• Maxillofacial Plastic and Reconstructive Surgery
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• 제37권
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• pp.44.1-44.6
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• 2015

Background: The present study introduces the design and fabrication of a simple surgical guide with which to perform genioplasty. Methods: A three-dimensional reconstruction of the patient's cranio-maxilla region was built, with a dentofacial skeletal model, then derived from CT DICOM data. A surgical simulation was performed on the maxilla and mandible, using three-dimensional cephalometry. We then simulated a full genioplasty, in silico, using the three-dimensional (3D) model of the mandible, according to the final surgical treatment plan. The simulation allowed us to design a surgical guide for genioplasty, which was then computer-rendered and 3D-printed. The manufactured surgical device was ultimately used in an actual genioplasty to guide the osteotomy and to move the cut bone segment to the intended location. Results: We successfully performed the osteotomy, as planned during a genioplasty, using the computer-aided design and computer-aided manufacturing (CAD/CAM) surgical guide that we initially designed and tested using simulated surgery. Conclusions: The surgical guide that we developed proved to be a simple and practical tool with which to assist the surgeon in accurately cutting and removing bone segments, during a genioplasty surgery, as preoperatively planned during 3D surgical simulations.

• 대한심미치과학회지
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• 제32권2호
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• pp.54-68
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• 2023

디지털 방법을 사용한 무치악의 임플란트 치료계획은 surgical guide design으로 구체화된다. Surgical guide를 제작할 때, 우리는 먼저 최종 보철의 형태를 가상공간에 구현한 후 이를 바탕으로 식립 계획을 구체화하게 된다. 그러나 완전무치악 환자는 치아배열의 기준이 없고 악간관계가 정립되어 있지 않아 최종 보철의 형태를 짐작하기 어려워 surgical guide를 만드는 데 어려움이 있다. 이때 기존의 만족스러운 총의치나 부분의치, 잔존치 등이 존재한다면 그 치아배열이 가상적인 최종 보철의 reference가 될 수 있다. 만약 이러한 reference가 부재하거나 만족스럽지 못하다면, 진단용 목적으로 총의치를 제작하되 이를 구내에서 검증하는 과정이 필요하다. 이러한 과정을 통해 surgical guide를 제작할지라도 구내 상황에 따라 implant의 위치가 계획한 것과 다르게 식립될 수 있으며, 만약 guide의 positioning이 잘못된다면 그 오차는 모든 implant의 위치를 변위시킬 수 있으므로 guide 수술이 오히려 재앙으로 다가올 수 있다. 본 기고에서는 치아 배열의 reference가 될 수 있는 자료들을 적절한 시기에 채득하여 이를 디지털 공간에 이전 및 통일된 좌표계로 정렬하는 방법에 대해 논의하고, 또한 이렇게 수립된 식립계획을 현실의 구강에 적은 오차로 이전 및 정렬하는 방법에 대해 소개하여 일관적이고 체계적인 무치악 가이드 디자인의 프로토콜 정립에 대해 의견 개진하려 한다.

• 대한치위생과학회지
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• 제5권2호
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• pp.53-60
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• 2022

Background: This study was aimed at improving the satisfaction of patients with implants placed using an implant surgical guide by analyzing patient satisfaction with the implant procedure carried out using the guide . Methods: We extracted convenient samples from patients with implants who had visited dental hospitals and clinics in Mokpo from March 2 to June 30, 2022. We used 228 copies of the self-report survey for analyses. Results: All items of implant satisfaction were positively correlated with the use of an implant surgical guide. Conclusions:The results of this study showed that implant satisfaction can be increased with the use of implant surgical guides.

• The Journal of Advanced Prosthodontics
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• 제15권5호
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• pp.259-270
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• 2023

PURPOSE. This study evaluated the reliability of the chair-side CAD-CAM surgical guide (CSG) in the anterior maxilla by comparing its accuracy with the laboratory 3D-printed surgical guide (3DSG) and manual surgical guide (MSG) concerning different levels of dentists' surgical experience. MATERIALS AND METHODS. Ten surgical guides of each type (MSG, 3DSG, and CSG) were fabricated on a control study model with missing right and left central incisors. Sixty implants were placed in 30 study models by two dentists (one inexperienced and one experienced) using three different types of surgical guides. Horizontal deviations at shoulder and at apex, vertical, and angular deviations were measured after superimposing the planned and placed implant positions in the software. Kruskal-Wallis and Mann-Whitney U tests were used to compare the accuracy of three types of surgical guides in each dentist group and the accuracy of each surgical guide between two dentists (α = .05). RESULTS. There were no significant differences in any deviations between CSG and 3DSG, apart from angular deviation, for both dentists' groups. Moreover, both CSG and 3DSG showed no significant differences in accuracy between the two dentists (P > .05). In contrast, MSG demonstrated significant differences from CSG and 3DSG and a significant difference in accuracy between the two dentists (P < .05). CONCLUSION. CSG provides superior accuracy to MSG in implant placement in the maxillary anterior region and is comparable to 3DSG at different levels of surgical experience, while offering the benefits of shorter manufacturing time and reduced patient visits.

• 한국치위생학회지
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• 제22권4호
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• pp.281-287
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• 2022

Objectives: This study, investigated the satisfaction of patients who received the procedure using an implant guide to identify factors affecting satisfaction in dental hospitals and clinics in Jeollanam-do. Methods: From December 2021 to February 2022, questionnaires randomly were collected from 128 patients aged 20 to 90 years visiting dental hospitals and clinics using surgical guides in some areas of Jeollanam-do. Results: There was a negative correlation between the overall satisfaction average and Visual Analog Scale (VAS) pain level (r=-0.414, p<0.001), and a negative correlation between VAS pain level and VAS satisfaction (r=-0.273, p<0.05), As subjective pain decreased, subjective satisfaction increased, and as subjective pain increased, the overall satisfaction average also decreased, showing an inverse correlation. Factors affecting satisfaction with the guide for implant surgery were whether you would like to recommend it to people around you (β=0.556), whether you would like to explain the guide (β=0.194), and whether you thought it was good to receive the guide (β=0.199). Conclusions: Therefore, in order to increase the satisfaction of the implant surgical guide procedure, it is considered important to perform a sufficient explanation of the implant surgical guide before the procedure.

• 구강회복응용과학지
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• 제31권3호
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• pp.178-185
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• 2015

목적: 본 연구에서는 Simplant와 R2GATE 두 가지 수술용 가이드 시스템의 인터페이스(interface)에 대한 만족도, 제작된 수술용 가이드의 디자인과 편의성, 수술용 가이드 활용 시 중요도에 대한 만족도를 설문조사하여 비교평가 하고자 하였다. 연구 재료 및 방법: 두 가지 시스템으로 제작된 수술용 가이드(surgical guide)를 치아모형에 각각 장착한 상태에서 임플란트 수술 과정을 모의하였다. 모의 수술이 끝난 뒤 연구대상에게 만족도에 관한 설문지를 작성하도록 하였다. 작성된 설문지를 회수하여 각 문항에 대한 데이터를 정리하고 통계 프로그램 SPSS 20.0 (IBM)를 이용하여 분석하였다. 결과: 전체적인 만족도는 R2GATE 군($7.33{\pm}1.26$)이 SimPlant 군($6.67{\pm}1.26$)보다 더 높은 것으로 나타났다(${\alpha}$ = 0.05). 결론: R2GATE 시스템으로 제작된 수술용 가이드는 임상에 널리 사용 할 만 한 사용자의 만족도를 나타내었다. 또한, R2GATE 시스템으로 제작된 수술용 가이드는 drill의 길이와 방향을 동시에 guide할 수 있어 임플란트 식립 경험이 부족한 초심자에게 적극 추천된다.

• 한국컴퓨터정보학회논문지
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• 제22권12호
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• pp.125-130
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• 2017

Screw insertion surgery is frequently required among surgical procedures. Especially, very careful attention should be paid to the insertion of screw in the operation of the cervical vertebra. Therefore, there is a need for a guide that allows the surgeon to reliably and promptly perform treatment by calculating the desired insertion angle and length for screw insertion. In this study, the center and direction of the pedicle were calculated through 3D modeling and 3D vector numerical analysis using the CT or MRI image of the patient for the safe operation of the guide, and based on this, After that, we will implement surgical guide based on this.

• 로봇학회논문지
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• 제17권1호
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• pp.8-15
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• 2022

In this paper, we proposed the method of virtual reality-based surgical navigation to reproduce the pre-planned position and angle of the pedicle screw in spinal fusion surgery. The goal of the proposed method is to quantitatively save the surgical plan by applying a virtual guide coordinate system and reproduce it in the surgical process through virtual reality. In the surgical planning step, the insertion position and angle of the pedicle screw are planned and stored based on the virtual guide coordinate system. To implement the virtual reality-based surgical navigation, a vision tracking system is applied to set the patient coordinate system and paired point-based patient-to-image registration is performed. In the surgical navigation step, the surgical plan is reproduced by quantitatively visualizing the pre-planned insertion position and angle of the pedicle screw using a virtual guide coordinate system. We conducted phantom experiment to verify the error between the surgical plan and the surgical navigation, the experimental result showed that target registration error was average 1.47 ± 0.64 mm when using the proposed method. We believe that our method can be used to accurately reproduce a pre-established surgical plan in spinal fusion surgery.

• 대한치과보철학회지
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• 제52권4호
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• pp.366-375
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• 2014

임플란트 식립 시 수술 가이드는 치료계획 수립 및 진단 뿐 아니라 식립 위치 및 각도를 조절하는데 도움을 준다. 수술 가이드는 식립 위치만 보여 주는 디자인(Nonlimiting design), 식립 위치와 각도를 보여주는 디자인(Partially limiting design), 식립 위치와 각도 및 깊이까지 보여주는 디자인(Completely limiting design)으로 나뉜다. 식립 위치와 각도를 보여주는 디자인은 제작이 비교적 간단하고 비용이 적게 드는 반면 식립 위치와 각도 및 깊이까지 보여주는 디자인보다 수술 정확성이 떨어진다는 단점을 가진다. 식립 위치와 각도 및 깊이까지 보여주는 디자인은 해부학적으로 정확하고 보철적, 생역학적 관점에서 최적화 된 치료를 할 수 있으며 심미적, 기능적으로 술 후 불편감을 최소화 해줄 수 있다. 본 논문에서는 다양한 수술 가이드에 대하여 문헌을 통해 고찰해보고 이를 임상에 적용한 증례를 살펴보고자 한다.

• Journal of Periodontal and Implant Science
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• 제52권5호
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• pp.411-421
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• 2022

Purpose: In this study, we aimed to evaluate the degree of heat generation when a novel drill design with an irrigation slot was used with metal sleeve-free (MF) and metal sleeve-incorporated (MI) surgical guides in an environment similar to that of the actual oral cavity. Methods: A typodont with a missing mandibular right first molar and 21 bovine rib blocks were used. Three-dimensional-printed MF and MI surgical guides, designed for the placement of internal tapered implant fixtures, were used with slot and non-slot drills. The following groups were compared: group 1, MI surgical guide with slot drill; group 2, MI surgical guide with a non-slot drill; and group 3, MF surgical guide with a slot drill. A constant-temperature water bath at 36℃ was used. The drilling was performed in 6 stages, and the initial, highest, and lowest temperatures of the cortical bone were measured at each stage using a non-contact infrared thermometer. Results: There were no temperature increases above the initial temperature in any drilling procedure. The only significant difference between the non-slot and slot groups was observed with the use of the first drill in the MI group, with a higher temperature in the non-slot group (P=0.012). When the heat generation during the first and the second drilling was compared in the non-slot group, the heat generation during the first drilling was significantly higher (P<0.001), and there was no significant difference in heat generation between the drills in the slot group. Conclusions: Within the limitations of this study, implant-site preparation with the surgical guide showed no critical increase in the temperature of the cortical bone, regardless of whether there was a slot in the drill. In particular, the slotted drill had a cooling effect during the initial drilling.