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Article
Publication date: 14 January 2014

Yunfeng Liu, Wenqing Liao, Guangsheng Jin, Quanming Yang and Wei Peng

– The purpose is to realize precise apicoectomy with less surgical risk and improved quality and efficiency.

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Abstract

Purpose

The purpose is to realize precise apicoectomy with less surgical risk and improved quality and efficiency.

Design/methodology/approach

First, the procedure of precise apicoectomy based on additive manufacturing (AM) and digital design is proposed. With CT images of the patient's oral, a 3D model of alveolar bone and teeth is reconstructed, and based on this model, the infected tissue and enclosed root tip can be determined. Thus, a surgical plan can be created based on clear anatomical relationships and minimal negative constraints, which will then determine the drill position, direction and depth, as well as the resection length of root tip. With this plan, a surgical guide design is performed via a composite model from reversed plaster models and hard tissue models from CT, and accessory tools including drill with stop plane and handle are also selected. With the surgical guide, the virtual plan in the computer can be realized in the clinic.

Findings

With this methodology, the dentist can perform root-end resection with greater accuracy, save more than 30 percent of operatory time, and the discomfort to the patient is reduced to a minimum.

Practical implications

The proposed methodology has been used in ten cases for root-end resections. In fact, this method of designing a computer-based treatment plan with a 3D model of a patient and applying it in the clinic through guiding tools can be used in other surgeries, such as orthognathic surgery or osteotomy.

Originality/value

This case report illustrates that with AM and digital design methods, optimal operational plans can be designed and realized for apicoectomy, and the quality and efficiency of clinical surgery are greatly improved compared with conventional methods.

Details

Rapid Prototyping Journal, vol. 20 no. 1
Type: Research Article
ISSN: 1355-2546

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Article
Publication date: 1 January 1998

Gong Yitai

The Library System of China and the Information System of China are the two systems of information organisations in China. This paper discusses the types of information agencies…

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Abstract

The Library System of China and the Information System of China are the two systems of information organisations in China. This paper discusses the types of information agencies in each, focusing on structural characteristics, and governing regulations and especially on programmes and activities. Included in the discussion are such topics as publications, cooperative undertakings, new services and evaluation procedures.

Details

Asian Libraries, vol. 7 no. 1
Type: Research Article
ISSN: 1017-6748

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