unpredictable procedure. The ideal surgical technique would include of an off-the-shelf product to minimize morbidity after autogenous grafting procedures. The aim of this study was to use a resorbable collagen matrix (Mucograft) to serve as a scaffold to recombinant human platelet-derived growth factor BB (rhPDGF-BB) to increase peri-implant soft tissue volume in anterior maxillary sites. A total of six patients who had previously undergone a bone regeneration procedure were included in this study. The collagen matrix was applied during stage-two surgery (expanded polytetrafluoroethylene membrane removal and implant placement). Measurements were performed through customized stents by means of endodontic files, and at abutment connection, a soft tissue biopsy specimen was harvested for histologic examination. The healing period was uneventful in all six patients. Measurements were taken apically, centrally, and occlusally for each site. The mean gains in volume from baseline to the 4-month measurement at the apical, central, and occlusal aspects were 0.87 ± 2.13 mm, 2.14 ± 3.27 mm, and 0.35 ± 3.20 mm, respectively. The results showed a moderate increase in the soft tissue volume in esthetic peri-implant sites when applying a collagen matrix infused with rhPDGF-BB. However, the measuring techniques available need to be further improved to record exact changes in the soft tissue volume.     

Importance of soft tissue for skeletal stability in maxillary advancement in patients with cleft lip and palate.

OBJECTIVE: Assessment of stability of the advanced maxilla after two-jaw surgery and Le Fort I osteotomy in patients with cleft palate based on soft tissue planning. SUBJECTS: Between 1995 and 1998, 15 patients with cleft lip and palate deformities underwent advancement of a retruded maxilla, without insertion of additional bone grafts. Eleven patients had bimaxillary osteotomies and four patients only a Le Fort I osteotomy. Relapse of the maxilla in horizontal and vertical dimensions was evaluated by cephalometric analysis after a clinical follow-up of at least 2 years. RESULTS: In the bimaxillary osteotomies, horizontal advancement was an average 4 mm at point A. After 2 years, there was an additional advancement of point A of an average of 0.7 mm. In the mandible, a relapse of 0.8 mm was seen after an average setback of 3.9 mm. In the four patients with Le Fort I osteotomy, point A was advanced by 3.8 mm and the relapse after 2 years was 0.9 mm. Vertical elongation at point A resulted in relapse in both groups. Impaction of the maxilla led to further impaction as well. CONCLUSION: Cephalometric soft tissue analysis demonstrates the need for a two-jaw surgery, not only in severe maxillary hypoplasia. Alteration of soft tissue to functional harmony and three-dimensional correction of the maxillomandibular complex are easier to perform in a two-jaw procedure. It results in a more stable horizontal skeletal position of the maxilla.     

Soft tissue changes of the upper lip associated with maxillary advancement in obstructive sleep apnea patients.

PURPOSE: This retrospective study evaluated the horizontal and vertical soft tissue changes that occur with maxillary advancement surgery with a Le Fort I osteotomy with concomitant anatomic reorientation of the nasolabial musculature. SUBJECTS AND METHODS: Fifteen OSA patients who underwent maxillary advancement with a Le Fort I osteotomy without adjunctive nasal soft tissue procedures were studied after a minimum of 8 months of follow-up. The V-Y technique was used to close the maxillary vestibular incision. Only cases with minimal vertical movement (< 3.5 mm) in which no orthodontics were used were included. The average maxillary advancement was 8.0 +/- 2.5 mm, measured at the upper incisor (UPI) and the average vertical movement was 0.7 +/- 1.8 mm. The horizontal and vertical soft tissue change in subnasale (SN), labrale superiorus (LS), superior stomion (SS), nasal tip (NT), nasolabial angle (NLA), and lip length were measured in each patient and correlated with hard tissue measurements at anterior nasal spine (ANS) and UPI. The effect of lip thickness on these soft tissue changes also was evaluated. RESULTS: Using mean data, the horizontal soft-to-hard-tissue ratio for LS to UPI was 0.80:1, with a concomitant vertical (superior) soft tissue change to hard tissue advancement of 0.16:1. Lip length did not change significantly. All patients except 1 showed a slight decrease in nasolabial angle. The average decrease was 5 (range, -10 to +7 ). There was no statistically significant correlation between the degree of change in NLA and the amount of maxillary advancement. CONCLUSION: This study showed that advancement of the maxilla when controlling vertical movement resulted in the a hard-to-soft-tissue ratio of LS:UPI of 0.80:1. NLA did not change significantly.     

Soft tissue response to mandibular advancement and genioplasty.

Changes in facial esthetics after orthognathic surgery should be predictable if the results are to be satisfactory. The skeletal elements are moved in a planned and controlled manner, but the soft tissue drape is not as precisely managed. This study was on 31 patients who had undergone a mandibular advancement by means of a sagittal split osteotomy, 17 of whom had also received an advancement genioplasty and 6 received a maxillary impaction. The results showed a consistent 1:1 ratio of soft to hard tissue advancement at pogonion and B point, and that predictions could be accurate in both anteroposterior and vertical directions. When a genioplasty was added to the advancement, however, the results were much less consistent. The mean ratio was 0.9:1 of soft tissue to skeletal movement at pogonion, but the average difference between hard and soft tissue movement was +/- 2.6 mm. Thus the prediction of anteroposterior soft tissue changes was quite inaccurate. Changes in the vertical dimension were also more marked in the genioplasty group. The lower lip also showed a variable response, particularly in the genioplasty group, where the mean ratio was 0.5 mm lip advancement per 1.0 mm skeletal change, but again a range of 4.0 mm in either direction. There were no meaningful changes 1 year after surgery.     

正畸配合根尖下截骨术治疗严重双牙弓前突的临床研究

目的探讨骨性双牙弓前突患者经正畸正颌联合治疗后,颌面部硬组织、软组织在矢状方向上的变化及其相互关系,为临床矫治方法的选择提供参考。方法临床选择10例安氏Ⅰ类重度骨性双牙弓前突符合正颌手术的患者,术前正畸矫治完成后实施上、下前颌部截骨后退术（术中去除上下第一前磨牙牙骨块）,术后进一步正畸治疗以改善咬合关系。通过手术前后头影测量分析,比较颌面部硬组织,软组织在矢状方向上后退量及其相互关系。结果10例重度骨性双牙弓前突患者,经正畸一正颌联合矫治后,效果非常显著。上颌切牙平均后退7．13mm,上颌牙槽骨平均后退6．48mm,上颌软组织唇突点平均后移5．66nm。上颌硬、软组织后退的比例为1：0．87;下颌切牙平均后退6．62mm,下颌牙槽骨平均后退6．91mm,下颌软组织唇突点平均后移5．89mm。硬软组织后移的比值为1：0．85。结论重度骨性的双牙弓前突患者,应首选正畸正颌联合治疗,可彻底纠正前突的面型,上、下颌的硬软组织显著的内收,达到十分满意的疗效。     

Volumetric and linear changes at dental implants following grafting with volume-stable three-dimensional collagen matrices or autogenous connective tissue grafts: 6-month data

Objectives

The objective of this study was to test whether or not soft tissue augmentation with a volume-stable collagen matrix (VCMX) leads to similar volume gain around dental implants compared to autogenous subepithelial connective tissue graft (SCTG).

Materials and methods

In 12 adult beagle dogs, immediate implants were placed with simultaneous guided bone regeneration. After 25–45 weeks, soft tissue augmentation was randomly performed using VCMX, SCTG, or a sham-operated control. Impressions were taken pre-op and post-op (tissue augmentation) and again at sacrifice after healing periods of 4, 8, and 24 weeks. They were then digitized to allow for superimposition. Values of linear and volumetric changes were calculated.

Results

The median increase (pre-op to post-op) in buccal volume measured 0.92 mm for VCMX, 1.47 mm for SCTG, and 0.24 mm for SH. The values (pre-op to sacrifice) were ? 0.25 mm for VCMX, 0.52 mm for SCTG, and ? 0.06 mm for group SH. The median ridge width 2 mm below the crest measured ? 0.26 mm for VCMX, 0.53 mm for SCTG, and ? 0.15 mm for SH (pre-op to sacrifice).

Conclusions

Volume augmentation using VCMX and SCTG resulted in an increase in ridge dimension (pre- to post-op). During the follow-up, the volume decreased in all three groups to a level close to the situation prior to surgery.

Clinical relevance

Soft tissue volume augmentation around dental implants is usually performed using the patient’s own tissue. This therapy is associated with an increased morbidity due to a second surgical site. Soft tissue volume at implant sites can be augmented using VCMX and SCTG. The gain on top of the ridge appears not to be stable during the follow-up in both groups.

     

低角与均角安氏Ⅱ类1分类错(牙合)肌激动器治疗前后软硬组织变化

目的:探讨肌激动器对不同骨面型的安氏Ⅱ类1分类患者矫治前后软硬组织变化的影响.方法:纳入22例骨性安氏Ⅱ类1分类患者[(男12例,女10例,平均年龄(11.5 ±0.67)岁],根据其骨面型分为低角组(n=15)和均角组(n=7).肌激动器矫治前后拍摄头颅侧位定位片,头影测量分析治疗前后软硬组织的变化.用SPSS 13.0软件,t检验分析治疗结果差异.结果:所有患者治疗前后Co-Pg、ANB、Wits、NA-Pg、LI-APg和L6-MP值差异具有统计学意义(P＜0.05).骨组织项目中低角组和均角组治疗前后Wits值变化分别为1.34°±1.82°和3.50°±1.77°,NA-Pg值变化分别为(3.06±2.00) mm和(5.80 ±3.17) mm,牙齿项目中L1-APg变化值分别为(-1.16±1.74)mm和(-2.83±1.48)mm,组间差异均具有显著统计学意义(P＜0.05).低角与均角组软组织测量项目比较差异无统计学意义(P＞0.05).结论:肌激动器矫治低角和均角骨性安氏Ⅱ类1分类患者均能取得较理想的治疗效果,均角患者对矫治器的反映效果好于低角患者.     

基于深度学习的二维头影测量定点分析系统的研究

目的 探讨基于深度学习的图像高斯金字塔和卷积神经网络方法,构建和训练一种高精准度的自动化二维头影测量标志点定位与分析系统模型。方法 收集2021年1月至12月期间本院所摄的400张年龄在18至50周岁且无牙列缺损的头颅侧位影像,在3D slicer（NIH美国）上完成每张44个牙颌和颅面软硬组织结构标志点的标注,并构建和训练基于图像高斯金字塔和卷积神经网络的自动化二维头影测量标志点定位和分析系统。结果 运用图像高斯金字塔和卷积神经网络方法能高精准获取44个牙颌和颅面的软硬组织结构标志点,在 2.0 mm、2.5 mm、3.0 mm、4.0 mm 精度范围内预测的平均准确率分别为 85.61 %、90.72 %、93.82 %、96.34 %;44个牙颌和颅面软硬组织结构标志点的平均误差为 1.22 mm,平均标准差为 1.27 mm;常见头影测量项目（ANB、SNA、SNB、ODI、APDI、FHI、FMA、MW）的平均预测准确率为 85.00 % 。结论 运用图像高斯金字塔和卷积神经网络方法能高精准获取牙颌和颅面的软硬组织结构标志点,并且对牙颌和颅面形态分析诊断具有良好的准确性,该技术将有助于推进自动化头影测量的临床运用。     

Distraction osteogenesis for ridge augmentation: prevention and treatment of complications. thirty case reports

Distraction osteogenesis (DO) is the latest addition to the variety of alveolar ridge augmentation procedures used to increase the volume of bone prior to implant placement. Thirty DO procedures were performed in 30 patients using 17 intraosseous and 13 extraosseous devices to augment deficient alveolar ridges. Fifty-five implants placed in the distracted bone were followed for a period of 34 to 60 months after loading. Five implants failed, for a 90.9% success rate. Vertical augmentation ranged from 3.5 to 13.0 mm (average, 7.8 mm). At least one complication was encountered, requiring additional hard or soft tissue surgery, in each of the 30 reported cases. This paper reviews complications encountered in the DO-treated patients, suggesting solutions and measures to prevent these problems.     

软组织漂移对电磁导航经颊颅底穿刺影响的动物实验研究

目的：测试颊部软组织漂移对电磁导航经颊颅底穿刺精度的影响,从而推断电磁导航辅助半月神经节射频温控热凝术、颅底肿瘤穿吸活检或深部脓肿切排等的可行性。方法：3名初学者分别对3只6月龄山羊的双侧眶下裂进行盲穿和电磁导航辅助穿刺各5次,CT扫描测量穿刺针尖与眶下裂中心点的距离,采用SAS6.12统计软件的t检验和方差分析进行统计学比较。结果：3名实验者盲穿均未进入眶下裂,针尖与眶下裂中心点的平均间距右侧为15 mm,左侧为14.3 mm;电磁导航辅助穿刺时,测量颊部软组织中针尖与预设路径的平均偏差为4.3 mm/6.2,°终点均进入眶下裂,针尖与眶下裂中心点的平均间距右侧为2.7 mm,左侧为2.8 mm;盲穿与导航辅助存在统计学差异（P值范围于0.0008与0.0239之间）。结论：由于终点为骨性孔隙结构,穿刺中途的软组织漂移不影响电磁导航系统的穿刺精度,因此电磁导航可用于半月神经节射频温控热凝术、颅底肿瘤穿吸活检或深部脓肿切排等的精确穿刺。     

Frontal soft tissue analysis using a 3 dimensional camera following two-jaw rotational orthognathic surgery in skeletal class III patients

Although two dimensional cephalometry is the standard method for analyzing the results of orthognathic surgery, it has potential limits in frontal soft tissue analysis. We have utilized a 3 dimensional camera to examine changes in soft tissue landmarks in patients with skeletal class III dentofacial deformity who underwent two-jaw rotational setback surgery.We assessed 25 consecutive Asian patients (mean age, 22 years; range, 17–32 years) with skeletal class III dentofacial deformities who underwent two-jaw rotational surgery without maxillary advancement. Using a 3D camera, we analyzed changes in facial proportions, including vertical and horizontal dimensions, facial surface areas, nose profile, lip contour, and soft tissue cheek convexity, as well as landmarks related to facial symmetry.The average mandibular setback was 10.7 mm (range: 5–17 mm). The average SNA changed from 77.4° to 77.8°, the average SNB from 89.2° to 81.1°, and the average occlusal plane from 8.7° to 11.4°. The mid third vertical dimension changed from 58.8 mm to 57.8 mm (p = 0.059), and the lower third vertical dimension changed from 70.4 mm to 68.2 mm (p = 0.0006). The average bigonial width decreased from 113.5 mm to 109.2 mm (p = 0.0028), the alar width increased from 34.7 mm to 36.1 mm (p-value = 0.0002), and lip length was unchanged. Mean mid and lower facial surface areas decreased significantly, from 171.8 cm² to 166.2 cm² (p = 0.026) and from 71.23 cm² to 61.9 cm² (p < 0.0001), respectively. Cheek convexity increased significantly, from 171.8° to 155.9° (p = 0.0007).The 3D camera was effective in frontal soft tissue analysis for orthognathic surgery, and enabled quantitative analysis of changes in frontal soft tissue landmarks and facial proportions that were not possible with conventional 2D cephalometric analysis.     

Chin augmentation with various alloplastic materials: a comparative study

This retrospective study of 62 patients compared three alloplastic materials used in chin augmentation: Proplast I (PI), Proplast II (PII), and porous block hydroxyapatite (PBHA). There were 25 patients with PI implants (average follow-up of 44.8 months), 25 patients with PII implants (average follow-up of 32.8 months), and 12 patients with PBHA implants (average followup of 19.1 months). Average bone resorption was 1.25 mm (range 0.00 to 3.30 mm) beneath the PI and PII implants and 0.00 mm beneath the PBHA implants. Average posterior settling was 0.46 mm (range 0.00 to 2.00 mm) for the PI and PII implants and 0.03 mm (range 0.00 to 0.17 mm) for the PBHA implants. The percentage of soft tissue change at pagonion relative to the size of the implant was 83.0% (range 66.7% to 100.0%) for PI and PII and 86.8% (range 77.3% to 100.0%) for the PBHA implants. When PI or PII implants were used, younger patients had more resorption than older patients. Slightly more resorption was found with PI and PII implants when maxillary surgery was performed. The size of the PI or PII implants made no difference in the amount of bone resorption, although there was slightly less soft tissue change when larger implants were used. Males had slightly more bone resorption than did females. The bone resorption beneath the PI and PII implants occurred within the first 12 months postsurgery. It can be concluded from this study that PI and PII implants are acceptable materials for chin implants, but some resorption can be expected during the first 12 months postsurgery. The absence of detectable resorption and the excellent soft tissue change make PBHA an attractive alternative as a chin implant material, although it is technically more difficult to use.     

Soft tissue augmentation in connection to dental implant treatment using a synthetic, porous material - a case series with a 6-month follow-up

Background: Bony defects/concavities in the aesthetic zone of maxillae may interfere with the results of prosthetic procedures by producing shading superior to the crown. Such regions can be augmented either by bone or soft tissue autografts, allografts, or xenografts. Tissue shrinkage is thus anticipated, and a method to objectively measure the tissue change is valuable. Purpose: The aim of this study was to evaluate the use of a synthetic, porous material made of polyurethaneurea for buccal soft tissue augmentation in connection with implant placement in the maxillary front region. Further, to measure over time the change in buccal contour using a computerized technique. Materials and Methods: Ten patients received 12 Artelon® cylinders (5 × 10 mm) in connection to implant placement. Preoperative and postoperative (at 3 and 6 months) study casts were obtained for computer measurements, using the preoperative reference model as a base. The volume created between the surfaces of the reference model and each of the two following superimposed models was measured in cubic millimeter. Differences in volume from pretreatment to 3 and 6 months, respectively, were compared. Results: The clinical observation during follow‐up showed normal healing. The increase in mean buccal tissue volume was 50 mm³ (SD 18) after 3 months and 43 mm³ (SD 21) after 6 months, measured over a 6 mm × 8 mm area in the maxillary front region, in comparison to before insertion of the cylinder. The reduction from 3 to 6 months was not statistically significant (p = .17). Conclusion: A synthetic, porous material for soft tissue augmentation was tested in connection to implant placement in the aesthetic zone of maxillae. The buccal contour was followed‐up for 6 months using a computer volumetric technique on preoperative and postoperative study casts. Measured tissue volume showed an obvious increase during the study period. The material was biologically well received.     

Three-dimensional soft tissue change after paranasal augmentation with porous polyethylene

The aim of this study was to investigate the effect of porous polyethylene (PPE) in paranasal augmentation on midfacial soft tissue architecture. This retrospective study recruited patients with midface retrusion and mandibular prognathism. Twenty adult patients who had undergone bilateral PPE augmentation (ready-made type, thickness 4.5 mm, Medpor) to the piriform aperture and simultaneous mandibular setback surgery were included in this study. The soft tissue morphology and thickness of the midface were evaluated using three-dimensional reformatted images from cone beam computed tomography done before and 6 months after surgery. The soft tissue outline of the midface was augmented 1–4 mm. The average increase in soft tissue outline near the peri-alar region was 3.1–3.4 mm, which comprised 68–74% of the PPE thickness (P < 0.01). The nasolabial angle and columellar inclination were increased significantly (2.2° and 1.4°, respectively; both P < 0.05), whereas the nasal tip angle, nasal tip protrusion, columellar length, and bilateral nostril axis angle did not change. The alar base became wider on average by 2.2 mm (P < 0.01). The results showed that paranasal augmentation with PPE significantly increased the overlying soft tissue outline without influencing the nasal projection and could enhance paranasal aesthetics with minimal morbidity.     

骨性III类错患者双颌术后面部各区域软组织三维改变的研究

目的 探究骨性Ⅲ类错畸形患者双颌手术后面部各区域软组织的变化特点。 方法 2017—2019年于我院就诊的18例骨性Ⅲ类错畸形患者，男女各9例。使用3dMD摄影测量系统分别于双颌手术前一周内任一天和术后6个月拍摄患者面部图像，并通过Geomagic Qualify软件对手术前后的面部图像进行三维重建和匹配，分割各个面部区域，得出面部各区域软组织的变化量。 结果 术后颞区（R1）软组织改变量为-0.17 mm,颧弓区（R4）为-0.42 mm,下口角旁区（R11）为-0.81 mm，下唇及颏区（M3）为-3.08 mm，呈负向改变（P＜0.05）；眶下区（R2）软组织改变量为0.29 mm，鼻翼旁区（R5）为1.58 mm，上口角旁区（R8）1.08 mm，鼻区（M1）为0.59 mm，上唇区（M2）为2.05 mm，呈正向改变（P＜0.05）；左右两侧相同面部区域的软组织变化无统计学差异（P>0.05）；同区域男性与女性的软组织变化差异无统计学意义（P>0.05）。 结论 骨性Ⅲ类错畸形患者双颌手术后颞区、颧弓区、下口角旁区、下唇及颏区的软组织变得凹陷，而眶下区、鼻翼旁区、上口角旁区、鼻区、上唇区的软组织变得凸出。术后左右侧相同面部区域的软组织改变无差异，性别对术后面部各区域软组织的改变没有影响。     

Morphologic changes in the perioral soft tissues in patients with mandibular hyperplasia using a laser system for three-dimensional surface measurement

Soft tissue changes following correction of mandibular hyperplasia were studied using a laser system for three-dimensional (3-D) surface measurement. Twelve subjects (7 men and 5 women; age 17-48 years) were included in this study. Bilateral sagittal split ramus osteotomies were performed in ten patients and intraoral vertical ramus osteotomies in two patients. Pre- and postoperative images, obtained with the laser system, were superimposed to determine distribution of changes in the perioral soft tissue. Mean volume changes were 1032.3 mm3 in the Subnasale-UL area and 8700.9 mm3 in the LL-Menton area. Changes in both areas were symmetrical around the mid-sagittal plane in some patients and asymmetrical in others. This measurement system provided a simple method of determining 3-D changes in soft tissue following surgery and might be useful for clinical purposes.     

Long-term stability of isolated advancement genioplasty,and influence of associated risk factors: A systematic review

The aim of this review was to investigate the skeletal and soft tissue stability of isolated advancement genioplasty after more than 1 year, and to observe the influence of associated risk factors.A literature search was performed on PubMed, Web of Science, Embase, ScienceDirect, and Cochrane. Only studies with at least 10 patients who underwent an isolated advancement genioplasty, and with a follow-up period of at least 1 year, were included.Of the 2224 records initially identified, eight articles met the eligibility criteria. The mean age of the total study population was 23 years and ranged from 19.1 to 26.5 years in the individual studies. The average surgical advancement at pogonion was 8.2 mm and ranged from 6.2 to 11.7 mm in the individual studies. After 1 year, the horizontal hard tissue relapse at the level of pogonion varied from 0.1 to 2.1 mm. In two studies, this was reported as statistically significant. Regarding the soft tissue, the horizontal relapse varied from 0.3 to 2.9 mm, which was also considered statistically significant in two studies.Isolated advancement genioplasty was found to be a predictable and stable orthognathic procedure in the sagittal plane at both soft and hard tissue levels. The amount of relapse was not associated with the fixation method or with the amount of surgical advancement.