Paradigm Shift in Rhinoplasty with Virtual 3D Surgery Software and 3D Printing Technology.

Most Asians have a nose with a short columella and a low dorsum; augmentation rhinoplasty using implants is commonly performed in Asian countries to achieve a taller and more well-defined nasal dorsum. However, the current knowledge is insufficient to fully understand the various subjective desires of patients, reflect on them during surgery, or to objectively analyze the results after surgery. Advances in digital imaging technologies, such as 3D printing and 3D scanning, have transformed the medical system from hospital-centric to patient-centric throughout the medical field. In this study, we applied these techniques to rhinoplasty. First, we used virtual 3D plastic surgery software to enable surgical planning through objectified numerical calculations based on the visualized data of the patient's medical images rather than simple virtual plastic surgery. Second, the customized nasal implant was manufactured by reflecting the patient's anatomical shape and virtual 3D plastic surgery data. Taken together, we describe the surgical results of applying these rhinoplasty solutions in four patients. Our experience indicates that high fidelity and patient satisfaction can be achieved by applying these techniques.

Triple Strut Concept for the Nasal Tip Projection in Small Lower Lateral Cartilages and Septum.

INTRODUCTION: This study aimed to evaluate the effectiveness of the triple strut graft technique for nasal tip projection in Asian patients with weak and small lower lateral cartilages and septum. The technique uses a combination of septal angle strut and, columellar strut grafts and lateral crural repositioning to provide support for the nasal tip. METHODS: The study included 30 Asian patients who underwent primary rhinoplasty using this technique between January 2019 and December 2021. The surgical procedure involved making an open rhinoplasty incision and performing a scroll area release. A small triangular-shaped septal angle strut graft was then placed, and the lower lateral cartilages were suspended anteriorly and placed on the anterior end of the septal angle after a columellar strut graft was performed between both medial crura. The lateral crura of the lower lateral cartilages were transposed medially on top of the upper lateral cartilages and maintained in place by spanning sutures at the cephalic margins of both lateral crura. RESULTS: The triple strut graft technique was shown to be effective in providing stable tip projection in Asian noses with weak and small lower lateral cartilages and septum. Statistically significant differences were found between the preoperative and postoperative values of the nasal tip projection ratio and Rhinoplasty Outcome Evaluation ( P < 0.05). CONCLUSIONS: The triple strut graft tip projection technique can be an effective surgical option for Asian patients who have weak and small medial crura combined with a small septum, providing stability for the nasal tip projection.

Role of Derotation Suture in Bulbous Tip Correction in Asian Rhinoplasty.

ABSTRACT: In bulbous tip correction, consideration should be given to the presence of cephalic malposition of lower lateral cartilage as well as volume reduction. Derotation suture is a suture technique for tip lengthening but may contribute to bulbous tip correction through the caudal reposition of lower lateral cartilage.From 2016 to 2018, a total of 50 Asian patients underwent bulbous tip correction with derotation suture. The derotation suture was performed by suture the most convex part of lower lateral cartilage as a spanning suture to the caudal septum with caudal traction of the lateral crus. The chart and pre and postoperative photographs were analyzed to evaluate the effectiveness and complication of the surgery.In most (96%) patients, there was a significant improvement in tip bulbosity and supratip fullness. Complications included tip drooping (4%), nostril asymmetry (2%), and undercorrection (4%) and no pinching deformity occurred.In correction of bulbous tip of Asians with cephalic malposition of lower lateral cartilage, derotation suture is a useful method to create an ideal shaped nasal tip.CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, V.

Cosmetic Augmentation Rhinoplasty for East Asians.

Symmetric pocket formation and meticulous implant carving are the most critical parts of nasal dorsal augmentation using implants. Innovative three-dimensional printed nasal implants can exactly fit the nasal dorsal contour, decreasing the chance of deviation and malpositioning. Vertically oriented folded dermal graft technique can avoid the high resorption rate of conventional dermofat grafts. Multilayered costal cartilage graft technique for dorsal augmentation can minimize warping and difficulty in the graft carving. Derotation graft allows supple and movable nasal tip while enabling enough tip lengthening, even if the septal extension graft is the most commonly performed procedure for short nose correction.

Correction of the deviated tip and columella in crooked nose.

The primary procedural components of deviated nose correction are as follows: osteotomy to correct bony deviation, septal deviation correction, manipulation of the dorsal septum to correct upper lateral cartilage deviation, and correction of functional problems (manipulation for correction of internal valve collapse and hypertrophy of the inferior turbinate). The correction of tip and nostril asymmetry cannot be overemphasized, because if tip and nostril asymmetry is not corrected, patients are unlikely to provide favorable evaluations from an aesthetic standpoint. Tip asymmetry, deviated columella, and resulting nostril asymmetry are primarily caused by lower lateral cartilage problems, which include deviation of the medial crura, discrepancy in the height of the medial crura, and asymmetry or deformity of the lateral crura. However, caudal and dorsal septal deviation, which is a more important etiology, should also be corrected. A columellar strut graft, correction of any discrepancy in the height of the medial crura, or lateral crural correction is needed to correct lower lateral cartilage deformation depending on the type. In order to correct caudal septal deviation, caudal septal shortening, repositioning, or the cut-and-suture technique are used. Surgery to correct dorsal septal deviation is performed by combining a scoring and splinting graft, a spreader graft, and/or the clocking suture technique. Moreover, when correcting a deviated nose, correction of asymmetry of the alar rim and alar base should not be overlooked to achieve tip and nostril symmetry.

Multilayered Costal Cartilage Graft for Nasal Dorsal Augmentation.

BACKGROUND: Nasal dorsal augmentation is one of the most commonly performed rhinoplasty procedures in Asia. We describe our experience with multilayered costal cartilage grafting (MCG) for dorsal augmentation in Asian patients. We aimed to evaluate the aesthetic outcomes and complications of MCG in comparison with those of one-block concentric carving costal cartilage graft (OCG) using objective and subjective assessment criteria. METHODS: Eighty-two consecutive patients who underwent dorsal augmentation with OCG (n = 39) or MCG (n = 43) by a single surgeon between November 2010 and September 2018 with > 12 months of follow-up were included in this retrospective cohort study. The aesthetic outcomes, which were determined by both anthropometric analysis and consensus decision, were compared. Patients' satisfaction and postoperative complications were also analyzed. RESULTS: Dorsal height ratios and radix height ratios increased significantly by 14.0% and 19.4%, respectively, after the OCG technique (p < 0.001) and by 13.5% and 19.0%, respectively, after the MCG technique (p < 0.001). Anthropometric comparison revealed that OCG did not show any significant differences in dorsal height ratio (p = 0.707) and radix height ratio (p = 0.856) postoperatively when compared with MCG. However, the warping rate was higher in the OCG (15.4%) than in the MCG (4.7%) group, although not significantly. There were no differences in overall patient satisfaction between the two groups. CONCLUSIONS: Dorsal augmentation with MCG produces similar aesthetic outcomes but a lower warping rate than that with OCG. The MCG technique may minimize graft warping and thus might be an effective alternative for nasal dorsal augmentation, particularly in Asian rhinoplasty. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

A Novel Technique of Asian Tip Plasty: Rein-Shaped Columellar Strut Graft.

BACKGROUND: The columellar strut graft is one of the most commonly used invisible grafts in tip plasty techniques for nasal tip projection. However, the columellar strut graft induces cephalic rotation of the dome with nasal tip projection. This is an effective change in Western people with a long nose; however, this change should be avoided in Asians who have a relatively short nose and visible nostrils. We designed a more convenient and effective technique using a rein-shaped columellar strut graft that can prevent cephalic rotation of the dome. METHODS: A total of 32 patients underwent surgery with a rein-shaped columellar strut graft with a septal cartilage. The projection and location of the nasal tip, nasal length, and nasolabial angle were measured after taking a photograph of the lateral view, and the preoperative and postoperative results were compared. RESULTS: There were statistically significant differences between the preoperative and postoperative values of the nasal tip projection ratio and nasal tip location ratio. There were no revision surgeries and no direct complications associated with the use of the columellar strut graft. CONCLUSION: We performed tip plasty with a modified columellar strut graft-the rein-shaped columellar strut graft. In most cases of using this method, the tip projection was increased and the cephalic rotation of the tip was prevented. This surgical procedure can also be used for lengthening (rotating caudally) of the nose in some cases, as well as for the purpose of preventing the cephalic rotation of the tip. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Correction of deviated nose.

Deviated nose deformities have always been a surgical challenge, and it is essential to achieve both functional and esthetic improvements. Various techniques have evolved over time to correct deviated noses but no one method applies in all cases. Successful correction requires a complete understanding of the various surgical techniques and concepts, including the three-dimensional nasal structure and the time-related changes to surgically-treated noses.

Dorsal Augmentation Using Autogenous Tissues.

Autogenous materials used for Asian dorsal augmentation are temporal fascia, dermofat, solid block type of costal cartilage, and diced cartilage. The temporal fascia is used for radix augmentation or correction of minor focal depression. Dermofat, solid block costal cartilage, and diced cartilage are recommended for major dorsal augmentation. The vertically oriented folded dermal graft curtails use of the fat component. Diced cartilage wrapped in temporal fascia exhibits a lower resorption rate, and may easily fit into the contour of the dorsum. This graft is thought to have low predictability of final height, as opposed to that of block cartilage.

Use of Irradiated Homologous Costal Cartilage in Rhinoplasty: Complications in Relation to Graft Location.

BACKGROUND: Nasal septal cartilage and conchal cartilages are preferred sources of grafts in augmentation rhinoplasty. Rib cartilage can also be used, but it may evoke a patient's concerns about a scar and an extensive surgery. In such cases, irradiated homologous costal cartilage (IHCC) can be a useful alternative. However, controversy still exists in many literatures regarding complications with use of IHCC. Therefore, the authors reviewed our experiences with IHCC in rhinoplasty and analyzed the complications in relation to graft location. METHODS: A retrospective chart review was made of all patients who underwent rhinoplasty with IHCC between 2007 and 2015. A total of 323 patients were included. The authors considered the cases that required revision surgery for external aesthetic changes as complications. The authors defined major complications, including resorption, infection, fracture, or warping. RESULTS: The total complication rate was 8%. Two fractures (0.6%), 4 fragmentation (1.2%), 4 resorptions (1.2%), 4 infections (1.2%), and 2 warpings (0.6%) were noted. Most of these complications occurred for the septal extension graft. Other complications, including 1 nasal obstruction, 2 visible contours, 3 caudal septal deviations, and 4 cases of unfavorable results (patient unsatisfactions), were noted. CONCLUSIONS: Based on the outcomes of this study, the authors concluded that IHCC is a useful and reliable source of cartilage graft and can serve as an alternative graft material for rhinoplasty. However, care must be taken in use of IHCC graft in areas under tension such as septal extension graft, though its complication rate is low.

Augmentation Rhinoplasty With Silicone Implant Covered With Acellular Dermal Matrix.

BACKGROUND: Alloplastic materials are a mainstay in Asian rhinoplasty. However, the outline of alloplastic implants can become conspicuous over time in rhinoplasty patients, which is a significant cause for revision. In revision rhinoplasty, alloplastic materials can remain a viable and affordable option in Asian patients. The acellular dermal matrices (ADM) are often used to interface between the silicone material and the skin envelope. This study assesses histologic changes following implantation of ADM-covered silicone material in rats. METHODS: To demonstrate differences at the histologic level, silicone blocks with and without ADM were implanted in the subcutaneous plane of 10 rats. These implants were harvested after 9 weeks and examined histologically for capsule thickness and myofibroblast activity. RESULT: In the in vivo study, the presence of ADM was associated with significantly decreased capsule thickness and myofibroblast activity around the implant and maintained the structure of ADM well. CONCLUSION: The authors suggest that using the ADMs to cover silicone implants can be an alternative method for decreasing the visibility of implant contour, by the prevention of capsular contracture and the addition of a soft tissue layer to the dorsal skin envelope.

A Novel Technique for Short Nose Correction: Hybrid Septal Extension Graft.

BACKGROUND: There are many techniques for correcting short nose deformities and the septal extension graft is the most commonly performed technique among Asians. In many Asian patients septal cartilage, however, is too small and insufficient to perform an effective septal extension graft. Therefore, we designed a novel technique, named hybrid septal extension graft to overcome this pitfall in Asian tip plasty. METHODS: From February 2010 to March 2013, 41 patients with primary (N = 30) or secondary (N = 11) short nose deformity underwent a hybrid septal extension graft. The hybrid septal extension graft is a modified septal extension graft which uses the small septal cartilage along with irradiated homologous costal cartilage. Irradiated homologous costal cartilage was carved into a shape of a thin batten and securely fixed bilaterally to the caudal septum. Harvested septal cartilage was located between the 2 irradiated homologous costal cartilage batten grafts and fixed with sutures. Then, the alar cartilage was fixed at the end of the septal cartilage graft. The nasal lengths, nasal tip projections, and nasolabial angles were measured pre- and postoperatively. RESULTS: The hybrid septal extension graft showed enough nose lengthening and a decreased nostril show, even in cases with a very small septal cartilage. CONCLUSIONS: The authors present a novel technique for correction of short nose deformity in Asians. The hybrid septal extension graft provides good results with minimal complications and overall patient satisfaction was very high.

Effective Use of a Silicone-induced Capsular Flap in Secondary Asian Rhinoplasty.

SUMMARY: Performing secondary rhinoplasty in patients who underwent primary rhinoplasty using a silicone implant is difficult due to thinning of nasal skin and formation of a capsule. Excess capsule formation can cause capsular contracture, resulting in short nose deformity or implant deviation, migration, or implant demarcation. Revision rhinoplasty using a capsular flap, dorsal silicone implant, and tip plasty was performed in 95 Korean patients (91 women and 4 men; mean age, 27 years) who previously underwent primary augmentation rhinoplasty using silicone implants. The capsular flap was composed by creating a dual plane above the anterior capsule and below the posterior capsule. The existing silicone implant was removed, and a new silicone implant was placed under the posterior capsule. The patients were followed up for 6 months to 4 years (mean, 31.7 months). Of the 95 patients who underwent secondary augmentation rhinoplasty using a capsular flap, 88 patients (92.6%) showed satisfactory results. There was no hematoma or nasal skin vascular compromise. There was no visible or palpable capsule resorption or recurrent capsular contracture. Early implant malpositioning (within 30 days postoperatively) was observed in 4 patients, and tip shape dissatisfaction (within 60 days postoperatively) was reported by 3 patients. Four patients underwent revision surgery and had successful outcomes. Nasal augmentation using a silicone implant and capsular flap in secondary rhinoplasty avoids complications caused by removal of the capsule. Recurrent capsule formation or clinically noticeable resorption of the capsular flap was not observed in this study.

L-shaped columellar strut in East asian nasal tip plasty.

BACKGROUND: Nasal tip support is an essential consideration for rhinoplasty in East Asians. There are many techniques to improve tip projection, and among them, the columellar strut is the most popular technique. However, the conventional design is less supportive for rotating the tip. The amount of harvestable septal cartilage is relatively small in East Asians. For an optimal outcome, we propose an L-shaped design for applying the columellar strut. METHODS: To evaluate the anthropometric outcomes, the change in nasal tip projection and the columella-labial angle were analyzed by comparing preoperative and postoperative photographs. The anthropometric study group consisted of 25 patients who underwent the same operative technique of an L-shaped strut graft using septal cartilage and were followed up for more than 9 months. RESULTS: There were statistically significant differences between the preoperative and postoperative values in the nasal tip projection ratio and columella-labial angle. We did not observe any complications directly related to the L-shaped columellar strut in the anthropometric study group. CONCLUSIONS: The L-shaped columellar strut has advantages not only in the controlling of tip projection and rotation, but in that it needs a smaller amount of cartilage compared to the conventional septal extension graft. It can therefore be an alternative technique for nasal tip plasty when there is an insufficient amount of harvestable septal cartilage.

A 2-year follow-up of irradiated homologous costal cartilage used as a septal extension graft for the correction of contracted nose in Asians.

BACKGROUND: Septal extension graft is a useful method for the correction of contracted nose. When septal or costal cartilage is not available, irradiated homologous costal cartilage (IHCC) may be an alternative choice. This preliminary study is focused on noninfective absorption and other complications and postoperative changes of nasal length after septal extension graft using IHCC. METHODS: Thirty patients who could be observed for more than 2 years postoperatively were assessed. All patients had contracted nose deformities with a history of an inflammatory contracture after previous aesthetic surgical procedures. The IHCC was used only as a septal extension graft in each patient. Nasal length was analyzed by comparing preoperative and 2-year postoperative photographs. RESULTS: There was no noticeable graft warping or infective IHCC absorption. However, 3 patients underwent revision: 2 cases of graft avulsion fracture and 1 case of minimal nasal obstruction. Nasal length, which had increased an average of 8.5% after the procedure, was maintained at follow-up 2 years postoperatively. CONCLUSIONS: The IHCC has the advantages of avoiding donor-site scars, and also provides the same benefits as autogenous costal cartilage. It can therefore be a reliable alternative material for rhinoplasty. A longer follow-up may be necessary to confirm the structural stability of the IHCC graft in the lengthened caudal septum.