Novel Approaches to Functional Occlusal Surfaces through Computer-Aided Design

2009 Fiscal Year Final Research Report

• Project/Area Number: 19390502
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: 補綴理工系歯学
• Research Institution: Tsurumi University
• Principal Investigator: FUKUSHIMA Shunji Tsurumi University, 歯学部, 教授 (60014205)
• Co-Investigator(Kenkyū-buntansha): OGAWA Takumi 鶴見大学, 歯学部, 助教 (20267537) ; SHIGETA Yuko 鶴見大学, 歯学部, 助教 (40367298)
• Project Period (FY): 2007 – 2009
• Keywords: 冠橋義歯学 / 4次元下顎運動 / 3次元造形 / 顎機能 / CAD / CAM

Research Abstract

The purpose of this present study was to provide a virtual articulator, and to design a functional occlusal surface via a virtual articulator in VR space, with added insight provided by a haptic device.
Our CAD/CAM system procedures composed of the 4 following steps : Step 1 : A virtual dentition model (VDM) was reconstructed through laser surface scanning data of dental casts, scanned with a 3D scanner via 3D mesh modeling software. Step2 : Scanned VDMs have an independent coordinate value. The relative position between upper and lower VDMs was decided via labial-buccal surface data from upper and lower casts placed at the intercuspal position. Step3 : The Virtual Reality crown (VR crown) was designed via Freeform and Phantom Omni. VDM data from functional occlusal surface was removed from crown data, and occlusal contact points were set and masked. The occlusal surface was shaped without modifying the occlusal contact. Abatement teeth data was removed from crown data. Step4 : The dental crown wax pattern was modeled from VR crown data via 3D printer. Occlusal contacts were assessed at the whole dentition, with/without CAD/CAM crown via an articulator, using silicone. The vertical gap between the finish line on the abutment teeth and the margin on the dental crown was 28±5μm in the conventional crown, 35±13μm in the CAD/CAM crown. The real crown's occlusal contacts almost corresponded with its VR crown. Conclusion : We developed a novel CAD/CAM system which can design functional occlusal surfaces via a modified FGP technique. The marginal fit in our CAD/CAM crown was sufficient for clinical application.

Research Products

• [Journal Article] Evaluation of the simulation robot for mandibular movements with the patient-specific 3-dimensional plaster model and mandibular movement data-Clinical application of the physical simulation robot- (2008)
  • Author(s): Tomoko IKAWA, Takumi OGAWA, Yuko SHIGETA, Rio HIRABAYASHI, Shunji FUKUSHIMA, Yoshito OTAKE, Asaki HATTORI, Naoki SUZUKI
  • Journal Title: Stud Health Technol Inform 132 Pages: 183-188
  • Peer Reviewed
• [Journal Article] Kinematic Analysis of Limitation of Mouth Opening of TMD by Rotation and Translation of Condyle (2007)
  • Author(s): Eriko Ando, Yuko Shigeta, Takumi Ogawa, Tomoko Ikawa, Rio Hirabayashi, Shinya Hirai, Shunji Fukushima
  • Journal Title: Dentistry in Japan 43 Pages: 53-60
  • Peer Reviewed
• [Presentation] .歯科における医用画像工学技術の発展と応用 (2009)
  • Author(s): 重田優子
  • Organizer: 第22回一般社団法人日本顎関節学会総会・学術大会
  • Place of Presentation: タワーホール船堀
  • Year and Date: 2009-07-25
• [Presentation] VR(Virtual Reality)咬合器における上下顎咬合接触再現性の検討 (2009)
  • Author(s): 笠間慎太郎, 井川知子, 小川匠, 河村昇, 伊原啓祐, 重田優子, 平林里大, 平井真也, 岩並恵一, 積田光由, 小久保裕司, 水野行博, 福島俊士
  • Organizer: 第69回鶴見大学歯学会
  • Place of Presentation: 鶴見大学会館
  • Year and Date: 2009-07-18
• [Presentation] 冠・橋義歯CAD/CAM systemの開発 (2008)
  • Author(s): 河村昇, 伊原啓祐, 水野行博, 小川匠, 重田優子, 井川知子, 平林里大, 平井真也, 岩並恵一, 積田光由, 笠間慎太郎, 福島俊士
  • Organizer: 第68回鶴見大学歯学会
  • Place of Presentation: 鶴見大学会館
  • Year and Date: 2008-12-20
• [Presentation] 医用画像工学の歯科領域の応用について (2008)
  • Author(s): 小川匠, 重田優子, 井川知子, 安藤栄里子, 平井里大, 平井真也, 笠間慎太郎, 三島章, 小林馨, 福島俊士
  • Organizer: 第68回鶴見大学歯学会
  • Place of Presentation: 鶴見大学会館
  • Year and Date: 2008-12-20
• [Presentation] CT3D像に歯列モデル形状を統合した高精度な3次元頭蓋モデルにおける咬合接触の再現性の検討 (2008)
  • Author(s): 井川知子, 小川匠, 重田優子, 笠間慎太郎, 福島俊士, 服部麻木
  • Organizer: 第17回日本コンピュータ外科学会
  • Place of Presentation: 東京女子医科大学弥生記念講堂
  • Year and Date: 2008-10-31
• [Presentation] 顎口腔機能異常に対する4次元下顎運動解析システムの臨床応用の現状 (2008)
  • Author(s): 小川匠, 井川知子, 重田優子, 笠間慎太郎, 福島俊士, 濱田良樹, 瀬戸皖一, 服部麻木, 鈴木直樹
  • Organizer: 第17回日本コンピュータ外科学会
  • Place of Presentation: 東京女子医科大学, 弥生記念講堂
  • Year and Date: 2008-10-31
• [Presentation] Evaluation of the simulation robot for mandibular movements with the patient-specific 3-dimensional plaster model and mandibular movement data-Clinical application of the physical simulation robot- (2008)
  • Author(s): Tomoko Ikawa, Takumi Ogawa, Yuko Shigeta, Rio Hirabayashi, Shunji Fukushima, Yoshito Otake, Asaki Hattori, Naoki Suzuki
  • Organizer: The 16th Annual Medicine Meets Virtual Reality Conference
  • Place of Presentation: The Hyatt Regency Long Beach, Long Beach, CA
  • Year and Date: 2008-01-30
• [Presentation] Using the Digital Gothic Arch Tracer for Occlusal Diagnosis and Management of Malocclusion with Osteoarthritis (2007)
  • Author(s): Ogawa Takumi, Ikawa Tomoko, Shigeta Yuko, Ando Eriko, Hirabayashi Rio, Hirai Shinya, Hosoda Yutaka, Kamei Shu, Araki Jiro, Ito Kousuke, Fukushima Shunji
  • Organizer: 2nd Joint Meeting of the Japan Prosthodontic Society and the Greater New York Academy of Prosthodontics
  • Place of Presentation: 東京TFTホール(東京ビッグサイト)
  • Year and Date: 2007-10-20
• [Presentation] バーチャルリアリティーと実体モデルを用いた顎矯正手術(Two-Way Simulation System)の開発 (2007)
  • Author(s): 小川匠, 濱田良樹, 重田優子, 井川知子, 福島俊士, 園山智生, 斉藤知之, 中岡一敏, 中島敏文, 鈴木麻美, 瀬戸〓一, 大竹義人, 服部麻木, 鈴木直樹
  • Organizer: 第17回顎変形症学会
  • Place of Presentation: 朱鷺メッセ新潟コンベンションセンター
  • Year and Date: 2007-06-21
• [Presentation] 手術シミュレーションおよび実体モデルを用いた顎矯正手術支援システムの開発 (2007)
  • Author(s): 小川匠, 濱田良樹, 重田優子, 井川知子, 福島俊士, 園山智生, 斉藤知之, 中岡一敏, 中島敏文, 鈴木麻美, 瀬戸〓一, 大竹義人, 服部麻木, 鈴木直樹
  • Organizer: 第17回顎変形症学会
  • Place of Presentation: 朱鷺メッセ新潟コンベンションセンター
  • Year and Date: 2007-06-21
• [Presentation] 術前シミュレーションに応用する石膏実体モデルの硬化処理について (2007)
  • Author(s): 井川知子, 小川匠, 平林里大, 重田優子, 福島俊士, 永田勝久, 福田誠, 山田真穂, 大竹義人, 服部麻木, 鈴木直樹
  • Organizer: 第46回日本生体医工学会大会(旧日本エム・イー学会)
  • Place of Presentation: 仙台国際センター
  • Year and Date: 2007-04-26
• [Presentation] Improvement of Plaster Models made with a 3D Printer for Craniofacial Surgery (2007)
  • Author(s): Tomoko Ikawa, Takumi Ogawa, Rio Hirabayashi, Yuko Shigeta, Shunji Fukushima, Katsuhisa Nagata, Makoto Fukuda, Maho Yamada, Yoshito Otake, Asaki Hattori, Naoki Suzuki
  • Organizer: 85th General Session & Exhibition of the International Association for Dental Research
  • Place of Presentation: New Orleans, Louisiana, USA
  • Year and Date: 2007-03-23
• [Presentation] Developments of a Craniofacial Surgical Simulation System with Jaw Deformitie (2007)
  • Author(s): Takumi Ogawa, Yuko Shigeta, Tomoko Ikawa, Rio Hirabayashi, Shunji Fukushima, Yoshito Otake, Asaki Hattori, Naoki Suzuki, Yoshiki Hamada, Kanichi Seto
  • Organizer: 85th General Session & Exhibition of the International Association for Dental Research
  • Place of Presentation: New Orleans, Louisiana, USA
  • Year and Date: 2007-03-23