Outline

Academic unit	Discipline of Restorative and Reconstructive Dentistry
Credit points	6
Prerequisites ?	DENT5401 and DENT5412
Corequisites ?	DENT5413 and DENT5414
Prohibitions ?	None
Assumed knowledge ?	Comprehensive knowledge in all aspects of General Dentistry, particularly in Restorative Dentistry and Oral Rehabilitation. Clinical skills and theoretical knowledge taught in year 1&2 (DENT5401-DENT5406 & DENT5407-DENT5412).
Available to study abroad and exchange students	No

Coordinator	Axel Spahr, axel.spahr@sydney.edu.au

Type	Description	Weight	Due	Length
Assignment	Literature review (formative) Thesis	50%	-	To be added by the unit coordinator
Outcomes assessed:
Final exam (Record+)	Formative exam Written examination	50%	Formal exam period	3 hours
Outcomes assessed:
= Type B final exam ?

Result name	Mark range	Description
High distinction	85 - 100
Distinction	75 - 84
Credit	65 - 74
Pass	50 - 64
Fail	0 - 49	When you don’t meet the learning outcomes of the unit to a satisfactory standard.

WK	Topic	Learning activity	Learning outcomes
Weekly	Advanced and complex non-surgical and surgical periodontal therapy; use of all types of mechanical and chemical approaches to control the biofilm or periodontal infection, management of a customised supportive periodontal therapy, re-evaluation of previous treatment or treatment plans, impact of various systemic modifying factors on periodontal tissues and therapy, interdisciplinary treatment with orthodontics. Advanced/complex mucogingival/plastic periodontal therapy	Seminar (1 hr)
Advanced and complex non-surgical and surgical periodontal therapy; use of all types of mechanical and chemical approaches to control the biofilm or periodontal infection, management of a customised supportive periodontal therapy, re-evaluation of previous treatment or treatment plans, impact of various systemic modifying factors on periodontal tissues and therapy, interdisciplinary treatment with orthodontics. Advanced/complex mucogingival/plastic periodontal therapy	Individual study (2 hr)

Learning outcomes are what students know, understand and are able to do on completion of a unit of study. They are aligned with the University's graduate qualities and are assessed as part of the curriculum.

At the completion of this unit, you should be able to:

LO1. identify, evaluate and describe the anatomy, physiology and histology of mucogingival tissues
LO2. identify, evaluate and describe the aetiology and pathogenesis of gingival recessions
LO3. identify, evaluate and describe the classification of gingival recessions
LO4. identify, evaluate, describe and understand the interactions/interface between periodontics and orthodontics
LO5. identify, evaluate and describe the influence of orthodontic forces/treatment on periodontal tissues and related structures
LO6. identify, evaluate and describe the techniques and material/devices of Piezocision, including indication, advantages/disadvantages and prognosis
LO7. describe, evaluate and demonstrate the different techniques for recession coverage and their prognoses
LO8. describe, evaluate and demonstrate the different techniques for soft tissue augmentation/management around implants and their prognoses.

Graduate qualities

The graduate qualities are the qualities and skills that all University of Sydney graduates must demonstrate on successful completion of an award course. As a future Sydney graduate, the set of qualities have been designed to equip you for the contemporary world.

GQ1	Depth of disciplinary expertise Deep disciplinary expertise is the ability to integrate and rigorously apply knowledge, understanding and skills of a recognised discipline defined by scholarly activity, as well as familiarity with evolving practice of the discipline.
GQ2	Critical thinking and problem solving Critical thinking and problem solving are the questioning of ideas, evidence and assumptions in order to propose and evaluate hypotheses or alternative arguments before formulating a conclusion or a solution to an identified problem.
GQ3	Oral and written communication Effective communication, in both oral and written form, is the clear exchange of meaning in a manner that is appropriate to audience and context.
GQ4	Information and digital literacy Information and digital literacy is the ability to locate, interpret, evaluate, manage, adapt, integrate, create and convey information using appropriate resources, tools and strategies.
GQ5	Inventiveness Generating novel ideas and solutions.
GQ6	Cultural competence Cultural Competence is the ability to actively, ethically, respectfully, and successfully engage across and between cultures. In the Australian context, this includes and celebrates Aboriginal and Torres Strait Islander cultures, knowledge systems, and a mature understanding of contemporary issues.
GQ7	Interdisciplinary effectiveness Interdisciplinary effectiveness is the integration and synthesis of multiple viewpoints and practices, working effectively across disciplinary boundaries.
GQ8	Integrated professional, ethical, and personal identity An integrated professional, ethical and personal identity is understanding the interaction between one’s personal and professional selves in an ethical context.
GQ9	Influence Engaging others in a process, idea or vision.

Outcome map

Learning outcomes	Graduate qualities
Learning outcomes

Alignment with Competency standards

Outcomes	Competency standards
	Periodontics - 1.a. recognising the personal limitations and scope of the specialty and knowing when to refer or seek advice appropriately 1.b. practising with personal and professional integrity, honesty and trustworthiness 1.c. providing patient-centred care, including selecting and prioritising treatment options that are compassionate and respectful of patients’ best interests, dignity and choices and which seek to improve community oral health 1.d. understanding and applying the moral, cultural, ethical principles and legal responsibilities involved in the provision of specialist dental care to individual patients, to communities and populations 1.e. displaying appropriate professional behaviour and communication towards all members of the dental team and referring health practitioner/s 1.f. understanding and applying legislation including that related to record-keeping 1.g. demonstrating specialist professional growth and development through research and learning 1.h. supporting the professional development and education for all members of the dental and/or health community, and 1.i. demonstrating leadership in the profession. 2.a. identifying and understanding a patient’s, or their parent’s, guardian’s or carer’s expectations, desires and attitudes when planning and delivering specialist treatment 2.b. communicating effectively with patients, their families, relatives and carers in a manner that takes into account factors such as their age, intellectual development, social and cultural background 2.c. use of technological and telecommunication aids in planning and delivering specialist treatment 2.d. communicating effectively in all forms of health and legal reporting, and 2.e. interpreting and communicating knowledge, skills and ideas. 3.a. critically evaluating scientific research and literature, products and techniques to inform evidence-based specialist practice, and 3.b. synthesising complex information, problems, concepts and theories. 4.1.a. historical and contemporary literature 4.1.b. the scientific basis of dentistry including the relevant biological, medical and psychosocial sciences 4.1.c. development, anatomy, physiology and pathology of hard and soft tissues of the head and neck 4.1.d. the range of investigative, technical and clinical procedures, and 4.1.e. management and treatment planning with multidisciplinary engagement for complex cases, including compromised patients. 4.2.a. biology of wound healing in relation to periodontal and bone defect repair and regeneration 4.2.b. pathogenesis, diagnosis and management of periodontal diseases and conditions 4.2.c. management of periodontal, mucogingival and implant surgery, and 4.2.d. the principles and application of pharmacology. 5.1.a. applying decision-making, clinical reasoning and judgement to develop a comprehensive diagnosis and treatment plan by interpreting and correlating findings from the history, clinical examinations, imaging and other diagnostic tests 5.1.b. managing complex cases, including compromised patients with multidisciplinary management, and 5.1.c. managing complications. 5.2.a. diagnosing periodontal disease and conditions, including peri-implant disease, and 5.2.b. managing soft and hard tissues including implant placement.
	Periodontics - 1.a. recognising the personal limitations and scope of the specialty and knowing when to refer or seek advice appropriately 1.b. practising with personal and professional integrity, honesty and trustworthiness 1.c. providing patient-centred care, including selecting and prioritising treatment options that are compassionate and respectful of patients’ best interests, dignity and choices and which seek to improve community oral health 1.d. understanding and applying the moral, cultural, ethical principles and legal responsibilities involved in the provision of specialist dental care to individual patients, to communities and populations 1.e. displaying appropriate professional behaviour and communication towards all members of the dental team and referring health practitioner/s 1.f. understanding and applying legislation including that related to record-keeping 1.g. demonstrating specialist professional growth and development through research and learning 1.h. supporting the professional development and education for all members of the dental and/or health community, and 1.i. demonstrating leadership in the profession. 2.a. identifying and understanding a patient’s, or their parent’s, guardian’s or carer’s expectations, desires and attitudes when planning and delivering specialist treatment 2.b. communicating effectively with patients, their families, relatives and carers in a manner that takes into account factors such as their age, intellectual development, social and cultural background 2.c. use of technological and telecommunication aids in planning and delivering specialist treatment 2.d. communicating effectively in all forms of health and legal reporting, and 2.e. interpreting and communicating knowledge, skills and ideas. 3.a. critically evaluating scientific research and literature, products and techniques to inform evidence-based specialist practice, and 3.b. synthesising complex information, problems, concepts and theories. 4.1.a. historical and contemporary literature 4.1.b. the scientific basis of dentistry including the relevant biological, medical and psychosocial sciences 4.1.c. development, anatomy, physiology and pathology of hard and soft tissues of the head and neck 4.1.d. the range of investigative, technical and clinical procedures, and 4.1.e. management and treatment planning with multidisciplinary engagement for complex cases, including compromised patients. 4.2.a. biology of wound healing in relation to periodontal and bone defect repair and regeneration 4.2.b. pathogenesis, diagnosis and management of periodontal diseases and conditions 4.2.c. management of periodontal, mucogingival and implant surgery, and 4.2.d. the principles and application of pharmacology. 5.1.a. applying decision-making, clinical reasoning and judgement to develop a comprehensive diagnosis and treatment plan by interpreting and correlating findings from the history, clinical examinations, imaging and other diagnostic tests 5.1.b. managing complex cases, including compromised patients with multidisciplinary management, and 5.1.c. managing complications. 5.2.a. diagnosing periodontal disease and conditions, including peri-implant disease, and 5.2.b. managing soft and hard tissues including implant placement.
	Periodontics - 1.a. recognising the personal limitations and scope of the specialty and knowing when to refer or seek advice appropriately 1.b. practising with personal and professional integrity, honesty and trustworthiness 1.c. providing patient-centred care, including selecting and prioritising treatment options that are compassionate and respectful of patients’ best interests, dignity and choices and which seek to improve community oral health 1.d. understanding and applying the moral, cultural, ethical principles and legal responsibilities involved in the provision of specialist dental care to individual patients, to communities and populations 1.e. displaying appropriate professional behaviour and communication towards all members of the dental team and referring health practitioner/s 1.f. understanding and applying legislation including that related to record-keeping 1.g. demonstrating specialist professional growth and development through research and learning 1.h. supporting the professional development and education for all members of the dental and/or health community, and 1.i. demonstrating leadership in the profession. 2.a. identifying and understanding a patient’s, or their parent’s, guardian’s or carer’s expectations, desires and attitudes when planning and delivering specialist treatment 2.b. communicating effectively with patients, their families, relatives and carers in a manner that takes into account factors such as their age, intellectual development, social and cultural background 2.c. use of technological and telecommunication aids in planning and delivering specialist treatment 2.d. communicating effectively in all forms of health and legal reporting, and 2.e. interpreting and communicating knowledge, skills and ideas. 3.a. critically evaluating scientific research and literature, products and techniques to inform evidence-based specialist practice, and 3.b. synthesising complex information, problems, concepts and theories. 4.1.a. historical and contemporary literature 4.1.b. the scientific basis of dentistry including the relevant biological, medical and psychosocial sciences 4.1.c. development, anatomy, physiology and pathology of hard and soft tissues of the head and neck 4.1.d. the range of investigative, technical and clinical procedures, and 4.1.e. management and treatment planning with multidisciplinary engagement for complex cases, including compromised patients. 4.2.a. biology of wound healing in relation to periodontal and bone defect repair and regeneration 4.2.b. pathogenesis, diagnosis and management of periodontal diseases and conditions 4.2.c. management of periodontal, mucogingival and implant surgery, and 4.2.d. the principles and application of pharmacology. 5.1.a. applying decision-making, clinical reasoning and judgement to develop a comprehensive diagnosis and treatment plan by interpreting and correlating findings from the history, clinical examinations, imaging and other diagnostic tests 5.1.b. managing complex cases, including compromised patients with multidisciplinary management, and 5.1.c. managing complications. 5.2.a. diagnosing periodontal disease and conditions, including peri-implant disease, and 5.2.b. managing soft and hard tissues including implant placement.
	Periodontics - 1.a. recognising the personal limitations and scope of the specialty and knowing when to refer or seek advice appropriately 1.b. practising with personal and professional integrity, honesty and trustworthiness 1.c. providing patient-centred care, including selecting and prioritising treatment options that are compassionate and respectful of patients’ best interests, dignity and choices and which seek to improve community oral health 1.d. understanding and applying the moral, cultural, ethical principles and legal responsibilities involved in the provision of specialist dental care to individual patients, to communities and populations 1.e. displaying appropriate professional behaviour and communication towards all members of the dental team and referring health practitioner/s 1.f. understanding and applying legislation including that related to record-keeping 1.g. demonstrating specialist professional growth and development through research and learning 1.h. supporting the professional development and education for all members of the dental and/or health community, and 1.i. demonstrating leadership in the profession. 2.a. identifying and understanding a patient’s, or their parent’s, guardian’s or carer’s expectations, desires and attitudes when planning and delivering specialist treatment 2.b. communicating effectively with patients, their families, relatives and carers in a manner that takes into account factors such as their age, intellectual development, social and cultural background 2.c. use of technological and telecommunication aids in planning and delivering specialist treatment 2.d. communicating effectively in all forms of health and legal reporting, and 2.e. interpreting and communicating knowledge, skills and ideas. 3.a. critically evaluating scientific research and literature, products and techniques to inform evidence-based specialist practice, and 3.b. synthesising complex information, problems, concepts and theories. 4.1.a. historical and contemporary literature 4.1.b. the scientific basis of dentistry including the relevant biological, medical and psychosocial sciences 4.1.c. development, anatomy, physiology and pathology of hard and soft tissues of the head and neck 4.1.d. the range of investigative, technical and clinical procedures, and 4.1.e. management and treatment planning with multidisciplinary engagement for complex cases, including compromised patients. 4.2.a. biology of wound healing in relation to periodontal and bone defect repair and regeneration 4.2.b. pathogenesis, diagnosis and management of periodontal diseases and conditions 4.2.c. management of periodontal, mucogingival and implant surgery, and 4.2.d. the principles and application of pharmacology. 5.1.a. applying decision-making, clinical reasoning and judgement to develop a comprehensive diagnosis and treatment plan by interpreting and correlating findings from the history, clinical examinations, imaging and other diagnostic tests 5.1.b. managing complex cases, including compromised patients with multidisciplinary management, and 5.1.c. managing complications. 5.2.a. diagnosing periodontal disease and conditions, including peri-implant disease, and 5.2.b. managing soft and hard tissues including implant placement.
	Periodontics - 1.a. recognising the personal limitations and scope of the specialty and knowing when to refer or seek advice appropriately 1.b. practising with personal and professional integrity, honesty and trustworthiness 1.c. providing patient-centred care, including selecting and prioritising treatment options that are compassionate and respectful of patients’ best interests, dignity and choices and which seek to improve community oral health 1.d. understanding and applying the moral, cultural, ethical principles and legal responsibilities involved in the provision of specialist dental care to individual patients, to communities and populations 1.e. displaying appropriate professional behaviour and communication towards all members of the dental team and referring health practitioner/s 1.f. understanding and applying legislation including that related to record-keeping 1.g. demonstrating specialist professional growth and development through research and learning 1.h. supporting the professional development and education for all members of the dental and/or health community, and 1.i. demonstrating leadership in the profession. 2.a. identifying and understanding a patient’s, or their parent’s, guardian’s or carer’s expectations, desires and attitudes when planning and delivering specialist treatment 2.b. communicating effectively with patients, their families, relatives and carers in a manner that takes into account factors such as their age, intellectual development, social and cultural background 2.c. use of technological and telecommunication aids in planning and delivering specialist treatment 2.d. communicating effectively in all forms of health and legal reporting, and 2.e. interpreting and communicating knowledge, skills and ideas. 3.a. critically evaluating scientific research and literature, products and techniques to inform evidence-based specialist practice, and 3.b. synthesising complex information, problems, concepts and theories. 4.1.a. historical and contemporary literature 4.1.b. the scientific basis of dentistry including the relevant biological, medical and psychosocial sciences 4.1.c. development, anatomy, physiology and pathology of hard and soft tissues of the head and neck 4.1.d. the range of investigative, technical and clinical procedures, and 4.1.e. management and treatment planning with multidisciplinary engagement for complex cases, including compromised patients. 4.2.a. biology of wound healing in relation to periodontal and bone defect repair and regeneration 4.2.b. pathogenesis, diagnosis and management of periodontal diseases and conditions 4.2.c. management of periodontal, mucogingival and implant surgery, and 4.2.d. the principles and application of pharmacology. 5.1.a. applying decision-making, clinical reasoning and judgement to develop a comprehensive diagnosis and treatment plan by interpreting and correlating findings from the history, clinical examinations, imaging and other diagnostic tests 5.1.b. managing complex cases, including compromised patients with multidisciplinary management, and 5.1.c. managing complications. 5.2.a. diagnosing periodontal disease and conditions, including peri-implant disease, and 5.2.b. managing soft and hard tissues including implant placement.
	Periodontics - 1.a. recognising the personal limitations and scope of the specialty and knowing when to refer or seek advice appropriately 1.b. practising with personal and professional integrity, honesty and trustworthiness 1.c. providing patient-centred care, including selecting and prioritising treatment options that are compassionate and respectful of patients’ best interests, dignity and choices and which seek to improve community oral health 1.d. understanding and applying the moral, cultural, ethical principles and legal responsibilities involved in the provision of specialist dental care to individual patients, to communities and populations 1.e. displaying appropriate professional behaviour and communication towards all members of the dental team and referring health practitioner/s 1.f. understanding and applying legislation including that related to record-keeping 1.g. demonstrating specialist professional growth and development through research and learning 1.h. supporting the professional development and education for all members of the dental and/or health community, and 1.i. demonstrating leadership in the profession. 2.a. identifying and understanding a patient’s, or their parent’s, guardian’s or carer’s expectations, desires and attitudes when planning and delivering specialist treatment 2.b. communicating effectively with patients, their families, relatives and carers in a manner that takes into account factors such as their age, intellectual development, social and cultural background 2.c. use of technological and telecommunication aids in planning and delivering specialist treatment 2.d. communicating effectively in all forms of health and legal reporting, and 2.e. interpreting and communicating knowledge, skills and ideas. 3.a. critically evaluating scientific research and literature, products and techniques to inform evidence-based specialist practice, and 3.b. synthesising complex information, problems, concepts and theories. 4.1.a. historical and contemporary literature 4.1.b. the scientific basis of dentistry including the relevant biological, medical and psychosocial sciences 4.1.c. development, anatomy, physiology and pathology of hard and soft tissues of the head and neck 4.1.d. the range of investigative, technical and clinical procedures, and 4.1.e. management and treatment planning with multidisciplinary engagement for complex cases, including compromised patients. 4.2.a. biology of wound healing in relation to periodontal and bone defect repair and regeneration 4.2.b. pathogenesis, diagnosis and management of periodontal diseases and conditions 4.2.c. management of periodontal, mucogingival and implant surgery, and 4.2.d. the principles and application of pharmacology. 5.1.a. applying decision-making, clinical reasoning and judgement to develop a comprehensive diagnosis and treatment plan by interpreting and correlating findings from the history, clinical examinations, imaging and other diagnostic tests 5.1.b. managing complex cases, including compromised patients with multidisciplinary management, and 5.1.c. managing complications. 5.2.a. diagnosing periodontal disease and conditions, including peri-implant disease, and 5.2.b. managing soft and hard tissues including implant placement.
	Periodontics - 1.a. recognising the personal limitations and scope of the specialty and knowing when to refer or seek advice appropriately 1.b. practising with personal and professional integrity, honesty and trustworthiness 1.c. providing patient-centred care, including selecting and prioritising treatment options that are compassionate and respectful of patients’ best interests, dignity and choices and which seek to improve community oral health 1.d. understanding and applying the moral, cultural, ethical principles and legal responsibilities involved in the provision of specialist dental care to individual patients, to communities and populations 1.e. displaying appropriate professional behaviour and communication towards all members of the dental team and referring health practitioner/s 1.f. understanding and applying legislation including that related to record-keeping 1.g. demonstrating specialist professional growth and development through research and learning 1.h. supporting the professional development and education for all members of the dental and/or health community, and 1.i. demonstrating leadership in the profession. 2.a. identifying and understanding a patient’s, or their parent’s, guardian’s or carer’s expectations, desires and attitudes when planning and delivering specialist treatment 2.b. communicating effectively with patients, their families, relatives and carers in a manner that takes into account factors such as their age, intellectual development, social and cultural background 2.c. use of technological and telecommunication aids in planning and delivering specialist treatment 2.d. communicating effectively in all forms of health and legal reporting, and 2.e. interpreting and communicating knowledge, skills and ideas. 3.a. critically evaluating scientific research and literature, products and techniques to inform evidence-based specialist practice, and 3.b. synthesising complex information, problems, concepts and theories. 4.1.a. historical and contemporary literature 4.1.b. the scientific basis of dentistry including the relevant biological, medical and psychosocial sciences 4.1.c. development, anatomy, physiology and pathology of hard and soft tissues of the head and neck 4.1.d. the range of investigative, technical and clinical procedures, and 4.1.e. management and treatment planning with multidisciplinary engagement for complex cases, including compromised patients. 4.2.a. biology of wound healing in relation to periodontal and bone defect repair and regeneration 4.2.b. pathogenesis, diagnosis and management of periodontal diseases and conditions 4.2.c. management of periodontal, mucogingival and implant surgery, and 4.2.d. the principles and application of pharmacology. 5.1.a. applying decision-making, clinical reasoning and judgement to develop a comprehensive diagnosis and treatment plan by interpreting and correlating findings from the history, clinical examinations, imaging and other diagnostic tests 5.1.b. managing complex cases, including compromised patients with multidisciplinary management, and 5.1.c. managing complications. 5.2.a. diagnosing periodontal disease and conditions, including peri-implant disease, and 5.2.b. managing soft and hard tissues including implant placement.
	Periodontics - 1.a. recognising the personal limitations and scope of the specialty and knowing when to refer or seek advice appropriately 1.b. practising with personal and professional integrity, honesty and trustworthiness 1.c. providing patient-centred care, including selecting and prioritising treatment options that are compassionate and respectful of patients’ best interests, dignity and choices and which seek to improve community oral health 1.d. understanding and applying the moral, cultural, ethical principles and legal responsibilities involved in the provision of specialist dental care to individual patients, to communities and populations 1.e. displaying appropriate professional behaviour and communication towards all members of the dental team and referring health practitioner/s 1.f. understanding and applying legislation including that related to record-keeping 1.g. demonstrating specialist professional growth and development through research and learning 1.h. supporting the professional development and education for all members of the dental and/or health community, and 1.i. demonstrating leadership in the profession. 2.a. identifying and understanding a patient’s, or their parent’s, guardian’s or carer’s expectations, desires and attitudes when planning and delivering specialist treatment 2.b. communicating effectively with patients, their families, relatives and carers in a manner that takes into account factors such as their age, intellectual development, social and cultural background 2.c. use of technological and telecommunication aids in planning and delivering specialist treatment 2.d. communicating effectively in all forms of health and legal reporting, and 2.e. interpreting and communicating knowledge, skills and ideas. 3.a. critically evaluating scientific research and literature, products and techniques to inform evidence-based specialist practice, and 3.b. synthesising complex information, problems, concepts and theories. 4.1.a. historical and contemporary literature 4.1.b. the scientific basis of dentistry including the relevant biological, medical and psychosocial sciences 4.1.c. development, anatomy, physiology and pathology of hard and soft tissues of the head and neck 4.1.d. the range of investigative, technical and clinical procedures, and 4.1.e. management and treatment planning with multidisciplinary engagement for complex cases, including compromised patients. 4.2.a. biology of wound healing in relation to periodontal and bone defect repair and regeneration 4.2.b. pathogenesis, diagnosis and management of periodontal diseases and conditions 4.2.c. management of periodontal, mucogingival and implant surgery, and 4.2.d. the principles and application of pharmacology. 5.1.a. applying decision-making, clinical reasoning and judgement to develop a comprehensive diagnosis and treatment plan by interpreting and correlating findings from the history, clinical examinations, imaging and other diagnostic tests 5.1.b. managing complex cases, including compromised patients with multidisciplinary management, and 5.1.c. managing complications. 5.2.a. diagnosing periodontal disease and conditions, including peri-implant disease, and 5.2.b. managing soft and hard tissues including implant placement.

Current students

Overview

Overview

Unit details and rules

Teaching staff

Assessment

Assessment

Assessment summary

Assessment criteria

Late submission

Academic integrity

Learning support

Learning support

Simple extensions

Special consideration

Using AI responsibly

Weekly schedule

Weekly schedule

Attendance and class requirements

Study commitment

Learning outcomes