MINISTRY OF EDUCATION
AND TRAINING
MINISTRY OF
HEALTH
HANOI MEDICAL UNIVERSITY
PHAM THI HANH QUYEN
ASSESSMENT OF ROOT CANAL TREATMENT
PERFORMED ON ELDERLY PATIENT’S
PREMOLAR USING PROTAPER NEXT
SYSTEM – AN EXPERIMENTAL RESEARCH
AND A CLINICAL TRIAL
Specialty : Odontostomatology
Number : 62720601
SUMMARY OF THE Ph. D. THESIS
HANOI - 2020
THIS RESEARCH WAS PERFORMED AT
HANOI MEDICAL UNIVERSITY
Supervisors:
1. Assoc. Prof. Đ Quang Trungỗ
2. Assoc. Prof. Tr nh Th Thái Hàị ị
Reviewer 1:
Reviewer 2:
Reviewer 3:
Thesis will be defended in front of the University Thesis Evaluation
Council
Organized in Hanoi Medical University
At , on , 2020
This thesis can be found at:
1. Vietnam National Library
2. Library of Hanoi Medical University
PULISHED RESEARCH THAT ARE RELEVANT TO
CONTENT OF THIS THESIS
1. Pham Thi Hanh Quyen, Trinh Thi Thai Ha, Le Long Nghia.
Effectiveness of PTN system in shaping upper premolars’ root
canal – A experimental research. Journal of Practical Medicine,
No 8/2016 (1019), 44-48.
2. Pham Thi Hanh Quyen, Trinh Thi Thai Ha, Le Long Nghia.
Research of first upper premolar’s anatomy in elderly patient
with support of Cone Beam Computed Tomography. Journal of
Practical Medicine, No 3/2017 (1037), 199-201.
3. Pham Thi Hanh Quyen, Trinh Thi Thai Ha. Assessment of
clinical character of root canal treatment performed on upper
premolar’s calcified canal in elderly patients. Journal of
Practical Medicine, No 3/2019 (1092), 3-6.
A. INTRODUCTION
RATIONALE OF THIS THESIS
Recently, elderly population has grown rapidly, ratio between working-
age adults and older adults decreased significantly. Time for Vietnam to
change from aging period into old population is much shorter than developed
countries. Thus, demand for taking care of older adults’ oral health escalate
during several recent years. However, in the elderly, oral structure have much
degenerations and changes in morphology and function over time; therefore,
several pathological problems might appear more frequently, with different
clinical and non-clinical manifestation. Thus, treatment for them is also
different from the younger patient. Premolars are transitional teeth with high
prevalence of curved root canal, especially double S-shaped canal, and also the
teeth that most frequently have morphology variation of the root canal system.
Thanks to asymmetric rotary motion, ProTaper Next has flexibility and
effective dentin-cutting ability suitable for root canal treatment on elderly
patients with biological or pathological calcified canal. In Vietnam, although
there are many researches about effectiveness of NiTi rotary file but none of
them evaluates effectiveness of ProTaper Next when shaping multi-curved and
calcified root canal in the elderly. Derived from those problems, we did the
research “Assessment of root canal treatment outcomes performed on elderly
patient’s premolar using ProTaper Next system – An experimental research
and a clinical trial”, aiming to 2 goals:
1. Evaluating shaping result of ProTaper Next and ProTaper Universal
system when performed on upper premolars’ root canal of the elderly.
2. Describing clinical and radiographic characters and evaluating root canal
treatment outcomes performed on elderly patient’s premolar using
ProTaper Next system.
URGENCY OF THE TOPIC
Besides the aging process, diseases and affection of many factors lead to
huge changes in anatomical structure, histology, biology and pathology of the
dental pulp. WHO aims to the goal of keeping 20 or more natural teeth at the
age of 80 in order to raise life quality of the elderly, whereas providing good
treatment for pulpal diseases of the elderly is a highly tough and complicate
work in contemporary dentistry. Therefore, executing a research to clarify
these points is the scientific basis to seek the most appropriate treatment for
pulpal diseases of the elderly. It provides the scientific basis and clinical
evidence for practicing as well as educating dentistry.
PRACTICAL MEANING AND NEW CONTRIBUTION
The experimental research compares shaping ability of ProTaper Next
with the well-known ProTaper Universal on 72 extracted upper premolars of
