• Archives of Plastic Surgery
• /
• 제33권2호
• /
• pp.255-258
• /
• 2006

Nasions are flat and located more caudally in Asian than in Caucasian. Implant insertions in rhinoplasties are apt to move nasions more cephallic, which can cause unsatisfactory results in Asian. The purpose of this study is introducing a simple technique in rhinoplasty avoiding unnatural nasion in augmentation rhinoplasty in Asian patients. Multiple radiating incisions were made at nasion level on inner side of silicone implant to fit it into the curvature around the nasion. Between October 2001 and October 2003, 27 patients underwent augmentation rhinoplasties using this technique and results were evaluated. Preoperative and postoperative photographs of patients were used to measure the levels of nasion from medial canthus. The mean nasion level from medial canthus of preopertive patients were $3.46{\pm}0.87mm$ and postoprative patient was $4.98{\pm}0.96mm$. The mean difference between preoperative nasion level and postoperative nasion level was 1.52 mm. There was no complication such as extrusion, displacement or infection. This technique of radiating incisions on inner side of the silicon implant can minimize cephalic migration of the nasion level in augmentation rhinoplasty in Asian.

• 대한두개안면성형외과학회지
• /
• 제20권6호
• /
• pp.347-353
• /
• 2019

Most orbital surgeons believe that it's difficult to restore the primary orbital wall to its previous position and that the orbital wall is so thin that cannot be firmly its primary position. Therefore, orbital wall fractures generally have been reconstructed by replacing the bony defect with a synthetic implant. Although synthetic implants have sufficient strength to maintain their shape and position in the orbital cavity, replacement surgery has some drawbacks due to the residual permanent implants. In previous studies, the author has reported an orbital wall restoring technique in which the primary orbital wall fragment was restored to its prior position through a combination of the transorbital and transantral approaches. Simple straight and curved elevators were introduced transnasally to restore the orbital wall and to maintain temporary extraorbital support in the maxillary and ethmoid sinus. A transconjunctival approach provided sufficient space for implant insertion, while the transnasal approach enabled restoration of the herniated soft tissue back into the orbit. Fracture defect was reduced by restoring the primary orbital wall fragment to its primary position, making it possible to use relatively small size implant, furthermore, extraorbital support from both sinuses decreased the incidence of implant displacement. The author could recreate a natural shape of the orbit with the patient's own orbital bone fragments with this dual approach and effectively restored the orbital volume and shape. This procedure has the advantages for retrieving the orbital contents and restoring the primary orbital wall to its prior position.

• 대한방사선기술학회지:방사선기술과학
• /
• 제43권5호
• /
• pp.337-341
• /
• 2020

Although the screening with a mammography has been shown to be economical, simple and effective in detecting breast cancer, it is accompanied by the risk from radiation. Therefore, this study analyzed the glandular dose and organ dose according to the target-filter combination and the presence and absence of implants using Monte Carlo simulation. The results indicate that at a tube voltage of 30 kV and a tube current of 50 mAs, the dose increased in the order of Mo/Mo. Mo/Rh, Rh/Rh and W/Rh in proportion to the atomic number of the target-filter. In addition, in phantom without implant a reduction in dose was seen when compared to the phantom with implant. The organ dose was highest in the lens except for the breast on the examination side regardless of the presence or absence of the implant. These results may contribute to use basic data for the diagnostic reference level of breast plastic surgery patients.

• The Journal of Advanced Prosthodontics
• /
• 제6권1호
• /
• pp.66-70
• /
• 2014

A dynamic impression is a functional impression that records the functional movement of the patient's own muscle and muscle attachment. This process reduces the number of random factors. This article describes a method for making a special tray using a dynamic impression concept that was made from provisional dentures used for implant healing. The individual tray is used to make a wash-impression to record the features of the mucosa in detail. The main advantage of this technique is that it provides a functional relationship of the implant components to the supporting tissues without overextension because provisional denture had been used for 2 months and the border length of individual tray was nearly the same as that of provisional denture. The delivery of the prosthesis constructed using this impression technique is time-saving because there is no need for border molding and there are fewer post-insertion appliance adjustments.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제36권3호
• /
• pp.116-123
• /
• 2014

Purpose: The purpose of this study was to evaluate risks for wound dehiscence after guided bone regeneration (GBR) in dental implant surgery. Methods: Patients who received dental implant therapy with GBR procedure at Seoul National University Bundang Hospital (Seongnam, Korea) from June 2004 to May 2007 were included. The clinical outcome of interest was complications related to dental implant surgery. The factors influencing wound dehiscence, classified into patient-related factors, surgery-related factors and material-related factors, were evaluated. Results: One hundred and fifteen cases (202 implants) were included in this study. Wound dehiscence (19.1%) was considered a major complication. The risk of wound dehiscence was higher in males than in females (odds ratio=4.279, P =0.014). In the main graft, the allogenic group had the lowest risk of wound dehiscence (odds ratio=0.106, P =0.006). Though the external connection group had a higher risk of wound dehiscence than the internal connection group (odds ratio=2.381), the difference was not significant (P =0.100). Conclusion: In this study, male gender and main graft have the highest risk of wound dehiscence. To reduce wound dehiscence after GBR, instructions on postoperative care with supplementary procedure for the protection of the wound dehiscence is recommended, especially to male patients. A main graft with a gel base can reduce the risk of wound dehiscence.

• 대한치과보철학회지
• /
• 제54권1호
• /
• pp.57-64
• /
• 2016

악교정 수술과 임플란트 보철을 통한 전악재건술의 임상적 치료는 보철과 의사에게 도전적인 과제이다. 본 증례는 골격적 부조화를 가진 다발성 우식증 환자의 진단과 치료에 있어서 치의학의 여러 분야의 협진을 보여주었다. 그 결과로 악교정 수술을 동반한 발치 후 즉시 임플란트 식립 및 조기 하중을 가하는 임플란트 보철물에 의한 전악 재건이 예견가능하고 효과적인 치료 방법이었기에 이를 보고하고자 한다.

• Journal of Dental Anesthesia and Pain Medicine
• /
• 제19권4호
• /
• pp.239-244
• /
• 2019

The effectiveness of dental implants in patients with disability, who are non-compliant during treatment, is controversial because of their poor oral health. Thus, oral health-care and management in such patients is concerning. Moreover, limited information is available on prognosis after implant placement. Herein, we describe a patient with schizophrenia who underwent dental implantation under multiple inductions of general anesthesia (5 times) and required conservative treatment and tooth extraction for multiple dental caries and retained roots because of inadequate oral health-care. Postoperatively, fracture of the prosthodontics and progression of dental caries were observed, and with 3 additional inductions of general anesthesia, conservative treatment, implant surgery, and prosthesis implantation were conducted. Postoperative 12-month follow-up since the last prosthesis implantation showed successful results. For patients with schizophrenia, multiple implantation can reduce horizontal bone loss and achieve aesthetic results compared to treatment with removable prosthodontics and could serve as an alternative treatment modality.

• Journal of Korean Biological Nursing Science
• /
• 제21권1호
• /
• pp.12-21
• /
• 2019

Purpose: The purpose of this study was to review previous literature with an aim to explore the sleep disturbance level after a patient undergoes cataract surgery using an integrative review. Methods: We used the key words, 'cataract surgery', 'sleep', and 'intraocular lens' to find peer-reviewed publications in seven databases. Among 450 searched articles, eight articles were selected after exclusion of articles that did not meet the criteria. Results: Five of the articles submitted that subjective sleep quality of the patients with blue-filtering intraocular lens (BF-IOL) implant improved as compared to that before surgery. The change of saliva melatonin concentration after BF-IOL implant did not coincide in two of the articles. Two of the articles reported an increased level of intrinsically photosensitive retinal ganglion cells response after BF-IOL implantation. Conclusion: The published studies stated that BF-IOL implant did not have any negative impact on quality of sleep among cataract patients suffering with poor sleep. Rregardless of intraocular lens type, cataract surgery may increase photoreception of intrinsically photosensitive retinal ganglion cells one year after surgery although the mechanism was not clear. It is necessary to identify various factors influencing the quality of sleep such as gender and activities among cataract patients with BF-IOL implant in the future.

• Journal of Yeungnam Medical Science
• /
• 제38권3호
• /
• pp.175-182
• /
• 2021

Breast implant-associated anaplastic large-cell lymphoma (BIA-ALCL) is a rare T-cell non-Hodgkin lymphoma characterized as CD30 positive and anaplastic lymphoma kinase (ALK) negative. In 2016, the World Health Organization declared BIA-ALCL as a new disease entity. The first case of BIA-ALCL was reported in 1997, and as of July 2019, the United States Food and Drug Administration had cited a total of 573 United States and global medical device reports of BIA-ALCL, including 33 deaths. In all clinical case reports, except for those with unknown clinical history, the patient had received at least one textured surface breast implant. Although the etiology is not yet clear, chronic inflammation has been proposed as a potential precursor to tumorigenesis. The most common presentation of BIA-ALCL is peri-implant fluid collection following aesthetic or reconstructive implantation with textured surface breast implants. It can be accompanied by breast swelling, asymmetry, pain, skin lesions, lymphadenopathy, and B-type symptoms. Most cases are detected on average 7 to 10 years after implantation. Diagnostic specimens can be obtained with fine-needle aspiration or biopsy. BIA-ALCL is CD30 positive, epithelial membrane antigen positive, and ALK negative. It can be cured with complete surgical excision at the T1-T3 stage.

• Journal of Periodontal and Implant Science
• /
• 제51권6호
• /
• pp.433-443
• /
• 2021

Purpose: This study aimed to evaluate the effectiveness of the partial split-flap technique with a K-incision on vertical guided bone regeneration (vGBR) and to retrospectively analyze the clinical and radiographic outcomes of dental implantation using this approach. Methods: In total, 78 patients who received 104 dental implants with vGBR, categorized as (1) pre-GBR and post-implantation and (2) simultaneous GBR and implantation, were enrolled. Data analysis was based on periapical radiographs, clinical photos, and dental records. The 2-sample t-test was used to compare the 2 surgical procedures. Results: The baseline vertical bone level, augmented bone height (ABH), and treatment duration were significantly higher in the pre-GBR procedure group. The survival rates of the implants were 96.1% and 94.8% in implant- and patient-based analyses, respectively. In Cox regression analysis, high rates of implant failure were found in the presence of ABH of ≥4 mm, smoking, and diabetes. Conclusions: Within the limitations of this retrospective study, the partial split-flap technique using a K-incision for vGBR showed stable clinical outcomes and favorable dental implant survival.