I. Basic Information

Name: Ms. Song

Gender: Female

Age: 53

Chief Complaint: Fractured and mobile left mandibular tooth; requesting extraction and implant‑supported restoration.

Past Medical History: Denies any systemic diseases, and no known food or drug allergies.

Present Dental History: A left mandibular tooth has fractured and become mobile, affecting mastication; presented to our clinic for consultation.

II. Clinical Examination

Intraoral examination was performed.

Radiographic examination was performed.

III. Diagnosis and Treatment Plan

Diagnosis: The left mandibular posterior tooth had been previously treated and is now fractured, with chronic periapical inflammation, granuloma, and a buccal purulent sinus.

Treatment Plan: Minimally invasive extraction of the involved tooth, followed by a restoration‑driven approach using one Hanzu® implant (size 4.5 × 13 mm).

IV. Treatment Procedure

Surgical Procedure: Under local anaesthesia, the tooth was extracted, the osteotomy was prepared, bone graft material was placed, and the Hanzu® implant was inserted. The wound was sutured.

Prosthetic Phase: In April 2025, the definitive restoration was delivered.

V. Case Summary

This case involved immediate implant placement into an extraction socket in a patient with osteoporosis, infection, and significant alveolar bone loss and resorption. The Hanzu® implant system demonstrated strong self‑tapping capability, leading to a favourable clinical outcome.

Compared with delayed implant placement on the right side, the immediate placement on the left side maximised the preservation of alveolar ridge contour and volume.

VI. Clinician Profile

Name: Yan Guangdi

Affiliation/Title: Clinic Director

Honours and Achievements:

Attending Stomatologist (with intermediate qualifications in Prosthodontics and Dental Technology).

Member of the First Committee of the Oral Preventive Medicine Specialty Committee, Henan Preventive Medical Association.

Technical Director of Zhengzhou Yuemeijia Dental Laboratory.

Over 10 years of clinical experience in both dental practice and laboratory fabrication.

Has systematically received formal training in various implant systems from Switzerland, the United States, South Korea, etc., and obtained corresponding certificates; has been engaged in implant dentistry for more than eight years.

Specialises in endodontic therapy, aesthetic restorative dentistry, aesthetic porcelain laminate veneers, functional prosthetic rehabilitation, sinus floor elevation, immediate loading for edentulous arches, minimally invasive implant placement, and minimally invasive tooth extraction.